RCC->APB2ENR|=1<<12; SPI_Init(SPI1, &SPI_InitStructure); SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b; SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; SPI_InitStructure.SPI_BaudRatePrescaler =SPI_BaudRatePrescaler_128; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Cmd(SPI1,ENABLE);
whie(1)
{
SPI_I2S_SendData(SPI1,0xff); }//为什么在PA7没有波形啊 新手哦 各位老师指点一下不甚感激啊
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