u8 SPI_FLASH_SendByte(u8 byte)
{
/* Loop while DR register in not emplty */
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
/* Send byte through the SPI1 peripheral */
SPI_I2S_SendData(SPI1, byte);
/* Wait to receive a byte */
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);//等待接受寄存器非空
/* Return the byte read from the SPI bus */
return SPI_I2S_ReceiveData(SPI1);
}
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);//等待接受寄存器非空
写个字节后，如果FLASH没给数据那岂不是一直在等了？？？？ |
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楼主
