I2C.rar_I2C驱动文件

#include "24cxx.h" #include "delay.h" #include "sys.h" #include "kg_info.h" ////////////////////////////////////////////////////////////////////////////////// //本程序只供学习使用，未经作者许可，不得用于其它任何用途 //ALIENTEK战舰STM32开发板 //24CXX驱动 代码(适合24C01~24C16,24C32~256未经过测试!有待验证!) //正点原子@ALIENTEK //技术论坛:www.openedv.com //修改日期:2012/9/9 //版本：V1.0 //版权所有，盗版必究。 //Copyright(C) 广州市星翼电子科技有限公司 2009-2019 //All rights reserved ////////////////////////////////////////////////////////////////////////////////// static uint8_t D9_L_FACTORY[49] = {0x0B,0x00,0x00,0x01,0x00,0x00,0x01,0x00, 0x00,0x00,0x00,0x00,0x04,0x00,0x02,0x02, 0x02,0x02,0x02,0x02,0x03,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x04, 0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00}; static uint8_t D9_C_FACTORY[49] = {0x0B,0x00,0x00,0x04,0x00,0x00,0x01,0x00, 0x00,0x00,0x00,0x02,0x00,0x00,0x02,0x02, 0x02,0x02,0x02,0x02,0x03,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x04, 0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00}; static uint8_t D9_CG_FACTORY[49] = {0x0B,0x00,0x00,0x05,0x00,0x00,0x01,0x00, 0x00,0x00,0x00,0x02,0x00,0x00,0x02,0x02, 0x02,0x02,0x02,0x02,0x03,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x04, 0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00}; static uint8_t D9_D_FACTORY[49] = {0x0B,0x00,0x00,0x02,0x00,0x00,0x01,0x00, 0x00,0x00,0x00,0x02,0x00,0x00,0x02,0x02, 0x02,0x02,0x02,0x02,0x03,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x04, 0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00}; //初始化IIC接口 void AT24CXX_Init(void) { IIC_Init(); } //在AT24CXX指定地址读出一个数据 //ReadAddr:开始读数的地址 //返回值 :读到的数据 u8 AT24CXX_ReadOneByte(u16 ReadAddr) { u8 temp=0; IIC_Start(); if(EE_TYPE>AT24C16) { IIC_Send_Byte(0XA0); //发送写命令 IIC_Wait_Ack(); IIC_Send_Byte(ReadAddr>>8);//发送高地址 IIC_Wait_Ack(); }else IIC_Send_Byte(0XA0+((ReadAddr/256)<<1)); //发送器件地址0XA0,写数据 IIC_Wait_Ack(); IIC_Send_Byte(ReadAddr%256); //发送低地址 IIC_Wait_Ack(); IIC_Start(); IIC_Send_Byte(0XA1); //进入接收模式 IIC_Wait_Ack(); temp=IIC_Read_Byte(0); IIC_Stop();//产生一个停止条件 return temp; } //在AT24CXX指定地址写入一个数据 //WriteAddr :写入数据的目的地址 //DataToWrite:要写入的数据 void AT24CXX_WriteOneByte(u16 WriteAddr,u8 DataToWrite) { IIC_Start(); if(EE_TYPE>AT24C16) { IIC_Send_Byte(0XA0); //发送写命令 IIC_Wait_Ack(); IIC_Send_Byte(WriteAddr>>8);//发送高地址 }else { IIC_Send_Byte(0XA0+((WriteAddr/256)<<1)); //发送器件地址0XA0,写数据 } IIC_Wait_Ack(); IIC_Send_Byte(WriteAddr%256); //发送低地址 IIC_Wait_Ack(); IIC_Send_Byte(DataToWrite); //发送字节 IIC_Wait_Ack(); IIC_Stop();//产生一个停止条件 delay_ms(10); } //在AT24CXX里面的指定地址开始写入长度为Len的数据 //该函数用于写入16bit或者32bit的数据. //WriteAddr :开始写入的地址 //DataToWrite:数据数组首地址 //Len :要写入数据的长度2,4 void AT24CXX_WriteLenByte(u16 WriteAddr,u32 DataToWrite,u8 Len) { u8 t; for(t=0;t<Len;t++) { AT24CXX_WriteOneByte(WriteAddr+t,(DataToWrite>>(8*t))&0xff); } } //在AT24CXX里面的指定地址开始读出长度为Len的数据 //该函数用于读出16bit或者32bit的数据. //ReadAddr :开始读出的地址 //返回值 :数据 //Len :要读出数据的长度2,4 u32 AT24CXX_ReadLenByte(u16 ReadAddr,u8 Len) { u8 t; u32 temp=0; for(t=0;t<Len;t++) { temp<<=8; temp+=AT24CXX_ReadOneByte(ReadAddr+Len-t-1); } return temp; } void board_store_format(void) { unsigned int i = 0; unsigned char write[256] = {0x00}; unsigned int pos = 0; for (i = 0; i < 8; i++) {//2k 8 AT24CXX_Write(pos, write, 256); pos += sizeof(write); } } //检查AT24CXX是否正常 //这里用了24XX的最后一个地址(255)来存储标志字. //如果用其他24C系列,这个地址要修改 //返回1:检测失败 //返回0:检测成功 u8 AT24CXX_Check(void) { uint8_t read = 0x00; read = AT24CXX_ReadOneByte(0); LOG("read first %02x\r\n",read); if (0x01 == read) { return 0; } AT24CXX_WriteOneByte(0,0x55); read = AT24CXX_ReadOneByte(0); LOG("read second %02x\r\n",read); if (0x55 == read) { board_store_format(); AT24CXX_WriteOneByte(0, 0x01); #if defined(SYS_KG_TYPE_D9_L) AT24CXX_Write(STORE_SCR_NFC_SAVE_BASE,D9_L_FACTORY, 49); #elif defined(SYS_KG_TYPE_D9_C) AT24CXX_Write(STORE_SCR_NFC_SAVE_BASE,D9_C_FACTORY, 49); #elif defined(SYS_KG_TYPE_D9_CG) AT24CXX_Write(STORE_SCR_NFC_SAVE_BASE,D9_CG_FACTORY,49); #elif defined(SYS_KG_TYPE_D9_D) AT24CXX_Write(STORE_SCR_NFC_SAVE_BASE,D9_D_FACTORY, 49); #else #error "not define system switch type for flash factory" #endif LOG("flash first use\r\n"); return 0; } return 1; } //在AT24CXX里面的指定地址开始读出指定个数的数据 //ReadAddr :开始读出的地址 对24c02为0~255 //pBuffer :数据数组首地址 //NumToRead:要读出数据的个数 void AT24CXX_Read(u16 ReadAddr,u8 *pBuffer,u16 NumToRead) { while(NumToRead) { *pBuffer++=AT24CXX_ReadOneByte(ReadAddr++); NumToRead--; } } //在AT24CXX里面的指定地址开始写入指定个数的数据 //WriteAddr :开始写入的地址 对24c02为0~255 //pBuffer :数据数组首地址 //NumToWrite:要写入数据的个数 void AT24CXX_Write(u16 WriteAddr,u8 *pBuffer,u16 NumToWrite) { while(NumToWrite--) { AT24CXX_WriteOneByte(WriteAddr,*pBuffer); WriteAddr++; pBuffer++; } }