EEPROM驱动基于STM32hal库

/** ****************************************************************************** * @file eeprom.c * @author Tony Li * @brief *EEPROM的驱动函数采用的HAL_I2C的MEM读写函数，驱动函数可以完成页内写，全区域读取。 *EEPROM_BufferWrite()实现了eeprom全地址写操作。 *支持24c01,24c02,24c04,24c08,24c16。 *24C32及以上需要调整为16地址模块 *写操作中，页切换的延时时间设计的是8mS。 *读写失败则退出，不影响系统其它模块执行。 ****************************************************************************** * @attention * * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "eeprom.h" #include "sys.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ extern I2C_HandleTypeDef hi2c1; #define EEPROM_I2C_PORT hi2c1 #ifdef EEPROMTEST /* Buffer used for transmission */ uint8_t aTxBuffer[] = " ****I2C_TwoBoards communication based on Polling**** ****I2C_TwoBoards communication based on Polling**** ****I2C_TwoBoards communication based on Polling**** "; /* Buffer used for reception */ uint8_t aRxBuffer[RXBUFFERSIZE]; #define I2C_ADDRESS 0x0 /* Size of Transmission buffer */ #define TXBUFFERSIZE (COUNTOF(aTxBuffer) - 1) #define RXBUFFERSIZE TXBUFFERSIZE static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength); #endif bool eepromInit(void) { EEPROMWrEnable(); return true; } bool EEPROM_BufferWrite(uint8_t *pBuffer,uint16_t WriteAddr,uint16_t NumByte){ uint16_t Amount_Page,PageBegin;//要写入的页数,页内起始地址 uint8_t Amount_Byte;//按页写入数据剩余的字节数 uint8_t count;//写入计数 uint16_t AddrBegin; PageBegin=WriteAddr/EEPROMPAGESIZE;//起始页数 AddrBegin=WriteAddr%EEPROMPAGESIZE;//页内偏移地址 count=EEPROMPAGESIZE-AddrBegin;//页内写入数量 Amount_Byte=0; EEPROMWrEnable(); if(AddrBegin+NumByte<=EEPROMPAGESIZE)//写入的内容不跨页 { if(PwrGood()!=true) return HAL_ERROR; if(HAL_I2C_Mem_Write(&EEPROM_I2C_PORT,M24CxxDevAddr|(WriteAddr>>7&0xfe), (uint16_t) WriteAddr, (uint16_t)MEMADDRSIZE, pBuffer, (uint16_t)NumByte, (uint32_t)EEPROMTIMOUT)==HAL_OK){ delay_ms(8); return true; } else return false; } else //跨页写 { //写入第一页 PageBegin=WriteAddr; count=EEPROMPAGESIZE-AddrBegin; if(PwrGood()!=true) return false; if(HAL_I2C_Mem_Write(&EEPROM_I2C_PORT,M24CxxDevAddr|(PageBegin>>7&0xfe), \ (uint16_t) PageBegin, (uint16_t)MEMADDRSIZE, pBuffer, (uint16_t)count, (uint32_t)EEPROMTIMOUT)!=HAL_OK) { return false; } delay_ms(20); PageBegin+=count; pBuffer+=count; NumByte-=count; Amount_Page=NumByte/EEPROMPAGESIZE; Amount_Byte=NumByte%EEPROMPAGESIZE; //写入后续满页 if(Amount_Page!=0) { do { if(PwrGood()!=true) return false; if(HAL_I2C_Mem_Write(&EEPROM_I2C_PORT,M24CxxDevAddr|(PageBegin>>7&0xfe), \ (uint16_t) PageBegin, (uint16_t)MEMADDRSIZE, pBuffer, (uint16_t)EEPROMPAGESIZE, (uint32_t)EEPROMTIMOUT)!=HAL_OK) { return HAL_ERROR; } else { delay_ms(20); Amount_Page--; PageBegin+=EEPROMPAGESIZE; NumByte-=EEPROMPAGESIZE; pBuffer+=EEPROMPAGESIZE; } } while(Amount_Page!=0); } //写入尾页 if(NumByte>0) { if(PwrGood()!=true) return false; if(HAL_I2C_Mem_Write(&EEPROM_I2C_PORT,M24CxxDevAddr|(PageBegin>>7&0xfe), \ (uint16_t) PageBegin, (uint16_t)MEMADDRSIZE, pBuffer, (uint16_t)NumByte, (uint32_t)EEPROMTIMOUT)!=HAL_OK) { return false; } else { delay_ms(8); return true; } } } return false; } bool EEPROM_BufRead(uint8_t *pBuffer,uint16_t ReadAddr,uint16_t NumByte){ uint8_t i; for(i=0;i<6;i++){ if(HAL_I2C_Mem_Read(&EEPROM_I2C_PORT,M24CxxDevAddr|(ReadAddr>>7&0xfe), (uint16_t) ReadAddr, (uint16_t)MEMADDRSIZE, pBuffer, (uint16_t)NumByte, (uint32_t)EEPROMTIMOUT)==HAL_OK){ return true; } else { delay_ms(5); if(i>=6) return false; } } return false; } #ifdef EEPROMTEST /** * @brief Compares two buffers. * @param pBuffer1, pBuffer2: buffers to be compared. * @param BufferLength: buffer's length * @retval 0 : pBuffer1 identical to pBuffer2 * >0 : pBuffer1 differs from pBuffer2 */ static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength) { while (BufferLength--) { if ((*pBuffer1) != *pBuffer2) { return BufferLength; } pBuffer1++; pBuffer2++; } return 0; } void EEPROM_TEST(void){ EEPROM_BufferWrite(aTxBuffer,I2C_ADDRESS,RXBUFFERSIZE); EEPROM_BufRead(aRxBuffer,I2C_ADDRESS,RXBUFFERSIZE); Buffercmp(aTxBuffer,aRxBuffer,7); } #endif