MIT SPIne测试3

为了确定每个片选芯片都是有效的，编写了新的测试程序，其中STM32通过GPIO中断来判断片选信号是否触发。

测试结果验证了两个片选信号分别有效，那么问题就出在SPI信号收发的过程中，一步步缩小了问题范围。

#include "rt_spi.h"

// #include "PeriodicTask.h"

#include <cmath>
#include <iostream>
#include <unistd.h>

int spi_1_fd = -1;
int spi_2_fd = -1;

const char* name1 = "/dev/spidev0.0";
const char* name2 = "/dev/spidev0.1";

int main()
{
    spi_open(spi_1_fd, name1);

    uint8_t tx[16];
    uint8_t rx_1[16];
    uint8_t rx_2[16];

    for (int i = 0; i < 16; ++i)
    {
        tx[i] = i;
    }

    int rv = transfer(spi_1_fd, tx, rx_1, 16);
    (void)rv;
    auto str = hex2str(rx_1, 16);
    std::cout << name1 << ": "<< str << std::endl;

    spi_close(spi_1_fd);

    return 0;
}

int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_CAN1_Init();
  MX_CAN2_Init();
  MX_SPI1_Init();
  MX_USART2_UART_Init();
  /* USER CODE BEGIN 2 */
  for(int i = 0; i < 16; ++i)
  {
    tx[i] = i;
  }
  HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, GPIO_PIN_SET);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    HAL_Delay(1000);
  }
  /* USER CODE END 3 */
}

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
  if(GPIO_Pin == SPI_CS_Pin)
  {
    HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
  }
}