STM32_IIC.rar_STM32 eeprom_STM32 模拟 IIC_stm32 IIC_stm32 EEPRO

/* Includes ------------------------------------------------------------------*/ #include "i2c.h" #include "stm32f10x.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define I2C_Speed 400000 #define I2C1_SLAVE_ADDRESS7 0xA0 #define I2C_PageSize 64 /*24C128,每页64个字节*/ #define EEPROM_Block0_ADDRESS 0xA0 /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ u16 EEPROM_ADDRESS; /* Private function prototypes -----------------------------------------------*/ //用来计算CRC16的表格 const u8 chCRCHTalbe[] = // CRC 高位字节值表 { 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 }; const u8 chCRCLTalbe[] = // CRC 低位字节值表 { 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40 }; /*计算crc16校验*/ u16 CRC16(u8* pchMsg, u16 wDataLen) { u8 chCRCHi = 0xFF; // 高CRC字节初始化 u8 chCRCLo = 0xFF; // 低CRC字节初始化 u16 wIndex; // CRC循环中的索引 while (wDataLen--) { // 计算CRC wIndex = chCRCLo ^ *pchMsg++; chCRCLo = chCRCHi ^ chCRCHTalbe[wIndex]; chCRCHi = chCRCLTalbe[wIndex]; } return ((chCRCHi << 8) | chCRCLo); } /******************************************************************************* * Function Name : I2C_EE_Init * Description : Initializes peripherals used by the I2C EEPROM driver. * Input : None * Output : None * Return : None *******************************************************************************/ void I2C_EE_Init() { /* depending on the EEPROM Address selected in the i2c_ee.h file */ #ifdef EEPROM_Block0_ADDRESS /* Select the EEPROM Block0 to write on */ EEPROM_ADDRESS = EEPROM_Block0_ADDRESS; #endif #ifdef EEPROM_Block1_ADDRESS /* Select the EEPROM Block1 to write on */ EEPROM_ADDRESS = EEPROM_Block1_ADDRESS; #endif #ifdef EEPROM_Block2_ADDRESS /* Select the EEPROM Block2 to write on */ EEPROM_ADDRESS = EEPROM_Block2_ADDRESS; #endif #ifdef EEPROM_Block3_ADDRESS /* Select the EEPROM Block3 to write on */ EEPROM_ADDRESS = EEPROM_Block3_ADDRESS; #endif } //u8 bEEprom_Buf[512]; //读写EEPROM的缓冲区 /* I2C*/ /*根据CPU的管脚设置，定义时钟引脚和数据引脚*/ #define SCL_H GPIOB->BSRR = GPIO_Pin_6 #define SCL_L GPIOB->BRR = GPIO_Pin_6 #define SDA_H GPIOB->BSRR = GPIO_Pin_7 #define SDA_L GPIOB->BRR = GPIO_Pin_7 //#define SCL_read GPIOB->IDR & GPIO_Pin_6 #define SDA_read GPIOB->IDR & GPIO_Pin_7 // iic中的延时参数 #define iic_delay 5 void delay_time(u16 count) { u16 i; for(i=0; i<count; i++); } //延迟 void delayMs(u32 value) { u32 i; for(i=0; i<value; i++); } //================================================================= // 进入时CLK为低，退出时CLK为低 // 写出ACK void EE_ACK(void) { SDA_L; delay_time(iic_delay); SCL_H; delay_time(iic_delay); SCL_L; delay_time(iic_delay); } void EE_NOACK(void) { SDA_H; delay_time(iic_delay); SCL_H; delay_time(iic_delay); SCL_L; delay_time(iic_delay); } //================================================================= // 进入时对CLK不关心，退出时CLK为低 void EE_start(void) { SDA_H; SCL_H; delay_time(iic_delay); SDA_L; delay_time(iic_delay); SCL_L; delay_time(iic_delay); } //================================================================= // 进入时CLK为低 void EE_stop(void) { SDA_L; SCL_H; delay_time(iic_delay); SDA_H; delay_time(iic_delay); SCL_L; //Edited by King CLK拉低 delay_time(iic_delay); } // 进入时CLK为低，退出时CLK为低 void EE_writebyte(u8 SendByte) //数据从高位到低位// { u8 i = 8; while(i--) { if(SendByte&0x80) SDA_H; else SDA_L; SendByte <<= 1; delay_time(iic_delay); SCL_H; delay_time(iic_delay); SCL_L; delay_time(iic_delay); } // wait ACK,没有检查ACK的准确性 SDA_H; delay_time(iic_delay); SCL_H; delay_time(iic_delay); SCL_L; delay_time(iic_delay); } // 进入时CLK为低，退出时CLK为低 u8 EE_readbyte(void) //数据从高位到低位// { u8 i = 8; u8 ReceiveByte = 0; SDA_H; //此位必须置高，否则无法读回数据 while(i--) { ReceiveByte <<= 1; SCL_H; delay_time(iic_delay); if(SDA_read) ReceiveByte |= 0x01; SCL_L; delay_time(iic_delay); } return ReceiveByte; } void EE_writeBuf(u8* pBuffer, u16 WriteAddr, u16 NumByteToWrite) { u8 addrH, addrL; u8 *p