采用 16 个 ADC 按键模拟模拟量输入，将转换后结果送数码管显示（0～1023）

#include <STC15F2K60S2.H> #include "intrins.h" // 0 1 2 3 4 5 6 7 8 9 black 标准字库 共阴极 u8 code LED_Value[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F, 0x00}; u8 code LED_smduan[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //位码 sbit SER =P4^0; // SER 数据输入 sbit RCLK =P5^4; // RCLk 数据锁存 sbit SRCLK =P4^3; // SRCLK 数据移位 #define LED_Black 0x0a #define Timer0_Reload 1000 //us u8 LED[4]; //显示缓冲 u8 display_index; //显示位索引 u8 t_1ms; u16 ADC_Result=0; u16 ADC_Value[3]; u8 count=0; void LED_Scan(void); void Send_595(u8 dat); void LED_Display(void); void main(void) { u16 i; u8 ADC_Flag ; P0M0 = 0x00;P0M1 = 0x00; P1M0 = 0x00;P1M1 = 0x00; P2M0 = 0x00;P2M1 = 0x00; P3M0 = 0x00;P3M1 = 0x00; P4M0 = 0x00;P4M1 = 0x00; P5M0 = 0x00;P5M1 = 0x00; P1M0|=(1<<4); P1M1|=(1<<4);//P14开漏 TH0 = (65536-Timer0_Reload)/ 256; TL0 = (65536-Timer0_Reload) % 256; ET0 = 1; TR0 = 1; EA = 1; // CLK_DIV&=~(1<<5); P1ASF=(1<<4);//P14做ADC ADC_CONTR=0x80; //ADC上电 for(i=0;i<1000;i++); while(1) { ADC_CONTR=0x88|(0x04);//启动ADC,并选择通道4 _nop_(); _nop_(); _nop_(); _nop_(); ADC_Flag=0; while(ADC_Flag==0) { ADC_Flag=ADC_CONTR&0x10; } ADC_CONTR=0x84; } } void timer0_ISR (void) interrupt 1 { t_1ms++; LED_Display(); LED_Scan(); if(t_1ms==5) { ADC_Value[count++]=(((u16)ADC_RES << 2) | (ADC_RESL & 3)); if(count==3) { ADC_Result=((ADC_Value[0]+ADC_Value[1]+ADC_Value[2])/3); count=0; } t_1ms=0; } } void LED_Scan(void) { if(ADC_Result>= 1000) LED[0] = ADC_Result/1000; else LED[0]=LED_Black; if(ADC_Result>= 100) LED[1] = ADC_Result%1000/100; else LED[1]=LED_Black; if(ADC_Result>= 10) LED[2] = ADC_Result%100/10; else LED[2]=LED_Black; LED[3] =ADC_Result%10; } void Send_595(u8 dat) { u8 i; for(i=0;i<8;i++) { dat<<=1; SER=CY; SRCLK=0; SRCLK=1; } } void LED_Display(void) { Send_595(~LED_smduan[display_index]); //输出位码 Send_595(LED_Value[LED[display_index]]); //输出段码 RCLK=0; RCLK=1; if(++display_index >= 4) display_index =0; }