STC micro STC8A8K64D4 Series - Page 486

STC8A8K64D4 Series Manual
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C language code (EEPROM.c)
//Operating frequency for test is 11.0592MHz
// This program is the built-in EEPROM read and write program of STC series.
#include "config.h"
#include "eeprom.h"
//========================================================================
// Function: void ISP_Disable(void)
// Description: Disable access ISP/IAP.
// Parameters:non.
// Return: non.
// Version: V1.0, 2012-10-22
//========================================================================
void DisableEEPROM(void)
{
ISP_CONTR = 0; //Disable ISP/IAP operation
IAP_TPS = 0;
ISP_CMD = 0; //Remove ISP/IAP commands
ISP_TRIG = 0; //Prevent false triggering of ISP/IAP commands
ISP_ADDRH = 0xff; //Clear address high byte
ISP_ADDRL = 0xff; //Clear address low byte, point to non-EEPROM area to prevent
misoperation
}
//========================================================================
// Function: void EEPROM_read_n(u16 EE_address,u8 *DataAddress,u16 number)
// Description: Read n bytes from the specified EEPROM first address and put them in the specified buffer.
// Parameters:EE_address: The first address of the EEPROM to read.
// DataAddress: The first address of the data buffer.
// number: The length of bytes to read.
// Return: non.
// Version: V1.0, 2012-10-22
//========================================================================
void EEPROM_read_n(u16 EE_address,u8 *DataAddress,u16 number)
{
EA = 0; //Disable interrupts
ISP_CONTR = ISP_EN; //Allow ISP/IAP operation
IAP_TPS = (u8)(MAIN_Fosc / 1000000L); //Working frequency setting
ISP_READ(); //Send byte read command, when the command does not need to be
changed, there is no need to send the command again
do
{
ISP_ADDRH = EE_address / 256; //Send the high byte of the address (the address needs to be re-sent when
the address needs to be changed)
ISP_ADDRL = EE_address % 256; //Send the low byte of the address
ISP_TRIG(); //Send 5AH firstly, then send A5H to the ISP/IAP trigger register,
//Do this every time
//After sending A5H, the ISP/IAP command is triggered to start
immediately
//The CPU waits for the IAP to complete before continuing to execute
the program.
_nop_();
_nop_();
_nop_();