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Very slow HAL (SPI)

Question asked by Caha.Philipp.001 on May 2, 2017
Latest reply on Jul 28, 2017 by KIC8462852 EPIC204278916


I use the HAL Library for a STM32L4 MCU clocked at 80MHz. The time between two Bytes are 3us. This is to slow for my Application, but I can not transfer more bytes or use a DMA, because I must react on a Signal from a pin.


for (int i = 2; i < 8; i++)
        HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)&awTxBuffer[i], (uint8_t *)&awRxBuffer[i], 1, 0x00);
        while (HAL_SPI_GetState(&hspi1) != HAL_SPI_STATE_READY);
//            while (GPIO_PIN_RESET == HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_5));


Is there a way to speed up my Application?

Thanks for hints,