SPI communication
Hello,
I have problem with establishing wifi connection on STM32H7B3I-DK. I am using SPI2. I dont get any response. I am using simple AT command, that should give response 'OK'. This is my int main() and initialisation of SPI2:
int main(void)
{
/* USER CODE BEGIN 1 */
char uart_buf[50];
int uart_buf_len;
char spi_buf[20];
uint8_t addr;
uint8_t wip;
/* 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();
/* Configure the peripherals common clocks */
PeriphCommonClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_FMC_Init();
MX_I2C4_Init();
MX_I2S6_Init();
MX_LTDC_Init();
MX_OCTOSPI1_Init();
MX_RTC_Init();
MX_SPI2_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
// CS pin should default high
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_SET);
// Say something
uart_buf_len = sprintf(uart_buf, "SPI Test\r\n");
HAL_UART_Transmit(&huart1, (uint8_t *)uart_buf, uart_buf_len, 100);
// Enable write enable latch (allow write operations)
char response[1000]; // Assuming maximum response length is 1000 bytes
// Send command to connect to a WiFi network
char ssid[] = ""; // Changed from char to char array
char password[] = ""; // Changed from char to char array
char command[4]; // Changed from char to char array
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_RESET);
sprintf(command, "AT\r\n", ssid, password);
HAL_SPI_Transmit(&hspi2, (uint8_t *)command, strlen(command), HAL_MAX_DELAY);
// Receive response
HAL_SPI_Receive(&hspi2, (uint8_t *)response, sizeof(response), HAL_MAX_DELAY);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_11, GPIO_PIN_SET);
// Append \r\n to response
sprintf(response + strlen(response), "\r\n");
// Transmit response via UART
uart_buf_len = strlen(response); // Changed from sprintf to strlen
HAL_UART_Transmit(&huart1, (uint8_t *)response, uart_buf_len, 100); // Changed uart_buf to response
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
spi2:
static void MX_SPI2_Init(void)
{
/* USER CODE BEGIN SPI2_Init 0 */
/* USER CODE END SPI2_Init 0 */
/* USER CODE BEGIN SPI2_Init 1 */
/* USER CODE END SPI2_Init 1 */
/* SPI2 parameter configuration*/
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_MASTER;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_8BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi2.Init.NSS = SPI_NSS_SOFT;
hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_64;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 0x0;
hspi2.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
hspi2.Init.NSSPolarity = SPI_NSS_POLARITY_LOW;
hspi2.Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA;
hspi2.Init.TxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;
hspi2.Init.RxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;
hspi2.Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE;
hspi2.Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE;
hspi2.Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE;
hspi2.Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_DISABLE;
hspi2.Init.IOSwap = SPI_IO_SWAP_DISABLE;
if (HAL_SPI_Init(&hspi2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI2_Init 2 */
/* USER CODE END SPI2_Init 2 */
}