PIC16F1824内部晶振误差10%

2万 · 2021-4-1 21:43

有没遇到PIC16F1824内部晶振偏差10%的问题，我配置内部晶振为2M，同时引出CLKOUT引脚，测出它的频率是550K，理论上应该是要2M/4也就是500K，误差10%这也太大了吧

2万 · 2021-4-1 21:46

另外有没有遇见eeprom写入数据并回读校验正常，掉电重启一下数据丢失，全是0xFF的情况？

1万 · 2021-4-1 21:48

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

2万 · 2021-4-1 21:49

static void eepromWriteByte(unsigned char addr,unsigned char val){

unsigned char gie;
EEADRL = (unsigned char)(addr & 0xFF);
EEDATL = (unsigned char)(val);
EECON1bits.EEPGD = 0;
EECON1bits.CFGS = 0;
EECON1bits.WREN = 1;

gie = INTCONbits.GIE;
INTCONbits.GIE = 0;
EECON2 = 0x55;
EECON2 = 0xAA;
EECON1bits.WR = 1;
while(EECON1bits.WR);
EECON1bits.WREN = 0;
INTCONbits.GIE = gie;
return;
}

static unsigned char eepromReadByte(unsigned char addr){

EEADRL = addr;
EECON1bits.CFGS = 0;
EECON1bits.EEPGD = 0;
EECON1bits.RD = 1;
asm("nop");
asm("nop");
return (EEDATL);
}