__xdata struct ao_task *__data ao_cur_task;
void
-ao_add_task(__xdata struct ao_task * task, void (*start)(void))
+ao_add_task(__xdata struct ao_task * task, void (*start)(void), __code char *name) __reentrant
{
uint8_t __xdata *stack;
if (ao_num_tasks == AO_NUM_TASKS)
ao_panic(AO_PANIC_NO_TASK);
ao_tasks[ao_num_tasks++] = task;
task->task_id = ao_num_tasks;
+ task->name = name;
/*
* Construct a stack frame so that it will 'return'
* to the start of the task
if (ao_cur_task_index != AO_NO_TASK_INDEX)
{
- uint8_t stack_len;
- __data uint8_t * stack_ptr;
- __xdata uint8_t * save_ptr;
+ uint8_t stack_len;
+ __data uint8_t *stack_ptr;
+ __xdata uint8_t *save_ptr;
/* Save the current stack */
stack_len = SP - (AO_STACK_START - 1);
ao_cur_task->stack_count = stack_len;
/* Find a task to run. If there isn't any runnable task,
* this loop will run forever, which is just fine
*/
- for (;;) {
- ++ao_cur_task_index;
- if (ao_cur_task_index == ao_num_tasks)
- ao_cur_task_index = 0;
- ao_cur_task = ao_tasks[ao_cur_task_index];
- if (ao_cur_task->wchan == NULL)
- break;
+ {
+ __pdata uint8_t ao_next_task_index = ao_cur_task_index;
+ for (;;) {
+ ++ao_next_task_index;
+ if (ao_next_task_index == ao_num_tasks)
+ ao_next_task_index = 0;
+
+ ao_cur_task = ao_tasks[ao_next_task_index];
+ if (ao_cur_task->wchan == NULL) {
+ ao_cur_task_index = ao_next_task_index;
+ break;
+ }
+
+ /* Enter lower power mode when there isn't anything to do */
+ if (ao_next_task_index == ao_cur_task_index)
+ PCON = PCON_IDLE;
+ }
}
{
uint8_t stack_len;
- __data uint8_t * stack_ptr;
- __xdata uint8_t * save_ptr;
+ __data uint8_t *stack_ptr;
+ __xdata uint8_t *save_ptr;
/* Restore the old stack */
stack_len = ao_cur_task->stack_count;
_endasm;
}
-int
+void
ao_sleep(__xdata void *wchan)
{
__critical {
- ao_cur_task->wchan = wchan;
+ ao_cur_task->wchan = wchan;
}
ao_yield();
}
-int
+void
ao_wakeup(__xdata void *wchan)
{
uint8_t i;
}
void
-ao_start_scheduler(void)
+ao_task_info(void)
{
+ uint8_t i;
+ uint8_t pc_loc;
+ __xdata struct ao_task *task;
+
+ for (i = 0; i < ao_num_tasks; i++) {
+ task = ao_tasks[i];
+ pc_loc = task->stack_count - 17;
+ printf("%12s: wchan %04x pc %04x\n",
+ task->name,
+ (int16_t) task->wchan,
+ (task->stack[pc_loc]) | (task->stack[pc_loc+1] << 8));
+ }
+}
+void
+ao_start_scheduler(void)
+{
ao_cur_task_index = AO_NO_TASK_INDEX;
ao_cur_task = NULL;
ao_yield();