PIC16F18344的EEPROM操作

只看该作者 · 2021-7-5 15:40

在使用PIC16F18344的内部eeprom时，写入数据，然后读出来，很多地址的数据都不对，这会什么原因？中断已经关闭。
void DATAEE_WriteByte(uint8_t bAdd, uint8_t bData)
{
uint8_t GIEBitValue = INTCONbits.GIE;

NVMADRH = 0;
NVMADRL = bAdd; //+ EEP_OFFSET;
NVMDATL = bData;
NVMCON1bits.NVMREGS = 1;
NVMCON1bits.WREN = 1;
INTCONbits.GIE = 0;    // Disable interrupts
NVMCON2 = 0x55;
NVMCON2 = 0xAA;
NVMCON1bits.WR = 1;
NOP();  // NOPs may be required for latency at high frequencies
NOP();
// Wait for write to complete
while (NVMCON1bits.WR)
{
}

NVMCON1bits.WREN = 0;
INTCONbits.GIE = GIEBitValue; // restore interrupt enable
}

uint8_t DATAEE_ReadByte(uint8_t bAdd)
{
NVMADRH = 0;
NVMADRL = bAdd; //+ EEP_OFFSET;
NVMCON1bits.NVMREGS = 1;
NVMCON1bits.RD = 1;
NOP();  // NOPs may be required for latency at high frequencies
NOP();
NOP();  // NOPs may be required for latency at high frequencies
NOP();
return (NVMDATL);
}

只看该作者 · 2021-7-5 16:22

先清除再写，试试。

只看该作者 · 2021-7-5 16:49

你的地址是否加了7000h? 如下数据手册所述：
11.4.3 NVMREG WRITE TO EEPROM
Writing to the EEPROM is accomplished by the
following steps:1.Set the NVMREGS and WREN bits of theNVMCON1 register.
2.Write the desired address (address +7000h) into the NVMADRH:NVMADRL register pair

只看该作者 · 2021-7-5 19:20

对，就是这个偏移地址的问题

只看该作者 · 2021-7-5 21:01

地址操作不对