[ ST NUCLEO-U575ZI-Q Review ]+ Control LED lights with commands

jinglixixi

[ ST NUCLEO-U575ZI-Q Review ]+ Control LED lights with commands [Copy link]

In order to check the subsequent design, first test the control of the LED light by command.

There are three LED lights, red, green and blue, on the development board. To control their on and off, three instructions are assigned to them and stored in an array. The instructions are as follows:

uint8_t aTxBuffer1[] = {0x74,0x31,0xff,0xff,0xff};

uint8_t aTxBuffer2[] = {0x74,0x32,0xff,0xff,0xff};

uint8_t aTxBuffer3[] = {0x74,0x33,0xff,0xff,0xff};

The received instructions are also stored in an array, which is defined as:

uint8_t aRxBuffer[5];

The main control program is as follows:

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  SystemPower_Config();
  MX_GPIO_Init();
  MX_ICACHE_Init();
  MX_USART2_UART_Init();
  BSP_LED_Init(LED1);
  BSP_LED_Init(LED2);
  BSP_LED_Init(LED3);
  BSP_LED_Off(LED1);
  BSP_LED_Off(LED2);
  BSP_LED_Off(LED3);
  while (1)
  {
    HAL_UART_Receive(&huart2, (uint8_t *)aRxBuffer, 5, 5000);
    if (Buffercmp((uint8_t *)aTxBuffer1, (uint8_t *)aRxBuffer, 5)==0)
    {
        BSP_LED_On(LED1);
    	BSP_LED_Off(LED2);
        BSP_LED_Off(LED3);
    }
	
    if (Buffercmp((uint8_t *)aTxBuffer2, (uint8_t *)aRxBuffer, 5)==0)
    {
        BSP_LED_On(LED2);
    	BSP_LED_Off(LED1);
        BSP_LED_Off(LED3);
    }
	
    if (Buffercmp((uint8_t *)aTxBuffer3, (uint8_t *)aRxBuffer, 5)==0)
    {
        BSP_LED_On(LED3);
        BSP_LED_Off(LED1);
        BSP_LED_Off(LED2);
    }
    aRxBuffer[1] = 0x30;
 }
}

After the program is compiled and downloaded, a serial port debugging tool can be provided to send instructions to the development board. Its interface is shown in Figure 1.

Figure 1 Sending instructions

The corresponding control effects are shown in FIG. 2 to FIG. 4 , where the t1 instruction is used to light up the green LED, the t2 instruction is used to light up the blue LED, and the t3 instruction is used to light up the red LED.

Figure 2: Turning on LED 1

Figure 3: Turning on LED 2

Figure 4 Turning on LED 3

lugl4313820

This is awesome, I haven't figured out DMA indefinite length reception yet. Can DMA indefinite length interrupt be implemented?

jinglixixi

lugl4313820 posted on 2023-1-3 13:28 This is awesome. I haven't figured out DMA variable length reception yet. Can DMA variable length interrupt be implemented?

I haven't tried it either, but it should be possible. You need to add an identifier to assist in the processing.

秦天qintian0303

lugl4313820 posted on 2023-1-3 13:28 This is awesome. I haven't figured out DMA variable length reception yet. Can DMA variable length interrupt be implemented?

Serial port DMA indefinite length data reception is generally implemented through the serial port idle interrupt, or through the flag, but the idle interrupt is more useful

okhxyyo

Review summary: Free application | ST NUCLEO-U575ZI-Q https://bbs.eeworld.com.cn/thread-1228653-1-1.html