pBuf[u8_ctr]=SPI1_ReadWriteByte(0XFF);-第2页回答

pBuf[u8_ctr]=SPI1_ReadWriteByte(0XFF);

2019-07-20 16:02发布

u8 NRF24L01_Read_Buf(u8 reg,u8 *pBuf,u8 len)
{
  u8 status,u8_ctr;
  NRF24L01_CSN = 0;          //ê1ÄüSPI′«êä
  status=SPI1_ReadWriteByte(reg);//·￠Ëí¼Ä′æÆ÷Öμ(Î»ÖÃ),2￠¶áè¡×′ì¬Öμ
  for(u8_ctr=0;u8_ctr<len;u8_ctr++)pBuf[u8_ctr]=SPI1_ReadWriteByte(0XFF);//¶á3öêy¾Y
  NRF24L01_CSN=1;    //1Ø±ÕSPI′«êä
  return status;       //·μ»Ø¶áμ½μÄ×′ì¬Öμ
}

  有人知道这的for(u8_ctr=0;u8_ctr<len;u8_ctr++)pBuf[u8_ctr]=SPI1_ReadWriteByte(0XFF);中写入0xFF是为什么吗？

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