Merge pull request #18 from RT-Thread/master

pr

12 files changed, 1638 insertions, 0 deletions

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
+