STM32F429DISCO SPI

[bahec06]

Posted on March 23, 2015 at 21:36

Hello. I have some problems with SPI of my STM32F429DISCO board. I want to read ''WHO_AM_I'' of L3GD But when I read received data there is many different numbers, but not 0xD4. I'm created project with stm32cubemx and here is the code, associated with SPI.

void MX_SPI5_Init(void)
{
hspi5.Instance = SPI5;
hspi5.Init.Mode = SPI_MODE_MASTER;
hspi5.Init.Direction = SPI_DIRECTION_2LINES;
hspi5.Init.DataSize = SPI_DATASIZE_8BIT;
hspi5.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi5.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi5.Init.NSS = SPI_NSS_SOFT;
hspi5.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
hspi5.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi5.Init.TIMode = SPI_TIMODE_ENABLED;
hspi5.Init.CRCCalculation = SPI_CRCCALCULATION_ENABLED;
hspi5.Init.CRCPolynomial = 7;
HAL_SPI_Init(&hspi5);
}
void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(hspi->Instance==SPI5)
{
/* USER CODE BEGIN SPI5_MspInit 0 */
/* USER CODE END SPI5_MspInit 0 */
/* Peripheral clock enable */
__SPI5_CLK_ENABLE();
/**SPI5 GPIO Configuration 
PF7 ------> SPI5_SCK
PF8 ------> SPI5_MISO
PF9 ------> SPI5_MOSI 
*/
GPIO_InitStruct.Pin = GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_MEDIUM;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI5;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/* USER CODE BEGIN SPI5_MspInit 1 */
/* USER CODE END SPI5_MspInit 1 */
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4;
RCC_OscInitStruct.PLL.PLLN = 256;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV8;
RCC_OscInitStruct.PLL.PLLQ = 12;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3);
}
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();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SPI5_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_1, GPIO_PIN_RESET);
HAL_SPI_TransmitReceive(&hspi5, &address, &data, sizeof(data), 5000);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_1, GPIO_PIN_RESET);
if(data == 0xD4) {
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_SET);
}
else{
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_14, GPIO_PIN_SET);
}
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}

On the oscilloscope i have seen clock signal, MOSI signal and CS signal. But MISO signal is also in high level. Or when i have pull down or on high speed i have low level. Such changes i have seen when i changed CPOL and CPHA. Please help