EEPROM.rar_eeprom_stc12c5a60s2_stc12c5a60s2 EEPROM

#include <stc12c5a60s2.h> #include <intrins.h> typedef unsigned char BYTE; typedef unsigned int WORD; /*Define ISP/IAP/EEPROM command*/ #define CMD_IDLE 0 //Stand-By #define CMD_READ 1 //Byte-Read #define CMD_PROGRAM 2 //Byte-Program #define CMD_ERASE 3 //Sector-Erase /*Define ISP/IAP/EEPROM operation const for IAP_CONTR*/ //#define ENABLE_IAP 0x80 //if SYSCLK<30MHz //#define ENABLE_IAP 0x81 //if SYSCLK<24MHz #define ENABLE_IAP 0x82 //if SYSCLK<20MHz //#define ENABLE_IAP 0x83 //if SYSCLK<12MHz //#define ENABLE_IAP 0x84 //if SYSCLK<6MHz //#define ENABLE_IAP 0x85 //if SYSCLK<3MHz //#define ENABLE_IAP 0x86 //if SYSCLK<2MHz //#define ENABLE_IAP 0x87 //if SYSCLK<1MHz //Start address for STC12C5A60S2 series EEPROM #define IAP_ADDRESS 0x0000 void Delay(BYTE n); void IapIdle(); BYTE IapReadByte(WORD addr); void IapProgramByte(WORD addr, BYTE dat); void IapEraseSector(WORD addr); void main() { WORD i; P1 = 0xfe; //1111,1110 System Reset OK Delay(10); //Delay IapEraseSector(IAP_ADDRESS); //Erase current sector for (i=0; i<512; i++) //Check whether all sector data is FF { if (IapReadByte(IAP_ADDRESS+i) != 0xff) goto Error; //If error, break } P1 = 0xfc; //1111,1100 Erase successful Delay(10); //Delay for (i=0; i<512; i++) //Program 512 bytes data into data flash { IapProgramByte(IAP_ADDRESS+i, (BYTE)i); } P1 = 0xf8; //1111,1000 Program successful Delay(10); //Delay for (i=0; i<512; i++) //Verify 512 bytes data { if (IapReadByte(IAP_ADDRESS+i) != (BYTE)i) goto Error; //If error, break } P1 = 0xf0; //1111,0000 Verify successful while (1); Error: P1 &= 0x7f; //0xxx,xxxx IAP operation fail while (1); } /*---------------------------- Software delay function ----------------------------*/ void Delay(BYTE n) { WORD x; while (n--) { x = 0; while (++x); } } /*----------------------------Disable ISP/IAP/EEPROM function Make MCU in a safe state ----------------------------*/ void IapIdle() { IAP_CONTR = 0; //Close IAP function IAP_CMD = 0; //Clear command to standby IAP_TRIG = 0; //Clear trigger register IAP_ADDRH = 0x80; //Data ptr point to non-EEPROM area IAP_ADDRL = 0; //Clear IAP address to prevent misuse } /*----------------------------Read one byte from ISP/IAP/EEPROM area Input: addr (ISP/IAP/EEPROM address) Output:Flash data ----------------------------*/ BYTE IapReadByte(WORD addr) { BYTE dat; //Data buffer IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time IAP_CMD = CMD_READ; //Set ISP/IAP/EEPROM READ command IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high IAP_TRIG = 0x5a; //Send trigger command1 (0x5a) IAP_TRIG = 0xa5; //Send trigger command2 (0xa5) _nop_(); //MCU will hold here until ISP/IAP/EEPROM //operation complete dat = IAP_DATA; //Read ISP/IAP/EEPROM data IapIdle(); //Close ISP/IAP/EEPROM function return dat; //Return Flash data } /*---------------------------- Program one byte to ISP/IAP/EEPROM area Input: addr (ISP/IAP/EEPROM address) dat (ISP/IAP/EEPROM data) Output:-----------------------------*/ void IapProgramByte(WORD addr, BYTE dat) { IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time IAP_CMD = CMD_PROGRAM; //Set ISP/IAP/EEPROM PROGRAM command IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high IAP_DATA = dat; //Write ISP/IAP/EEPROM data IAP_TRIG = 0x5a; //Send trigger command1 (0x5a) IAP_TRIG = 0xa5; //Send trigger command2 (0xa5) _nop_(); //MCU will hold here until ISP/IAP/EEPROM //operation complete IapIdle(); } /*---------------------------- Erase one sector area Input: addr (ISP/IAP/EEPROM address) Output:- ----------------------------*/ void IapEraseSector(WORD addr) { IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time IAP_CMD = CMD_ERASE; //Set ISP/IAP/EEPROM ERASE command IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high IAP_TRIG = 0x5a; //Send trigger command1 (0x5a) IAP_TRIG = 0xa5; //Send trigger command2 (0xa5) _nop_(); //MCU will hold here until ISP/IAP/EEPROM //operation complete IapIdle(); }