问答-
GD32F103VC替换ST32F103VC后，SPI读出的数全是0xff
用ST芯片，SPI读取正常。换成GD芯片后，按照官方提供的GD和ST差异表，修改了程序，u8SPI_FLASH_SendByte(u8byte)返回值全是0xff，有人遇到过这种情况吗？u8SPI_FLASH_SendByte(u8byte)//{/*LoopwhileDRregisterinnotemplty*/while((SPI1->SR&SPI_I2S_FLAG_TXE)==0);/*SendbytethroughtheSPI1peripheral*/SPI1->DR=byte;/*Waittoreceiveabyte*/while((SPI1->SR&SPI_I2S_FLAG_RXNE)==0);/*ReturnthebytereadfromtheSPIbus*/returnSPI1->DR;}
2021-06-03 1
