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#include <stddef.h>
#include <sched/sched.h>
#include <time/timer.h>
#include <bug/panic.h>
#include <bug/debug.h>
#include <tshield/tshield.h>
#include <collection/list.h>
#define WAIT_CYCLES(cycles) for (volatile unsigned long i = 0; i < cycles; ++i) {}
static struct list_head frozen = LIST_HEAD_INIT(frozen);
void freeze() __attribute__ ( ( naked ) );
void freeze() {
cli();
SAVE_CONTEXT();
sleep_on(&frozen);
schedule();
RESTORE_CONTEXT();
sei();
asm volatile ( "ret" );
}
void wake() __attribute__ ( ( naked ) );
void wake() {
cli();
SAVE_CONTEXT();
wake_all(&frozen);
RESTORE_CONTEXT();
sei();
asm volatile ( "ret" );
}
void blink( char id) {
while(1) {
debug_led(id,1);
//yield();
WAIT_CYCLES(5000);
debug_led(id,0);
//yield();
WAIT_CYCLES(5000);
freeze();
}
}
void read(char id) {
while(1) {
debug_led(0, 0);
debug_led(3, 0);
unsigned char buttons = tshield_read();
if (buttons != 0) {
wake();
debug_led(0, 1);
unsigned int counter = 0;
if (counter > 0) {
debug_led(3, 1);
}
if (list_empty(&frozen)) {
debug_led(3, 1);
}
}
}
}
DECLARE_TASK(task1, STACK_SIZE, blink);
DECLARE_TASK(task2, STACK_SIZE, blink);
DECLARE_TASK(task3, STACK_SIZE, blink);
DECLARE_TASK(task4, STACK_SIZE, read);
int main(int argc, char *argv[]) {
cli();
tshield_init();
timer_init();
spawn(&task1, 1);
spawn(&task2, 2);
spawn(&task3, 3);
spawn(&task4, 4);
timer_start();
sched_init();
while(1){}
}
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