【正文】 while(!I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BTF)) { if((sEETimeout) == 0) sEE_TIMEOUT_UserCallback()。 I2C_SR1_ADDR) { /* Clear ADDR Flag by reading SR1 then SR2 registers (SR1 have already been read) */ (void)sEE_I2CSR2。 while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT)) { if((sEETimeout) == 0) return sEE_TIMEOUT_UserCallback()。 } sEE_WaitEepromStandbyState()。 pBuffer += sEE_PAGESIZE。 sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(amp。 /* Wait transfer through DMA to be plete */ sEETimeout = sEE_LONG_TIMEOUT。}。}。}。}。 WriteAddr += sEE_PAGESIZE。 } /*! If NumByteToWrite sEE_PAGESIZE */ else { while(NumOfPage) { /* Store the number of data to be written */ sEEDataNum = sEE_PAGESIZE。 /*! If WriteAddr is sEE_PAGESIZE aligned */ if(Addr == 0) { /*! If NumByteToWrite sEE_PAGESIZE */ if(NumOfPage == 0) { /* Store the number of data to be written */ sEEDataNum = NumOfSingle。 /* If all operations OK, return sEE_OK (0) */ return sEE_OK。 while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) { if((sEETimeout) == 0) return sEE_TIMEOUT_UserCallback()。//0xa0 /*! Test on EV6 and clear it */ sEETimeout = sEE_FLAG_TIMEOUT。s internal address to write to. * param NumByteToWrite : pointer to the variable holding number of bytes to * be written into the EEPROM. * * note The variable pointed by NumByteToWrite is reset to 0 when all the * data are written to the EEPROM. Application should monitor this * variable in order know when the transfer is plete. * * note This function just configure the munication and enable the DMA * channel to transfer data. Meanwhile, the user application may perform * other tasks in parallel. * * retval sEE_OK (0) if operation is correctly performed, else return value * different from sEE_OK (0) or the timeout user callback. */uint32_t sEE_WritePage(uint8_t* pBuffer, uint16_t WriteAddr, uint8_t* NumByteToWrite){ /* Set the pointer to the Number of data to be written. This pointer will be used by the DMA Transfer Completer interrupt Handler in order to reset the variable to 0. User should check on this variable in order to know if the DMA transfer has been plete or not. */ sEEDataWritePointer = NumByteToWrite。 } else/* More than one Byte Master Reception procedure (DMA) */ { /*! Test on EV6 and clear it */ sEETimeout = sEE_FLAG_TIMEOUT。 /* Wait for the byte to be received */ sEETimeout = sEE_FLAG_TIMEOUT。 /* If number of data to be read is 1, then DMA couldn39。s internal address to read from: LSB of the address */ I2C_SendData(sEE_I2C, (uint8_t)(ReadAddr amp。 } ifdef sEE_M24C08 /*! Send the EEPROM39。 /*! While the bus is busy */ sEETimeout = sEE_LONG_TIMEOUT。 = I2C_AcknowledgedAddress_7bit。sEEDMA_InitStructure)。 = DMA_DIR_PeripheralDST。 DMA_Init(sEE_I2C_DMA_CHANNEL_TX, amp。 /* This parameter will be configured durig munication */ = 0xFFFF。 = sEE_I2C_DMA_SUBPRIO。 /* Configure and enable I2C DMA TX Channel interrupt */ = sEE_I2C_DMA_TX_IRQn。 /*! GPIO configuration */ /*! Configure sEE_I2C pins: SCL */ = sEE_I2C_SCL_PIN。 /* Disable and Deinitialize the DMA channels */ DMA_Cmd(sEE_I2C_DMA_CHANNEL_TX, DISABLE)。 = DISABLE。 GPIO_Init(sEE_I2C_SCL_GPIO_PORT, amp。DMA_InitTypeDef sEEDMA_InitStructure。t occur, bus errors, busy devices ...). You can use the default timeout callback implementation by unmenting the define USE_DEFAULT_TIMEOUT_CALLBACK in file. Typically the user implementation of this callback should reset I2C peripheral and reinitialize munication or in worst case reset all the application. */uint32_t sEE_TIMEOUT_UserCallback(void)。ifndef __AT24C256_Hdefine __AT24C256_H/* Includes */include ifdef __cplusplus extern C {endifdefine I2C_SPEED 300000define I2C_SLAVE_ADDRESS7 0xA0 define sEE_PAGESIZE 32/* Maximum number of trials for sEE_WaitEepromStandbyState() function */define sEE_MAX_TRIALS_NUMBER 150 /* Defintions for the state of the DMA transfer */ define sEE_STATE_READY 0define sEE_STATE_BUSY 1define sEE_STATE_ERROR 2 define sEE_OK 0define sEE_FAIL 1 define sEE_FLAG_TIMEOUT ((uint32_t)0x1000)define sEE_LONG_TIMEOUT ((uint32_t)(10 * sEE_FLAG_TIMEOUT))define sEE_I2C I2C1define sEE_I2C_CLK RCC_APB1Periph_I2C1define sEE_I2C_SCL_PIN GPIO_Pin_6 define sEE_I2C_SCL_GPIO_PORT GPIOB define sEE_I2C_SCL_GPIO_CLK RCC_APB2Periph_GPIOBdefine sEE_I2C_SDA_PIN GPIO_Pin_7 define sEE_I2C_SDA_GPIO_PORT GPIOB define sEE_I2C_SDA_GPIO_CLK RCC_APB2Periph_GPIOBdefine sEE_M24C64_32define sEE_I2C_DMA DMA1 define sEE_I2C_DMA_CHANNEL_TX DMA1_Channel6define sEE_I2C_DMA_CHANNEL_RX DMA1_Channel7 define sEE_I2C_DMA_FLAG_TX_TC DMA1_IT_TC6 define sEE_I2C_DMA_FLAG_TX_GL DMA1_IT_GL6 define sEE_I2C_DMA_FLAG_RX_TC DMA1_IT_TC7 define sEE_I2C_DMA_FLAG_RX_GL DMA1_IT_GL7 define sEE_I2C_DMA_CLK RCC_AHBPeriph_DMA1define sEE_I2C_DR_Address ((uint32_t)0x40005410)define sEE_USE_D