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void SPI_Configuration(void) { SPI_InitTypeDef SPI_InitStruct; GPIO_InitTypeDef GPIO_InitStructure; RCC_AHB1PeriphClockCmd(Open207Z_SPIx_SCK_GPIO_CLK | Open207Z_SPIx_MISO_GPIO_CLK | Open207Z_SPIx_MOSI_GPIO_CLK,ENABLE); #ifdef OpenSPI1 RCC_APB2PeriphClockCmd(Open207Z_SPIx_CLK,ENABLE); #else RCC_APB1PeriphClockCmd(Open207Z_SPIx_CLK,ENABLE); #endif GPIO_PinAFConfig(Open207Z_SPIx_SCK_GPIO_PORT, Open207Z_SPIx_SCK_SOURCE, Open207Z_SPIx_SCK_AF); GPIO_PinAFConfig(Open207Z_SPIx_MISO_GPIO_PORT, Open207Z_SPIx_MISO_SOURCE, Open207Z_SPIx_MISO_AF); GPIO_PinAFConfig(Open207Z_SPIx_MOSI_GPIO_PORT, Open207Z_SPIx_MOSI_SOURCE, Open207Z_SPIx_MOSI_AF); GPIO_InitStructure.GPIO_Pin = Open207Z_SPIx_SCK_PIN; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(Open207Z_SPIx_SCK_GPIO_PORT, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = Open207Z_SPIx_MISO_PIN; GPIO_Init(Open207Z_SPIx_MISO_GPIO_PORT, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = Open207Z_SPIx_MOSI_PIN; GPIO_Init(Open207Z_SPIx_MOSI_GPIO_PORT, &GPIO_InitStructure); SPI_I2S_DeInit(Open207Z_SPIx); SPI_InitStruct.SPI_Direction= SPI_Direction_2Lines_FullDuplex; SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b; SPI_InitStruct.SPI_Mode = SPI_Mode_Master; SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low ; SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge; SPI_InitStruct.SPI_NSS = SPI_NSS_Soft ; SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128; SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStruct.SPI_CRCPolynomial = 7; SPI_Init(Open207Z_SPIx, &SPI_InitStruct); SPI_Cmd(Open207Z_SPIx, ENABLE); } void SPIx_Send_byte(u16 data) { while(SPI_I2S_GetFlagStatus(Open207Z_SPIx, SPI_I2S_FLAG_TXE)==RESET); SPI_I2S_SendData(Open207Z_SPIx,data); while(SPI_I2S_GetFlagStatus(Open207Z_SPIx, SPI_I2S_FLAG_RXNE)==RESET); SPI_I2S_ReceiveData(Open207Z_SPIx); } u16 SPIx_Receive_byte(void) { while(SPI_I2S_GetFlagStatus(Open207Z_SPIx, SPI_I2S_FLAG_TXE)==RESET); SPI_I2S_SendData(Open207Z_SPIx,0x00); while(SPI_I2S_GetFlagStatus(Open207Z_SPIx, SPI_I2S_FLAG_RXNE)==RESET); return SPI_I2S_ReceiveData(Open207Z_SPIx); }
代码初始化完成后spi的IO口上没有波形输出
大神请指教