Posted on March 02, 2018 at 10:59I used MXcube to generate initiaation code as SPI Slave, CHPA is hope to be Low.
But it will be set when the LL_SPI_Init(SPI1, &SPI_InitStruct) function is running.
I found that Miss BaudRate Field. It can probably induce ClockPhase wrong configuration.
After Added Baudrate field, the issue is fixed.
NVIC_SetPriority(SPI1_IRQn, 0);
NVIC_EnableIRQ(SPI1_IRQn);
SPI_InitStruct.TransferDirection = LL_SPI_FULL_DUPLEX;
SPI_InitStruct.Mode = LL_SPI_MODE_SLAVE;
SPI_InitStruct.DataWidth = LL_SPI_DATAWIDTH_16BIT;
SPI_InitStruct.ClockPolarity = LL_SPI_POLARITY_LOW;
SPI_InitStruct.ClockPhase = LL_SPI_PHASE_1EDGE;
SPI_InitStruct.NSS = LL_SPI_NSS_HARD_INPUT;
SPI_InitStruct.BitOrder = LL_SPI_MSB_FIRST;
SPI_InitStruct.CRCCalculation = LL_SPI_CRCCALCULATION_ENABLE;
SPI_InitStruct.CRCPoly = 4129;
LL_SPI_Init(SPI1, &SPI_InitStruct);
LL_SPI_SetStandard(SPI1, LL_SPI_PROTOCOL_MOTOROLA);
LL_SPI_SetCRCWidth(SPI1, LL_SPI_CRC_16BIT);
LL_SPI_DisableNSSPulseMgt(SPI1);
