Posted on March 06, 2017 at 15:31Hi,
I have a macronix serial flash(MX66L1G45G) interfaced to my stm32f436 via spi4. hardware connections are correct.
Initialization functions are as follows.
int DRV_SPI_Init(void)
{
hspi.Instance = SPI4;
hspi.Init.Mode = SPI_MODE_MASTER;
hspi.Init.Direction = SPI_DIRECTION_2LINES;
hspi.Init.DataSize = SPI_DATASIZE_8BIT;
hspi.Init.CLKPolarity = SPI_POLARITY_HIGH;
hspi.Init.CLKPhase = SPI_PHASE_2EDGE;
hspi.Init.NSS = SPI_NSS_SOFT;
//hspi.Init.NSS = SPI_NSS_HARD_OUTPUT ;
hspi.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
hspi.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi.Init.TIMode = SPI_TIMODE_DISABLED;
hspi.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
if(HAL_SPI_Init(&hspi) != HAL_OK)
{
retVal = -1;
}
return 0;
}
void HAL_SPI_MspInit(SPI_HandleTypeDef *hspi)
{
/* Variable declaration */
GPIO_InitTypeDef GPIO_InitStruct;
if(hspi->Instance==SPI4)
{
/* Peripheral clock enable */
__SPI4_CLK_ENABLE();
__GPIOE_CLK_ENABLE();
/**SPI4 GPIO Configuration
PE11 ------> SPI4_NSS
PE12 ------> SPI4_SCK
PE13 ------> SPI4_MISO
PE14 ------> SPI4_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; //?
GPIO_InitStruct.Pull = GPIO_NOPULL; //?
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; //?
GPIO_InitStruct.Alternate = GPIO_AF5_SPI4;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
/* Peripheral interrupt init*/
HAL_NVIC_SetPriority(SPI4_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(SPI4_IRQn);
}
}
When I write some thing i always get HAL_OK in return and when I try to read to confirm I always get 0 back in the
reciving buffer with HAL_OK.
For example i am trying to read EAR register
//put nss low
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_11, GPIO_PIN_RESET);
//read
hStatus = HAL_SPI_TransmitReceive(&(hspi), txData, txData, 3, 4); //static uint8_t txData[3] = {0xC8, 0xFF, 0xFF}; cmd followed by two dummy bytes
//wait xmission complete
while( hspi.State == HAL_SPI_STATE_BUSY );
//put nss high
HAL_GPIO_WritePin( GPIOE , GPIO_PIN_11 , GPIO_PIN_SET );
Can anybody point out any reason of not working, or any recommendation.
Thankyou !
#serial-flash #stm32f439 #spi
