//太长了，分2段发
void init_adc6()//初始化ADC vp6
{
VP6EN=1;//使能VP6
delay_ms(1);//延时待VP6稳定
ADCON0 = 0xb5;//结果右对齐，基准为VDD，通道选择VP6进行校准
ADCON1 = 0x30;//ADC时钟选择
ADIE = 0;//禁止ADC中断
delay_ms(1);
}
uint get_ad6()//AD转换 vp6
{
init_adc6();
uint adval;//0x000~0x3ff,1024
GODONE = 1;
while(GODONE);
adval = ADRESH;//00000000 00000011
adval = adval << 8 | ADRESL;//00000011 00000000|11111111=00000011 11111111
return (adval);
}
void init_adc()//初始化ADC
{
ADCON0 = 0xa9;//结果右对齐,基准为VDD,通道选择AN10
ADCON1 = 0x30;//ADC时钟选择
ADIE = 0;//禁止ADC中断
delay_ms(1);
}
uint get_ad()//AD转换
{
init_adc();
uint adval;//0x000~0x3ff,1024
GODONE = 1;
while(GODONE);
adval = ADRESH;//00000000 00000011
adval = adval << 8 | ADRESL;//00000011 00000000|11111111=00000011 11111111
return (adval);
}
void init()//系统初始化
{
OSCCON = 0x01;//振荡器控制寄存器配置为内部31KHz
//OSCCON = 0x31;//振荡器控制寄存器配置为内部500KHz
TRISA = 0x34;//00110100RA2/RA4/RA5为悬空脚
//PORTA = 0xcb;//11001011
TRISB = 0x50;//01010000RB4为模拟输入(采样电压)RB6为悬空脚
//PORTB = 0xaf;//10101111
TRISC = 0x07;//00000111RC2为模拟输入(按键中断),RC1/RC0为悬空脚
//PORTC = 0xf8;//11111000
ANSEL = 0x40;//enable AN6(RC2)
ANSELH = 0x04;//enable AN10(RB4)
}
void delay_ms(uint xms)//延时xms
{
uint i,j;
for(i=xms;i>0;i--)//8MHz晶振下，xms等于几就延时几ms
for(j=152;j>0;j--);
}