Problem with buffer_size_send parameter using multiple SPI block

[RGalvez]

Hi everyone,

I'm having problems using several SPI blocks for different data length transmission via SPI with a STM32F303 MCU.

I've realized that when I try to send multiple messages with different data length (using different SPI blocks) the data buffer TX of the SPI remains constant in function of the Buffer_Size_Send parameter of the block .

If I try to send another data with other SPI block and I change Buffer_Size_Send according to data length, only the first Buffer_Size_Send is taken in consideration during the transmission so I only send three bytes. This is the generated code where I realized the DataBufferTX remains constant for la SPI1_DataLink struct in any function call generated by the block.

/* Array of SPI data information */
struct SPI_DataLinkTypeDef* G_SPI_Data[1];/* Pointer to SPI data information*/
 
/* SPI1 transmit data buffers*/
uint8_t G_SPI1_DataBufferTx[3];
uint8_t G_SPI1_DataBufferRx[0];
 
/* SPI1 transmit data structure information*/
struct SPI_DataLinkTypeDef SPI1_DataLink;

What should I do for sending different buffer size send in the same model?

Which element of the model sets the G_SPI1_DataBufferTX dimension?

Regards,

Ruben