Change SPI speed (clock prescaler) and resume operation on H7

[bully]

Hello,

I'd like to change speed (clock prescaler setting in CFG1) and then resume sending bytes on SPI.

Right now, I do :

retval = HAL_SPI_Abort(&hspi2);

My_SPI2_Init(SPI_EyeGenPrescaler);

where My_SPI2_Init is just slightly customized version of Mx_SPI2_Init with new Prescaler value as input argument.

After this, I don't see anything on SPI MOSI output.

What am I doing wrong? Is something else needed to shutdown SPI and initialize it at new prescaler value ?

Can I somehow change speed more fine-grained than just changing prescaler to values like powers of 2 ?

Thanks,

regards.

[Saket_Om]

Hello @bully 

Could you please deinitialize the SPI before reinitializing it and check the result?

[bully · Accepted solution]

Hello,

thanks for response... It seems that I've forgot to start new send after reinitialization. Now it works...

Regards.