venkates2218
Full Member level 6
Code:
#include <xc.h>
#define _XTAL_FREQ 8000000
#include "lcd.h"
// CONFIG1H
#pragma config OSC = HS // Oscillator Selection bits (HS oscillator)
#pragma config FCMEN = OFF // Fail-Safe Clock Monitor Enable bit (Fail-Safe Clock Monitor disabled)
#pragma config IESO = OFF // Internal/External Oscillator Switchover bit (Oscillator Switchover mode disabled)
// CONFIG2L
#pragma config PWRT = OFF // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOREN = OFF // Brown-out Reset Enable bits (Brown-out Reset disabled in hardware and software)
#pragma config BORV = 3 // Brown Out Reset Voltage bits (Minimum setting)
// CONFIG2H
#pragma config WDT = OFF // Watchdog Timer Enable bit (WDT disabled (control is placed on the SWDTEN bit))
#pragma config WDTPS = 32768 // Watchdog Timer Postscale Select bits (1:32768)
// CONFIG3H
#pragma config CCP2MX = PORTC // CCP2 MUX bit (CCP2 input/output is multiplexed with RC1)
#pragma config PBADEN = OFF // PORTB A/D Enable bit (PORTB<4:0> pins are configured as digital I/O on Reset)
#pragma config LPT1OSC = OFF // Low-Power Timer1 Oscillator Enable bit (Timer1 configured for higher power operation)
#pragma config MCLRE = ON // MCLR Pin Enable bit (MCLR pin enabled; RE3 input pin disabled)
// CONFIG4L
#pragma config STVREN = OFF // Stack Full/Underflow Reset Enable bit (Stack full/underflow will not cause Reset)
#pragma config LVP = OFF // Single-Supply ICSP Enable bit (Single-Supply ICSP disabled)
#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 (000800-001FFFh) not code-protected)
#pragma config CP1 = OFF // Code Protection bit (Block 1 (002000-003FFFh) not code-protected)
#pragma config CP2 = OFF // Code Protection bit (Block 2 (004000-005FFFh) not code-protected)
#pragma config CP3 = OFF // Code Protection bit (Block 3 (006000-007FFFh) not code-protected)
// CONFIG5H
#pragma config CPB = OFF // Boot Block Code Protection bit (Boot block (000000-0007FFh) 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 (000800-001FFFh) not write-protected)
#pragma config WRT1 = OFF // Write Protection bit (Block 1 (002000-003FFFh) not write-protected)
#pragma config WRT2 = OFF // Write Protection bit (Block 2 (004000-005FFFh) not write-protected)
#pragma config WRT3 = OFF // Write Protection bit (Block 3 (006000-007FFFh) not write-protected)
// CONFIG6H
#pragma config WRTC = OFF // Configuration Register Write Protection bit (Configuration registers (300000-3000FFh) not write-protected)
#pragma config WRTB = OFF // Boot Block Write Protection bit (Boot block (000000-0007FFh) 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 (000800-001FFFh) not protected from table reads executed in other blocks)
#pragma config EBTR1 = OFF // Table Read Protection bit (Block 1 (002000-003FFFh) not protected from table reads executed in other blocks)
#pragma config EBTR2 = OFF // Table Read Protection bit (Block 2 (004000-005FFFh) not protected from table reads executed in other blocks)
#pragma config EBTR3 = OFF // Table Read Protection bit (Block 3 (006000-007FFFh) not protected from table reads executed in other blocks)
// CONFIG7H
#pragma config EBTRB = OFF /* Boot Block Table Read Protection bit (Boot block (000000-0007FFh) not protected from table reads executed in other blocks)*/
void adc_convert(void);
void fn_display(void);
void sensor_ip(void);
unsigned int input_2;
int enable_sensor_1, enable_sensor_2, enable_sensor_3;
#define S0 LATD2
#define S1 LATD3
#define S2 LATC5
#define EN LATC1
void System_init(void) {
TRISA = 0b00000011;
LATA = 0b00000011;
CMCON = 0X07;
TRISB = 0b00000000;
LATB = 0b00000000;
TRISC = 0b10000100;
LATC = 0b10000100;
TRISD = 0b10000011;
LATD = 0b10000011;
TRISE = 0b00000000;
LATE = 0b00000000;
ADCON0 = 0b00000100; //clear ADCON0 to select channel 1 (AN1)
ADCON1 = 0b00001101; //VSS,VDD ref. AN1 analog only
ADCON2 = 0b10010010;
}
void main(void) {
System_init();
lcd_init();
lcd_clear();
lcd_goto(1, 1);
lcd_puts("ADC Test"); //Initial sign
EN = 0;
__delay_ms(30);
while (1) {
enable_sensor_1 = 1;
enable_sensor_2 = 0;
enable_sensor_3 = 0;
sensor_ip();
__delay_ms(100);
__delay_ms(100);
enable_sensor_1 = 0;
enable_sensor_2 = 1;
enable_sensor_3 = 0;
sensor_ip();
__delay_ms(100);
__delay_ms(100);
enable_sensor_1 = 0;
enable_sensor_2 = 0;
enable_sensor_3 = 1;
sensor_ip();
__delay_ms(100);
__delay_ms(100);
}
}
void sensor_ip(void) {
if (enable_sensor_1 == 1) {
/*SENSOR 1*/
lcd_goto(3, 1);
lcd_puts("Sensor 1");
S0 = 1;
S1 = 0;
S2 = 1;
__delay_ms(50);
adc_convert();
__delay_ms(100);
__delay_ms(100);
__delay_ms(100);
__delay_ms(100);
}
if (enable_sensor_2 == 1) {
/*SENSOR 2*/
lcd_goto(3, 1);
lcd_puts("Sensor 2");
S0 = 1;
S1 = 1;
S2 = 1;
__delay_ms(50);
adc_convert();
__delay_ms(100);
__delay_ms(100);
__delay_ms(100);
__delay_ms(100);
}
if (enable_sensor_3 == 1) {
/*SENSOR 3*/
lcd_goto(3, 1);
lcd_puts("Sensor 3");
S0 = 0;
S1 = 1;
S2 = 1;
__delay_ms(50);
adc_convert();
__delay_ms(100);
__delay_ms(100);
__delay_ms(100);
__delay_ms(100);
}
}
void adc_convert(void) {
unsigned long int iv_temp1 = 0;
input_2 = 0;
ADCON0bits.ADON = 1; //Enable A/D module
ADCON0bits.GO_DONE = 1; //Start A/D Conversion
while (ADCON0bits.GO_DONE != 0); //Loop here until A/D conversion
iv_temp1 = ((ADRESH << 8) + ADRESL);
input_2 = (iv_temp1 * 5000uL) >> 10;
ADCON0bits.ADON = 0; //Enable A/D module
fn_display();
}
void fn_display(void) {
unsigned long long int a122, b122, c122, d122, e122, f122, i122, j122, k122, l122;
a122 = 0;
b122 = 0;
c122 = 0;
d122 = 0;
e122 = 0;
f122 = 0;
i122 = 0;
j122 = 0;
k122 = 0;
l122 = 0;
a122 = input_2 / 100000;
b122 = input_2 % 100000;
c122 = b122 / 10000;
d122 = b122 % 10000;
e122 = d122 / 1000;
f122 = d122 % 1000;
i122 = f122 / 100;
j122 = f122 % 100;
k122 = j122 / 10;
l122 = j122 % 10;
lcd_goto(2, 1);
lcd_puts("ADC Value ");
lcd_put_num(a122);
lcd_put_num(c122);
lcd_put_num(e122);
lcd_put_num(i122);
lcd_put_num(k122);
lcd_put_num(l122);
__delay_ms(100);
__delay_ms(100);
}
This is the code use to interface Analog signal with PIC18F4520 with 74HC4051.After reading the value,it's displayed for reference.
If the multiplexer is operated with single output selection in 7HC4051 means,ADC value shown in the display is correct.
If multiple output is selected as like above,the value shown in display are interchanged.
Like sensor 1 value displayed in sensor 2,sensor 2 value displayed in sensor 3,and sensor 3 value displayed in sensor 1.