PIC??????PIC16F884
buck??·
????????????·??SW ???????PWM ?????н?????????????Vout?????????????о???????? ??5V ??? ??????PIC AN1???????AD?????
???????????1602???????????????????????????? ???????PWM??????????????????
?????????1602 ?????? д???? ??д??? ??? PIC??AD??????????飬????????
#include<htc.h>
__CONFIG(0x201A);
#define uint unsigned int
#define uchar unsigned char
#define rs RC4 //????????
#define en RC5 // ????
#define DATA PORTD //?????
//RC1 ???PWM?????
const uchar dis1[]="The voltage is:"; //asm("nop");
const uchar dis2[]=" . V";
void delay(uchar time) //1ms
{
uint j;
for(time;time>0;time--)
for(j=160;j>0;j--);
}
void lcd_wcmd(uchar cmd)
{
rs = 0;
en = 0;
DATA = cmd;//??8λ???????P0?????1602
delay(2);
en = 1;
delay(2);
en = 0;
}
void lcd_wdat(uchar dat)
{
rs = 1;
en = 0;
DATA= dat;//??8λ???????P0?????1602
delay(2);
en = 1;
delay(2);
en = 0;
}
void lcd_init()
{
TRISC=0Xcf; //1100 1111
TRISD=0X00;
lcd_wcmd(0x38); ////16*2?????5*7????8λ????
lcd_wcmd(0x0c); //???????????
lcd_wcmd(0x06); //??????
lcd_wcmd(0x01); //???LCD?????????
}
void pwm_init()
{
TRISC1=1; //CCP2 OUTPUT DISABLE
PR2=0XFF;
CCP2CON=0X3C; //0011(CCPR1L????λ))1100 11XX PWM MODE
CCPR2L=0X3F; //CCPR2L:CCP2CON<5:4>/4(PR2+1)PULSE WIDTH
//0X3F 25%
TMR2IF=0;
T2CON=0X05; //?????????2 ????????1:4
while(TMR2IF)
{
TMR2IF=0;
TRISC1=0;
}
}
void adc_init()
{
ADCON0=0X45;// f/2????? AN1??? AD?????? ???ADC
ADCON1=0X80; //????? ?ο???? VSS VDD
TRISA=0X01; //????
delay(5);
}
void deal_ad()
{
uint temp;
uint ad_sample;
uint result;
uchar a1,a2,a3;
GO_DONE=1;
while(GO_DONE);
ad_sample=ADRESL+(ADRESH<<8);
result=(ad_sample*500)>>10; //?ο????5V ??????100??
temp=result;
a1=temp/100;
a2=temp%100/10;
a3=temp%100%10;
if(a1!=0)
{
lcd_wcmd(0x80+0x44);
lcd_wdat(a1+0x30);
}
lcd_wcmd(0x80+0x45);
lcd_wdat(a2+0x30);
lcd_wcmd(0x80+0x47);
lcd_wdat(a3+0x30);
}
void lcd_dis()
{
uchar i;
lcd_wcmd(0x80);
i=0; //???????λ???????е??5?????
while(dis1[i]!='\0')
{ //??????"welcome!"
lcd_wdat(dis1[i]);
i++;
}
lcd_wcmd(0x80+0X40);
i=0; //???????λ???????е??5?????
while(dis2[i]!='\0')
{ //??????"welcome!"
lcd_wdat(dis2[i]);
i++;
}
}
void main()
{
delay(10);
lcd_init(); //?????LCD ??д???????? ???????
adc_init();
while(1)
{
lcd_dis();
deal_ad();
}
// pwm_init();
while(1);
}
????????????????ο???PWM??????????? ??????????????????
????admin ?????????2019-10-12
