[经验]

【RA4M2-SENSOR】—— 3.使用串口点灯（高级操作）

jf_43382582

2025-8-31 17:35:08

683 RA4M2

串口助手通信点灯

上篇文章中我已经测试了串口功能，本次帖子就来使用串口通讯来进行点灯操作，其实是用到了串口通讯功能！！！！！
打开原理图

根据原理图配置好串口和LED，我前期已经配置好了，这里不赘述！！！

实现串口shell核心代码
#include "shell.h"
#include "usart9.h"
#include "LED.h"

#include <string.h>
#include <stdio.h>
#include <stdint.h>

void shell_init(void) {
printf("\r\n[Embedded Shell Ready]\r\n> ");
}

void shell_process(void) {
char c;
if(user9_uart_wait_receive() == REV_OK)
{
printf("\r\n");
if (strcmp(U9_RxBuff, "LED ON") == 0)
{
LED1_ON();LED2_ON();LED3_ON();
printf("LED turned ON\r\n");
}
else if (strcmp(U9_RxBuff, "LED OFF") == 0)
{
LED1_OFF();LED2_OFF();LED3_OFF();
printf("LED turned OFF\r\n");
}
else if (strcmp(U9_RxBuff, "HELP") == 0)
{
printf("Commands: LED ON, LED OFF, STATUS, HELP\r\n");
}
else
{
printf("Unknown command\r\n");
}
user9_uart_clear();
}
HAL_Delay(10);
}

#include "hal_data.h"
#include "LED.h"
#include "Systick.h"
#include "usart0.h"
#include "usart9.h"
#include "shell.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 */
hal_systick_init();
UART0_Init();UART9_Init();

shell_init();

while(1)
{
shell_process();
}

#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
主函数中调用