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关于STM32F405 SPI3的问题？？？

2021-5-27 15:45:17 897

0 #define spiPortOfEEPROM 3 /***************************************************************************** 函数功能：初始化EEPROM 输入：无输出：无返回值：无备注：无 ***************************************************************************/ void InitEEPROM(void) { //MX25L-CS，初始化片选 PA4 GPIO_InitTypeDef GPIO_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15 ; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化对应spi SPI_Configuration(spiPortOfEEPROM); } /***************************************************************************** * Function Name : SPI_Configuration * Description : SPI模块初始化，【包括相关IO口的初始化】 * Input : None * Output : None * Return : None *****************************************************************************/ void SPI_Configuration(unsigned char port) { GPIO_InitTypeDef GPIO_InitStructure; SPI_InitTypeDef SPI_InitStructure; switch(port) { case 1: //启动SPI1时钟 RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//使能GPIOB,GPIOC时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);//使能SPI2时钟 GPIO_PinAFConfig(GPIOA,GPIO_PinSource5,GPIO_AF_SPI1); //PA5复用为 SPI1 GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_SPI1); //PA6复用为 SPI1 GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_SPI1); //PA7复用为 SPI1 //////下面是SPI相关GPIO初始化////// //Configure SPI1 pins: SCK, MISO and MOSI //GPIOA5~7初始化设置 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5\|GPIO_Pin_6\|GPIO_Pin_7;//PA5~7复用功能输出 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化 //Configure PA4 pin: MX25L_CS pin //GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//PA4 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;//PA4 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//输出 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; 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_256; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(SPI1, &SPI_InitStructure); SPI_Cmd(SPI1, ENABLE); SPI_ReadWriteByte(1,0xff);//启动传输 break; case 2: //启动SPI2时钟 RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);//使能GPIOB时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);//使能SPI2时钟 GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_SPI2); //PB13复用为 SPI2 GPIO_PinAFConfig(GPIOB,GPIO_PinSource14,GPIO_AF_SPI2); //PC2复用为 SPI2 GPIO_PinAFConfig(GPIOB,GPIO_PinSource15,GPIO_AF_SPI2); //PC3复用为 SPI2 //////下面是SPI相关GPIO初始化////// //Configure SPI2 pins: SCK, MISO and MOSI //GPIOB13~15初始化设置 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13\|GPIO_Pin_14\|GPIO_Pin_15;//PB13~15复用功能输出 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化 //Configure PB12 pin: SD_CS pin GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//PB12 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//输出 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; 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_256; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(SPI2, &SPI_InitStructure); SPI_Cmd(SPI2, ENABLE); SPI_ReadWriteByte(2,0xff);//启动传输 break; case 3: RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA\|RCC_AHB1Periph_GPIOB\|RCC_AHB1Periph_GPIOC, ENABLE);//使能时钟 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);//使能SPI3时钟 //////下面是SPI相关GPIO初始化////// //Configure SPI1 pins: SCK, MISO and MOSI //GPIOA5~7初始化设置 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;//PA5~7复用功能输出 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10\|GPIO_Pin_11;// GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//输出 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化 GPIO_PinAFConfig(GPIOB,GPIO_PinSource5,GPIO_AF_SPI3); GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_SPI3); GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_SPI3); //这里只针对SPI口初始化 RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3,ENABLE);//复位SPI1 RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3,DISABLE);//停止复位SPI1 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; 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_256; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(SPI3, &SPI_InitStructure); SPI_Cmd(SPI3, ENABLE); SPI_ReadWriteByte(3,0xAA);//启动传输 break; } } /***************************************************************************** * Function Name : SPI_ReadWriteByte * Description : SPI读写一个字节（发送完成后返回本次通讯读取的数据） * Input : u8 TxData 待发送的数 * Output : None * Return : u8 RxData 收到的数 *******************************************************************************/ unsigned char SPI_ReadWriteByte(unsigned char port,unsigned char TxData) { unsigned char RxData = 0; unsigned short j=0; switch(port) { case 1: j=0; //等待发送缓冲区空 while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET) { if(j++>5000)break; } //发一个字节 SPI_I2S_SendData(SPI1, TxData); //等待数据接收 j=0; while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET) { if(j++>5000)break; } //取数据 RxData = SPI_I2S_ReceiveData(SPI1); break; case 2: j=0; //等待发送缓冲区空 while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET) { if(j++>5000)break; } //发一个字节 SPI_I2S_SendData(SPI2, TxData); //等待数据接收 j=0; while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET) { if(j++>5000)break; } //取数据 RxData = SPI_I2S_ReceiveData(SPI2); break; case 3: j=0; //等待发送缓冲区空 while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) == RESET) { if(j++>5000)break; } //发一个字节 SPI_I2S_SendData(SPI2, TxData); //等待数据接收 j=0; while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET) { if(j++>5000)break; } //取数据 RxData = SPI_I2S_ReceiveData(SPI3); break; default: break; } return (unsigned char)RxData; } 调了一天了，一点波形都没有。无语中。。。 0
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