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UFB · 2023-02-17

I'm having trouble understanding how the transfer complete interrupt is working.I have setup SPI using DMA to speed up data transfer to an LCD-display.The SPI clock is 18MHz, the System clock is 72MHz.From the book Mastering STM32 my understanding is...

UFB · 2023-02-18

@Jan - thanks for the example. Brought two things to attention: Initialization seem tricky, everybody does it in a different way, even with undocumented commandshad missed the max SPI-clock was 10MHz - saw 40ns somewhere and that threw me offas to sp...

UFB · 2023-02-17

Jan, I'm indeed talking about the 8-bit AVRs. If the STM32 is somewhat similar, I might end up modifying bits directly if speed or space requires it, just as I did with the AVRs.For the time being I will hang on to the Cube-IDE - it looks like the fl...

UFB · 2023-02-17

jan, thanks for your comment. Of course it is a bluepill and the bluepill-diagnostics reveal that it is was falsely advertised as genuine.Another one is on the way, this time "guaranteed" genuine - we'll see.This strange behaviour could have to do wi...

UFB · 2023-02-17

Something very strange going on. I have done some more testing and added the check for transfer completestatic void IL9341_WriteData(uint8_t *buff, size_t buff_size) { IL9341_Select(); IL9341_DC_Set(); flag=0; HAL_SPI_...

UFB · 2023-02-17

Correction: Instead of "Test pin is light blue" it should read "Diag pin is light blue"The colour refers to the scope traces, of course

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SPI with DMA interrupt handling for SPI transfer complete

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