90 lines
3.7 KiB
C
90 lines
3.7 KiB
C
/*------------------------------------------------------------------*/
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/* --- STC MCU Limited ---------------------------------------------*/
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/* --- STC89-90xx Series MCU ISP/IAP/EEPROM Demo -------------------*/
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/* --- Mobile: (86)13922805190 -------------------------------------*/
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/* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/
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/* --- Tel: 86-0513-55012928,55012929,55012966----------------------*/
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/* --- Web: www.STCMCU.com -----------------------------------------*/
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/* --- Web: www.GXWMCU.com -----------------------------------------*/
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/* If you want to use the program or the program referenced in the */
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/* article, please specify in which data and procedures from STC */
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/*------------------------------------------------------------------*/
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#include "reg51.h"
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#include "intrins.h"
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#include "eeprom.h"
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#include "delay.h"
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/*----------------------------
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Disable ISP/IAP/EEPROM function
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Make MCU in a safe state
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----------------------------*/
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void IapIdle()
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{
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IAP_CONTR = 0; //Close IAP function
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IAP_CMD = 0; //Clear command to standby
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IAP_TRIG = 0; //Clear trigger register
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IAP_ADDRH = 0x80; //Data ptr point to non-EEPROM area
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IAP_ADDRL = 0; //Clear IAP address to prevent misuse
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}
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/*----------------------------
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Read one byte from ISP/IAP/EEPROM area
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Input: addr (ISP/IAP/EEPROM address)
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Output:Flash data
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----------------------------*/
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BYTE IapReadByte(WORD addr)
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{
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BYTE dat; //Data buffer
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IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time
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IAP_CMD = CMD_READ; //Set ISP/IAP/EEPROM READ command
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IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low
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IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high
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IAP_TRIG = 0x46; //Send trigger command1 (0x46)
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IAP_TRIG = 0xb9; //Send trigger command2 (0xb9)
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_nop_(); //MCU will hold here until ISP/IAP/EEPROM operation complete
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dat = IAP_DATA; //Read ISP/IAP/EEPROM data
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IapIdle(); //Close ISP/IAP/EEPROM function
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return dat; //Return Flash data
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}
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/*----------------------------
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Program one byte to ISP/IAP/EEPROM area
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Input: addr (ISP/IAP/EEPROM address)
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dat (ISP/IAP/EEPROM data)
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Output:-
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----------------------------*/
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void IapProgramByte(WORD addr, BYTE dat)
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{
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IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time
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IAP_CMD = CMD_PROGRAM; //Set ISP/IAP/EEPROM PROGRAM command
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IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low
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IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high
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IAP_DATA = dat; //Write ISP/IAP/EEPROM data
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IAP_TRIG = 0x46; //Send trigger command1 (0x46)
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IAP_TRIG = 0xb9; //Send trigger command2 (0xb9)
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_nop_(); //MCU will hold here until ISP/IAP/EEPROM operation complete
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IapIdle();
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delayms(10);
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}
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/*----------------------------
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Erase one sector area
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Input: addr (ISP/IAP/EEPROM address)
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Output:-
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----------------------------*/
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void IapEraseSector(WORD addr)
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{
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IAP_CONTR = ENABLE_IAP; //Open IAP function, and set wait time
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IAP_CMD = CMD_ERASE; //Set ISP/IAP/EEPROM ERASE command
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IAP_ADDRL = addr; //Set ISP/IAP/EEPROM address low
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IAP_ADDRH = addr >> 8; //Set ISP/IAP/EEPROM address high
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IAP_TRIG = 0x46; //Send trigger command1 (0x46)
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IAP_TRIG = 0xb9; //Send trigger command2 (0xb9)
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_nop_(); //MCU will hold here until ISP/IAP/EEPROM operation complete
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IapIdle();
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delayms(10);
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}
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