抱歉，实在没有了，给你个AT32F421的参考一下吧！
想发个附件，电脑有问题不能添加附件发送，只好贴在下面：
/** ****************************************************************************** * File : SPI/SPI_W25Q_Flash/spi_flash.c * Version:V1.2.9 * Date : 2021-01-15 * Brief : W25Q flash source code ****************************************************************************** */ #include "at32f4xx.h" #include "spi_flash.h" uint8_t SpiFlash_SectorBuf[SPIF_SECTOR_SIZE];/* asector size */ uint8_t SpiFlash_Init(void) { GPIO_InitTypeGPIO_InitStructure; SPI_InitType SPI_InitStructure; GPIO_StructInit(&GPIO_InitStructure); RCC_APB2PeriphClockCmd(SPIx_RCC_CLK, ENABLE); RCC_AHBPeriphClockCmd(SPIx_DMA_RCC_CLK | SPIx_GPIO_RCC_CLK, ENABLE); /* ConfigureSPI_FLASH pins*/ GPIO_InitStructure.GPIO_Pins = SPIx_PIN_MOSI; GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_Init(SPIx_PORT_MOSI, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pins = SPIx_PIN_MISO; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_Init(SPIx_PORT_MISO, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pins = SPIx_PIN_SCK; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_Init(SPIx_PORT_SCK, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pins = SPIx_PIN_NSS; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OutType = GPIO_OutType_PP; GPIO_InitStructure.GPIO_Pull = GPIO_Pull_NOPULL; GPIO_Init(SPIx_PORT_NSS, &GPIO_InitStructure); GPIO_PinAFConfig(SPIx_PORT_MOSI, GPIO_PinsSource5, GPIO_AF_0); GPIO_PinAFConfig(SPIx_PORT_MOSI, GPIO_PinsSource6, GPIO_AF_0); GPIO_PinAFConfig(SPIx_PORT_MOSI, GPIO_PinsSource7, GPIO_AF_0); FLASH_CS_HIGH(); /* SPI_FLASHconfiguration ------------------------------------------------------*/ SPI_InitStructure.SPI_TransMode = SPI_TRANSMODE_FULLDUPLEX; SPI_InitStructure.SPI_CPHA = SPI_CPHA_2EDGE; SPI_InitStructure.SPI_CPOL = SPI_CPOL_HIGH; SPI_InitStructure.SPI_CPOLY = 0; SPI_InitStructure.SPI_FirstBit = SPI_FIRSTBIT_MSB; SPI_InitStructure.SPI_FrameSize = SPI_FRAMESIZE_8BIT; SPI_InitStructure.SPI_MCLKP = SPI_MCLKP_8; SPI_InitStructure.SPI_NSSSEL = SPI_NSSSEL_SOFT; SPI_InitStructure.SPI_Mode = SPI_MODE_MASTER; SPI_Init(FLASH_SPI, &SPI_InitStructure); /* Enable SPImodule */ SPI_Enable(FLASH_SPI, ENABLE); return 1; } /** * @param pbBuffer: buffer name * @param dwWriteAddr: buffer address * @param dwNumByteToWrite: buffer length * @retval none */ void SpiFlash_Write(uint8_t* pbBuffer, uint32_tdwWriteAddr, uint32_t dwNumByteToWrite) { uint32_tdwSectorPos; uint16_twSectorOffset; uint16_twSectorRemain; uint16_t i; uint8_t *SpiFlash_BUF; SpiFlash_BUF =SpiFlash_SectorBuf; dwSectorPos = dwWriteAddr / SPIF_SECTOR_SIZE;// sector address wSectorOffset= dwWriteAddr % SPIF_SECTOR_SIZE; // address offset in a sector wSectorRemain= SPIF_SECTOR_SIZE - wSectorOffset; // the remain in a sector if(dwNumByteToWrite <= wSectorRemain) { wSectorRemain = dwNumByteToWrite; // smaller than a sector size } while(1) { SpiFlash_Read(SpiFlash_BUF, dwSectorPos * SPIF_SECTOR_SIZE,SPIF_SECTOR_SIZE); // read a sector for(i=0;i<wSectorRemain; i++) // validate the read erea { if(SpiFlash_BUF[wSectorOffset + i]!=0xFF) { break;//t here are some data not equal 0xFF, so this secotr needs erased } } if(i <wSectorRemain) // need erase { SpiFlash_Erase_Sector(dwSectorPos); //erase the sector for(i=0;i<wSectorRemain; i++) // copy the write data { SpiFlash_BUF[i+wSectorOffset] = pbBuffer; } SpiFlash_Write_NoCheck(SpiFlash_BUF, dwSectorPos * SPIF_SECTOR_SIZE,SPIF_SECTOR_SIZE); // program the sector } else { SpiFlash_Write_NoCheck(pbBuffer, dwWriteAddr, wSectorRemain); // writedirectly in the erased area } if(dwNumByteToWrite == wSectorRemain) { break; //write end } else // goon writing { dwSectorPos++; wSectorOffset = 0; pbBuffer+= wSectorRemain; dwWriteAddr += wSectorRemain; dwNumByteToWrite -= wSectorRemain; if(dwNumByteToWrite > SPIF_SECTOR_SIZE) { wSectorRemain = SPIF_SECTOR_SIZE; // Could not write the remain data inthe next sector } else { wSectorRemain = dwNumByteToWrite; // Could write the remain data in thenext sector } } } } /** * @brief Read data from flash * @param pbBuffer: buffer name * @param dwReadAddr: buffer address * @param dwNumByteToRead: buffer length * @retval none */ void SpiFlash_Read(uint8_t* pbBuffer, uint32_tdwReadAddr, uint32_t dwNumByteToRead) { FLASH_CS_LOW(); SPI_WriteByte(SPIF_ReadData); // send instruction SPI_WriteByte((uint8_t)((dwReadAddr) >> 16)); //send 24-bitaddress SPI_WriteByte((uint8_t)((dwReadAddr) >> 8)); SPI_WriteByte((uint8_t)dwReadAddr); SPI_ReadBytes(pbBuffer,dwNumByteToRead); FLASH_CS_HIGH(); } /** * @brief Erase a sector data * @param dwDstAddr: Sector address to erase * @retval none */ void SpiFlash_Erase_Sector(uint32_t dwDstAddr) { dwDstAddr*=SPIF_SECTOR_SIZE; // translatesector address to byte address SpiFlash_Write_Enable(); SpiFlash_Wait_Busy(); FLASH_CS_LOW(); SPI_WriteByte(SPIF_SectorErase); SPI_WriteByte((uint8_t)((dwDstAddr) >> 16)); SPI_WriteByte((uint8_t)((dwDstAddr)>> 8)); SPI_WriteByte((uint8_t)dwDstAddr); FLASH_CS_HIGH(); SpiFlash_Wait_Busy(); } /** * @brief Write data without check * @param pbBuffer: buffer name * @param dwWriteAddr: buffer address * @param dwNumByteToWrite: buffer length * @retval none */ void SpiFlash_Write_NoCheck(uint8_t* pbBuffer,uint32_t dwWriteAddr, uint32_t dwNumByteToWrite) { uint16_twPageRemain; wPageRemain=SPIF_PAGE_SIZE - dwWriteAddr % SPIF_PAGE_SIZE; // remainbytes in a page if(dwNumByteToWrite<=wPageRemain) { wPageRemain=dwNumByteToWrite;// smaller than a page size } while(1) { SpiFlash_Write_Page(pbBuffer, dwWriteAddr, wPageRemain); if(dwNumByteToWrite==wPageRemain) { break; //all data are programmed } else// NumByteToWrite>pageremain { pbBuffer+= wPageRemain; dwWriteAddr += wPageRemain; dwNumByteToWrite -= wPageRemain; // the remain bytes to be prorammed if(dwNumByteToWrite > SPIF_PAGE_SIZE) { wPageRemain = SPIF_PAGE_SIZE; // can be progrmmed a page at a time } else { wPageRemain = dwNumByteToWrite; // smaller than a page size } } } } /** * @brief Write a page data * @param pbBuffer: buffer name * @param dwWriteAddr: buffer address * @param dwNumByteToWrite: buffer length * @retval none */ void SpiFlash_Write_Page(uint8_t* pbBuffer, uint32_tdwWriteAddr, uint32_t dwNumByteToWrite) { if((0 < dwNumByteToWrite)&& (dwNumByteToWrite <= SPIF_PAGE_SIZE)) { SpiFlash_Write_Enable(); // SET WEL FLASH_CS_LOW(); SPI_WriteByte(SPIF_PageProgram); // send instruction SPI_WriteByte((uint8_t)((dwWriteAddr) >> 16)); // send 24-bitaddress SPI_WriteByte((uint8_t)((dwWriteAddr) >> 8)); SPI_WriteByte((uint8_t)dwWriteAddr); SPI_WriteBytes(pbBuffer,dwNumByteToWrite); FLASH_CS_HIGH(); SpiFlash_Wait_Busy(); // Wait for program end } } /** * @brief Write data continuously * @param pbBuffer: buffer name * @param dwNumByteToWrite: buffer length * @retval none */ static void SPI_WriteBytes(uint8_t* pbBuffer, uint32_tdwNumByteToWrite) { volatileuint8_t dummy_data; #if (SPI_MODE == 0) DMA_InitTypeDMA_InitStructure; DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t)(&FLASH_SPI->DT); DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&dummy_data; DMA_InitStructure.DMA_Direction = DMA_DIR_PERIPHERALSRC; DMA_InitStructure.DMA_BufferSize = dwNumByteToWrite; DMA_InitStructure.DMA_PeripheralInc = DMA_PERIPHERALINC_DISABLE; DMA_InitStructure.DMA_MemoryInc = DMA_MEMORYINC_DISABLE; DMA_InitStructure.DMA_PeripheralDataWidth =DMA_PERIPHERALDATAWIDTH_BYTE; DMA_InitStructure.DMA_MemoryDataWidth = DMA_MEMORYDATAWIDTH_BYTE; DMA_InitStructure.DMA_Mode = DMA_MODE_NORMAL; DMA_InitStructure.DMA_Priority = DMA_PRIORITY_VERYHIGH; DMA_InitStructure.DMA_MTOM = DMA_MEMTOMEM_DISABLE; DMA_Init(SPIx_Rx_DMA_Channel, &DMA_InitStructure); DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t)(&FLASH_SPI->DT); DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)pbBuffer; DMA_InitStructure.DMA_Direction = DMA_DIR_PERIPHERALDST; DMA_InitStructure.DMA_BufferSize = dwNumByteToWrite; DMA_InitStructure.DMA_PeripheralInc = DMA_PERIPHERALINC_DISABLE; DMA_InitStructure.DMA_MemoryInc = DMA_MEMORYINC_ENABLE; DMA_InitStructure.DMA_PeripheralDataWidth =DMA_PERIPHERALDATAWIDTH_BYTE; DMA_InitStructure.DMA_MemoryDataWidth = DMA_MEMORYDATAWIDTH_BYTE; DMA_InitStructure.DMA_Mode = DMA_MODE_NORMAL; DMA_InitStructure.DMA_Priority = DMA_PRIORITY_VERYHIGH; DMA_InitStructure.DMA_MTOM = DMA_MEMTOMEM_DISABLE; DMA_Init(SPIx_Tx_DMA_Channel, &DMA_InitStructure); SPI_I2S_DMAEnable(FLASH_SPI,SPI_I2S_DMA_TX,ENABLE); SPI_I2S_DMAEnable(FLASH_SPI, SPI_I2S_DMA_RX,ENABLE); DMA_ChannelEnable(SPIx_Rx_DMA_Channel, ENABLE); DMA_ChannelEnable(SPIx_Tx_DMA_Channel, ENABLE); while(DMA_GetFlagStatus(SPIx_Rx_DMA_FLAG) != SET); DMA_ClearFlag(SPIx_Rx_DMA_FLAG); DMA_ChannelEnable(SPIx_Tx_DMA_Channel, DISABLE); DMA_ChannelEnable(SPIx_Rx_DMA_Channel, DISABLE); SPI_I2S_DMAEnable(FLASH_SPI, SPI_I2S_DMA_RX, DISABLE); SPI_I2S_DMAEnable(FLASH_SPI, SPI_I2S_DMA_TX, DISABLE); #else while(dwNumByteToWrite--) { while(SPI_I2S_GetFlagStatus(FLASH_SPI, SPI_I2S_FLAG_TE) == RESET); SPI_I2S_TxData(FLASH_SPI, *pbBuffer); while(SPI_I2S_GetFlagStatus(FLASH_SPI, SPI_I2S_FLAG_RNE) == RESET); dummy_data =SPI_I2S_RxData(FLASH_SPI); pbBuffer ++; } #endif } /** * @brief Wait program done * @param none * @retval none */ static void SpiFlash_Wait_Busy(void) { while((SpiFlash_ReadSR1()&0x01)== 0x01); } /** * @brief Read SR1 register * @param none * @retval none */ static uint8_t SpiFlash_ReadSR1(void) { uint8_tbReadByte=0; FLASH_CS_LOW(); SPI_WriteByte(SPIF_ReadStatusReg1); bReadByte=(uint8_t)SPI_ReadByte(); FLASH_CS_HIGH(); return(bReadByte); } /** * @brief Enable write operation * @param none * @retval none */ static void SpiFlash_Write_Enable(void) { FLASH_CS_LOW(); SPI_WriteByte(SPIF_WriteEnable); FLASH_CS_HIGH(); } /** * @brief Read device ID * @param none * @retvaldevice ID */ uint16_t SpiFlash_ReadID(void) { uint16_twReceiveData = 0; FLASH_CS_LOW(); SPI_WriteByte(SPIF_ManufactDeviceID); SPI_WriteByte(0x00); SPI_WriteByte(0x00); SPI_WriteByte(0x00); wReceiveData|=SPI_ReadByte() << 8; wReceiveData|=SPI_ReadByte(); FLASH_CS_HIGH(); returnwReceiveData; } /** * @brief Write a byte to flash * @param bWriteValue: Data to write * @retvalFlash return data */ static uint8_t SPI_WriteByte(uint8_t bWriteValue) { uint8_tbRxBuff; SPI_I2S_DMAEnable(FLASH_SPI, SPI_I2S_DMA_TX, DISABLE); SPI_I2S_DMAEnable(FLASH_SPI, SPI_I2S_DMA_RX, DISABLE); SPI_I2S_TxData(FLASH_SPI, bWriteValue); while(!SPI_I2S_GetFlagStatus(FLASH_SPI, SPI_I2S_FLAG_RNE)); bRxBuff = SPI_I2S_RxData(FLASH_SPI); while(SPI_I2S_GetFlagStatus(FLASH_SPI, SPI_I2S_FLAG_BUSY)); returnbRxBuff; } /** * @brief Read a byte to flash * @param none * @retvalFlash return data */ static uint8_t SPI_ReadByte(void) { return(SPI_WriteByte(FLASH_SPI_DUMMY_BYTE)); } /** * @brief Read data continuously * @param pbBuffer: Buffer to save data * @param dwNumByteToRead: Buffer length * @retval none */ static void SPI_ReadBytes(uint8_t *pbBuffer, uint32_tdwNumByteToRead) { uint8_tbWriteValue = FLASH_SPI_DUMMY_BYTE; #if (SPI_MODE == 0) DMA_InitTypeDMA_InitStructure; DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t)(&FLASH_SPI->DT); DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&bWriteValue; DMA_InitStructure.DMA_Direction = DMA_DIR_PERIPHERALDST; DMA_InitStructure.DMA_BufferSize = dwNumByteToRead; DMA_InitStructure.DMA_PeripheralInc = DMA_PERIPHERALINC_DISABLE; DMA_InitStructure.DMA_MemoryInc = DMA_MEMORYINC_DISABLE; DMA_InitStructure.DMA_PeripheralDataWidth =DMA_PERIPHERALDATAWIDTH_BYTE; DMA_InitStructure.DMA_MemoryDataWidth = DMA_MEMORYDATAWIDTH_BYTE; DMA_InitStructure.DMA_Mode = DMA_MODE_NORMAL; DMA_InitStructure.DMA_Priority = DMA_PRIORITY_VERYHIGH; DMA_InitStructure.DMA_MTOM = DMA_MEMTOMEM_DISABLE; DMA_Init(SPIx_Tx_DMA_Channel, &DMA_InitStructure); DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t)(&FLASH_SPI->DT); DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)pbBuffer; DMA_InitStructure.DMA_Direction= DMA_DIR_PERIPHERALSRC; DMA_InitStructure.DMA_BufferSize = dwNumByteToRead; DMA_InitStructure.DMA_PeripheralInc = DMA_PERIPHERALINC_DISABLE; DMA_InitStructure.DMA_MemoryInc = DMA_MEMORYINC_ENABLE; DMA_InitStructure.DMA_PeripheralDataWidth =DMA_PERIPHERALDATAWIDTH_BYTE; DMA_InitStructure.DMA_MemoryDataWidth = DMA_MEMORYDATAWIDTH_BYTE; DMA_InitStructure.DMA_Mode = DMA_MODE_NORMAL; DMA_InitStructure.DMA_Priority = DMA_PRIORITY_VERYHIGH; DMA_InitStructure.DMA_MTOM = DMA_MEMTOMEM_DISABLE; DMA_Init(SPIx_Rx_DMA_Channel, &DMA_InitStructure); SPI_I2S_DMAEnable(FLASH_SPI,SPI_I2S_DMA_TX, ENABLE); SPI_I2S_DMAEnable(FLASH_SPI,SPI_I2S_DMA_RX, ENABLE); DMA_ChannelEnable(SPIx_Rx_DMA_Channel, ENABLE); DMA_ChannelEnable(SPIx_Tx_DMA_Channel, ENABLE); while(DMA_GetFlagStatus(SPIx_Rx_DMA_FLAG)!=SET); DMA_ClearFlag(SPIx_Rx_DMA_FLAG); DMA_ChannelEnable(SPIx_Tx_DMA_Channel, DISABLE); DMA_ChannelEnable(SPIx_Rx_DMA_Channel, DISABLE); SPI_I2S_DMAEnable(FLASH_SPI,SPI_I2S_DMA_TX, DISABLE); SPI_I2S_DMAEnable(FLASH_SPI, SPI_I2S_DMA_RX, DISABLE); #else while(dwNumByteToRead--) { while(SPI_I2S_GetFlagStatus(FLASH_SPI, SPI_I2S_FLAG_TE) == RESET); SPI_I2S_TxData(FLASH_SPI, bWriteValue); while(SPI_I2S_GetFlagStatus(FLASH_SPI, SPI_I2S_FLAG_RNE) == RESET); *pbBuffer =SPI_I2S_RxData(FLASH_SPI); pbBuffer++; } #endif /* SPI_MODE */ }
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