how i can tarnsmit and receive 1 byte

Posted on July 03, 2016 at 07:14

How i can transmit and receive 1 byte by SPI and use of HAL layer for STM32F4 to do for example below routin:

while(1)

{

while (__HAL_SPI_GET_FLAG(&hspi1,SPI_FLAG_TXE) == RESET);

temp=0x00;

HAL_SPI_Transmit(&hspi1,(uint8_t *)&temp,1,10);

while (__HAL_SPI_GET_FLAG(&hspi1,SPI_FLAG_RXNE) == RESET);

HAL_SPI_Receive(&hspi1,data,1,10);

}

the micro can not pass RXNE flag while data received. Why?

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