Murata SCA3300_d01 sensor SPI_DMA communication

[shub]

I am using NUCLEO-L4R5ZI MCU to communicate with Murata SCA3300 sensor. As an initial step I am trying to read WHOAMI to check weather SPI communication is established. According to data sheet of the sensor returned value should be 51h but I am getting 0. While debugging I also see that WHOAMI variable which I have declared and given the address value changes to some garbage value.

I am pretty sure I am making mistakes as I am very new to this platform. I request and thank to valuable inputs. 

Below is my code:

const int8_t Read_WHOAMI[4] = { 0x40, 0x00, 0x00, 0x91 }; //Address as given in datasheet

HAL_GPIO_WritePin(GPIOD, GPIO_PIN_0, GPIO_PIN_RESET);

HAL_SPI_Transmit_DMA(&hspi2, Read_WHOAMI, 4);  //While debugging the Read_WHOAMI changes to some garbage value here

HAL_GPIO_WritePin(GPIOD, GPIO_PIN_0, GPIO_PIN_SET);

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 = 7;

hspi2.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;

hspi2.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;

if (HAL_SPI_Init(&hspi2) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN SPI2_Init 2 */

/* USER CODE END SPI2_Init 2 */

}