pic12f1840的读取针脚

问题描述

我正在使用宽度为pickit3和mplab x ide(以及x8 c编译器)的 pic12f1840 。这可能真的很容易,但是我不知道如何读取引脚的值!

void main(void) {

    //setting up TESA
    TRISA = 0b111111;
    TRISA5 = 0; //pin 5 is output
    TRISA1 = 1; //pin 1 in input

    for (;;) {
        RA5 = RA1;
    }
}

这是我目前的代码(我省略了配置并包含了)。我有一个连接到引脚5的LED灯,还有一个连接到引脚1的按钮(带有下拉电阻)。整个设备的电压为3.3伏。

解决方法

在处理像PIC这样的Microchip控制器时,发布完整的代码是一个不错的主意。根据我的经验,真正的问题几乎总是在原始海报遗漏的地方。

此代码在模拟器中对我有效:

    /*
     * File:   main.c
     * Author: dan1138
     * Compiler: XC8 v2.20
     * IDE: MPLABX v5.40
     *
     * Created on September 29,2020,1:24 PM
     */

    // PIC12F1840 Configuration Bit Settings

    // 'C' source line config statements

    // CONFIG1
    #pragma config FOSC = INTOSC    // Oscillator Selection (INTOSC oscillator: I/O function on CLKIN pin)
    #pragma config WDTE = OFF       // Watchdog Timer Enable (WDT disabled)
    #pragma config PWRTE = OFF      // Power-up Timer Enable (PWRT disabled)
    #pragma config MCLRE = ON       // MCLR Pin Function Select (MCLR/VPP pin function is MCLR)
    #pragma config CP = OFF         // Flash Program Memory Code Protection (Program memory code protection is disabled)
    #pragma config CPD = OFF        // Data Memory Code Protection (Data memory code protection is disabled)
    #pragma config BOREN = OFF      // Brown-out Reset Enable (Brown-out Reset disabled)
    #pragma config CLKOUTEN = OFF   // Clock Out Enable (CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin)
    #pragma config IESO = ON        // Internal/External Switchover (Internal/External Switchover mode is enabled)
    #pragma config FCMEN = ON       // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is enabled)

    // CONFIG2
    #pragma config WRT = OFF        // Flash Memory Self-Write Protection (Write protection off)
    #pragma config PLLEN = ON       // PLL Enable (4x PLL enabled)
    #pragma config STVREN = ON      // Stack Overflow/Underflow Reset Enable (Stack Overflow or Underflow will cause a Reset)
    #pragma config BORV = LO        // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor),low trip point selected.)
    #pragma config LVP = ON         // Low-Voltage Programming Enable (Low-voltage programming enabled)

    // #pragma config statements should precede project file includes.
    // Use project enums instead of #define for ON and OFF.

    #include <xc.h>

    void main(void) {
        //setting up TESA
        TRISA = 0b111111;
        ANSELA = 0; /* make all of PORTA digital I/O */
        TRISAbits.TRISA5 = 0; //pin 5 is output /* use Microchip suggested syntax */
        TRISAbits.TRISA1 = 1; //pin 1 in input  /* use Microchip suggested syntax */

        for (;;) {
            LATAbits.LATA5 = PORTAbits.RA1;  /* use Microchip suggested syntax */
        }
    }

在您的情况下,似乎有两件事:

  1. 不知道您需要为数字操作配置GPIO引脚。
  2. 简单的语法错误。

我的示例代码使用了大约10年以来几乎所有版本的XC8编译器通常都支持的语法。

您使用的较短格式可能并不总是适用于您可以定位的每个控制器。