simple button-only gamepad project where a Pro Mini is built into the gamepad case and sends keys over UART
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arduino-gamepad/main.c

96 lines
1.7 KiB

#include <avr/io.h> // register definitions
#include <avr/pgmspace.h> // storing data in program memory
#include <avr/interrupt.h> // interrupt vectors
#include <util/delay.h> // delay functions
#include <stdint.h>
#include <stdbool.h>
// Include stuff from the library
#include "lib/iopins.h"
#include "lib/usart.h"
#include "lib/debounce.h"
/* uppercase key names */
static const char names[] = {
'L', // 2
'U', // 3
'R', // 4
'D', // 5
'I', // 6
'J', // 7
'K', // 8
'X', // 9
'B', // 10
'A', // 11
'Y', // 12
};
/* nr of keys down */
uint8_t down = 0;
static void pin_change_handler(uint8_t n, bool state)
{
char c = names[n];
if (!state) {
c += 32; // lowecase
}
if (state) {
down++;
} else {
down--;
}
pin_set(9, (bool)(down > 0));
usart_tx((uint8_t) c);
}
static void hw_init(void)
{
usart_init(BAUD_115200);
as_input_pu(2);
as_input_pu(3);
as_input_pu(4);
as_input_pu(5);
as_input_pu(6);
as_input_pu(7);
as_input_pu(8);
// 9 - LED
as_output(9); // front LED
as_output(13); // LED on pro mini
as_input_pu(10);
as_input_pu(11);
as_input_pu(12);
as_input_pu(14);
// cant use loop because macros
debo_add(2, true, pin_change_handler);
debo_add(3, true, pin_change_handler);
debo_add(4, true, pin_change_handler);
debo_add(5, true, pin_change_handler);
debo_add(6, true, pin_change_handler);
debo_add(7, true, pin_change_handler);
debo_add(8, true, pin_change_handler);
debo_add(14, true, pin_change_handler);
debo_add(10, true, pin_change_handler);
debo_add(11, true, pin_change_handler);
debo_add(12, true, pin_change_handler);
}
void main(void)
{
hw_init();
int cnt = 0;
while (1) {
_delay_ms(1);
debo_tick();
}
}