【RA-Eco-RA4E2-64PIN-V1.0开发板试用】串口打印功能

刘玉

6 天前

220 单片机

串口

刚刚点灯完毕，现在来实现RA4E2的串口打印功能，先打开原理图，我们看到
图片.png

串口使用的是P109和P110两个IO口，然后我们来进行配置

先打开
图片.png

RA4E2_UART

图片.png

下一步
图片.png

随便选一个
图片.png

图片.png
配置好串口9，选择通道9

中断函数改名如下

生成代码，然后打开keil，开始编写串口函数

#include "hal_data.h"
#include "stdio.h"

void R_BSP_WarmStart(bsp_warm_start_event_t event);

extern bsp_leds_t g_bsp_leds;

fsp_err_t err = FSP_SUCCESS;
unsigned char send_buff[100];
volatile bool uart_send_complete_flag = false;

void uart_user_callback (uart_callback_args_t * p_args)
{
switch (p_args->event)
{
case UART_EVENT_RX_CHAR:
{
/* 把串口接收的数据发送回去 */
R_SCI_UART_Write(&g_uart9_ctrl, (uint8_t *)&(p_args->data), 1);
break;
}
case UART_EVENT_TX_COMPLETE:
{
uart_send_complete_flag = true;
break;
}
default:
break;
}
}

#if defined GNUC && !defined clang
int _write(int fd, char *pBuffer, int size); //防止编译器警告
int _write(int fd, char *pBuffer, int size)
{
(void)fd;
R_SCI_UART_Write(&g_uart9_ctrl, (uint8_t *)pBuffer, (uint32_t)size);
while(uart_send_complete_flag == false);
uart_send_complete_flag = false;

return size;
}
#else
int fputc(int ch, FILE *f)
{
(void)f;
R_SCI_UART_Write(&g_uart9_ctrl, (uint8_t *)&ch, 1);
while(uart_send_complete_flag == false);
uart_send_complete_flag = false;

return ch;
}
#endif
下面是主函数

void hal_entry (void)
{
#if BSP_TZ_SECURE_BUILD

/* Enter non-secure code */
R_BSP_NonSecureEnter();

#endif

/* Define the units to be used with the software delay function */
const bsp_delay_units_t bsp_delay_units = BSP_DELAY_UNITS_MILLISECONDS;

/* Set the blink frequency (must be <= bsp_delay_units */
const uint32_t freq_in_hz = 2;

/* Calculate the delay in terms of bsp_delay_units */
const uint32_t delay = bsp_delay_units / freq_in_hz;

/* LED type structure */
bsp_leds_t leds = g_bsp_leds;

    err = R_SCI_UART_Open(&g_uart9_ctrl, &g_uart9_cfg);
assert(FSP_SUCCESS == err);

unsigned char buff[]="RA E2STUDIO";
uint8_t buff_len = strlen(buff);
err = R_SCI_UART_Write(&g_uart9_ctrl, buff, buff_len);
if(FSP_SUCCESS != err) __BKPT();
while(uart_send_complete_flag == false){}
uart_send_complete_flag = false;

printf("欢迎使用瑞萨电子\r\n");			
	printf("RA4E2 M33\r\n");	
	printf("串口测试\r\n");			
   while(1)
   {

	  

	   printf("瑞萨串口—每500毫秒打印一次\r\n");
       R_BSP_SoftwareDelay(500, BSP_DELAY_UNITS_MILLISECONDS); // NOLINT100->160
   }