maix-embedded/day00
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

chore(comments/format): commented and formatted all the c files

Browse source
This commit is contained in:
Maix0 2026-04-14 09:56:31 +02:00
parent f52ce027a6
commit dbcc449552
5 changed files with 157 additions and 72 deletions
Download patch file Download diff file Expand all files Collapse all files

87
ex04/main.c
View file

@ -4,52 +4,59 @@
#include <stdbool.h>
#define D1 PB0
#define D2 PB1
#define D3 PB2
#define D4 PB4
#define D1 PB0
#define D2 PB1
#define D3 PB2
#define D4 PB4
#define SW1 PD2
#define SW2 PD4
int main(void) {
DDRB |= _BV(D4);
DDRB |= _BV(D3);
DDRB |= _BV(D2);
DDRB |= _BV(D1);
// ouput pins for leds
DDRB |= _BV(D4);
DDRB |= _BV(D3);
DDRB |= _BV(D2);
DDRB |= _BV(D1);
DDRD &= ~(_BV(SW1));
DDRD &= ~(_BV(SW2));
// set input (not neccessary since input by default)
DDRD &= ~(_BV(SW1));
DDRD &= ~(_BV(SW2));
PORTB |= _BV(D4);
PORTB |= _BV(D4);
uint8_t prev = 0;
uint8_t value = 0;
while (true) {
uint8_t cur = (PIND & (_BV(SW1) | _BV(SW2)));
if (prev & (_BV(SW1)) && !(cur & (_BV(SW1)))) {
value++;
}
if (prev & (_BV(SW2)) && !(cur & (_BV(SW2)))) {
value--;
}
prev = cur;
if (value & 0b0001)
PORTB |= (_BV(D1));
else
PORTB &= ~(_BV(D1));
if (value & 0b0010)
PORTB |= (_BV(D2));
else
PORTB &= ~(_BV(D2));
if (value & 0b0100)
PORTB |= (_BV(D3));
else
PORTB &= ~(_BV(D3));
if (value & 0b1000)
PORTB |= (_BV(D4));
else
PORTB &= ~(_BV(D4));
_delay_ms(20);
}
uint8_t prev = 0;
uint8_t value = 0;
while (true) {
// lets read both button in a single byte, and keep track of that too
uint8_t cur = (PIND & (_BV(SW1) | _BV(SW2)));
// check for button SW1
if (prev & (_BV(SW1)) && !(cur & (_BV(SW1)))) {
value++;
}
// check for button SW2
if (prev & (_BV(SW2)) && !(cur & (_BV(SW2)))) {
value--;
}
prev = cur;
// for each bit of the counter -> lets turn on or of the led
if (value & 0b0001)
PORTB |= (_BV(D1));
else
PORTB &= ~(_BV(D1));
if (value & 0b0010)
PORTB |= (_BV(D2));
else
PORTB &= ~(_BV(D2));
if (value & 0b0100)
PORTB |= (_BV(D3));
else
PORTB &= ~(_BV(D3));
if (value & 0b1000)
PORTB |= (_BV(D4));
else
PORTB &= ~(_BV(D4));
_delay_ms(20);
}
}