#include <avr/interrupt.h>
#include <avr/io.h>
#include "stdlib.h"
#define DEBUG_DDR DDRB
#define DEBUG_PIN 5
#define DEBUG_PORT PORTB
/* Relay outputs */
#define RELAY_DDR DDRC
#define RELAY_PORT PORTC
#define RELAY_PIN PINC
#define RELAY_PINS 4
#define RELAY_DOWN1 0
#define RELAY_DOWN2 1
#define RELAY_LEFT 2
#define RELAY_RIGHT 3
/* Switch inputs */
static ioport_t *const SWITCH_DDR = &DDRD;
static ioport_t *const SWITCH_PORT = &PORTD;
static ioport_t *const SWITCH_PIN = &PIND;
static ioport_t *const SWITCH_PCMSK = &PCMSK2;
static const byte SWITCH_PCIE = PCIE2;
static const byte SWITCH_PCIF = PCIF2;
enum switch_bits {
SWITCH_LEFT = 0b00000100,
SWITCH_RIGHT = 0b00001000,
SWITCH_HORN1 = 0b00010000,
SWITCH_HORN2 = 0b00100000,
SWITCH_MASK = 0b00111100,
};
#include "debug.h"
#include "relay.h"
#include "serial.h"
#include "switch.h"
#include "timer.h"
int main (void)
{
debug_init();
relay_init(RELAY_PINS);
serial_init(SERIAL_BAUD_9600, SERIAL_PARITY_N, SERIAL_STOPBITS_1);
switch_init();
timer_init();
// init
char c = '.';
byte s;
unsigned short timeout = 8000;
debug_set();
sei();
// start
while (true) {
c = s = 0;
if (timer_sleep(timeout)) {
c = '.';
} else if ((c = serial_read())) {
switch (c) {
case 'L': relay_open(RELAY_LEFT); break;
case 'R': relay_open(RELAY_RIGHT); break;
case 'B':
relay_open(RELAY_DOWN1);
relay_open(RELAY_DOWN2);
break;
case 'l': relay_toggle(RELAY_LEFT); break;
case 'r': relay_toggle(RELAY_RIGHT); break;
case 'b':
relay_close(RELAY_DOWN1);
relay_close(RELAY_DOWN2);
break;
default:
c = '!';
break;
}
} else if (switch_read(&s)) {
c = '*';
if (s & SWITCH_LEFT)
c = 'l';
if (s & SWITCH_RIGHT)
c = 'r';
if (s & SWITCH_HORN1)
c = 'h';
if (s & SWITCH_HORN2)
c = 'h';
} else {
// XXX: for some reason this occasionally gets stuck in an interrupt loop here after some switch events..
c = '?';
}
// out
debug_toggle();
serial_write(c);
}
}