[问答]

PIC18F13K22 A/D：在AN7上读一个LM35DZ但是结果总是0

1910 PIC18

问答对人有帮助，内容完整，我也想知道答案 0 你好，我想在AN7上读一个LM35DZ，但是结果总是0。有人能帮我吗？感谢这是我的密码：以上来自于百度翻译以下为原文 Hello, I'm trying to read a LM35DZ at the AN7, but the result is always 0. Can anyone help me? Thanks This is my code: /* * File: main.c * Author: NOT-PDI * * Created on 8 de Junho de 2017, 11:37 / #include #include #include #include "usart.h" // PIC18F13K22 Configuration Bit Settings // 'C' source line config statements #include //definindo frequência do cristal #define _XTAL_FREQ 32000000 // #pragma config statements should precede project file includes. // Use project enums instead of #define for ON and OFF. // CONFIG1H #pragma config FOSC = HS // Oscillator Selection bits (HS oscillator) #pragma config PLLEN = ON // 4 X PLL Enable bit (Oscillator multiplied by 4) #pragma config PCLKEN = ON // Primary Clock Enable bit (Primary clock enabled) #pragma config FCMEN = OFF // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor disabled) #pragma config IESO = OFF // Internal/External Oscillator Switchover bit (Oscillator Switchover mode disabled) // CONFIG2L #pragma config PWRTEN = ON // Power-up Timer Enable bit (PWRT disabled) #pragma config BOREN = SBORDIS // Brown-out Reset Enable bits (Brown-out Reset enabled in hardware only (SBOREN is disabled)) #pragma config BORV = 22 // Brown Out Reset Voltage bits (VBOR set to 1.9 V nominal) // CONFIG2H #pragma config WDTEN = ON // Watchdog Timer Enable bit (WDT is always enabled. SWDTEN bit has no effect.) #pragma config WDTPS = 32768 // Watchdog Timer Postscale Select bits (1:32768) // CONFIG3H #pragma config HFOFST = OFF // HFINTOSC Fast Start-up bit (HFINTOSC starts clocking the CPU without waiting for the oscillator to stablize.) #pragma config MCLRE = ON // MCLR Pin Enable bit (MCLR pin enabled, RA3 input pin disabled) // CONFIG4L #pragma config STVREN = ON // Stack Full/Underflow Reset Enable bit (Stack full/underflow will cause Reset) #pragma config LVP = OFF // Single-Supply ICSP Enable bit (Single-Supply ICSP enabled) #pragma config BBSIZ = OFF // Boot Block Size Select bit (512W boot block size) #pragma config XINST = OFF // Extended Instruction Set Enable bit (Instruction set extension and Indexed Addressing mode disabled (Legacy mode)) // CONFIG5L #pragma config CP0 = OFF // Code Protection bit (Block 0 not code-protected) #pragma config CP1 = OFF // Code Protection bit (Block 1 not code-protected) // CONFIG5H #pragma config CPB = OFF // Boot Block Code Protection bit (Boot block not code-protected) #pragma config CPD = OFF // Data EEPROM Code Protection bit (Data EEPROM not code-protected) // CONFIG6L #pragma config WRT0 = OFF // Write Protection bit (Block 0 not write-protected) #pragma config WRT1 = OFF // Write Protection bit (Block 1 not write-protected) // CONFIG6H #pragma config WRTC = OFF // Configuration Register Write Protection bit (Configuration registers not write-protected) #pragma config WRTB = OFF // Boot Block Write Protection bit (Boot block not write-protected) #pragma config WRTD = OFF // Data EEPROM Write Protection bit (Data EEPROM not write-protected) // CONFIG7L #pragma config EBTR0 = OFF // Table Read Protection bit (Block 0 not protected from table reads executed in other blocks) #pragma config EBTR1 = OFF // Table Read Protection bit (Block 1 not protected from table reads executed in other blocks) // CONFIG7H #pragma config EBTRB = OFF // Boot Block Table Read Protection bit (Boot block not protected from table reads executed in other blocks) //prototipos de funções void TMR0Isr(); void leituraTemperatura(); void leituraNivel(); void verificaTanque(); void inicializa_RS232(long velocidade, int modo); //variáveis globais char flagTMR0; bit idTemp; int cont1s, nivel, cont200ms, tanque, contTemp; unsigned int vTemp[20], auxTemp, temp1, temp2, temp3; void interrupt vInt(){ if (INTCONbits.TMR0IF) TMR0Isr(); } / * / int main(int argc, char* argv) { // Configura RS232 // 9 bits // Processador 8 MHz x 4 (PLL) = 32 MHz // 19200 bps inicializa_RS232(9600,1); //configura o timer em 50ms TMR0H = 0x3C; TMR0L = 0xB0; T0CON = 0b10000010; //interrupções INTCON = 0b11100000; INTCON2 = 0b10000000; INTCON3 = 0b00000000; // PIE1 = 0b00000000; // PIE2 = 0b00000000; // PIR1 = 0b00000000; // PIR2 = 0b00000000; //oscilador // OSCCON = 0b01100010; // OSCCON2 = 0b00000000; // // OSCTUNE = 0b00000000; //configuração de portas de entrada e saida TRISC = 0b00001111; LATC = 0b00000000; TRISB = 0b01110000; LATB = 0b00000000; WPUB = 0b01110000; //resistores de pull-UP TRISA = 0b00000100; LATA = 0b00000000; WPUA = 0b00000000; //conversor A/D ADCON0 = 0b00000000; ADCON1 = 0b00000000; ADCON2 = 0b10100100; ANSEL = 0b10000000; ANSELH = 0b00000000; CCP1CON = 0b00000000; // CM1CON0 = 0b000000000; // CM2CON0 = 0b000000000; // // SRCON0 = 0b00000000; // SRCON1 = 0b00000000; // // VREFCON0 = 0b00000000; //inicialização de variáveis flagTMR0 = 0; cont1s = 20; cont200ms = 4; nivel = 0; LATCbits.LATC4 = 0 ; while (1){ CLRWDT(); if (flagTMR0){ if (cont200ms) cont200ms--; if (cont1s) cont1s--; // LATCbits.LATC4 = !LATCbits.LATC4; flagTMR0 = 0; leituraTemperatura(); } CLRWDT(); if (!cont1s){ if (idTemp){ auxTemp = auxTemp / 20; cont1s = 20; if (auxTemp > 10000) auxTemp = 0; temp1 = 0x6; temp2 = auxTemp >> 8; temp3 = auxTemp & 0xFF; while(!TXSTAbits.TRMT); TXREG = temp1; while(!TXSTAbits.TRMT); TXREG = temp2; while(!TXSTAbits.TRMT); TXREG = temp3; auxTemp = 0; idTemp = 0; } LATCbits.LATC4 = !LATCbits.LATC4; } CLRWDT(); if (!cont200ms){ cont200ms = 4; } } return (EXIT_SUCCESS); } void TMR0Isr(){ TMR0H = 0x3C; TMR0L = 0xB0; flagTMR0 = 1; // LATCbits.LATC4 = !LATCbits.LATC4; INTCONbits.TMR0IF = 0; } void inicializa_RS232(long velocidade, int modo) {////por padrão é usado o modo 8 bits e sem paridade, mas se necessario ajuste aqui a configuração desejada. //verifique datasheet para ver a porcentagem de erro e se a velocidade é possivel para o cristal utilizado. RCSTA = 0X90; //habilita porta serial,recepção de 8 bit em modo continuo,assincrono. int valor; if (modo == 1) {//modo = 1 ,modo alta velocidade TXSTA = 0X24; //modo assincrono,trasmissao 8 bits. valor = (int) ((((_XTAL_FREQ4) / velocidade) - 16) / 16); //calculo do valor do gerador de baud rate } else {//modo = 0 ,modo baixa velocidade TXSTA = 0X20; //modo assincrono,trasmissao 8 bits. valor = (int) ((((_XTAL_FREQ4) / velocidade) - 64) / 64); //calculo do valor do gerador de baud rate } SPBRG = 0x40; SPBRGH = 3; RCIE = 0; //habilita interrupção de recepção TXIE = 0; BAUDCON = 0x18; } void verificaTanque(){ CLRWDT(); if (!PORTBbits.RB4) tanque = 220; else if (!PORTBbits.RB5) tanque = 120; else if (!PORTBbits.RB6) tanque = 65; else tanque = 25; CLRWDT(); } void leituraTemperatura(){ unsigned long tempH, tempL, temperatura; tempH = 0; tempL = 0; temperatura = 0; ADCON0 = 0b00011101; PIR1bits.ADIF = 0; ADCON0bits.GO = 1; while (!PIR1bits.ADIF); tempH = ADRESH; tempH = tempH << 8; tempL = ADRESL; temperatura = tempH + tempL; temperatura = temperatura * 5000; temperatura = temperatura / 4096; vTemp[contTemp] = temperatura; auxTemp += vTemp[contTemp]; contTemp++; if (contTemp == 20){ idTemp = 1; contTemp = 0; } } void leituraNivel(){ int auxNivel, nivelH, nivelL; //LATCbits.LATC4 = 1; //lendo o primeiro nível auxNivel = nivelH = nivelL = 0; ADCON0 = 0b00001001; PIR1bits.ADIF = 0; ADCON0bits.GO = 1; while (!PIR1bits.ADIF); nivelH = ADRESH; nivelH = nivelH << 8; nivelL = ADRESL; auxNivel = nivelH + nivelL; if (auxNivel > 600) nivel = 1; //lendo o segundo nível auxNivel = nivelH = nivelL = 0; ADCON0 = 0b00010001; PIR1bits.ADIF = 0; ADCON0bits.GO = 1; while (!PIR1bits.ADIF); nivelH = ADRESH; nivelH = nivelH << 8; nivelL = ADRESL; auxNivel = nivelH + nivelL; if (auxNivel > 500) nivel = 2; //lendo o terceiro nível auxNivel = nivelH = nivelL = 0; ADCON0 = 0b00010101; PIR1bits.ADIF = 0; ADCON0bits.GO = 1; while (!PIR1bits.ADIF); nivelH = ADRESH; nivelH = nivelH << 8; nivelL = ADRESL; auxNivel = nivelH + nivelL; if (auxNivel > 400) nivel = 3; //lendo o quarto nível auxNivel = nivelH = nivelL = 0; ADCON0 = 0b00011001; PIR1bits.ADIF = 0; ADCON0bits.GO = 1; while (!PIR1bits.ADIF); nivelH = ADRESH; nivelH = nivelH << 8; nivelL = ADRESL; auxNivel = nivelH + nivelL; if (auxNivel > 350) nivel = 4; // LATCbits.LATC4 = 0; } 0
2019-2-26 13:30:10　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × qun333 该类别下有 57 个回答。邀请回答 caoguiqun 该类别下有 56 个回答。邀请回答技术发广告该类别下有 56 个回答。邀请回答 psw30 该类别下有 44 个回答。邀请回答伊丹姿子该类别下有 41 个回答。邀请回答 uwufwjrw 该类别下有 39 个回答。邀请回答 hetao1111 该类别下有 38 个回答。邀请回答 lc123617 该类别下有 35 个回答。邀请回答欧阳大大该类别下有 32 个回答。邀请回答作死不止该类别下有 31 个回答。邀请回答 asd010 该类别下有 31 个回答。邀请回答 60user92 该类别下有 29 个回答。邀请回答 wy8719 该类别下有 29 个回答。邀请回答嘻嘻爱哈哈该类别下有 28 个回答。邀请回答 haikitty 该类别下有 28 个回答。邀请回答 ju978779 该类别下有 28 个回答。邀请回答 xiuzhen122 该类别下有 27 个回答。邀请回答 pol666 该类别下有 27 个回答。邀请回答 ueywyrsdfs 该类别下有 26 个回答。邀请回答 lhly23 该类别下有 25 个回答。邀请回答举报鲁玉萍相关推荐 • ds18b20与lm35dz比较 6467 • 如何在PIC18中使用EUSART 2617 • PIC18F13K22的AD无法获取结果 1348 • ADC引脚如何测量电压？ 132 • PIC18F65K40 PORTF上的ADC通道读取问题 3087 • PIC18F87K22 A2D返回负值 1460 • 带ICD3的PIC18F4520无法对器件进行编程 1774 • 有帮代编程的吗？MPLAB环境下的 3664 • 谁能澄清在PIC18F14K22上有多少插销中断 1153 • LM35与PIC18F4550的接口无法得到正确的值该怎么办？ 2001 1个回答

答案对人有帮助，有参考价值 0 我试试这个。谢谢。以上来自于百度翻译以下为原文 I'll try this. Thanks.

2019-2-26 13:59:25 评论举报刘颖