PIC18F452 AD采样

只看该作者 · 2025-2-23 11:01

代码

/*
* File: MAIN.c
* Author: Administrator
*
* Created on May 24, 2024, 10:32 AM
*/
#include <xc.h>

//?????
//CONFIG1L
#pragma config OSC = XT       // VREG Sleep Enable bit (Ultra low-power regulator is Disabled (Controlled by REGSLP bit)),?????????
#pragma config OSCS = OFF    // LF-INTOSC Low-power Enable bit (LF-INTOSC in High-power mode during Sleep),???? LF-INTOSC ???????
#pragma config PWRT = OFF       // SOSC Power Selection and mode Configuration bits (Digital (SCLKI) mode),SOSC ??????????,?? ? SCLKI?????? RC0 ? RC1 ? I/O ????
#pragma config BOR = ON          // Extended Instruction Set (Disabled)???????????????????????? ??????

// CONFIG1H
//#pragma config BORV = 20          // Oscillator (HS oscillator (Medium power, 4 MHz - 16 MHz))?HS????????
#pragma config WDT = OFF          // PLL x4 Enable bit (Enabled),??PLL???????4?????32MHz
#pragma config WDTPS = 128          // Fail-Safe Clock Monitor (Disabled)????????????
#pragma config CCP2MUX = ON          // Internal External Oscillator Switch Over Mode (Disabled)???????

// CONFIG2L
#pragma config STVR = ON       // Power Up Timer (Disabled)??????????
#pragma config LVP = ON    // Brown Out Detect (Enabled in hardware, SBOREN disabled)????????????
#pragma config BORV = 3          // Brown-out Reset Voltage bits (1.8V)??????????1.8v
#pragma config CP0 = OFF    // BORMV Power level (ZPBORMV instead of BORMV is selected)???ZPBORMV???BORMV

// CONFIG2H
#pragma config CP1 = OFF    // Watchdog Timer (WDT disabled in hardware; SWDTEN bit disabled),???????
//#pragma config WDTEN = SWDTDIS    // Watchdog Timer (WDT enabled in hardware; SWDTEN bit disabled),?????WDT???SWDTEN?
#pragma config CP2 = OFF       // Watchdog Postscaler (1:256)???????1:256?????1.024s

// CONFIG3H
#pragma config CP3 = OFF // ECAN Mux bit (ECAN TX and RX pins are located on RB2 and RB3, respectively)?1 = CANTX ? CANRX ?????? RB2 ? RB3 ?
#pragma config CPB = OFF // MSSP address masking (7 Bit address masking mode)?1 = ?? 7 ???????
#pragma config CPD = OFF    // Master Clear Enable (MCLR Enabled, RE3 Disabled)???MCLR????

// CONFIG4L

// CONFIG6L
#pragma config WRT0 = OFF    // Table Write Protect 00800-01FFF (Disabled)?????
#pragma config WRT1 = OFF    // Table Write Protect 02000-03FFF (Disabled)?????
#pragma config WRT2 = OFF    // Table Write Protect 04000-05FFF (Disabled)?????
#pragma config WRT3 = OFF    // Table Write Protect 06000-07FFF (Disabled)?????

// CONFIG6H
#pragma config WRTC = OFF    // Config. Write Protect (Disabled)???????????
#pragma config WRTB = OFF    // Table Write Protect Boot (Disabled)?????????
#pragma config WRTD = OFF    // Data EE Write Protect (Disabled)???EEPROM?????

// CONFIG7L
#pragma config EBTR0 = OFF    // Table Read Protect 00800-01FFF (Disabled)??????
#pragma config EBTR1 = OFF    // Table Read Protect 02000-03FFF (Disabled)??????
#pragma config EBTR2 = OFF    // Table Read Protect 04000-05FFF (Disabled)??????
#pragma config EBTR3 = OFF    // Table Read Protect 06000-07FFF (Disabled)??????

// CONFIG7H
#pragma config EBTRB = OFF    // Table Read Protect Boot (Disabled)?????????

//void TMR1_ISR(void);
//void delay(void);
unsigned char j,flag;
unsigned char n;
//#pragma interrupt chk_isr
unsigned long i;
//#pragma code My_Hiprio_Int=0x08

//#pragma code
int main(int argc, char** argv) {
PORTD=0;
TRISD=0;
TRISAbits.RA0=1;
ADCON0=0X81;
ADCON1=0X0E;
INTCONbits.TMR0IF=0;
T0CON=0XC7;

while(1)
{

      while(INTCONbits.TMR0IF==0);
      INTCONbits.TMR0IF=0;
      ADCON0bits.GO=1;
      while(ADCON0bits.DONE==1);
      PORTD=ADRESH;

}
return (0);
}

运行效果图

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版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。

原文链接：https://blog.csdn.net/chenbingjy/article/details/139248599

1万 · 2025-2-23 11:18

复制

#include <pic18f452.h>

#include <stdio.h>



// 配置位设置

#pragma config OSC = HS         // 使用外部高速晶振

#pragma config WDT = OFF        // 关闭看门狗定时器

#pragma config LVP = OFF        // 关闭低电压编程



// 定义AD转换结果变量

unsigned int adc_result = 0;



// 初始化AD模块

void ADC_Init() {

    ADCON1 = 0x0E;  // 配置AN0为模拟输入，其他引脚为数字I/O

    ADCON2 = 0x92;  // 右对齐结果，TAD = 12 TOSC，ACQT = 12 TAD

    ADCON0 = 0x01;  // 使能AD模块，选择AN0通道

}



// 读取AD转换结果

unsigned int ADC_Read() {

    ADCON0bits.GO = 1;  // 启动AD转换

    while (ADCON0bits.GO);  // 等待转换完成

    return ((unsigned int)ADRESH << 8) | ADRESL;  // 返回10位AD结果

}



// 主程序

void main() {

    // 初始化

    TRISA = 0xFF;  // 设置PORTA为输入

    TRISB = 0x00;  // 设置PORTB为输出

    ADC_Init();    // 初始化AD模块



    while (1) {

        adc_result = ADC_Read();  // 读取AD转换结果

        PORTB = adc_result >> 2;  // 将AD结果的高8位输出到PORTB（10位结果右移2位）

        __delay_ms(100);          // 延时100ms

    }

}

1万 · 2025-2-23 11:19

ADCON1配置：

ADCON1 = 0x0E;：将AN0配置为模拟输入，其他引脚配置为数字I/O。

参考电压选择VDD和VSS。

ADCON2配置：

ADCON2 = 0x92;：

右对齐AD转换结果。

TAD（AD时钟周期）设置为12 TOSC。

ACQT（采样时间）设置为12 TAD。

ADCON0配置：

ADCON0 = 0x01;：使能AD模块，并选择AN0通道。

ADC_Read函数：

启动AD转换并等待转换完成。

返回10位的AD转换结果。

主程序：

初始化PORTA和PORTB。

循环读取AD转换结果，并将结果的高8位输出到PORTB。

1万 · 2025-2-23 13:18

寄存器掌握好了，写代码还是挺好看的。

PIC18F452 AD采样

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