73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
#include <avr/io.h>
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#include <util/delay.h>
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#include "utils.h"
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#include "bitmanip.h"
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typedef struct {
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int *value;
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int max;
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int min;
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} IncrementParams;
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void print_binary(int value) {
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int mask_3 = 0b1000;
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int bit_at_3 = value & mask_3;
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int bit_at_4 = bit_at_3 << 1;
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PORTB = (value & 0b111) + bit_at_4;
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}
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void increment_int(IncrementParams *params) {
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int *value = params->value;
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int max = params->max;
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*value = (*value >= max) ? max : ++(*value);
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}
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void decrement_int(IncrementParams *params) {
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int *value = params->value;
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int min = params->min;
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*value = (*value <= min) ? min : --(*value);
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}
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void increment_led(void *param) {
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IncrementParams *params = (IncrementParams *)param;
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increment_int(params);
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print_binary(*(params->value));
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}
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void decrement_led(void *param) {
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IncrementParams *params = (IncrementParams *)param;
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decrement_int(params);
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print_binary(*(params->value));
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}
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void on_press(int bit, void (*action)(void*), void *params) {
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if ((TEST(PIND, bit)) == 0) {
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action(params);
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_delay_ms(20);
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while ((TEST(PIND, bit)) == 0) {
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continue;
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}
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_delay_ms(20);
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}
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}
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// write a program that increments and decrements a binary number using the buttons, and displays the result on the LEDs
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int main() {
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MODE_OUTPUT(LED1);
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MODE_OUTPUT(LED2);
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MODE_OUTPUT(LED3);
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MODE_OUTPUT(LED4);
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MODE_INPUT(BUTTON1);
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MODE_INPUT(BUTTON2);
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int value = 0;
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int max = 15;
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int min = 0;
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IncrementParams params = {&value, max};
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while(1) {
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on_press(SW1, increment_led, ¶ms);
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on_press(SW2, decrement_led, ¶ms);
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}
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} |