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https://github.com/aster94/logic-analyzer.git
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138 lines
3.2 KiB
C++
138 lines
3.2 KiB
C++
/*
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* UNO.ino
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*
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* Created: 11/12/2016 19.35.51
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* Author : Vincenzo
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* Led on A0
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*/
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#define baudrate 115200 // check if it is the same in processing
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#define samples 200 // the number of samples you want to take
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#define timezerooffset 125 //microsegundos
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#define F_CPU 16000000UL
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#define prescaler 0x02
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volatile uint16_t timer1_overflow_count;
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uint8_t initial, state, old_state;
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uint8_t pinChanged[samples];
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uint32_t timer[samples];
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uint32_t timefix;
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uint16_t event = 0;
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void init_board() {
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PORTC = (0 << 0); DDRC |= (1 << 0); // led A0
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DDRB |= 0x00; // pin 8-13 input
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PORTB |= 0x3F; // pull-up
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}
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void init_timer() {
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//clear
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TCCR1A = 0b00000000;
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TCCR1B = 0b00000000;
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TIMSK1 = 0b00000000;
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//settings
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TCCR1A |= (0 << COM1A1) | (0 << COM1A0) | (0 << COM1B1) | (0 << COM1B0); //normal port operation
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TCCR1A |= (0 << WGM11) | (0 << WGM10); //normal operation
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TCCR1B |= (0 << WGM13) | (0 << WGM12); //normal operation
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TCCR1B |= prescaler; //(0 << CS12) | (0 << CS11) | (1 << CS10); //clock prescaler
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sei(); //enable interrupts
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TIMSK1 |= (1 << TOIE1); // enable overflow interrupt
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}
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ISR(TIMER1_OVF_vect) {
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timer1_overflow_count++;
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}
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void reset_timer1 () {
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TCNT1 = 0;
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timer1_overflow_count = 0;
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}
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uint32_t myMicros () {
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cli();
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if (TIFR1 & (1 << TOV1)) {
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TIFR1 = (0 << TOV1);
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timer1_overflow_count++;
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}
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uint32_t total_time = (65536 * timer1_overflow_count + TCNT1) / 2;
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sei();
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return total_time;
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}
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void start() {
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_delay_ms(1000);
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reset_timer1();
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event = 0;
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PORTC = (1 << 0);
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initial = PINB;
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state = initial;
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for (int i=0; i < samples; i++) {
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pinChanged[i]=0;
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}
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}
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void sendData() {
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PORTC = (0 << 0); //turn off led
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//initial data
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Serial.println("S");
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Serial.print(initial); Serial.print(','); Serial.print(B11111111); Serial.print(','); Serial.print(B11111111); Serial.print(":");
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Serial.println(samples+2);
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timefix = -timer[0]+timezerooffset;
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for (int i = 0; i < samples; i++) {
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timer[i]=timer[i]+timefix;
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}
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Serial.print(B11111111);Serial.print(','); Serial.print(B11111111); Serial.print(','); Serial.print(B11111111); Serial.print(":");//Este segmento de codigo introduce un cambio en todos los
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Serial.println(0); //canales evita fallo visual.
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//data
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for (int i = 0; i < samples; i++) {
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Serial.print(pinChanged[i]);Serial.print(','); Serial.print(B00000000); Serial.print(','); Serial.print(B00000000); Serial.print(":");
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Serial.println(timer[i]);
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}
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Serial.print(B11111111);Serial.print(','); Serial.print(B11111111); Serial.print(','); Serial.print(B11111111); Serial.print(":");
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Serial.println((timer[samples-1]+400));
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}
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int main(void) {
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Serial.begin(baudrate);
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init_board();
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init_timer();
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start();
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while (1) {
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old_state = state;
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state = PINB;
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if (old_state != state) {
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timer[event] = myMicros();
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pinChanged[event] = state ^ old_state;
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event++;
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if (event == samples) {
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sendData();
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while (Serial.read() != 'G') ; //wait for the "go"
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start();
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}
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}
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}
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}
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