PIC 1508 EEPROM PIC

EEPROM读、擦、写。

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unsigned int eeprom_read(unsigned int address) { //GIE=0; unsigned int data = https://www.it610.com/article/0; PMCON1bits.CFGS = 0; //访问闪存程序存储器 PMADRH = address / 256; PMADRL = address % 256; //写入地址 PMCON1bits.RD = 1; //启动读操作 _nop(); _nop(); data = PMDATH; data = data << 8; data+ = PMDATL; //GIE = 1; return data; }

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void eeprom_erase(unsigned int address) { //GIE=0; PMCON1bits.CFGS = 0; //访问闪存程序存储器 PMADRH = address / 256; PMADRL = address % 256; //擦除地址 PMCON1bits.FREE = 1; //选择擦除操作 PMCON1bits.WREN = 1; //写使能 PMCON2 = 0x55; PMCON2 = 0xAA; //解码 PMCON1bits.WR = 1; //开始擦除 _nop(); _nop(); while(PMCON1bits.WR); //等待擦除完成，硬件自动清零 PMCON1bits.WREN = 0; //GIE = 1; }

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void eeprom_write(unsigned int address,unsigned int data) { //GIE = 0; PMCON1bits.CFGS = 0; //访问闪存程序存储器 PMADRH = address / 256; PMADRL = address % 256; //写入地址 PMCON1bits.FREE = 0; //选择写操作 PMCON1bits.LWLO = 1; //仅装入写锁存器 PMCON1bits.WREN = 1; //使能写操作 PMDATH = data / 256; PMDATL = data % 256; //装入数据0X308 PMCON1bits.LWLO = 0; //将锁存器内容写入闪存 PMCON2 = 0x55; PMCON2 = 0xAA; //解码 PMCON1bits.WR = 1; _nop(); _nop(); while(PMCON1bits.WR); //等待擦除完成，硬件自动清零 PMCON1bits.WREN = 0; //GIE = 1; }

【PIC 1508 EEPROM】