[经验]

【RA-Eco-RA4M2开发板评测】串口打印

熊治坤

2025-5-29 18:38:09

1020 RA

开发板介绍

板子非常漂亮哦。

资源也很丰富：

1个复位按键
2个用户按键
2个触摸按键
3个LED
2个PMOD接口
板载USB转TTL模块，可用于串口通信和烧录
板载SWD接口，方便用户调试与下载
支持 TrustZone 的 100MHz Arm Cortex-M33
安全芯片的功能
512kB 闪存、64kB SRAM（支持奇偶校验）以及 64kB ECC SRAM
8KB 数据闪存，提供与 EEPROM 类似的数据存储功能
1kB 休眠用 SRAM
100 引脚封装
电容式触摸传感单元 (CTSU)
全速 USB 2.0，支持主机模式和设备模式
CAN 2.0B
四线 SPI
SCI（UART、简单 SPI、简单 I2C）
独立SPI/I2C 多主接口
SDHI 和 MMC

开发环境

采用e2stuio进行编码开发。
FSP非常好用，管脚配置方便。

代码实现

参考代码如下：

#include "hal_data.h"
#include <stdio.h>

FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER

fsp_err_t err = FSP_SUCCESS;
unsigned char send_buff[100];
volatile bool uart_send_complete_flag = false;
void user_uart_callback (uart_callback_args_t * p_args)
{
    if(p_args->event == UART_EVENT_TX_COMPLETE)
    {
        uart_send_complete_flag = true;
    }
}

#ifdef __GNUC__                                 //串口重定向
    #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
    #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif
PUTCHAR_PROTOTYPE
{
        err = R_SCI_UART_Write(&g_uart0_ctrl, (uint8_t *)&ch, 1);
        if(FSP_SUCCESS != err) __BKPT();
        while(uart_send_complete_flag == false){}
        uart_send_complete_flag = false;
        return ch;
}

int _write(int fd,char *pBuffer,int size)
{
    for(int i=0;i<size;i++)
    {
        __io_putchar(*pBuffer++);
    }
    return size;
}
void hal_entry(void)
{
    /* TODO: add your own code here */


    /* Open the transfer instance with initial configuration. */
    err = R_SCI_UART_Open(&g_uart0_ctrl, &g_uart0_cfg);
    assert(FSP_SUCCESS == err);
    unsigned char buff[]="RA E2STUDIO";
    uint8_t buff_len = strlen(buff);
    err = R_SCI_UART_Write(&g_uart0_ctrl, buff, buff_len);
    if(FSP_SUCCESS != err) __BKPT();
        while(uart_send_complete_flag == false){}
    uart_send_complete_flag = false;

    sprintf(send_buff, "\nHello World!.\n");
    uint8_t len = strlen(send_buff);

    err = R_SCI_UART_Write(&g_uart0_ctrl, send_buff, len);
    if(FSP_SUCCESS != err) __BKPT();
        while(uart_send_complete_flag == false){}
    uart_send_complete_flag = false;

    memset(send_buff, '\0', sizeof(100));
       int int_i=55;
       float float_i=66.20f;
       char char_i[]="hello e2studio";
       while(1)
       {

           printf("int_i=%d\n",int_i);
           printf("float_i=%.2f\n",float_i);
           printf("char_i='%s'\n",char_i);
           R_BSP_SoftwareDelay(1000, BSP_DELAY_UNITS_MILLISECONDS); // NOLINT100->160
       }
#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 (&g_ioport_ctrl, g_ioport.p_cfg);
    }
}

#if BSP_TZ_SECURE_BUILD

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 ()
{

}
#endif