I work with st7735 spi display.
I use program from github.
https://github.com/afiskon/stm32-st7735
this program work without any problem at STM32F103C8T6.
And after, I take this program & compile one for F042T6Tx microcontroller.
And program not work.
Hardware error!
I noticed that the program works to the point where the function transmits more than one byte.
Next, I replace code in hal_spi_transmit function.
take some code from f1 hal driver & put one to f0 hal driver.
And program work!!!!
but this is not good idea, I think, change standart ST library driver.
HAL_StatusTypeDef HAL_SPI_Transmit(SPI_HandleTypeDef *hspi, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
uint32_t tickstart = 0U;
HAL_StatusTypeDef errorcode = HAL_OK;
if ((hspi->Init.DataSize > SPI_DATASIZE_8BIT) || (Size > 1U))
{
/* in this case, 16-bit access is performed on Data
So, check Data is 16-bit aligned address */
assert_param(IS_SPI_16BIT_ALIGNED_ADDRESS(pData));
}
/* Check Direction parameter */
assert_param(IS_SPI_DIRECTION_2LINES_OR_1LINE(hspi->Init.Direction));
/* Process Locked */
__HAL_LOCK(hspi);
/* Init tickstart for timeout management*/
tickstart = HAL_GetTick();
if (hspi->State != HAL_SPI_STATE_READY)
{
errorcode = HAL_BUSY;
goto error;
}
if ((pData == NULL) || (Size == 0U))
{
errorcode = HAL_ERROR;
goto error;
}
/* Set the transaction information */
hspi->State = HAL_SPI_STATE_BUSY_TX;
hspi->ErrorCode = HAL_SPI_ERROR_NONE;
hspi->pTxBuffPtr = (uint8_t *)pData;
hspi->TxXferSize = Size;
hspi->TxXferCount = Size;
/*Init field not used in handle to zero */
hspi->pRxBuffPtr = (uint8_t *)NULL;
hspi->RxXferSize = 0U;
hspi->RxXferCount = 0U;
hspi->TxISR = NULL;
hspi->RxISR = NULL;
/* Configure communication direction : 1Line */
if (hspi->Init.Direction == SPI_DIRECTION_1LINE)
{
SPI_1LINE_TX(hspi);
}
#if (USE_SPI_CRC != 0U)
/* Reset CRC Calculation */
if (hspi->Init.CRCCalculation == SPI_CRCCALCULATION_ENABLE)
{
SPI_RESET_CRC(hspi);
}
#endif /* USE_SPI_CRC */
/* Check if the SPI is already enabled */
if ((hspi->Instance->CR1 & SPI_CR1_SPE) != SPI_CR1_SPE)
{
/* Enable SPI peripheral */
__HAL_SPI_ENABLE(hspi);
}
/* Transmit data in 16 Bit mode */
if (hspi->Init.DataSize > SPI_DATASIZE_8BIT)
{
if ((hspi->Init.Mode == SPI_MODE_SLAVE) || (hspi->TxXferCount == 0x01U))
{
hspi->Instance->DR = *((uint16_t *)pData);
pData += sizeof(uint16_t);
hspi->TxXferCount--;
}
/* Transmit data in 16 Bit mode */
while (hspi->TxXferCount > 0U)
{
/* Wait until TXE flag is set to send data */
if (__HAL_SPI_GET_FLAG(hspi, SPI_FLAG_TXE))
{
hspi->Instance->DR = *((uint16_t *)pData);
pData += sizeof(uint16_t);
hspi->TxXferCount--;
}
else
{
/* Timeout management */
if ((Timeout == 0U) || ((Timeout != HAL_MAX_DELAY) && ((HAL_GetTick() - tickstart) >= Timeout)))
{
errorcode = HAL_TIMEOUT;
goto error;
}
}
}
}
/* Transmit data in 8 Bit mode */
else
{
if ((hspi->Init.Mode == SPI_MODE_SLAVE) || (hspi->TxXferCount == 0x01U))
{
*((__IO uint8_t*)&hspi->Instance->DR) = (*pData);
pData += sizeof(uint8_t);
hspi->TxXferCount--;
}
while (hspi->TxXferCount > 0U)
{
/* Wait until TXE flag is set to send data */
if(__HAL_SPI_GET_FLAG(hspi, SPI_FLAG_TXE))
{
*((__IO uint8_t*)&hspi->Instance->DR) = (*pData);
pData += sizeof(uint8_t);
hspi->TxXferCount--;
}
// if (hspi->TxXferCount > 1U)
// {
// /* write on the data register in packing mode */
// hspi->Instance->DR = *((uint16_t *)pData);
// pData += sizeof(uint16_t);
// hspi->TxXferCount -= 2U;
// }
// else
// {
// *((__IO uint8_t *)&hspi->Instance->DR) = (*pData++);
// hspi->TxXferCount--;
// }
// }
// while (hspi->TxXferCount > 0U)
// {
// /* Wait until TXE flag is set to send data */
// if (__HAL_SPI_GET_FLAG(hspi, SPI_FLAG_TXE))
// {
// if (hspi->TxXferCount > 1U)
// {
// /* write on the data register in packing mode */
// hspi->Instance->DR = *((uint16_t *)pData);
// pData += sizeof(uint16_t);
// hspi->TxXferCount -= 2U;
// }
// else
// {
// *((__IO uint8_t *)&hspi->Instance->DR) = (*pData++);
// hspi->TxXferCount--;
// }
// }
else
{
/* Timeout management */
if ((Timeout == 0U) || ((Timeout != HAL_MAX_DELAY) && ((HAL_GetTick() - tickstart) >= Timeout)))
{
errorcode = HAL_TIMEOUT;
goto error;
}
}
}
}
#if (USE_SPI_CRC != 0U)
/* Enable CRC Transmission */
if (hspi->Init.CRCCalculation == SPI_CRCCALCULATION_ENABLE)
{
SET_BIT(hspi->Instance->CR1, SPI_CR1_CRCNEXT);
}
#endif /* USE_SPI_CRC */
/* Check the end of the transaction */
if (SPI_EndRxTxTransaction(hspi, Timeout, tickstart) != HAL_OK)
{
hspi->ErrorCode = HAL_SPI_ERROR_FLAG;
}
/* Clear overrun flag in 2 Lines communication mode because received is not read */
if (hspi->Init.Direction == SPI_DIRECTION_2LINES)
{
__HAL_SPI_CLEAR_OVRFLAG(hspi);
}
if (hspi->ErrorCode != HAL_SPI_ERROR_NONE)
{
errorcode = HAL_ERROR;
}
error:
hspi->State = HAL_SPI_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hspi);
return errorcode;
}
