Bug of HAL_SPI_Transmit_DMA for 1 byte

Posted on June 28, 2018 at 08:30

STM32L053R8T6 (Nucleo), STM32CubeMX 4.26

Here so two bytes are transferred perfectly

aTxBuffSPIECG[0] = 0x75;

aTxBuffSPIECG[1] = 0x55;

HAL_SPI_Transmit_DMA(&hspi2,(uint8_t*)aTxBuffSPIECG, 2);

But one byte is not transmitted

aTxBuffSPIECG[0] = 0x75;

//aTxBuffSPIECG[1] = 0x55;

HAL_SPI_Transmit_DMA(&hspi2,(uint8_t*)aTxBuffSPIECG, 1);

#transmit #spi #hal

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Guru

@CubeMX would hope one could expedite single byte transfers with a simple data register write rather than bringing the circus to town.

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