STM32U585QI SPI Issue

[Ramin1]

Hi,

I have successfully configured the SPI1 with following parameters and trying to transfer a single byte but it is being timed-out in HAL_SPI_Transmit as EOT is not being set.

Init.Mode = SPI_MODE_MASTER;

Init.Direction = SPI_DIRECTION_2LINES;

Init.DataSize = SPI_DATASIZE_8BIT;

Init.CLKPolarity = SPI_POLARITY_LOW;

Init.CLKPhase = SPI_PHASE_1EDGE;

Init.NSS = SPI_NSS_SOFT;

Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;

Init.FirstBit = SPI_FIRSTBIT_MSB;

Init.TIMode = SPI_TIMODE_DISABLE;

Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;

Init.CRCPolynomial = 0x7;

Init.NSSPMode = SPI_NSS_PULSE_DISABLE;

Init.NSSPolarity = SPI_NSS_POLARITY_LOW;

Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA;

Init.TxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;

Init.RxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;

Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE;

Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE;

Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE;

Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_DISABLE;

Init.IOSwap = SPI_IO_SWAP_DISABLE;

Init.ReadyMasterManagement = SPI_RDY_MASTER_MANAGEMENT_INTERNALLY;

Init.ReadyPolarity = SPI_RDY_POLARITY_HIGH;

I have tried many different combinations but no success so far.

I have sourced the SPI1 by RCC_SPI1CLKSOURCE_SYSCLK and my I2C peripheral on RCC_I2C1CLKSOURCE_PCLK1 is working so I am expecting SYSCLK to be correct. I have also enabled the SPI clock in HAL_SPI_MspInit

That would be great if you could help me with this.

Thanks in advance,

Ramin

[Imen.D]

Hello @Ramin​ ,

The End Of Transfer (EOT) flag must be checked at the end of the communication to be sure that all data (TSIZE: number of data at current transfer) have been transmitted/received. This flag should also be checked even if the CRC is not enabled.

Did you have a look to CubeU5 example and reproduce the same issue with working SPI example?

I advise you to have a look at the STM32U5 errata sheet, to check the limitations and if you have the same conditions as described in the doc.

Check also that the RX data length is less than 1024 bytes.

When your question is answered, please close this topic by choosing Select as Best.

Imen

[Ramin1 · Accepted solution]

Hi @Imen DAHMEN​ ,

Thanks for getting back to me, it is now working and here is the conclusion:

SPI1 was derived of Port G on our board and I had to enable VDDIO2 via PWR

[Imen.D]

Hi @Ramin​ ,

Really glad to know you overcame this problem, and thank you for all the update you provided.

Imen