Posted on January 10, 2016 at 18:38Hello
I am trying configure STM32F4 DISCO to read LIS3DSH using HAL but I have problems on read WHO_AM_I (0x0F) with default value 0011 1111
I generate the configuration in MX cube:
void MX_SPI1_Init(void)
{
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;//LOW;
hspi1.Init.CLKPhase = SPI_PHASE_2EDGE;//1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;//4;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLED;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;//7;
HAL_SPI_Init(&hspi1);
}
main()
{
****
MX_GPIO_Init();
MX_SPI1_Init();
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_3, GPIO_PIN_SET);
__HAL_SPI_ENABLE(&hspi1);
write_accelerator_register(0x20, 0x17, &hspi1);
write_accelerator_register(0x24, 0x00, &hspi1);
uint8_t id;
id=read_accelerator_register(0x0F, &hspi1);
****
}
void write_accelerator_register(uint8_t piRegister, uint8_t piData, SPI_HandleTypeDef* phSPI)
{
// Set SS to low to select the accelerator on the SPI interface.
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_3, GPIO_PIN_RESET);
// Send register index which we want to write.
HAL_SPI_Transmit(phSPI, &piRegister, 1, 100);
HAL_SPI_Transmit(phSPI, &piData, 1, 100);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_3, GPIO_PIN_SET);
}
uint8_t read_accelerator_register(uint8_t piRegister, SPI_HandleTypeDef* phSPI)
{
uint8_t iResult = 0;
// Set SS to low to select the accelerator on the SPI interface.
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_3, GPIO_PIN_RESET);
// Set MSB to indicate a read operation.
piRegister |= 0x80;
HAL_SPI_Transmit(phSPI, &piRegister, 1, 100);
HAL_SPI_Receive(phSPI, &iResult, 1, 100);
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_3, GPIO_PIN_SET);
return iResult;
}
Can you help me?
Best regards
(Sorry for the english)
