The chip-selected pin goes high even set low during SPI transition

Hello Group,

I am reading SPI from the Nucleo STM#@F401RE with the ST accelerometer LIS2DW12. I set the chip-selected pin low during the transition, but I saw the selected pin go high.

How I fix this problem?

Thanks a lot for your time,

Jack

void readId()

{

      uint8_t bufp[1];

      uint8_t reg = LIS2DW12_WHO_AM_I;

      reg |= 0x80;

      HAL_GPIO_WritePin(CS_up_GPIO_Port, CS_up_Pin, GPIO_PIN_RESET);

      HAL_SPI_Transmit(&hspi2, &reg, 1, 1000);

      HAL_SPI_Receive(&hspi2, bufp, 1, 1000);

      HAL_GPIO_WritePin(CS_up_GPIO_Port, CS_up_Pin, GPIO_PIN_SET);

}