pic18LF25K42 EEPROM程序

2万 · 2021-7-7 21:02

PIC18LF25K42芯片，采用MPLABX 的MCC找不到 EEPROM的资源，调用PIC18.H的EEPROM_READ(addr)，EEPROM_WRITE(addr, value)采用XC8(1.45)编译不能通过，于是看数据手册自编了EEPROM读写程序：
/*////////////////////////////////////////////////////////
函数名:unsigned char ReadEeprom(unsigned char address)
功       能: PIC18LF25K42 EEPROM读一字节数据适用EEPROM小于等于256字节
输       入:       无
输       出:       返回  地址address的1字节数据
修       改:
*///////////////////////////////////////////////////////////
unsigned char ReadEeprom(unsigned char address)
{
unsigned char temp;
NVMCON1 = 0;
NVMADRL = address;
NVMCON1bits.RD = 1;
temp = NVMDAT;
return  temp;
}
/*///////////////////////////////////////////////////////
函数名:void WriteEeprom(unsigned char addr ,unsigned char Data)
功       能: PIC18LF25K42 EEPROM写一字节数据适用EEPROM小于等于256字节
输       入:       addr EEPROM地址；addr EEPROM要写入的一个字节数据
输       出:       无
修       改:
*///////////////////////////////////////////////////////
void WriteEeprom(unsigned char addr ,unsigned char Data)
{
NVMCON1 = 0;       // Setup Data EEPROM Access
NVMADRL = addr ;    //Setup Address
                     //; Data Memory Value to write
NVMDAT  =  Data;
NVMCON1bits.WREN = 1; // enable writes
INTERRUPT_GlobalInterruptDisable(); //disable interrupts

NVMCON2 = 0x55; //unlock sequence
NVMCON2 = 0xAA; //unlock sequence
// Set WR bit to begin write
NVMCON1bits.WR = 1; //begin write
INTERRUPT_GlobalInterruptEnable(); //enable interrupts
NVMCON1bits.WREN = 0; // enable writes

}