c - PIC24读取ADC错误

Question

我正在尝试让 PIC24 与 ADC 转换器配合使用，使用电位计作为音量旋钮，但为此，我需要读出 ADC，而代码不允许我这样做 build 。请参阅问题底部。接线正确。

MPlab 在 main.c 中没有显示任何错误，但是当我构建项目时，user.c 中出现了一些错误。

我将 PIC24FJ64GB002 连接到板上，并带有一些按钮和 mdog 显示屏。

main.c

#include <p24FJ64GB002.h>
//#include <pic.h>
#include "DogM.h"
#include <stdlib.h>
#include <time.h>
#include <p24fxxxx.h>
//#include <user.c>

_CONFIG1(    JTAGEN_OFF &     //JTAG port is disabled
        GCP_OFF &         //GSP Memory Code Protection OFF
        GWRP_OFF &        //GCC Flash Write Protection OFF
        //COE_OFF &         //
        FWDTEN_OFF &      //Watchdog Timer OFF
        ICS_PGx1)         //debug over PGD1 and PGC1

_CONFIG2(    FNOSC_FRCPLL &   //Internal FRC with PLL
        OSCIOFNC_ON &     //RA3 is clk out (fosc/2)
        POSCMOD_NONE &    //Primary oscillator disabled
        I2C1SEL_PRI)      //Use default SCL1/SDA1 pins

#define VREG33_DIR TRISAbits.TRISA0
#define VREG33_EN LATAbits.LATA0
#define MODE_LED_DIR TRISAbits.TRISA1
#define MODE_LED LATAbits.LATA1


#pragma code

int main(void)
{
 // Set up the hardware of the display
 InitApp();
mdog_Init(0x81, 0x19);
init_adc();

clearDisplay();

// Initscreen clears a internal bitmap used
// in drawScreen to send out to the display
    initScreen();

    // Beware writeString will write directly to the display
// the internal bitmap is not modified.

CLKDIVbits.RCDIV0=0;     //clock divider to 0
AD1PCFG = 0xFFFF;        // Default all pins to digital
OSCCONbits.SOSCEN=0;     //Disables the secondary oscilator

MODE_LED_DIR = 0;        //sets the Mode LED pin RA1 as output
MODE_LED = 0;            //turns LED off
VREG33_DIR =0;           //sets teh VREG pin RA0 as output
VREG33_EN = 1;           //turns on the voltage regulator

unsigned long int i,voltage;
//////////////////////////////////////////////////////////////
///////////////ADC config//////////////////////////////////
AD1PCFGbits.PCFG12=0;          //configure RB12 as analog
AD1CON1bits.SSRC  = 0b111;     // SSRC<3:0> = 111 implies internal
                               // counter ends sampling and starts
                               // converting.
AD1CON3 = 0x1F02;              // Sample time = 31Tad,
                               // Tad = 2 Tcy
AD1CHS =12;                    //ADC channel select 12
AD1CON1bits.ADON =1;           // turn ADC on
///FOREVER LOOP///////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////
while(1)
{
    //this just gives us a little delay between measurements
    i =0xFFFFF;                 //sets i to 1048575
    while (i--);                //delay function

    //start a measurement with the ADC
    AD1CON1bits.DONE=0;         //resets DONE bit
    AD1CON1bits.SAMP=1;         //start sample

    while(AD1CON1bits.DONE==0); //wait for conversion to finish

    //get the measurement and use it to control the LED
    voltage = ADC1BUF0;         //get the voltage measurement
    //if (voltage > 0x1D1) MODE_LED = 1; //enable LED if measurement is > 3volts
    //else MODE_LED = 0;           //disable LED if less than 3volts
        writeString(boldFont, 0x0, 0x3, "Hallo");

   }
}

用户.c

  /******************************************************************************/
/* Files to Include                                                           */
/******************************************************************************/

/* Device header file */
#if defined(__PIC24E__)
#include <p24Exxxx.h>
#elif defined (__PIC24F__)
//#include <p24Fxxxx.h>
#include <p24FJ64GB002.h>
#elif defined(__PIC24H__)
#include <p24Hxxxx.h>
#endif

//#include "user.h"            /* variables/params used by user.c */

/******************************************************************************/
/* User Functions                                                             */
/******************************************************************************/

/* <Initialize variables in user.h and insert code for user algorithms.> */

/* TODO Initialize User Ports/Peripherals/Project here */
/**
     * Initialize the Analog to Digital Converter.
 */
/**/void init_adc(void)
{
TRISAbits.TRISA1    = 0b1;  // set pin as input
ANCON0bits.ANSEL1   = 0b1;  // set pin as analog
ADCON1bits.VCFG     = 0b00; // set v+ reference to Vdd
ADCON1bits.VNCFG    = 0b0;  // set v- reference to GND
ADCON1bits.CHSN     = 0b000;// set negative input to GND
ADCON2bits.ADFM     = 0b1;  // right justify the output
ADCON2bits.ACQT     = 0b110;// 16 TAD
ADCON2bits.ADCS     = 0b101;// use Fosc/16 for clock source
ADCON0bits.ADON     = 0b1;  // turn on the ADC
}
/**
 * Preform an analog to digital conversion.
 * @param channel The ADC input channel to use.
 * @return The value of the conversion.
 */
/* uint16_t adc_convert(uint8_t channel)
{
ADCON0bits.CHS      = channel;  // select the given channel
ADCON0bits.GO       = 0b1;      // start the conversion
while(ADCON0bits.DONE);         // wait for the conversion to finish
return (ADRESH<<8)|ADRESL;      // return the result
} */
void InitApp(void) {
// Setup analog functionality and port direction
AD1PCFGL = 0xFFFF; // Make analog pins digital

// Initialize peripherals
// set up I/O ports
TRISB = 0x0000; // all pins as output
LATB = 0x0; // all set to 0

// CN interrupts
CNEN1 = 0; /* Disable all CN */
CNEN2 = 0;
init_adc();
CNEN1bits.CN2IE = 1;
CNEN1bits.CN3IE = 1;
CNEN2bits.CN29IE = 1;
CNEN2bits.CN30IE = 1;

IPC4bits.CNIP0 = 1;
IPC4bits.CNIP1 = 0;
IPC4bits.CNIP2 = 0;

IFS1bits.CNIF = 0;
IEC1bits.CNIE = 1;
}

构建时记录:

"D:\Program Files (x86)\Microchip\xc16\v1.23\bin\xc16-gcc.exe"   user.c  -o build/default/production/user.o  -c -mcpu=24FJ64GB002  -MMD -MF "build/default/production/user.o.d"        -g -omf=elf -O0 -I"Dogm128x64" -msmart-io=1 -msfr-warn=off
user.c: In function 'init_adc':
user.c:30:5: error: 'ANCON0bits' undeclared (first use in this function)
user.c:30:5: note: each undeclared identifier is reported only once for each function it appears in
user.c:31:5: error: 'ADCON1bits' undeclared (first use in this function)
user.c:34:5: error: 'ADCON2bits' undeclared (first use in this function)
user.c:37:5: error: 'ADCON0bits' undeclared (first use in this function)
make[2]: *** [build/default/production/user.o] Error 255
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2
make[2]: Leaving directory `D:/Dropbox/HvA/Embedded/Potmeter'
make[1]: Leaving directory `D:/Dropbox/HvA/Embedded/Potmeter'

BUILD FAILED (exit value 2, total time: 254ms)

Answer 1

我认为@ElderBug是对的。你把所有的名字都混在一起。该错误告诉您该名称不存在。然后检查是否有其他名称，例如 AD1CON0bits。
Microchip 为每个外设提供了手册引用。它比普通数据表提供更多提示。
对于您的 MCU，您可以在这里找到它:http://ww1.microchip.com/downloads/en/DeviceDoc/39705b.pdf