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-rw-r--r--bsp/ls1cdev/libraries/ls1c_regs.h13
-rw-r--r--bsp/ls1cdev/libraries/ls1c_uart.c316
-rw-r--r--bsp/ls1cdev/libraries/ls1c_uart.h180
3 files changed, 508 insertions, 1 deletions
diff --git a/bsp/ls1cdev/libraries/ls1c_regs.h b/bsp/ls1cdev/libraries/ls1c_regs.h
index 630b45ccbe..1f8b60ed17 100644
--- a/bsp/ls1cdev/libraries/ls1c_regs.h
+++ b/bsp/ls1cdev/libraries/ls1c_regs.h
@@ -125,9 +125,20 @@
// 串口寄存器
-#define LS1C_UART0_BASE (0xbfe40000)
+#define LS1C_UART00_BASE (0xbfe40000)
+#define LS1C_UART01_BASE (0xbfe41000)
#define LS1C_UART1_BASE (0xbfe44000)
#define LS1C_UART2_BASE (0xbfe48000)
+#define LS1C_UART3_BASE (0xbfe4c000)
+#define LS1C_UART4_BASE (0xbfe4c400)
+#define LS1C_UART5_BASE (0xbfe4c500)
+#define LS1C_UART6_BASE (0xbfe4c600)
+#define LS1C_UART7_BASE (0xbfe4c700)
+#define LS1C_UART8_BASE (0xbfe4c800)
+#define LS1C_UART9_BASE (0xbfe4c900)
+#define LS1C_UART10_BASE (0xbfe4ca00)
+#define LS1C_UART11_BASE (0xbfe4cb00)
+
#endif
diff --git a/bsp/ls1cdev/libraries/ls1c_uart.c b/bsp/ls1cdev/libraries/ls1c_uart.c
new file mode 100644
index 0000000000..baa3b6e3ac
--- /dev/null
+++ b/bsp/ls1cdev/libraries/ls1c_uart.c
@@ -0,0 +1,316 @@
+// 串口相关源码
+
+#include <stdio.h>
+#include <stdarg.h>
+#include "ls1c_public.h"
+#include "ls1c_regs.h"
+#include "ls1c_pin.h"
+#include "ls1c_uart.h"
+#include "ls1c_clock.h"
+#include "ls1c.h"
+
+
+// 串口线路状态寄存器的位域
+#define LS1C_UART_LSR_TE (1 << 6)
+#define LS1C_UART_LSR_TFE (1 << 5)
+
+
+// 打印缓存的大小
+#define LS1C_UART_PRINT_BUF_SIZE (256)
+
+
+// 调试串口信息
+ls1c_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(ls1c_uart_t UARTx)
+{
+ void *base = NULL;
+
+ switch (UARTx)
+ {
+ case LS1C_UART00:
+ base = (void *)LS1C_UART00_BASE;
+ break;
+ case LS1C_UART01:
+ base = (void *)LS1C_UART01_BASE;
+ break;
+
+ case LS1C_UART1:
+ base = (void *)LS1C_UART1_BASE;
+ break;
+
+ case LS1C_UART2:
+ base = (void *)LS1C_UART2_BASE;
+ break;
+
+ case LS1C_UART3:
+ base = (void *)LS1C_UART3_BASE;
+ break;
+
+ case LS1C_UART4:
+ base = (void *)LS1C_UART4_BASE;
+ break;
+
+ case LS1C_UART5:
+ base = (void *)LS1C_UART5_BASE;
+ break;
+
+ case LS1C_UART6:
+ base = (void *)LS1C_UART6_BASE;
+ break;
+
+ case LS1C_UART7:
+ base = (void *)LS1C_UART7_BASE;
+ break;
+
+ case LS1C_UART8:
+ base = (void *)LS1C_UART8_BASE;
+ break;
+
+ case LS1C_UART9:
+ base = (void *)LS1C_UART9_BASE;
+ break;
+
+ case LS1C_UART10:
+ base = (void *)LS1C_UART10_BASE;
+ break;
+
+ case LS1C_UART11:
+ base = (void *)LS1C_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(ls1c_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 + LS1C_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 + LS1C_UART_FCR_OFFSET);
+
+ // 设置波特率
+ reg_write_8(0x80, uart_base + LS1C_UART_LCR_OFFSET);
+ baudrate_div = clk_get_cpu_rate() / 16 / uart_info_p->baudrate / 2;
+ reg_write_8((baudrate_div >> 8) & 0xff, uart_base + LS1C_UART_MSB_OFFSET);
+ reg_write_8(baudrate_div & 0xff, uart_base + LS1C_UART_LSB_OFFSET);
+
+ // 8个数据位，1个停止位，无校验
+ reg_write_8(0x03, uart_base + LS1C_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 + LS1C_UART_IER_OFFSET);
+ }
+
+ return ;
+}
+
+
+/*
+ * 判断FIFO是否为空
+ * @uartx 串口号
+ * @ret TRUE or FALSE
+ */
+BOOL uart_is_transmit_empty(ls1c_uart_t uartx)
+{
+ void *uart_base = uart_get_base(uartx);
+ unsigned char status = reg_read_8(uart_base + LS1C_UART_LSR_OFFSET);
+
+ if (status & (LS1C_UART_LSR_TE | LS1C_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(ls1c_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 + LS1C_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(ls1c_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 = LS1C_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(LS1C_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 ;
+}
+
+
+/*
+ * 把中断号转换为串口号
+ * @IRQn 中断号
+ * @ret 串口号
+ */
+ls1c_uart_t uart_irqn_to_uartx(int IRQn)
+{
+ ls1c_uart_t uartx = LS1C_UART2;
+
+ switch (IRQn)
+ {
+ /* 串口UART00和UART01的中断号还待确定
+ case LS1C_UART00_IRQ:
+ uartx = LS1C_UART00;
+ break;
+
+ case LS1C_UART01_IRQ:
+ uartx = LS1C_UART01;
+ break;
+ */
+
+ case LS1C_UART1_IRQ:
+ uartx = LS1C_UART1;
+ break;
+
+ case LS1C_UART2_IRQ:
+ uartx = LS1C_UART2;
+ break;
+
+ case LS1C_UART3_IRQ:
+ uartx = LS1C_UART3;
+ break;
+
+ case LS1C_UART4_IRQ:
+ uartx = LS1C_UART4;
+ break;
+
+ case LS1C_UART5_IRQ:
+ uartx = LS1C_UART5;
+ break;
+
+ case LS1C_UART6_IRQ:
+ uartx = LS1C_UART6;
+ break;
+
+ case LS1C_UART7_IRQ:
+ uartx = LS1C_UART7;
+ break;
+
+ case LS1C_UART8_IRQ:
+ uartx = LS1C_UART8;
+ break;
+
+ case LS1C_UART9_IRQ:
+ uartx = LS1C_UART9;
+ break;
+
+ case LS1C_UART10_IRQ:
+ uartx = LS1C_UART10;
+ break;
+
+ case LS1C_UART11_IRQ:
+ uartx = LS1C_UART11;
+ break;
+
+ default:
+ uartx = LS1C_UART2;
+ break;
+ }
+
+ return uartx;
+}
+
+
diff --git a/bsp/ls1cdev/libraries/ls1c_uart.h b/bsp/ls1cdev/libraries/ls1c_uart.h
new file mode 100644
index 0000000000..7d63033684
--- /dev/null
+++ b/bsp/ls1cdev/libraries/ls1c_uart.h
@@ -0,0 +1,180 @@
+// 串口相关头文件
+
+
+#ifndef __OPENLOONGSON_UART_H
+#define __OPENLOONGSON_UART_H
+
+
+#include "ls1c_public.h"
+
+
+// 串口各寄存器相对基地址的偏移
+#define LS1C_UART_DAT_OFFSET (0)
+#define LS1C_UART_IER_OFFSET (1)
+#define LS1C_UART_IIR_OFFSET (2)
+#define LS1C_UART_FCR_OFFSET (2)
+#define LS1C_UART_LCR_OFFSET (3)
+#define LS1C_UART_MCR_OFFSET (4)
+#define LS1C_UART_LSR_OFFSET (5)
+#define LS1C_UART_MSR_OFFSET (6)
+
+#define LS1C_UART_LSB_OFFSET (0) // 分频锁存器1
+#define LS1C_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
+{
+ LS1C_UART00 = 0, // 全功能串口UART0可以分为两个四线串口UART00和UART01
+ LS1C_UART01,
+ LS1C_UART1,
+ LS1C_UART2,
+ LS1C_UART3,
+ LS1C_UART4,
+ LS1C_UART5,
+ LS1C_UART6,
+ LS1C_UART7,
+ LS1C_UART8,
+ LS1C_UART9,
+ LS1C_UART10,
+ LS1C_UART11
+}ls1c_uart_t;
+
+
+// 串口信息
+typedef struct
+{
+ ls1c_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
+}ls1c_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(ls1c_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(ls1c_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);
+
+
+/*
+ * 把中断号转换为串口号
+ * @IRQn 中断号
+ * @ret 串口号
+ */
+ls1c_uart_t uart_irqn_to_uartx(int IRQn);
+
+
+/*
+ * 发送一个字节
+ * @uartx 串口号
+ * @ch 待发送的字符串
+ */
+void uart_putc(ls1c_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(ls1c_uart_t uartx, const char *str);
+
+
+#endif
+
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