[经验]

【RA-Eco-RA6M4开发板评测】串口输出

TLLED

2025-7-27 10:43:50

1144 RA6M4 瑞萨电子

测试开发板的串口输出。

一、硬件部分

1.1、电路图部分
开发板上有USB转串口TTL部分，电路图如下：

1.2、手册部分资料
串口使用了P110和P109引脚，引脚对应的串口功能，对应的串口9。

二、配置串口

在RASC软件中配置串口。

2.1、配置串口9引脚

2.2、配置串口参数

三、程序部分

3.1、fun_uart.c

#include "hal_data.h"
#include "uart/fun_uart.h"


volatile bool uart9_send_complete_flag = false;

void init_uart(void)
{
	R_SCI_UART_Open (&g_uart9_ctrl, &g_uart9_cfg);
}

void g_uart9_callback(uart_callback_args_t *p_args)
{
	switch(p_args->event)
	{
		case UART_EVENT_RX_CHAR:
			R_SCI_UART_Write(&g_uart9_ctrl, (uint8_t *)&(p_args->data),1);
			break;
		
		case UART_EVENT_TX_COMPLETE:
			uart9_send_complete_flag=true;
			break;
		
		default:
			break;
	}
}

int fputc(int ch, FILE *f)
{
	(void)f;
	R_SCI_UART_Write(&g_uart9_ctrl, (uint8_t *)&ch, 1);
	while(uart9_send_complete_flag == false);
	uart9_send_complete_flag = false;

	return ch;
}

3.2、fun_uart.h

#ifndef FUN_UART_H_
#define FUN_UART_H_

#include <stdio.h>
void init_uart(void);
void senddat(int ch);

#endif

3.3、hal_entry.c

#include "hal_data.h"
#include "led/fun_led.h"
#include "uart/fun_uart.h"


FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER

/*******************************************************************************************************************//**
 * main() is generated by the RA Configuration editor and is used to generate threads if an RTOS is used.  This function
 * is called by main() when no RTOS is used.
 **********************************************************************************************************************/
void hal_entry(void)
{
    /* TODO: add your own code here */
	init_uart();
	init_led();
	
	while(1)
	{
		R_BSP_SoftwareDelay(500, BSP_DELAY_UNITS_MILLISECONDS);
		led1_on();
		led2_off();
		led3_on();
		R_BSP_SoftwareDelay(500, BSP_DELAY_UNITS_MILLISECONDS);
		led1_off();
		led2_on();
		led3_off();
		printf("RA6M4 Board UART9 TEST!\r\n");
	}

#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}

/*******************************************************************************************************************//**
 * 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.
 *
 * @param[in]  event    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);

#if BSP_CFG_SDRAM_ENABLED

        /* Setup SDRAM and initialize it. Must configure pins first. */
        R_BSP_SdramInit(true);
#endif
    }
}

#if BSP_TZ_SECURE_BUILD

FSP_CPP_HEADER
BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ();

/* Trustzone Secure Projects require at least one nonsecure callable function in order to build (Remove this if it is not required to build). */
BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable ()
{

}
FSP_CPP_FOOTER

#endif