92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
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#include <detpic32.h>
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#define SAMPLES 4
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volatile int voltage = 0;
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const unsigned int dis7Scodes[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D,
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0xFD, 0x07, 0x7F, 0x6F, 0x77, 0xFC,
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0x39, 0x5E, 0xF9, 0xF1};
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typedef enum { HIGH, LOW } display;
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void send2displays(unsigned char value) {
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static display flag = LOW;
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value = ((value / 10) << 4) + (value % 10);
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unsigned char high = dis7Scodes[value >> 4];
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unsigned char low = dis7Scodes[value & 0x0F];
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if (flag == HIGH) {
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LATD = (LATD & 0xFF9F) | 0x0040;
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LATB = (LATB & 0x80FF) | high << 8;
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flag = LOW;
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} else {
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LATD = (LATD & 0xFF9F) | 0x0020;
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LATB = (LATB & 0x80FF) | low << 8;
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flag = HIGH;
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}
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}
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void _int_(4) isr_T1(void) {
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AD1CON1bits.ASAM = 1;
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IFS0bits.T1IF = 0;
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}
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void _int_(12) isr_T3(void) {
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send2displays(voltage);
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IFS0bits.T3IF = 0;
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}
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void _int_(27) isr_adc(void) {
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int *p = (int *)(&ADC1BUF0);
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int media = 0;
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for (; p <= (int *)(&ADC1BUFF); p++)
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media += *p;
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media /= SAMPLES;
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voltage = (media * 33 + 511) / 1023;
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IFS1bits.AD1IF = 0;
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}
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int main() {
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TRISB &= 0x80FF;
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TRISD &= 0xFF9F;
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TRISBbits.TRISB4 = 1;
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AD1PCFGbits.PCFG4 = 0;
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AD1CON1bits.SSRC = 7;
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AD1CON1bits.CLRASAM = 1;
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AD1CON3bits.SAMC = 16;
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AD1CON2bits.SMPI = SAMPLES - 1;
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AD1CHSbits.CH0SA = 4;
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AD1CON1bits.ON = 1;
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IPC6bits.AD1IP = 2;
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IFS1bits.AD1IF = 0;
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IEC1bits.AD1IE = 1;
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// Configure Timer T1 with 5Hz frequency
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T1CONbits.TCKPS = 2;
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PR1 = 62499;
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TMR1 = 0;
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T1CONbits.TON = 1;
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// Configure Timer T3 with 100Hz frequency
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T3CONbits.TCKPS = 2;
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PR3 = 49999;
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TMR3 = 0;
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T3CONbits.TON = 1;
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IPC1bits.T1IP = 2;
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IFS0bits.T1IF = 0;
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IEC0bits.T1IE = 1;
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IPC3bits.T3IP = 2;
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IFS0bits.T3IF = 0;
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IEC0bits.T3IE = 1;
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EnableInterrupts();
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while (1);
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return 0;
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}
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