demo of driving MAX2719 dot matrix displays with STM32F103 Bluepill
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f103-dotmatrix/project/bus/event_queue.c

67 lines
922 B

#include "event_queue.h"
#include "com/debug.h"
/** Task queue */
static CircBuf *tq;
/** Event queue */
static CircBuf *eq;
void queues_init(size_t tq_size, size_t eq_size)
{
tq = cbuf_create(tq_size, sizeof(QueuedTask));
eq = cbuf_create(eq_size, sizeof(Event));
}
bool tq_post(void (*handler)(void*), void *arg)
{
QueuedTask task;
task.handler = handler;
task.arg = arg;
bool suc = cbuf_append(tq, &task);
if (!suc) error("TQ overflow");
return suc;
}
bool eq_post(const Event *event)
{
bool suc = cbuf_append(eq, event);
if (!suc) {
error("EQ overflow, evt %d", event->type);
}
return suc;
}
bool tq_poll_one(void)
{
QueuedTask task;
// serve all tasks
bool suc = cbuf_pop(tq, &task);
if (suc) {
task.handler(task.arg);
}
return suc;
}
void tq_poll(void)
{
// serve all tasks
while (tq_poll_one());
}
bool eq_take(Event *dest)
{
bool suc = cbuf_pop(eq, dest);
return suc;
}