- int main(void)
- {
- fnInitLcd();
-
- i = fnReadEEByTable(2);
- fnDigiDisplay( i );
- fnEraseEE(2);
- fnWriteEE(2,6);
- while(1);
- }
-
- void fnWriteCmd(unsigned int Cmd)
- {
- NVMCON = Cmd;
-
- asm volatile ("push SR");
- asm volatile ("mov #0x00e0,w0");
- asm volatile ("ior SR");
- asm volatile ("mov #0x55,w0");
- asm volatile ("mov w0,NVMKEY");
- asm volatile ("mov #0xAA,w1");
- asm volatile ("mov w1,NVMKEY");
-
- asm("NOP");
- asm("NOP");
- asm volatile ("pop SR");
-
- NVMCONbits.WR = 1;
- while(NVMCONbits.WR == 1);
-
- }
- unsigned int fnReadEEByTable(unsigned int addr) //通过表读指令从EEPROM中读一行指令到RAM
- {
- unsigned int ReturnValue;
-
- TBLPAG = 0x7F;
- WREG0 = addr*2+0xfc00;
-
- asm volatile("TBLRDL [w0], w4");
-
- ReturnValue = WREG4;
- return ReturnValue;
-
- }
- void fnEraseEE(unsigned int OffsetAddr) // 擦除EEPROM中指定的一个字数据
- {
- NVMADRU = 0x7F;
- NVMADR = OffsetAddr*2+0xfc00;
-
- fnWriteCmd(EE_ERASE_WORD);
- NVMCONbits.WREN = 0;
- }
- void fnWriteEE(unsigned int OffsetAddr,unsigned int SourceArray) // 向EEPROM中指定的行写入一个字数据
- {
- WREG1 = SourceArray;
- WREG2 = OffsetAddr*2 + 0xfc00;
- asm volatile("TBLWTL.W w1, [w2]");
-
- fnWriteCmd(EE_WRITE_WORD);
- NVMCONbits.WREN = 0;
- }
但是擦不了写不上，不知道哪里的问题，求指点
| 
楼主
