[原创] 【瑞萨RA8D1评测】第六篇：UART通讯控制LED亮灭

eew_cT3H5d 发表于 2024-8-4 00:07

<div class='showpostmsg'> 本帖最后由 eew_cT3H5d 于 2024-8-4 23:02 编辑

先看效果：RA8D1发送“HELLO eeworld”，同时若接收到串口调试软件发送指令进行亮灭LED灯

<div style="text-align: left;"></div>

 

因JLINK自带烧写和调试串口，刚好链接开发板的uart3，所以需要使能开发板的uart3就可以直接通过JLINK的USB直接与电脑进行通讯

系统框图如下：

  

 

使能串口uart3

        

 

核对串口使能引脚

  

 

配置时钟

  

 

串口处理函数

  

debug_uart3c

<pre>
<code>#include <debug_uart3.h>

void Debug_UART3_Init(void)
{
fsp_err_t err = FSP_SUCCESS;

err = R_SCI_B_UART_Open (&g_uart3_ctrl, &g_uart3_cfg);
assert(FSP_SUCCESS == err);
}

uint8_t uart_send_complete_flag = 0;

void debug_uart3_callback (uart_callback_args_t * p_args)
{
switch (p_args->event)
{
 case UART_EVENT_RX_CHAR:
 {
 switch (p_args->data)
 {
 case '1':
 R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_10_PIN_01, BSP_IO_LEVEL_LOW);;
 break;
 case '2':
 R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_10_PIN_01, BSP_IO_LEVEL_HIGH);
 break;
 default:
 break;
 }
 break;
 }
 case UART_EVENT_TX_COMPLETE:
 {
 uart_send_complete_flag = 1;
 break;
 }

 default:
 break;
}
}
</code></pre>

 

串口头文件

  

debug_uart3.h

<pre>
<code>#ifndef _DEBUG_UART3_H
#define _DEBUG_UART3_H
#include "hal_data.h"
#include "stdio.h"

void Debug_UART3_Init(void);

#endif
</code></pre>

print函数构建

  

printf_redirect.c

<pre>
<code>#include "hal_data.h"
#include "stdio.h"
#include <sys/stat.h>
#include <errno.h>
#undef errno
extern int errno;

int _write(int file, char *ptr, int len);
int _close(int file);
int _fstat(int file, struct stat *st);
int _isatty(int file);
int _read(int file, char *ptr, int len);
int _lseek(int file, int ptr, int dir);

#define DEBUG_SERIAL_TIMEOUT 2000/portTICK_PERIOD_MS

extern uint8_t uart_send_complete_flag;

int _write(int file, char *ptr, int len)
{
fsp_err_t err = FSP_SUCCESS;
FSP_PARAMETER_NOT_USED(file);

static bool uart_open = false;

if (false == uart_open)
{
 err = R_SCI_B_UART_Open(&g_uart3_ctrl, &g_uart3_cfg);
}

if (FSP_SUCCESS == err)
{
 err = R_SCI_B_UART_Write(&g_uart3_ctrl, (uint8_t *)ptr, (uint32_t)len);
}

if (FSP_SUCCESS != err)
{
 len = -1;
}

while(uart_send_complete_flag == 0)
{
 R_BSP_SoftwareDelay(10, BSP_DELAY_UNITS_MILLISECONDS);
}
uart_send_complete_flag = 0;

return len;
}

int _close(int file)
{
FSP_PARAMETER_NOT_USED(file);
return -1;
}
int _fstat(int file, struct stat *st)
{
FSP_PARAMETER_NOT_USED(file);
st->st_mode = S_IFCHR;
return 0;
}

int _isatty(int file)
{
FSP_PARAMETER_NOT_USED(file);
return 1;
}

int _lseek(int file, int ptr, int dir)
{
FSP_PARAMETER_NOT_USED(file);
FSP_PARAMETER_NOT_USED(ptr);
FSP_PARAMETER_NOT_USED(dir);
return 0;
}

int _read(int file, char *ptr, int len)
{
FSP_PARAMETER_NOT_USED(file);
FSP_PARAMETER_NOT_USED(ptr);
FSP_PARAMETER_NOT_USED(len);
return 0;
}
</code></pre>

主程序hal_entry.c

  hal_entry.c

<pre>
<code>#include "hal_data.h"

#include "debug_uart3.h"

fsp_err_t err;

void R_BSP_WarmStart(bsp_warm_start_event_t event);

//extern bsp_leds_t g_bsp_leds;

/*******************************************************************************************************************//**
* <a href="home.php?mod=space&uid=159083" target="_blank">@brief </a>Blinky example application
*
* Blinks all leds at a rate of 1 second using the software delay function provided by the BSP.
*
**********************************************************************************************************************/
void hal_entry (void)
{

Debug_UART3_Init();
while (1)
{
 printf("HELL eeworld !\r\n");
 R_BSP_SoftwareDelay(1, BSP_DELAY_UNITS_SECONDS); //延时1秒
}
}

/*******************************************************************************************************************//**
* This function is called at various points during the startup process.This implementation uses the event that is
* called right before main() to set up the pins.
*
* @paramevent Where at in the start up process the code is currently at
**********************************************************************************************************************/
void R_BSP_WarmStart (bsp_warm_start_event_t event)
{
if (BSP_WARM_START_RESET == event)
{
#if BSP_FEATURE_FLASH_LP_VERSION != 0

 /* Enable reading from data flash. */
 R_FACI_LP->DFLCTL = 1U;

 /* Would normally have to wait tDSTOP(6us) for data flash recovery. Placing the enable here, before clock and
 * C runtime initialization, should negate the need for a delay since the initialization will typically take more than 6us. */
#endif
}

if (BSP_WARM_START_POST_C == event)
{
 /* C runtime environment and system clocks are setup. */

 /* Configure pins. */
 R_IOPORT_Open(&IOPORT_CFG_CTRL, &IOPORT_CFG_NAME);
}
}
</code></pre>

 

 

程序框架：  

 

 

 
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eew_cT3H5d 发表于 2024-8-4 23:07

参考来源:https://m.eeworld.com.cn/bbs/forum.php?mod=viewthread&tid=1289361

通途科技 发表于 2024-10-20 20:23

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[原创] 【瑞萨RA8D1评测】第六篇：UART通讯控制LED亮灭