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victor
parent
b1173ebc9e
commit
311fc684c8
2
Makefile
2
Makefile
@ -6,7 +6,7 @@ SRC := main.c
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CC = avr-gcc
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INCLUDE := /usr/avr
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CFLAGS := -mmcu=atmega32u4 -DF_CPU=8000000UL -I$(INCLUDE)
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CFLAGS := -mmcu=atmega32u4 -DF_CPU=16000000UL -I$(INCLUDE)
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all:
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$(CC) $(CFLAGS) -Os $(SRC) -o main.elf
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103
main.c
103
main.c
@ -1,6 +1,5 @@
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#include <stdint.h>
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#define F_CPU 8000000UL // 8 MHz
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include <avr/io.h>
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@ -13,9 +12,13 @@
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#define SEG_DIG3 (1 << PF4)
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#define SEG_DIG4 (1 << PF1)
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#define HCSR04_TRIG (1 << PB7)
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#define HCSR04_ECHO (1 << PB6)
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#define SWITCH_IN (1 << PF7)
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void init_3461BS() {
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DDRF |= SEG_DIG1 | SEG_DIG2 | SEG_DIG3 | SEG_DIG4;
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PORTF &= ~(SEG_DIG1 | SEG_DIG2 | SEG_DIG3 | SEG_DIG4);
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}
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@ -29,7 +32,7 @@ void init_74HC595() {
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}
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const uint8_t digit_segments[] = {
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0b11111110, // 0
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0b10000001, // 0
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0b11001111, // 1
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0b10010010, // 2
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0b10000110, // 3
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@ -42,7 +45,7 @@ const uint8_t digit_segments[] = {
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};
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void send_serial_byte(uint8_t n) {
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for (int i = 7; i > 0; i--) {
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for (int i = 0; i < 8; i++) {
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if (n & (1 << i)) {
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PORTC |= SN74_SER;
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}
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@ -50,44 +53,82 @@ void send_serial_byte(uint8_t n) {
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PORTC &= ~SN74_SER;
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}
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PORTE |= SN74_SRCLK;
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_delay_ms(100);
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PORTE &= ~SN74_SRCLK;
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PORTC &= ~SN74_SER;
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_delay_ms(100);
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}
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PORTB |= SN74_RCLK;
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_delay_ms(100);
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PORTB &= ~SN74_RCLK;
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}
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int main() {
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void init_HCSR04() {
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DDRF &= ~(SWITCH_IN);
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PORTF |= SWITCH_IN;
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DDRB |= HCSR04_TRIG;
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DDRB &= ~(HCSR04_ECHO);
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PORTB |= HCSR04_ECHO | HCSR04_TRIG;
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}
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void setup() {
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init_74HC595();
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init_3461BS();
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init_HCSR04();
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}
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uint16_t measure_distance() {
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float duration, distance = 0;
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PORTB &= ~HCSR04_TRIG;
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_delay_us(2);
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PORTB |= HCSR04_TRIG;
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_delay_us(10);
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PORTB &= ~HCSR04_TRIG;
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while (!(PINB & HCSR04_ECHO));
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TCNT1 = 0;
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TCCR1B = (1 << CS11);
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while (PINB & HCSR04_ECHO) ;
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uint16_t ticks = TCNT1;
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TCCR1B = 0;
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distance = (((float)ticks / 2) * 0.0343) /2;
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return distance;
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}
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int main() {
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setup();
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uint16_t measure = 0;
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while (1) {
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for (int i = 0; i < 255; i++) {
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for(int j = 0; j < 100; j++) {
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PORTF |= SEG_DIG1;
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send_serial_byte(digit_segments[i / 1000]);
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_delay_ms(2);
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PORTF &= ~SEG_DIG1;
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PORTF |= SEG_DIG2;
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send_serial_byte(digit_segments[(i / 100) % 10]);
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_delay_ms(2);
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PORTF &= ~SEG_DIG2;
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PORTF |= SEG_DIG3;
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send_serial_byte(digit_segments[(i / 10) % 10]);
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_delay_ms(2);
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PORTF &= ~SEG_DIG3;
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PORTF |= SEG_DIG4;
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send_serial_byte(digit_segments[i % 10]);
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_delay_ms(2);
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PORTF &= ~SEG_DIG4;
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}
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if (!(PINF & SWITCH_IN)) {
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measure = measure_distance();
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}
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send_serial_byte(digit_segments[measure / 1000]);
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PORTF |= SEG_DIG1;
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_delay_ms(2);
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PORTF &= ~SEG_DIG1;
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send_serial_byte(digit_segments[(measure / 100) % 10]);
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PORTF |= SEG_DIG2;
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_delay_ms(2);
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PORTF &= ~SEG_DIG2;
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send_serial_byte(digit_segments[(measure / 10) % 10]);
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PORTF |= SEG_DIG3;
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_delay_ms(2);
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PORTF &= ~SEG_DIG3;
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send_serial_byte(digit_segments[measure % 10]);
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PORTF |= SEG_DIG4;
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_delay_ms(2);
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PORTF &= ~SEG_DIG4;
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}
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}
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100
main.hex
100
main.hex
@ -9,36 +9,74 @@
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:100080000C946B000C946B000C946B000C946B0044
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:100090000C946B000C946B000C946B000C946B0034
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:00000001FF
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