Merge pull request #4294 from Michael0066/ls1b-dev

bsp:ls1b:rework uart driver and fix some bugs to make it work. tested on ls1b dev board

21 files changed, 1989 insertions, 396 deletions

diff --git a/bsp/ls1bdev/Kconfig b/bsp/ls1bdev/Kconfig
index c1788b1c6b..b02aee337a 100644
--- a/bsp/ls1bdev/Kconfig
+++ b/bsp/ls1bdev/Kconfig
@@ -16,7 +16,6 @@ config PKGS_DIR
     default "packages"
 
 source "$RTT_DIR/Kconfig"
-source "$RTT_DIR/libcpu/mips/common/Kconfig"
 source "$PKGS_DIR/Kconfig"
 
 config SOC_LS1B
@@ -25,16 +24,33 @@ config SOC_LS1B
     select RT_USING_USER_MAIN
     default y
 
+config RT_MEM_SIZE
+    int "Memory Size (MByte)"
+    default 256
+
+config RT_OSC_CLK
+    int "Oscillator Clock (Hz)"
+    default 25000000
+
 if RT_USING_SERIAL
 config RT_USING_UART0
     bool "Using RT_USING_UART0"
-    default y
+    default n
 config RT_USING_UART1
     bool "Using RT_USING_UART1"
     default n
+config RT_USING_UART2
+    bool "Using RT_USING_UART2"
+    default n
 config RT_USING_UART3
     bool "Using RT_USING_UART3"
     default n
+config RT_USING_UART4
+    bool "Using RT_USING_UART4"
+    default n
+config RT_USING_UART5
+    bool "Using RT_USING_UART5"
+    default y
 
 config RT_UART_RX_BUFFER_SIZE
     int "The rx buffer size"
diff --git a/bsp/ls1bdev/drivers/board.c b/bsp/ls1bdev/drivers/board.c
index a3f907f664..8a42f8e3a0 100644
--- a/bsp/ls1bdev/drivers/board.c
+++ b/bsp/ls1bdev/drivers/board.c
@@ -19,7 +19,7 @@
 #include <mips_fpu.h>
 
 #include "board.h"
-#include "uart.h"
+#include "drv_uart.h"
 #include "ls1b.h"
 
 #ifdef RT_USING_RTGUI
@@ -84,6 +84,6 @@ void rt_hw_board_init(void)
 #ifdef RT_USING_COMPONENTS_INIT
     rt_components_board_init();
 #endif
-
+    rt_kprintf("current sr: 0x%08x\n", read_c0_status());
 }
 /*@}*/
diff --git a/bsp/ls1bdev/drivers/board.h b/bsp/ls1bdev/drivers/board.h
index 9ba4f9f25c..fbe2ed8f9c 100644
--- a/bsp/ls1bdev/drivers/board.h
+++ b/bsp/ls1bdev/drivers/board.h
@@ -19,7 +19,7 @@
 void rt_hw_board_init(void);
 
 /* 64M SDRAM */
-#define RT_HW_HEAP_END	(0x80000000 + 64 * 1024 * 1024)
+#define RT_HW_HEAP_END	(0x80000000 + RT_MEM_SIZE * 1024 * 1024)
 #define CPU_HZ			(125 * 1000000)
 
 #endif
diff --git a/bsp/ls1bdev/drivers/drv_uart.c b/bsp/ls1bdev/drivers/drv_uart.c
new file mode 100644
index 0000000000..8f469f26ed
--- /dev/null
+++ b/bsp/ls1bdev/drivers/drv_uart.c
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-05-08     zhuangwei    the first version
+ * 2021-02-02     [email protected]    adapt to ls1b
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <rthw.h>
+#include "drv_uart.h"
+#include "ls1b_pin.h"
+#include "ls1b_uart.h"
+
+/* STM32 uart driver */
+struct rt_uart_ls1b
+{
+    ls1b_uart_t UARTx;
+    rt_uint32_t IRQ;
+};
+
+static rt_err_t ls1b_uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
+{
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+    ls1b_uart_info_t uart_info = {0};
+
+    RT_ASSERT(serial != RT_NULL);
+    RT_ASSERT(cfg != RT_NULL);
+
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+
+    // 初始化串口
+    uart_info.UARTx    = uart_dev->UARTx;
+    uart_info.baudrate = cfg->baud_rate;
+    uart_info.rx_enable = TRUE;
+    uart_init(&uart_info);
+
+    return RT_EOK;
+
+}
+
+static rt_err_t ls1b_uart_control(struct rt_serial_device *serial, int cmd, void *arg)
+{
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_CLR_INT: /* disable rx irq */
+        rt_hw_interrupt_mask(uart_dev->IRQ);
+        break;
+
+    case RT_DEVICE_CTRL_SET_INT: /* enable rx irq */
+        rt_hw_interrupt_umask(uart_dev->IRQ);
+        break;
+
+    default:
+        break;
+    }
+
+    return RT_EOK;
+
+}
+
+static int ls1b_uart_putc(struct rt_serial_device *serial, char c)
+{
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+
+    RT_ASSERT(serial != RT_NULL);
+
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+    uart_putc(uart_dev->UARTx, c);
+
+    return 1;
+}
+
+static int ls1b_uart_getc(struct rt_serial_device *serial)
+{
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+
+    RT_ASSERT(serial != RT_NULL);
+
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+    void *uart_base = uart_get_base(uart_dev->UARTx);
+
+    if (LSR_RXRDY & reg_read_8(uart_base + LS1B_UART_LSR_OFFSET))
+    {
+        return reg_read_8(uart_base + LS1B_UART_DAT_OFFSET);
+    }
+
+    return -1;
+}
+
+/* UART interrupt handler */
+static void uart_irq_handler(int vector, void *param)
+{
+    struct rt_serial_device *serial = (struct rt_serial_device *)param;
+    struct rt_uart_ls1b *uart_dev = RT_NULL;
+
+    RT_ASSERT(serial != RT_NULL);
+
+    uart_dev = (struct rt_uart_ls1b *)serial->parent.user_data;
+    void *uart_base = uart_get_base(uart_dev->UARTx);
+    unsigned char iir = reg_read_8(uart_base + LS1B_UART_IIR_OFFSET);
+
+    // 判断是否为接收超时或接收到有效数据
+    if ((IIR_RXTOUT & iir) || (IIR_RXRDY & iir))
+    {
+        rt_interrupt_enter();
+        rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
+        rt_interrupt_leave();
+    }
+
+}
+
+static const struct rt_uart_ops ls1b_uart_ops =
+{
+    ls1b_uart_configure,
+    ls1b_uart_control,
+    ls1b_uart_putc,
+    ls1b_uart_getc,
+};
+
+
+#if defined(RT_USING_UART1)
+struct rt_uart_ls1b uart1 =
+{
+    LS1B_UART1,
+    LS1B_UART1_IRQ,
+};
+struct rt_serial_device serial1;
+#endif /* RT_USING_UART1 */
+
+#if defined(RT_USING_UART2)
+struct rt_uart_ls1b uart2 =
+{
+    LS1B_UART2,
+    LS1B_UART2_IRQ,
+};
+struct rt_serial_device serial2;
+#endif /* RT_USING_UART2 */
+
+
+#if defined(RT_USING_UART3)
+struct rt_uart_ls1b uart3 =
+{
+    LS1B_UART3,
+    LS1B_UART3_IRQ,
+};
+struct rt_serial_device serial3;
+#endif /* RT_USING_UART3 */
+
+#if defined(RT_USING_UART4)
+struct rt_uart_ls1b uart4 =
+{
+    LS1B_UART4,
+    LS1B_UART4_IRQ,
+};
+struct rt_serial_device serial4;
+#endif /* RT_USING_UART4 */
+
+#if defined(RT_USING_UART5)
+struct rt_uart_ls1b uart5 =
+{
+    LS1B_UART5,
+    LS1B_UART5_IRQ,
+};
+struct rt_serial_device serial5;
+#endif /* RT_USING_UART5 */
+
+
+
+void rt_hw_uart_init(void)
+{
+    struct rt_uart_ls1b *uart;
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+
+#ifdef RT_USING_UART5
+		uart = &uart5;
+	
+		serial5.ops    = &ls1b_uart_ops;
+		serial5.config = config;
+	
+		rt_hw_interrupt_install(uart->IRQ, uart_irq_handler, &serial5, "UART5");
+	
+		/* register UART5 device */
+		rt_hw_serial_register(&serial5,
+							  "uart5",
+							  //RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
+							  RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+							  uart);
+#endif /* RT_USING_UART5 */
+
+
+#ifdef RT_USING_UART2
+    uart = &uart2;
+
+    serial2.ops    = &ls1b_uart_ops;
+    serial2.config = config;
+
+    pin_set_purpose(36, PIN_PURPOSE_OTHER);
+    pin_set_purpose(37, PIN_PURPOSE_OTHER);
+    pin_set_remap(36, PIN_REMAP_SECOND);
+    pin_set_remap(37, PIN_REMAP_SECOND);
+
+    rt_hw_interrupt_install(uart->IRQ, uart_irq_handler, &serial2, "UART2");
+
+    /* register UART2 device */
+    rt_hw_serial_register(&serial2,
+                          "uart2",
+                          //RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_DMA_RX,
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                          uart);
+#endif /* RT_USING_UART2 */
+
+}
+
diff --git a/bsp/ls1bdev/drivers/drv_uart.h b/bsp/ls1bdev/drivers/drv_uart.h
new file mode 100644
index 0000000000..01dfd9aae0
--- /dev/null
+++ b/bsp/ls1bdev/drivers/drv_uart.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-05-08     zhuangwei    the first version
+ */
+
+#ifndef __DRV_UART_H__
+#define __DRV_UART_H__
+
+#include "ls1b.h"
+#include <rthw.h>
+
+#define DEV_CLK 252000000 // 252MHz
+#define UART_BAUDRATE 115200
+
+#define UART0_BASE          0xBFE40000
+//#define UART0_1_BASE      0xBFE41000
+#define UART1_BASE          0xBFE44000
+#define UART2_BASE          0xBFE48000
+#define UART3_BASE          0xBFE4C000
+#define UART4_BASE          0xBFE4C400
+#define UART5_BASE          0xBFE4C500
+#define UART6_BASE          0xBFE4C600
+#define UART7_BASE          0xBFE4C700
+#define UART8_BASE          0xBFE4C800
+#define UART9_BASE          0xBFE4C900
+#define UART10_BASE         0xBFE4Ca00
+#define UART11_BASE         0xBFE4Cb00
+
+/* UART registers */
+#define UART_DAT(base)      HWREG8(base + 0x00)
+#define UART_IER(base)      HWREG8(base + 0x01)
+#define UART_IIR(base)      HWREG8(base + 0x02)
+#define UART_FCR(base)      HWREG8(base + 0x02)
+#define UART_LCR(base)      HWREG8(base + 0x03)
+#define UART_MCR(base)      HWREG8(base + 0x04)
+#define UART_LSR(base)      HWREG8(base + 0x05)
+#define UART_MSR(base)      HWREG8(base + 0x06)
+
+#define UART_LSB(base)      HWREG8(base + 0x00)
+#define UART_MSB(base)      HWREG8(base + 0x01)
+
+/* UART0 registers */
+#define UART0_DAT           HWREG8(UART0_BASE + 0x00)
+#define UART0_IER           HWREG8(UART0_BASE + 0x01)
+#define UART0_IIR           HWREG8(UART0_BASE + 0x02)
+#define UART0_FCR           HWREG8(UART0_BASE + 0x02)
+#define UART0_LCR           HWREG8(UART0_BASE + 0x03)
+#define UART0_MCR           HWREG8(UART0_BASE + 0x04)
+#define UART0_LSR           HWREG8(UART0_BASE + 0x05)
+#define UART0_MSR           HWREG8(UART0_BASE + 0x06)
+
+#define UART0_LSB           HWREG8(UART0_BASE + 0x00)
+#define UART0_MSB           HWREG8(UART0_BASE + 0x01)
+
+/* UART1 registers */
+#define UART1_DAT           HWREG8(UART1_BASE + 0x00)
+#define UART1_IER           HWREG8(UART1_BASE + 0x01)
+#define UART1_IIR           HWREG8(UART1_BASE + 0x02)
+#define UART1_FCR           HWREG8(UART1_BASE + 0x02)
+#define UART1_LCR           HWREG8(UART1_BASE + 0x03)
+#define UART1_MCR           HWREG8(UART1_BASE + 0x04)
+#define UART1_LSR           HWREG8(UART1_BASE + 0x05)
+#define UART1_MSR           HWREG8(UART1_BASE + 0x06)
+
+#define UART1_LSB           HWREG8(UART1_BASE + 0x00)
+#define UART1_MSB           HWREG8(UART1_BASE + 0x01)
+
+/* UART interrupt enable register value */
+#define UARTIER_IME     (1 << 3)
+#define UARTIER_ILE     (1 << 2)
+#define UARTIER_ITXE    (1 << 1)
+#define UARTIER_IRXE    (1 << 0)
+
+/* UART line control register value */
+#define UARTLCR_DLAB    (1 << 7)
+#define UARTLCR_BCB     (1 << 6)
+#define UARTLCR_SPB     (1 << 5)
+#define UARTLCR_EPS     (1 << 4)
+#define UARTLCR_PE      (1 << 3)
+#define UARTLCR_SB      (1 << 2)
+
+/* UART line status register value */
+#define UARTLSR_ERROR   (1 << 7)
+#define UARTLSR_TE      (1 << 6)
+#define UARTLSR_TFE     (1 << 5)
+#define UARTLSR_BI      (1 << 4)
+#define UARTLSR_FE      (1 << 3)
+#define UARTLSR_PE      (1 << 2)
+#define UARTLSR_OE      (1 << 1)
+#define UARTLSR_DR      (1 << 0)
+
+void rt_hw_uart_init(void);
+
+
+#endif
diff --git a/bsp/ls1bdev/drivers/uart.c b/bsp/ls1bdev/drivers/uart.c
deleted file mode 100644
index e920d33057..0000000000
--- a/bsp/ls1bdev/drivers/uart.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/*
- * File      : board.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006-2012, RT-Thread Develop Team
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
- *
- * Change Logs:
- * Date           Author       Notes
- * 2011-08-08     lgnq         first version
- */
-
-#include <rthw.h>
-#include <rtthread.h>
-
-#include "uart.h"
-
-/**
- * @addtogroup Loongson LS1B
- */
-
-/*@{*/
-
-#if defined(RT_USING_DEVICE)
-
-struct rt_uart_ls1b
-{
-    struct rt_device parent;
-
-    rt_uint32_t hw_base;
-    rt_uint32_t irq;
-
-    /* buffer for reception */
-    rt_uint8_t read_index, save_index;
-    rt_uint8_t rx_buffer[RT_UART_RX_BUFFER_SIZE];
-}uart_device;
-
-static void rt_uart_irqhandler(int irqno, void *param)
-{
-    rt_ubase_t level;
-    rt_uint8_t isr;
-    struct rt_uart_ls1b *uart = &uart_device;
-
-    /* read interrupt status and clear it */
-    isr = UART_IIR(uart->hw_base);
-    isr = (isr >> 1) & 0x3;
-
-    /* receive data available */
-    if (isr & 0x02)
-    {
-        /* Receive Data Available */
-        while (UART_LSR(uart->hw_base) & UARTLSR_DR)
-        {
-            uart->rx_buffer[uart->save_index] = UART_DAT(uart->hw_base);
-
-            level = rt_hw_interrupt_disable();
-            uart->save_index ++;
-            if (uart->save_index >= RT_UART_RX_BUFFER_SIZE)
-                uart->save_index = 0;
-            rt_hw_interrupt_enable(level);
-        }
-
-        /* invoke callback */
-        if (uart->parent.rx_indicate != RT_NULL)
-        {
-            rt_size_t length;
-            if (uart->read_index > uart->save_index)
-                length = RT_UART_RX_BUFFER_SIZE - uart->read_index + uart->save_index;
-            else
-                length = uart->save_index - uart->read_index;
-
-            uart->parent.rx_indicate(&uart->parent, length);
-        }
-    }
-
-    return;
-}
-
-static rt_err_t rt_uart_init(rt_device_t dev)
-{
-    rt_uint32_t baud_div;
-    struct rt_uart_ls1b *uart = (struct rt_uart_ls1b *)dev;
-
-    RT_ASSERT(uart != RT_NULL);
-
-#if 0
-    /* init UART Hardware */
-    UART_IER(uart->hw_base) = 0; /* clear interrupt */
-    UART_FCR(uart->hw_base) = 0x60; /* reset UART Rx/Tx */
-
-    /* enable UART clock */
-    /* set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */
-    UART_LCR(uart->hw_base) = 0x3;
-
-    /* set baudrate */
-    baud_div = DEV_CLK / 16 / UART_BAUDRATE;
-    UART_LCR(uart->hw_base) |= UARTLCR_DLAB;
-
-    UART_MSB(uart->hw_base) = (baud_div >> 8) & 0xff;
-    UART_LSB(uart->hw_base) = baud_div & 0xff;
-
-    UART_LCR(uart->hw_base) &= ~UARTLCR_DLAB;
-
-    /* Enable UART unit, enable and clear FIFO */
-    UART_FCR(uart->hw_base) = UARTFCR_UUE | UARTFCR_FE | UARTFCR_TFLS | UARTFCR_RFLS;
-#endif
-
-    return RT_EOK;
-}
-
-static rt_err_t rt_uart_open(rt_device_t dev, rt_uint16_t oflag)
-{
-    struct rt_uart_ls1b *uart = (struct rt_uart_ls1b *)dev;
-
-    RT_ASSERT(uart != RT_NULL);
-    if (dev->flag & RT_DEVICE_FLAG_INT_RX)
-    {
-        /* Enable the UART Interrupt */
-        UART_IER(uart->hw_base) |= UARTIER_IRXE;
-
-        /* install interrupt */
-        rt_hw_interrupt_install(uart->irq, rt_uart_irqhandler, RT_NULL, "UART");
-        rt_hw_interrupt_umask(uart->irq);
-    }
-    return RT_EOK;
-}
-
-static rt_err_t rt_uart_close(rt_device_t dev)
-{
-    struct rt_uart_ls1b *uart = (struct rt_uart_ls1b *)dev;
-
-    RT_ASSERT(uart != RT_NULL);
-    if (dev->flag & RT_DEVICE_FLAG_INT_RX)
-    {
-        /* Disable the UART Interrupt */
-        UART_IER(uart->hw_base) &= ~(UARTIER_IRXE);
-    }
-
-    return RT_EOK;
-}
-
-static rt_size_t rt_uart_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
-{
-    rt_uint8_t *ptr;
-    struct rt_uart_ls1b *uart = (struct rt_uart_ls1b *)dev;
-
-    RT_ASSERT(uart != RT_NULL);
-
-    /* point to buffer */
-    ptr = (rt_uint8_t *)buffer;
-    if (dev->flag & RT_DEVICE_FLAG_INT_RX)
-    {
-        while (size)
-        {
-            /* interrupt receive */
-            rt_base_t level;
-
-            /* disable interrupt */
-            level = rt_hw_interrupt_disable();
-            if (uart->read_index != uart->save_index)
-            {
-                *ptr = uart->rx_buffer[uart->read_index];
-
-                uart->read_index ++;
-                if (uart->read_index >= RT_UART_RX_BUFFER_SIZE)
-                    uart->read_index = 0;
-            }
-            else
-            {
-                /* no data in rx buffer */
-
-                /* enable interrupt */
-                rt_hw_interrupt_enable(level);
-                break;
-            }
-
-            /* enable interrupt */
-            rt_hw_interrupt_enable(level);
-
-            ptr ++;
-            size --;
-        }
-
-        return (rt_uint32_t)ptr - (rt_uint32_t)buffer;
-    }
-
-    return 0;
-}
-
-static rt_size_t rt_uart_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
-{
-    char *ptr;
-    struct rt_uart_ls1b *uart = (struct rt_uart_ls1b *)dev;
-
-    RT_ASSERT(uart != RT_NULL);
-
-    ptr = (char *)buffer;
-
-    if (dev->flag & RT_DEVICE_FLAG_STREAM)
-    {
-        /* stream mode */
-        while (size)
-        {
-            if (*ptr == '\n')
-            {
-                /* FIFO status, contain valid data */
-                while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
-                /* write data */
-                UART_DAT(uart->hw_base) = '\r';
-            }
-
-            /* FIFO status, contain valid data */
-            while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
-            /* write data */
-            UART_DAT(uart->hw_base) = *ptr;
-
-            ptr ++;
-            size --;
-        }
-    }
-    else
-    {
-        while (size != 0)
-        {
-            /* FIFO status, contain valid data */
-            while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
-
-            /* write data */
-            UART_DAT(uart->hw_base) = *ptr;
-
-            ptr++;
-            size--;
-        }
-    }
-
-    return (rt_size_t)ptr - (rt_size_t)buffer;
-}
-
-void rt_hw_uart_init(void)
-{
-    struct rt_uart_ls1b *uart;
-
-    /* get uart device */
-    uart = &uart_device;
-
-    /* device initialization */
-    uart->parent.type = RT_Device_Class_Char;
-    rt_memset(uart->rx_buffer, 0, sizeof(uart->rx_buffer));
-    uart->read_index = uart->save_index = 0;
-
-#if defined(RT_USING_UART0)
-    uart->hw_base = UART0_BASE;
-    uart->irq = LS1B_UART0_IRQ;
-#elif defined(RT_USING_UART1)
-    uart->hw_base = UART1_BASE;
-    uart->irq = LS1B_UART1_IRQ;
-#elif defined(RT_USING_UART3)
-    uart->hw_base = UART3_BASE;
-    uart->irq = LS1B_UART3_IRQ;
-#endif
-
-    /* device interface */
-    uart->parent.init       = rt_uart_init;
-    uart->parent.open       = rt_uart_open;
-    uart->parent.close      = rt_uart_close;
-    uart->parent.read       = rt_uart_read;
-    uart->parent.write      = rt_uart_write;
-    uart->parent.control    = RT_NULL;
-    uart->parent.user_data  = RT_NULL;
-
-    rt_device_register(&uart->parent, "uart0",
-                        RT_DEVICE_FLAG_RDWR |
-                        RT_DEVICE_FLAG_STREAM |
-                        RT_DEVICE_FLAG_INT_RX);
-}
-#endif /* end of UART */
-
-/*@}*/
diff --git a/bsp/ls1bdev/drivers/uart.h b/bsp/ls1bdev/drivers/uart.h
deleted file mode 100644
index bec660b740..0000000000
--- a/bsp/ls1bdev/drivers/uart.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * File      : uart.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006-2012, RT-Thread Develop Team
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
- *
- * Change Logs:
- * Date           Author       Notes
- * 2011-08-08     lgnq         first version for LS1B
- */
-
-#ifndef __UART_H__
-#define __UART_H__
-
-#include "ls1b.h"
-#include <rthw.h>
-
-#define UART0_BASE		    0xBFE40000
-#define UART0_1_BASE		0xBFE41000
-#define UART0_2_BASE		0xBFE42000
-#define UART0_3_BASE		0xBFE43000
-#define UART1_BASE			0xBFE44000
-#define UART1_1_BASE		0xBFE45000
-#define UART1_2_BASE		0xBFE46000
-#define UART1_3_BASE		0xBFE47000
-#define UART2_BASE			0xBFE48000
-#define UART3_BASE			0xBFE4C000
-#define UART4_BASE			0xBFE6C000
-#define UART5_BASE			0xBFE7C000
-
-/* UART registers */
-#define UART_DAT(base)		HWREG8(base + 0x00)
-#define UART_IER(base)		HWREG8(base + 0x01)
-#define UART_IIR(base)		HWREG8(base + 0x02)
-#define UART_FCR(base)		HWREG8(base + 0x02)
-#define UART_LCR(base)		HWREG8(base + 0x03)
-#define UART_MCR(base)		HWREG8(base + 0x04)
-#define UART_LSR(base)		HWREG8(base + 0x05)
-#define UART_MSR(base)		HWREG8(base + 0x06)
-
-#define UART_LSB(base)		HWREG8(base + 0x00)
-#define UART_MSB(base)		HWREG8(base + 0x01)
-
-/* UART0 registers */
-#define UART0_DAT			HWREG8(UART0_BASE + 0x00)
-#define UART0_IER			HWREG8(UART0_BASE + 0x01)
-#define UART0_IIR			HWREG8(UART0_BASE + 0x02)
-#define UART0_FCR			HWREG8(UART0_BASE + 0x02)
-#define UART0_LCR			HWREG8(UART0_BASE + 0x03)
-#define UART0_MCR			HWREG8(UART0_BASE + 0x04)
-#define UART0_LSR			HWREG8(UART0_BASE + 0x05)
-#define UART0_MSR			HWREG8(UART0_BASE + 0x06)
-
-#define UART0_LSB			HWREG8(UART0_BASE + 0x00)
-#define UART0_MSB			HWREG8(UART0_BASE + 0x01)
-
-/* UART1 registers */
-#define UART1_DAT			HWREG8(UART1_BASE + 0x00)
-#define UART1_IER			HWREG8(UART1_BASE + 0x01)
-#define UART1_IIR			HWREG8(UART1_BASE + 0x02)
-#define UART1_FCR			HWREG8(UART1_BASE + 0x02)
-#define UART1_LCR			HWREG8(UART1_BASE + 0x03)
-#define UART1_MCR			HWREG8(UART1_BASE + 0x04)
-#define UART1_LSR			HWREG8(UART1_BASE + 0x05)
-#define UART1_MSR			HWREG8(UART1_BASE + 0x06)
-
-#define UART1_LSB			HWREG8(UART1_BASE + 0x00)
-#define UART1_MSB			HWREG8(UART1_BASE + 0x01)
-
-/* UART interrupt enable register value */
-#define UARTIER_IME		(1 << 3)
-#define UARTIER_ILE		(1 << 2) 
-#define UARTIER_ITXE	(1 << 1)
-#define UARTIER_IRXE	(1 << 0)
-
-/* UART line control register value */
-#define UARTLCR_DLAB	(1 << 7)
-#define UARTLCR_BCB		(1 << 6)
-#define UARTLCR_SPB		(1 << 5)
-#define UARTLCR_EPS		(1 << 4)
-#define UARTLCR_PE		(1 << 3)
-#define UARTLCR_SB		(1 << 2)
-
-/* UART line status register value */
-#define UARTLSR_ERROR	(1 << 7)
-#define UARTLSR_TE		(1 << 6)
-#define UARTLSR_TFE		(1 << 5)
-#define UARTLSR_BI		(1 << 4)
-#define UARTLSR_FE		(1 << 3)
-#define UARTLSR_PE		(1 << 2)
-#define UARTLSR_OE		(1 << 1)
-#define UARTLSR_DR		(1 << 0)
-
-void rt_hw_uart_init(void);
-
-#endif
diff --git a/bsp/ls1bdev/libraries/SConscript b/bsp/ls1bdev/libraries/SConscript
new file mode 100644
index 0000000000..78797ef273
--- /dev/null
+++ b/bsp/ls1bdev/libraries/SConscript
@@ -0,0 +1,10 @@
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+
+CPPPATH = [cwd]
+
+group = DefineGroup('Libraries', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/bsp/ls1bdev/libraries/ls1b_clock.c b/bsp/ls1bdev/libraries/ls1b_clock.c
new file mode 100644
index 0000000000..05547a158c
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_clock.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     勤为本       first version
+ * 2021-02-02     [email protected]       adapt to ls1b
+ */
+
+
+#include "rtconfig.h"
+#include "ls1b_regs.h"
+#include "ls1b_public.h"
+
+
+// 晶振的频率
+#define AHB_CLK                 (RT_OSC_CLK)
+#define APB_CLK                 (AHB_CLK)
+
+#define DIV_DC_EN			(0x1 << 31)
+#define DIV_DC				(0x1f << 26)
+#define DIV_CPU_EN			(0x1 << 25)
+#define DIV_CPU				(0x1f << 20)
+#define DIV_DDR_EN			(0x1 << 19)
+#define DIV_DDR				(0x1f << 14)
+
+#define DIV_DC_SHIFT			26
+#define DIV_CPU_SHIFT			20
+#define DIV_DDR_SHIFT			14
+
+
+/*
+ * 获取PLL频率
+ * @ret PLL频率
+ */
+unsigned long clk_get_pll_rate(void)
+{
+    unsigned int ctrl;
+    unsigned long pll_rate = 0;
+
+    ctrl = reg_read_32((volatile unsigned int *)LS1B_START_FREQ);
+	pll_rate = (12 + (ctrl & 0x3f)) * APB_CLK / 2
+		+ ((ctrl >> 8) & 0x3ff) * APB_CLK / 1024 / 2;
+
+    return pll_rate;
+}
+
+
+/*
+ * 获取CPU频率
+ * @ret CPU频率
+ */
+unsigned long clk_get_cpu_rate(void)
+{
+    unsigned long pll_rate, cpu_rate;
+    unsigned int ctrl;
+
+    pll_rate = clk_get_pll_rate();
+    ctrl = reg_read_32((volatile unsigned int *)LS1B_CLK_DIV_PARAM);
+	cpu_rate = pll_rate / ((ctrl & DIV_CPU) >> DIV_CPU_SHIFT);
+
+    return cpu_rate;
+}
+
+
+/*
+ * 获取DDR频率
+ * @ret DDR频率
+ */
+unsigned long clk_get_ddr_rate(void)
+{
+    unsigned long pll_rate, ddr_rate;
+	unsigned int ctrl;
+
+	pll_rate = clk_get_pll_rate();
+	ctrl = reg_read_32((volatile unsigned int *)LS1B_CLK_DIV_PARAM);
+
+	ddr_rate = pll_rate / ((ctrl & DIV_DDR) >> DIV_DDR_SHIFT);
+
+    return ddr_rate;
+}
+
+
+/*
+ * 获取APB频率
+ * @ret APB频率
+ */
+unsigned long clk_get_apb_rate(void)
+{
+    return clk_get_ddr_rate() / 2;
+}
+
+
+/*
+ * 获取DC频率
+ * @ret DC频率
+ */
+unsigned long clk_get_dc_rate(void)
+{
+    unsigned long pll_rate, dc_rate;
+    unsigned int ctrl;
+
+    pll_rate = clk_get_pll_rate();
+    ctrl = reg_read_32((volatile unsigned int *)LS1B_CLK_DIV_PARAM);
+
+    dc_rate = pll_rate ;
+
+    return dc_rate;
+}
+
+
+
diff --git a/bsp/ls1bdev/libraries/ls1b_clock.h b/bsp/ls1bdev/libraries/ls1b_clock.h
new file mode 100644
index 0000000000..bd22986e4c
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_clock.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     ����       first version
+ */
+
+
+#ifndef __LOONGSON_CLOCK_H
+#define __LOONGSON_CLOCK_H
+
+
+
+/*
+ * ��ȡPLLƵ��
+ * @ret PLLƵ��
+ */
+unsigned long clk_get_pll_rate(void);
+
+
+/*
+ * ��ȡCPUƵ��
+ * @ret CPUƵ��
+ */
+unsigned long clk_get_cpu_rate(void);
+
+
+
+/*
+ * ��ȡDDRƵ��
+ * @ret DDRƵ��
+ */
+unsigned long clk_get_ddr_rate(void);
+
+
+/*
+ * ��ȡAPBƵ��
+ * @ret APBƵ��
+ */
+unsigned long clk_get_apb_rate(void);
+
+
+/*
+ * ��ȡDCƵ��
+ * @ret DCƵ��
+ */
+unsigned long clk_get_dc_rate(void);
+
+
+
+#endif
+
diff --git a/bsp/ls1bdev/libraries/ls1b_gpio.c b/bsp/ls1bdev/libraries/ls1b_gpio.c
new file mode 100644
index 0000000000..2e100e7122
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_gpio.c
@@ -0,0 +1,238 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     勤为本       first version
+ * 2021-02-02     [email protected]       adapt to ls1b
+ */
+
+
+#include "ls1b_public.h"
+#include "ls1b_regs.h"
+#include "ls1b_gpio.h"
+#include "ls1b_pin.h"
+
+
+/*
+ * 获取指定gpio的CFG寄存器
+ * @gpio gpio编号
+ * @ret CFG寄存器
+ */
+volatile unsigned int *gpio_get_cfg_reg(unsigned int gpio)
+{
+    volatile unsigned int *gpio_cfgx = NULL;            // GPIO_CFGx寄存器
+    unsigned int port = GPIO_GET_PORT(gpio);
+
+    switch (port)
+    {
+        case 0:
+            gpio_cfgx = (volatile unsigned int *)LS1B_GPIO_CFG0;
+            break;
+
+        case 1:
+            gpio_cfgx = (volatile unsigned int *)LS1B_GPIO_CFG1;
+            break;
+        default:
+            gpio_cfgx = NULL;
+            break;
+    }
+
+    return gpio_cfgx;
+}
+
+
+/*
+ * 获取指定gpio的EN寄存器
+ * @gpio gpio编号
+ * @ret EN寄存器
+ */
+volatile unsigned int *gpio_get_en_reg(unsigned int gpio)
+{
+    volatile unsigned int *gpio_enx = NULL;         // GPIO_ENx寄存器
+    unsigned int port = GPIO_GET_PORT(gpio);
+    
+    switch (port)
+    {
+        case 0:
+            gpio_enx = (volatile unsigned int *)LS1B_GPIO_EN0;
+            break;
+
+        case 1:
+            gpio_enx = (volatile unsigned int *)LS1B_GPIO_EN1;
+            break;
+        default:
+            gpio_enx    = NULL;
+            return gpio_enx;
+    }
+
+    return gpio_enx;
+}
+
+/*
+ * gpio初始化
+ * @gpio gpio引脚，取值范围[0, 127]
+ * @mode gpio的工作模式(输入、输出)
+ *
+ * 例: 将gpio50初始化为输出
+ * gpio_init(50, gpio_mode_output);
+ */
+void gpio_init(unsigned int gpio, gpio_mode_t mode)
+{
+    volatile unsigned int *gpio_enx = NULL;        // GPIO_ENx寄存器
+    unsigned int pin = GPIO_GET_PIN(gpio);
+
+    // 将pin设为普通GPIO
+    pin_set_purpose(gpio, PIN_PURPOSE_GPIO);
+
+    // 设置gpio工作模式(输入、输出)
+    gpio_enx  = gpio_get_en_reg(gpio);
+    if (gpio_mode_output == mode)       // 输出
+    {
+        reg_clr_one_bit(gpio_enx, pin);
+    }
+    else                                // 输入
+    {
+        reg_set_one_bit(gpio_enx, pin);
+    }
+
+    return ;
+}
+
+
+/*
+ * 在指定gpio输出高电平或低电平
+ * @gpio gpio引脚，取值范围[0, 127]
+ * @level 电平值
+ *
+ * 例: 在gpio50上输出低电平
+ * gpio_set(50, gpio_level_low);
+ */
+void gpio_set(unsigned int gpio, gpio_level_t level)
+{
+    volatile unsigned int *gpio_outx = NULL;       // GPIO_OUTx寄存器
+    unsigned int port   = GPIO_GET_PORT(gpio);
+    unsigned int pin    = GPIO_GET_PIN(gpio);
+
+    // 获取寄存器地址
+    switch (port)
+    {
+        case 0:
+            gpio_outx = (volatile unsigned int *)LS1B_GPIO_OUT0;
+            break;
+
+        case 1:
+            gpio_outx = (volatile unsigned int *)LS1B_GPIO_OUT1;
+            break;
+        default:        // 正确的程序不应该走到这里，直接返回
+            return ;
+    }
+
+    // 输出
+    if (gpio_level_low == level)
+    {
+        reg_clr_one_bit(gpio_outx, pin);
+    }
+    else
+    {
+        reg_set_one_bit(gpio_outx, pin);
+    }
+
+    return ;
+}
+
+
+/*
+ * 读取指定gpio引脚的值
+ * @gpio gpio引脚，取值范围[0,127]
+ *
+ * 例: 读取gpio50引脚上的值
+ * gpio_level_t level;
+ * level = gpio_get(50);
+ */
+unsigned int gpio_get(unsigned int gpio)
+{
+    volatile unsigned int *gpio_inx = NULL;        // GPIO_INx寄存器
+    unsigned int port   = GPIO_GET_PORT(gpio);
+    unsigned int pin    = GPIO_GET_PIN(gpio);
+
+    // 获取寄存器地址
+    switch (port)
+    {
+        case 0:
+            gpio_inx = (volatile unsigned int *)LS1B_GPIO_IN0;
+            break;
+
+        case 1:
+            gpio_inx = (volatile unsigned int *)LS1B_GPIO_IN1;
+            break;
+        default:        // 正常的流程不应该走到这里，直接返回
+            return 0;
+    }
+
+    // 读取
+    return reg_get_bit(gpio_inx, pin);
+}
+
+
+/**
+ * 设置中断类型
+ * @gpio gpio引脚
+ * @type 触发中断的条件。高电平触发、低电平触发、上升沿触发 or 下降沿触发
+ */
+void gpio_set_irq_type(unsigned int gpio, gpio_irq_type_t type)
+{
+    volatile unsigned int *int_pol = NULL;     // 中断极性选择寄存器
+    volatile unsigned int *int_edge = NULL;    // 中断边沿选择寄存器
+    unsigned int port = GPIO_GET_PORT(gpio);
+    unsigned int pin  = GPIO_GET_PIN(gpio);
+
+    // 获取寄存器地址
+    switch (port)
+    {
+        case 0:     // GPIO[31:0]
+            int_pol     = (volatile unsigned int *)LS1B_INT2_POL;
+            int_edge    = (volatile unsigned int *)LS1B_INT2_EDGE;
+            break;
+
+        case 1:     // GPIO[63:32]
+            int_pol     = (volatile unsigned int *)LS1B_INT3_POL;
+            int_edge    = (volatile unsigned int *)LS1B_INT3_EDGE;
+            break;
+
+    }
+
+    // 设置中断类型
+    switch (type)
+    {
+        case IRQ_TYPE_EDGE_RISING:
+            *int_pol    |= (1 << pin);
+            *int_edge   |= (1 << pin);
+            break;
+
+        case IRQ_TYPE_EDGE_FALLING:
+            *int_pol    &= ~(1 << pin);
+            *int_edge   |= (1 << pin);
+            break;
+
+        case IRQ_TYPE_LEVEL_HIGH:
+            *int_pol    |= (1 << pin);
+            *int_edge   &= ~(1 << pin);
+            break;
+
+        case IRQ_TYPE_LEVEL_LOW:
+            *int_pol    &= ~(1 << pin);
+            *int_edge   &= ~(1 << pin);
+            break;
+
+        default:
+            break;
+    }
+
+    return ;
+}
+
+
+    
diff --git a/bsp/ls1bdev/libraries/ls1b_gpio.h b/bsp/ls1bdev/libraries/ls1b_gpio.h
new file mode 100644
index 0000000000..cfbe148020
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_gpio.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     勤为本       first version
+ */
+
+
+#ifndef __LOONGSON_GPIO_H
+#define __LOONGSON_GPIO_H
+
+
+
+// 龙芯1c的gpio是按照0,1,2,3,4...这样的顺序编号的，
+// 但在操作寄存器的时候，又是按照每32个一组来分的
+// 这里利用这个特性，将每组的32个gpio叫做一个"port"，每个gpio在每组中的索引叫"pin"
+// port = gpio / 32
+// pin  = gpio % 32
+// 例如GPIO50，port=1,pin=18
+#define GPIO_GET_PORT(gpio)                 ((gpio) / 32)
+#define GPIO_GET_PIN(gpio)                  ((gpio) % 32)
+
+
+// gpio的工作模式--输入、输出
+typedef enum{
+    gpio_mode_output = 0,       // 输出
+    gpio_mode_input = 1         // 输入
+}gpio_mode_t;
+
+
+//  gpio高低电平值
+typedef enum{
+    gpio_level_low = 0,         // 低电平
+    gpio_level_high = 1         // 高电平
+}gpio_level_t;
+
+
+typedef enum {
+    // 上升沿触发
+	IRQ_TYPE_EDGE_RISING	= 0x00000001,
+	// 下降沿触发
+	IRQ_TYPE_EDGE_FALLING	= 0x00000002,
+	IRQ_TYPE_EDGE_BOTH	= (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING),
+	// 高电平触发
+	IRQ_TYPE_LEVEL_HIGH	= 0x00000004,
+	// 低电平触发
+	IRQ_TYPE_LEVEL_LOW	= 0x00000008,
+	IRQ_TYPE_LEVEL_MASK	= (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),	
+}gpio_irq_type_t;
+
+
+
+/*
+ * 获取指定gpio的CFG寄存器
+ * @gpio gpio编号
+ * @ret CFG寄存器
+ */
+volatile unsigned int *gpio_get_cfg_reg(unsigned int gpio);
+
+/*
+ * gpio初始化
+ * @gpio gpio引脚，取值范围[0, 127]
+ * @mode gpio的工作模式(输入、输出)
+ *
+ * 例: 将gpio50初始化为输出
+ * gpio_init(50, gpio_mode_output);
+ */
+void gpio_init(unsigned int gpio, gpio_mode_t mode);
+
+
+/*
+ * 在指定gpio输出高电平或低电平
+ * @gpio gpio引脚，取值范围[0, 127]
+ * @level 电平值
+ *
+ * 例: 在gpio50上输出低电平
+ * gpio_set(50, gpio_level_low);
+ */
+void gpio_set(unsigned int gpio, gpio_level_t level);
+
+
+
+/*
+ * 读取指定gpio引脚的值
+ * @gpio gpio引脚，取值范围[0,127]
+ *
+ * 例: 读取gpio50引脚上的值
+ * gpio_level_t level;
+ * level = gpio_get(50);
+ */
+unsigned int gpio_get(unsigned int gpio);
+
+
+
+/**
+ * 设置中断类型
+ * @gpio gpio引脚
+ * @type 触发中断的条件。高电平触发、低电平触发、上升沿触发 or 下降沿触发
+ */
+void gpio_set_irq_type(unsigned int gpio, gpio_irq_type_t type);
+
+
+
+#endif
+
diff --git a/bsp/ls1bdev/libraries/ls1b_pin.c b/bsp/ls1bdev/libraries/ls1b_pin.c
new file mode 100644
index 0000000000..58d9e7e46c
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_pin.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     勤为本       first version
+ * 2021-02-02     [email protected]       adapt to ls1b
+ */
+
+// 引脚功能(普通gpio，pwm，复用等)相关接口
+
+
+#include "ls1b_public.h"
+#include "ls1b_regs.h"
+#include "ls1b_gpio.h"
+#include "ls1b_pin.h"
+
+
+/*
+ * 把指定pin设置为指定用途(普通gpio，非gpio)
+ * @gpio gpio引脚编号
+ * @purpose 用途
+ */
+void pin_set_purpose(unsigned int gpio, pin_purpose_t purpose)
+{
+    volatile unsigned int *gpio_cfgx;           // GPIO_CFGx寄存器
+    unsigned int pin = GPIO_GET_PIN(gpio);
+
+    gpio_cfgx = gpio_get_cfg_reg(gpio);
+    if (PIN_PURPOSE_GPIO == purpose)            // 引脚用作普通gpio
+    {
+        reg_set_one_bit(gpio_cfgx, pin);
+    }
+    else                                        // 引脚用作其它功能(非gpio)
+    {
+        reg_clr_one_bit(gpio_cfgx, pin);
+    }
+
+    return ;
+}
+
+
+
+/*
+ * 设置指定pin为第n复用
+ * @gpio gpio编号
+ * @remap 第n复用
+ */
+void pin_set_remap(unsigned int gpio, pin_remap_t remap)
+{
+    volatile unsigned int *reg = NULL;          // 复用寄存器
+    unsigned int port = GPIO_GET_PORT(gpio);
+    unsigned int pin  = GPIO_GET_PIN(gpio);
+    int i;
+
+    /*指定全部pin复用为0*/
+    for (i = 0; i <= 4; i++)
+    {
+        reg = (volatile unsigned int *)((LS1B_CBUS_FIRST0) + ((port) * 0x04) + ((i) * 0x10));
+        // 置0
+        reg_clr_one_bit(reg, pin);
+    }
+
+    if (remap == PIN_REMAP_DEFAULT) return;
+
+    switch (port)
+    {
+    case 0:
+        switch (remap)
+        {
+        case PIN_REMAP_FIRST:
+            reg = (volatile unsigned int *)LS1B_CBUS_FIRST0;
+            break;
+        case PIN_REMAP_SECOND:
+            reg = (volatile unsigned int *)LS1B_CBUS_SECOND0;
+            break;
+        case PIN_REMAP_THIRD:
+            reg = (volatile unsigned int *)LS1B_CBUS_THIRD0;
+            break;
+        case PIN_REMAP_FOURTH:
+            reg = (volatile unsigned int *)LS1B_CBUS_FOURTH0;
+            break;
+        case PIN_REMAP_FIFTH:
+            reg = (volatile unsigned int *)LS1B_CBUS_FIFTH0;
+            break;
+        }
+        break;
+
+    case 1:
+        switch (remap)
+        {
+        case PIN_REMAP_FIRST:
+            reg = (volatile unsigned int *)LS1B_CBUS_FIRST1;
+            break;
+        case PIN_REMAP_SECOND:
+            reg = (volatile unsigned int *)LS1B_CBUS_SECOND1;
+            break;
+        case PIN_REMAP_THIRD:
+            reg = (volatile unsigned int *)LS1B_CBUS_THIRD1;
+            break;
+        case PIN_REMAP_FOURTH:
+            reg = (volatile unsigned int *)LS1B_CBUS_FOURTH1;
+            break;
+        case PIN_REMAP_FIFTH:
+            reg = (volatile unsigned int *)LS1B_CBUS_FIFTH1;
+            break;
+        }
+        break;
+
+    case 2:
+        switch (remap)
+        {
+        case PIN_REMAP_FIRST:
+            reg = (volatile unsigned int *)LS1B_CBUS_FIRST2;
+            break;
+        case PIN_REMAP_SECOND:
+            reg = (volatile unsigned int *)LS1B_CBUS_SECOND2;
+            break;
+        case PIN_REMAP_THIRD:
+            reg = (volatile unsigned int *)LS1B_CBUS_THIRD2;
+            break;
+        case PIN_REMAP_FOURTH:
+            reg = (volatile unsigned int *)LS1B_CBUS_FOURTH2;
+            break;
+        case PIN_REMAP_FIFTH:
+            reg = (volatile unsigned int *)LS1B_CBUS_FIFTH2;
+            break;
+        }
+        break;
+
+    case 3:
+        switch (remap)
+        {
+        case PIN_REMAP_FIRST:
+            reg = (volatile unsigned int *)LS1B_CBUS_FIRST3;
+            break;
+        case PIN_REMAP_SECOND:
+            reg = (volatile unsigned int *)LS1B_CBUS_SECOND3;
+            break;
+        case PIN_REMAP_THIRD:
+            reg = (volatile unsigned int *)LS1B_CBUS_THIRD3;
+            break;
+        case PIN_REMAP_FOURTH:
+            reg = (volatile unsigned int *)LS1B_CBUS_FOURTH3;
+            break;
+        case PIN_REMAP_FIFTH:
+            reg = (volatile unsigned int *)LS1B_CBUS_FIFTH3;
+            break;
+        }
+        break;
+
+    default:
+        return ;
+    }
+
+    // 置1
+    reg_set_one_bit(reg, pin);
+
+    return ;
+}
+
+
+
diff --git a/bsp/ls1bdev/libraries/ls1b_pin.h b/bsp/ls1bdev/libraries/ls1b_pin.h
new file mode 100644
index 0000000000..af63ba4187
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_pin.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     勤为本       first version
+ */
+
+// 引脚功能(普通gpio，pwm，复用等)相关接口
+
+#ifndef __LOONGSON_PIN_H
+#define __LOONGSON_PIN_H
+
+
+// 引脚用途
+typedef enum
+{
+    PIN_PURPOSE_GPIO = 0,               // 引脚用作普通gpio
+    PIN_PURPOSE_OTHER,                  // 引脚用作其它功能(非gpio)
+}pin_purpose_t;
+
+
+// 引脚复用
+typedef enum
+{
+    PIN_REMAP_FIRST = 0,                // 第一复用
+    PIN_REMAP_SECOND,                   // 第二复用
+    PIN_REMAP_THIRD,                    // 第三复用
+    PIN_REMAP_FOURTH,                   // 第四复用
+    PIN_REMAP_FIFTH,                    // 第五复用
+    PIN_REMAP_DEFAULT,                //缺省复用
+}pin_remap_t;
+
+
+/*
+ * 把指定pin设置为指定用途(普通gpio，非gpio)
+ * @gpio gpio引脚编号
+ * @purpose 用途
+ */
+void pin_set_purpose(unsigned int gpio, pin_purpose_t purpose);
+
+
+/*
+ * 设置指定pin为第n复用
+ * @gpio gpio编号
+ * @remap 第n复用
+ */
+void pin_set_remap(unsigned int gpio, pin_remap_t remap);
+
+
+#endif
+
diff --git a/bsp/ls1bdev/libraries/ls1b_public.c b/bsp/ls1bdev/libraries/ls1b_public.c
new file mode 100644
index 0000000000..b48d59a851
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_public.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     勤为本       first version
+ * 2021-02-02     [email protected]       adapt to ls1b
+ */
+
+// 一些常用的、共用的接口
+
+/*
+ * 将指定寄存器的指定位置1
+ * @reg 寄存器地址
+ * @bit 需要置1的那一bit
+ */
+void reg_set_one_bit(volatile unsigned int *reg, unsigned int bit)
+{
+    unsigned int temp, mask;
+
+    mask = 1 << bit;
+    temp = *reg;
+    temp |= mask;
+    *reg = temp;
+
+    return ;
+}
+
+
+/*
+ * 将指定寄存器的指定位清零
+ * @reg 寄存器地址
+ * @bit 需要清零的那一bit
+ */
+void reg_clr_one_bit(volatile unsigned int *reg, unsigned int bit)
+{
+    unsigned int temp, mask;
+
+    mask = 1 << bit;
+    temp = *reg;
+    temp &= ~mask;
+    *reg = temp;
+
+    return ;
+}
+
+
+
+/*
+ * 获取指定寄存器的指定位的值
+ * @reg 寄存器地址
+ * @bit 需要读取值的那一bit
+ * @ret 指定位的值
+ */
+unsigned int reg_get_bit(volatile unsigned int *reg, unsigned int bit)
+{
+    unsigned int temp;
+
+    temp = *reg;
+    temp = (temp >> bit) & 1;
+
+    return temp;
+}
+
+
+/*
+ * 向寄存器中写入8bit(一个字节)数据
+ * @data 待写入的数据
+ * @addr 寄存器地址
+ */
+void reg_write_8(unsigned char data, volatile unsigned char *addr)
+{
+    *addr = data;
+}
+
+
+/*
+ * 从寄存器读出8bit(一个字节)数据
+ * @addr 寄存器地址
+ * @ret 读出的数据
+ */
+unsigned char reg_read_8(volatile unsigned char *addr)
+{
+    return (*addr);
+}
+
+
+/*
+ * 向寄存器中写一个32bit的数据
+ * @data 待写入的数据
+ * @addr 寄存器地址
+ */
+void reg_write_32(unsigned int data, volatile unsigned int *addr)
+{
+    *addr = data;
+}
+
+
+/*
+ * 从寄存器读出一个32bit数据
+ * @addr 寄存器地址
+ * @ret 读出的数据
+ */
+unsigned int reg_read_32(volatile unsigned int *addr)
+{
+    return (*addr);
+}
+
+
+
+/**
+ * ffs - find first bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+int ls1b_ffs(int x)
+{
+	int r = 1;
+
+	if (!x)
+		return 0;
+	if (!(x & 0xffff)) {
+		x >>= 16;
+		r += 16;
+	}
+	if (!(x & 0xff)) {
+		x >>= 8;
+		r += 8;
+	}
+	if (!(x & 0xf)) {
+		x >>= 4;
+		r += 4;
+	}
+	if (!(x & 3)) {
+		x >>= 2;
+		r += 2;
+	}
+	if (!(x & 1)) {
+		x >>= 1;
+		r += 1;
+	}
+	return r;
+}
+
+
+/*
+ * fls - find last (most-significant) bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+int ls1b_fls(int x)
+{
+    int r = 32;
+
+    if (!x)
+        return 0;
+    if (!(x & 0xffff0000u))
+    {
+        x <<= 16;
+        r -= 16;
+    }
+    if (!(x & 0xff000000u))
+    {
+        x <<= 8;
+        r -= 8;
+    }
+    if (!(x & 0xf0000000u))
+    {
+        x <<= 4;
+        r -= 4;
+    }
+    if (!(x & 0xc0000000u))
+    {
+        x <<= 2;
+        r -= 2;
+    }
+    if (!(x & 0x80000000u))
+    {
+        x <<= 1;
+        r -= 1;
+    }
+
+    return r;
+}
+
+
diff --git a/bsp/ls1bdev/libraries/ls1b_public.h b/bsp/ls1bdev/libraries/ls1b_public.h
new file mode 100644
index 0000000000..875f413062
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_public.h
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     勤为本       first version
+ */
+
+// 一些常用的、共用的接口
+
+#ifndef __LOONGSON_PUBLIC_H
+#define __LOONGSON_PUBLIC_H
+
+
+#include <stdio.h>
+
+
+// pmon提供的打印函数，见main()函数
+struct callvectors {
+	int     (*open) (char *, int, int);
+	int     (*close) (int);
+	int     (*read) (int, void *, int);
+	int     (*write) (int, void *, int);
+	long long   (*lseek) (int, long long, int);
+	int     (*printf) (const char *, ...);
+	void    (*cacheflush) (void);
+	char    *(*gets) (char *);
+};
+#define	myprintf (*callvec->printf)
+#define	mygets   (*callvec->gets)
+extern struct callvectors *callvec;
+
+
+#define MIN(a, b)           ((a) > (b) ? (b) : (a))
+#define MAX(a, b)           ((a) > (b) ? (a) : (b))
+
+#define DIV_ROUND_UP(n, d)      (((n) + (d) - 1) / (d))
+
+typedef enum
+{
+    FALSE=0, 
+    TRUE=1
+}BOOL;
+
+/*
+ * 将指定寄存器的指定位置1
+ * @reg 寄存器地址
+ * @bit 需要置1的那一bit
+ */
+void reg_set_one_bit(volatile unsigned int *reg, unsigned int bit);
+
+
+/*
+ * 将指定寄存器的指定位清零
+ * @reg 寄存器地址
+ * @bit 需要清零的那一bit
+ */
+void reg_clr_one_bit(volatile unsigned int *reg, unsigned int bit);
+
+
+/*
+ * 获取指定寄存器的指定位的值
+ * @reg 寄存器地址
+ * @bit 需要读取值的那一bit
+ * @ret 指定位的值
+ */
+unsigned int reg_get_bit(volatile unsigned int *reg, unsigned int bit);
+
+
+/*
+ * 向寄存器中写入8bit(一个字节)数据
+ * @data 待写入的数据
+ * @addr 寄存器地址
+ */
+void reg_write_8(unsigned char data, volatile unsigned char *addr);
+
+
+/*
+ * 从寄存器读出8bit(一个字节)数据
+ * @addr 寄存器地址
+ * @ret 读出的数据
+ */
+unsigned char reg_read_8(volatile unsigned char *addr);
+
+
+/*
+ * 向寄存器中写一个32bit的数据
+ * @data 待写入的数据
+ * @addr 寄存器地址
+ */
+void reg_write_32(unsigned int data, volatile unsigned int *addr);
+
+
+/*
+ * 从寄存器读出一个32bit数据
+ * @addr 寄存器地址
+ * @ret 读出的数据
+ */
+unsigned int reg_read_32(volatile unsigned int *addr);
+
+
+/**
+ * ffs - find first bit set
+ * @x: the word to search
+ */
+int ls1b_ffs(int x);
+
+/*
+ * fls - find last (most-significant) bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+int ls1b_fls(int x);
+
+
+#endif
+
diff --git a/bsp/ls1bdev/libraries/ls1b_regs.h b/bsp/ls1bdev/libraries/ls1b_regs.h
new file mode 100644
index 0000000000..6dad9c29bb
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_regs.h
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-09-06     勤为本       first version
+ * 2021-02-02     [email protected]       adapt to ls1b
+ */
+
+// 龙芯1b外设寄存器
+
+
+#ifndef __LOONGSON_LS1B_REGS_H
+#define __LOONGSON_LS1B_REGS_H
+
+
+
+
+// 时钟相关寄存器地址
+#define LS1B_START_FREQ                     (0xbfe78030)
+#define LS1B_CLK_DIV_PARAM                  (0xbfe78034)
+
+
+// gpio相关寄存器地址
+#define LS1B_GPIO_CFG0                      (0xbfd010c0)
+#define LS1B_GPIO_EN0                       (0xbfd010d0)
+#define LS1B_GPIO_IN0                       (0xbfd010e0)
+#define LS1B_GPIO_OUT0                      (0xbfd010f0)
+
+#define LS1B_GPIO_CFG1                      (0xbfd010c4)
+#define LS1B_GPIO_EN1                       (0xbfd010d4)
+#define LS1B_GPIO_IN1                       (0xbfd010e4)
+#define LS1B_GPIO_OUT1                      (0xbfd010f4)
+
+
+
+// 复用相关寄存器
+#define LS1B_CBUS_FIRST0                    (0xbfd011c0)
+#define LS1B_CBUS_SECOND0                   (0xbfd011d0)
+#define LS1B_CBUS_THIRD0                    (0xbfd011e0)
+#define LS1B_CBUS_FOURTH0                   (0xbfd011f0)
+#define LS1B_CBUS_FIFTH0                    (0xbfd01200)
+
+#define LS1B_CBUS_FIRST1                    (0xbfd011c4)
+#define LS1B_CBUS_SECOND1                   (0xbfd011d4)
+#define LS1B_CBUS_THIRD1                    (0xbfd011e4)
+#define LS1B_CBUS_FOURTH1                   (0xbfd011f4)
+#define LS1B_CBUS_FIFTH1                    (0xbfd01204)
+
+#define LS1B_CBUS_FIRST2                    (0xbfd011c8)
+#define LS1B_CBUS_SECOND2                   (0xbfd011d8)
+#define LS1B_CBUS_THIRD2                    (0xbfd011e8)
+#define LS1B_CBUS_FOURTH2                   (0xbfd011f8)
+#define LS1B_CBUS_FIFTH2                    (0xbfd01208)
+
+#define LS1B_CBUS_FIRST3                    (0xbfd011cc)
+#define LS1B_CBUS_SECOND3                   (0xbfd011dc)
+#define LS1B_CBUS_THIRD3                    (0xbfd011ec)
+#define LS1B_CBUS_FOURTH3                   (0xbfd011fc)
+#define LS1B_CBUS_FIFTH3                    (0xbfd0120c)
+
+
+// PWM寄存器偏移
+#define LS1B_PWM_CNTR                       (0x0)
+#define LS1B_PWM_HRC                        (0x4)
+#define LS1B_PWM_LRC                        (0x8)
+#define LS1B_PWM_CTRL                       (0xC)
+// PWM基地址
+#define LS1B_REG_BASE_PWM0                  (0xbfe5c000)
+#define LS1B_REG_BASE_PWM1                  (0xbfe5c010)
+#define LS1B_REG_BASE_PWM2                  (0xbfe5c020)
+#define LS1B_REG_BASE_PWM3                  (0xbfe5c030)
+
+//CAN基地址
+#define  LS1B_REG_BASE_CAN0				    (0xbfe50000)
+#define  LS1B_REG_BASE_CAN1					(0xbfe54000)
+
+// 中断配置寄存器
+#define LS1B_INT0_SR                        (0xbfd01040)
+#define LS1B_INT0_EN                        (0xbfd01044)
+#define LS1B_INT0_SET                       (0xbfd01048)
+#define LS1B_INT0_CLR                       (0xbfd0104c)
+#define LS1B_INT0_POL                       (0xbfd01050)
+#define LS1B_INT0_EDGE                      (0xbfd01054)
+
+#define LS1B_INT1_SR                        (0xbfd01058)
+#define LS1B_INT1_EN                        (0xbfd0105c)
+#define LS1B_INT1_SET                       (0xbfd01060)
+#define LS1B_INT1_CLR                       (0xbfd01064)
+#define LS1B_INT1_POL                       (0xbfd01068)
+#define LS1B_INT1_EDGE                      (0xbfd0106c)
+
+#define LS1B_INT2_SR                        (0xbfd01070)
+#define LS1B_INT2_EN                        (0xbfd01074)
+#define LS1B_INT2_SET                       (0xbfd01078)
+#define LS1B_INT2_CLR                       (0xbfd0107c)
+#define LS1B_INT2_POL                       (0xbfd01080)
+#define LS1B_INT2_EDGE                      (0xbfd01084)
+
+#define LS1B_INT3_SR                        (0xbfd01088)
+#define LS1B_INT3_EN                        (0xbfd0108c)
+#define LS1B_INT3_SET                       (0xbfd01090)
+#define LS1B_INT3_CLR                       (0xbfd01094)
+#define LS1B_INT3_POL                       (0xbfd01098)
+#define LS1B_INT3_EDGE                      (0xbfd0109c)
+
+#define LS1B_INT4_SR                        (0xbfd010a0)
+#define LS1B_INT4_EN                        (0xbfd010a4)
+#define LS1B_INT4_SET                       (0xbfd010a8)
+#define LS1B_INT4_CLR                       (0xbfd010ac)
+#define LS1B_INT4_POL                       (0xbfd010b0)
+#define LS1B_INT4_EDGE                      (0xbfd010b4)
+
+
+// I2C寄存器
+#define LS1B_I2C0_BASE                      (0xbfe58000)
+#define LS1B_I2C1_BASE                      (0xbfe68000)
+#define LS1B_I2C2_BASE                      (0xbfe70000)
+
+
+// SPI寄存器
+#define LS1B_SPI0_BASE                      (0xbfe80000)
+#define LS1B_SPI1_BASE                      (0xbfec0000)
+
+
+// 串口寄存器
+#define LS1B_UART00_BASE                    (0xbfe40000)
+#define LS1B_UART01_BASE                    (0xbfe41000)
+#define LS1B_UART1_BASE                     (0xbfe44000)
+#define LS1B_UART2_BASE                     (0xbfe48000)
+#define LS1B_UART3_BASE                     (0xbfe4c000)
+#define LS1B_UART4_BASE                     (0xbfe6c000)
+#define LS1B_UART5_BASE                     (0xbfe7c000)
+#define LS1B_UART6_BASE                     (0xbfe41000)
+#define LS1B_UART7_BASE                     (0xbfe42000)
+#define LS1B_UART8_BASE                     (0xbfe43000)
+#define LS1B_UART9_BASE                     (0xbfe45000)
+#define LS1B_UART10_BASE                    (0xbfe46000)
+#define LS1B_UART11_BASE                    (0xbfe47000)
+
+//RTC寄存器
+#define LS1B_RTC_BASE                       (0xbfe64024)
+
+
+#endif
+
diff --git a/bsp/ls1bdev/libraries/ls1b_uart.c b/bsp/ls1bdev/libraries/ls1b_uart.c
new file mode 100644
index 0000000000..73d88438f5
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_uart.c
@@ -0,0 +1,251 @@
+ /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-02-02   [email protected]   adapt to ls1b
+ */
+// 串口相关源码
+
+#include <stdio.h>
+#include <stdarg.h>
+#include "ls1b_public.h"
+#include "ls1b_regs.h"
+#include "ls1b_pin.h"
+#include "ls1b_uart.h"
+#include "ls1b_clock.h"
+#include "ls1b.h"
+
+
+// 串口线路状态寄存器的位域
+#define LS1B_UART_LSR_TE                (1 << 6)
+#define LS1B_UART_LSR_TFE               (1 << 5)
+
+
+// 打印缓存的大小
+#define LS1B_UART_PRINT_BUF_SIZE        (256)
+
+
+// 调试串口信息
+ls1b_uart_info_t debug_uart_info = {0};
+
+
+/*
+ * 获取指定串口模块的基地址
+ * @UARTx 串口编号
+ * @ret 基地址
+ */
+void *uart_get_base(ls1b_uart_t UARTx)
+{
+    void *base = NULL;
+
+    switch (UARTx)
+    {
+        case LS1B_UART00:
+            base = (void *)LS1B_UART00_BASE;
+            break;
+        case LS1B_UART01:
+            base = (void *)LS1B_UART01_BASE;
+            break;
+
+        case LS1B_UART1:
+            base = (void *)LS1B_UART1_BASE;
+            break;
+        
+        case LS1B_UART2:
+            base = (void *)LS1B_UART2_BASE;
+            break;
+
+        case LS1B_UART3:
+            base = (void *)LS1B_UART3_BASE;
+            break;
+        
+        case LS1B_UART4:
+            base = (void *)LS1B_UART4_BASE;
+            break;
+
+        case LS1B_UART5:
+            base = (void *)LS1B_UART5_BASE;
+            break;
+
+        case LS1B_UART6:
+            base = (void *)LS1B_UART6_BASE;
+            break;
+
+        case LS1B_UART7:
+            base = (void *)LS1B_UART7_BASE;
+            break;
+
+        case LS1B_UART8:
+            base = (void *)LS1B_UART8_BASE;
+            break;
+
+        case LS1B_UART9:
+            base = (void *)LS1B_UART9_BASE;
+            break;
+
+        case LS1B_UART10:
+            base = (void *)LS1B_UART10_BASE;
+            break;
+
+        case LS1B_UART11:
+            base = (void *)LS1B_UART11_BASE;
+            break;
+
+        default:
+            break;
+    }
+
+    return base;
+}
+
+
+/*
+ * 初始化指定的串口模块
+ * @uart_info_p 串口模块信息
+ */
+void uart_init(ls1b_uart_info_t *uart_info_p)
+{
+    void *uart_base = uart_get_base(uart_info_p->UARTx);
+    unsigned long baudrate_div = 0;
+
+    // 禁止所有中断
+    reg_write_8(0,      uart_base + LS1B_UART_IER_OFFSET);
+
+    // 接收FIFO的中断申请Trigger为14字节，清空发送和接收FIFO，并复位
+    reg_write_8(0xc3,   uart_base + LS1B_UART_FCR_OFFSET);
+
+    // 设置波特率
+    reg_write_8(0x80,   uart_base + LS1B_UART_LCR_OFFSET);
+    baudrate_div = clk_get_apb_rate() / 16 / uart_info_p->baudrate;
+    reg_write_8((baudrate_div >> 8) & 0xff, uart_base + LS1B_UART_MSB_OFFSET);
+    reg_write_8(baudrate_div & 0xff,        uart_base + LS1B_UART_LSB_OFFSET);
+
+    // 8个数据位，1个停止位，无校验
+    reg_write_8(0x03,   uart_base + LS1B_UART_LCR_OFFSET);
+
+    // 使能接收中断
+    if (TRUE == uart_info_p->rx_enable)
+    {
+        reg_write_8(IER_IRxE|IER_ILE , uart_base + LS1B_UART_IER_OFFSET);
+    }
+
+    return ;
+}
+
+
+/*
+ * 判断FIFO是否为空
+ * @uartx 串口号
+ * @ret TRUE or FALSE
+ */
+BOOL uart_is_transmit_empty(ls1b_uart_t uartx)
+{
+    void *uart_base = uart_get_base(uartx);
+    unsigned char status = reg_read_8(uart_base + LS1B_UART_LSR_OFFSET);
+
+    if (status & (LS1B_UART_LSR_TE | LS1B_UART_LSR_TFE))
+    {
+        return TRUE;
+    }
+    else
+    {
+        return FALSE;
+    }
+}
+
+
+/*
+ * 发送一个字节
+ * @uartx 串口号
+ * @ch 待发送的字符串
+ */
+void uart_putc(ls1b_uart_t uartx, unsigned char ch)
+{
+    void *uart_base = uart_get_base(uartx);
+    
+    // 等待
+    while (FALSE == uart_is_transmit_empty(uartx))
+        ;
+
+    // 发送
+    reg_write_8(ch, uart_base + LS1B_UART_DAT_OFFSET);
+
+    return ;
+}
+
+
+/*
+ * 打印一个字符串到指定串口
+ * @uartx 串口号
+ * @str 待打印的字符串
+ */
+void uart_print(ls1b_uart_t uartx, const char *str)
+{
+    while ('\0' != *str)                // 判断是否为字符串结束符
+    {
+        uart_putc(uartx, *str);   // 发送一个字符
+        str++;
+    }
+
+    return ;
+}
+
+
+/*
+ * 初始化串口2
+ */
+void uart2_init(void)
+{
+    unsigned int tx_gpio = 37;
+    unsigned int rx_gpio = 36;
+
+    // 设置复用
+    pin_set_remap(tx_gpio, PIN_REMAP_SECOND);
+    pin_set_remap(rx_gpio, PIN_REMAP_SECOND);
+    
+    // 初始化相关寄存器
+    debug_uart_info.UARTx = LS1B_UART2;
+    debug_uart_info.baudrate = 115200;
+    debug_uart_info.rx_enable = FALSE;  // 调试串口只需要打印(发送)功能，不需要接收功能
+    uart_init(&debug_uart_info);
+
+    return ;
+}
+
+
+/*
+ * 在串口2上打印字符串
+ * @str 待打印的字符串
+ */
+void uart2_print(const char *str)
+{
+    uart_print(LS1B_UART2, str);
+    return ;
+}
+
+
+/*
+ * 在调试串口打印字符串
+ * @str 待打印的字符串
+ */
+void uart_debug_print(const char *str)
+{
+    uart_print(debug_uart_info.UARTx, str);
+    return ;
+}
+
+
+/*
+ * 在调试串口打印一个字符
+ * @ch 待打印的字符
+ */
+void uart_debug_putc(unsigned char ch)
+{
+    uart_putc(debug_uart_info.UARTx, ch);
+    return ;
+}
+
+
diff --git a/bsp/ls1bdev/libraries/ls1b_uart.h b/bsp/ls1bdev/libraries/ls1b_uart.h
new file mode 100644
index 0000000000..88ee2793ad
--- /dev/null
+++ b/bsp/ls1bdev/libraries/ls1b_uart.h
@@ -0,0 +1,181 @@
+ /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-02-02   [email protected]	adapt to ls1b
+ */
+// 串口相关头文件
+
+
+#ifndef __LOONGSON_UART_H
+#define __LOONGSON_UART_H
+
+
+#include "ls1b_public.h"
+
+
+// 串口各寄存器相对基地址的偏移
+#define LS1B_UART_DAT_OFFSET            (0)
+#define LS1B_UART_IER_OFFSET            (1)
+#define LS1B_UART_IIR_OFFSET            (2)
+#define LS1B_UART_FCR_OFFSET            (2)
+#define LS1B_UART_LCR_OFFSET            (3)
+#define LS1B_UART_MCR_OFFSET            (4)
+#define LS1B_UART_LSR_OFFSET            (5)
+#define LS1B_UART_MSR_OFFSET            (6)
+
+#define LS1B_UART_LSB_OFFSET            (0)     // 分频锁存器1
+#define LS1B_UART_MSB_OFFSET            (1)     // 分频锁存器2
+
+/* interrupt enable register */
+#define	IER_IRxE	0x1	/* 接收有效数据中断使能 */
+#define	IER_ITxE	0x2	/* 传输保存寄存器为空中断使能 */
+#define	IER_ILE	    0x4	/* 接收器线路状态中断使能 */
+#define	IER_IME	    0x8	/* Modem状态中断使能 */
+
+/* interrupt identification register */
+#define	IIR_IMASK	0xf	/* mask */
+#define	IIR_RXTOUT	0xc	/* receive timeout */
+#define	IIR_RLS		0x6	/* receive line status */
+#define	IIR_RXRDY	0x4	/* receive ready */
+#define	IIR_TXRDY	0x2	/* transmit ready */
+#define	IIR_NOPEND	0x1	/* nothing */
+#define	IIR_MLSC	0x0	/* modem status */
+#define	IIR_FIFO_MASK	0xc0	/* set if FIFOs are enabled */
+
+/* fifo control register */
+#define	FIFO_ENABLE		0x01	/* enable fifo */
+#define	FIFO_RCV_RST	0x02	/* reset receive fifo */
+#define	FIFO_XMT_RST	0x04	/* reset transmit fifo */
+#define	FIFO_DMA_MODE	0x08	/* enable dma mode */
+#define	FIFO_TRIGGER_1	0x00	/* trigger at 1 char */
+#define	FIFO_TRIGGER_4	0x40	/* trigger at 4 chars */
+#define	FIFO_TRIGGER_8	0x80	/* trigger at 8 chars */
+#define	FIFO_TRIGGER_14	0xc0	/* trigger at 14 chars */
+
+// 线路控制寄存器
+/* character format control register */
+#define	CFCR_DLAB	0x80	/* divisor latch */
+#define	CFCR_SBREAK	0x40	/* send break */
+#define	CFCR_PZERO	0x30	/* zero parity */
+#define	CFCR_PONE	0x20	/* one parity */
+#define	CFCR_PEVEN	0x10	/* even parity */
+#define	CFCR_PODD	0x00	/* odd parity */
+#define	CFCR_PENAB	0x08	/* parity enable */
+#define	CFCR_STOPB	0x04	/* 2 stop bits */
+#define	CFCR_8BITS	0x03	/* 8 data bits */
+#define	CFCR_7BITS	0x02	/* 7 data bits */
+#define	CFCR_6BITS	0x01	/* 6 data bits */
+#define	CFCR_5BITS	0x00	/* 5 data bits */
+
+/* modem control register */
+#define	MCR_LOOPBACK	0x10	/* loopback */
+#define	MCR_IENABLE	0x08	/* output 2 = int enable */
+#define	MCR_DRS		0x04	/* output 1 = xxx */
+#define	MCR_RTS		0x02	/* enable RTS */
+#define	MCR_DTR		0x01	/* enable DTR */
+
+/* line status register */
+#define	LSR_RCV_FIFO	0x80	/* error in receive fifo */
+#define	LSR_TSRE	0x40	/* transmitter empty */
+#define	LSR_TXRDY	0x20	/* transmitter ready */
+#define	LSR_BI		0x10	/* break detected */
+#define	LSR_FE		0x08	/* framing error */
+#define	LSR_PE		0x04	/* parity error */
+#define	LSR_OE		0x02	/* overrun error */
+#define	LSR_RXRDY	0x01	/* receiver ready */
+#define	LSR_RCV_MASK	0x1f
+
+
+// 串口模块编号
+typedef enum
+{
+    LS1B_UART00 = 0,        // 全功能串口UART0可以分为两个四线串口UART00和UART01
+    LS1B_UART01,
+    LS1B_UART1,
+    LS1B_UART2,
+    LS1B_UART3,
+    LS1B_UART4,
+    LS1B_UART5,
+    LS1B_UART6,
+    LS1B_UART7,
+    LS1B_UART8,
+    LS1B_UART9,
+    LS1B_UART10,
+    LS1B_UART11
+}ls1b_uart_t;
+
+
+// 串口信息
+typedef struct
+{
+    ls1b_uart_t UARTx;              // 串口模块编号
+    unsigned int baudrate;          // 波特率
+    BOOL rx_enable;                 // 是否需要使用串口接收数据(使能接收中断)，发送默认使能
+}ls1b_uart_info_t;
+
+
+
+/*
+ * 获取指定串口模块的基地址
+ * @UARTx 串口编号
+ * @ret 基地址
+ */
+void *uart_get_base(ls1b_uart_t UARTx);
+
+
+/*
+ * 初始化指定的串口模块
+ * @uart_info_p 串口模块信息
+ */
+void uart_init(ls1b_uart_info_t *uart_info_p);
+
+
+/*
+ * 初始化串口2
+ */
+void uart2_init(void);
+
+
+/*
+ * 在串口2上打印字符串
+ * @str 待打印的字符串
+ */
+void uart2_print(const char *str);
+
+
+/*
+ * 在调试串口打印字符串
+ * @str 待打印的字符串
+ */
+void uart_debug_print(const char *str);
+
+
+/*
+ * 在调试串口打印一个字符
+ * @ch 待打印的字符
+ */
+void uart_debug_putc(unsigned char ch);
+
+
+/*
+ * 发送一个字节
+ * @uartx 串口号
+ * @ch 待发送的字符串
+ */
+void uart_putc(ls1b_uart_t uartx, unsigned char ch);
+
+
+/*
+ * 打印一个字符串到指定串口
+ * @uartx 串口号
+ * @str 待打印的字符串
+ */
+void uart_print(ls1b_uart_t uartx, const char *str);
+
+
+#endif
+
diff --git a/bsp/ls1bdev/rtconfig.h b/bsp/ls1bdev/rtconfig.h
index 882d74b4d7..aede85d795 100644
--- a/bsp/ls1bdev/rtconfig.h
+++ b/bsp/ls1bdev/rtconfig.h
@@ -10,15 +10,12 @@
 #define RT_ALIGN_SIZE 4
 #define RT_THREAD_PRIORITY_32
 #define RT_THREAD_PRIORITY_MAX 32
-#define RT_TICK_PER_SECOND 100
+#define RT_TICK_PER_SECOND 1000
 #define RT_USING_OVERFLOW_CHECK
 #define RT_USING_HOOK
 #define RT_USING_IDLE_HOOK
 #define RT_IDLE_HOOK_LIST_SIZE 4
-#define IDLE_THREAD_STACK_SIZE 256
-#define RT_USING_TIMER_SOFT
-#define RT_TIMER_THREAD_PRIO 4
-#define RT_TIMER_THREAD_STACK_SIZE 512
+#define IDLE_THREAD_STACK_SIZE 1024
 #define RT_DEBUG
 
 /* Inter-Thread communication */
@@ -40,8 +37,8 @@
 #define RT_USING_DEVICE
 #define RT_USING_CONSOLE
 #define RT_CONSOLEBUF_SIZE 128
-#define RT_CONSOLE_DEVICE_NAME "uart"
-#define RT_VER_NUM 0x40002
+#define RT_CONSOLE_DEVICE_NAME "uart5"
+#define RT_VER_NUM 0x40003
 
 /* RT-Thread Components */
 
@@ -114,9 +111,6 @@
 /* Utilities */
 
 
-/* RT-Thread MIPS CPU */
-
-
 /* RT-Thread online packages */
 
 /* IoT - internet of things */
@@ -157,7 +151,9 @@
 /* samples: kernel and components samples */
 
 #define SOC_LS1B
-#define RT_USING_UART0
+#define RT_MEM_SIZE 256
+#define RT_OSC_CLK 25000000
+#define RT_USING_UART5
 #define RT_UART_RX_BUFFER_SIZE 64
 
 #endif
diff --git a/bsp/ls1bdev/rtconfig.py b/bsp/ls1bdev/rtconfig.py
index a2c78a926a..0d76e27348 100644
--- a/bsp/ls1bdev/rtconfig.py
+++ b/bsp/ls1bdev/rtconfig.py
@@ -36,7 +36,7 @@ OBJDUMP = PREFIX + 'objdump'
 OBJCPY = PREFIX + 'objcopy'
 READELF = PREFIX + 'readelf'
 
-DEVICE = ' -mips32r2'
+DEVICE = ' -mips32 -msoft-float -mfp32'
 CFLAGS = DEVICE + ' -EL -G0 -mno-abicalls -fno-pic -fno-builtin -fno-exceptions -ffunction-sections -fomit-frame-pointer'
 AFLAGS = ' -c' + DEVICE + ' -EL -fno-pic -fno-builtin -mno-abicalls -x assembler-with-cpp'
 LFLAGS = DEVICE + ' -nostartfiles -EL -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T ls1b_ram.lds'