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kbd_task: Replace renderingInProgress() check with display mutex

This commit is contained in:
Federico Amedeo Izzo 2020-12-17 22:30:08 +01:00
parent 3c00802330
commit 67aac8a68e
1 changed files with 49 additions and 39 deletions
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18
openrtx/src/threads.c
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@ -38,6 +38,9 @@ static OS_Q ui_queue;
/* Mutex for concurrent access to RTX state variable */
static OS_MUTEX rtx_mutex;
/* Mutex to avoid reading keyboard during display update */
static OS_MUTEX display_mutex;
/**************************** IMPORTANT NOTE ***********************************
* *
* Rationale for "xx_TASK_STKSIZE/sizeof(CPU_STK)": uC/OS-III manages task *
@ -107,7 +110,10 @@ static void ui_task(void *arg)
if(renderNeeded)
{
// Lock display mutex and render display
OSMutexPend(&display_mutex, 0u, OS_OPT_PEND_BLOCKING, 0u, &os_err);
gfx_render();
OSMutexPost(&display_mutex, OS_OPT_POST_NONE, &os_err);
}
// We don't need a delay because we lock on incoming events
@ -138,10 +144,10 @@ static void kbd_task(void *arg)
while(1)
{
if(!gfx_renderingInProgress())
{
// Get currently pressed keys
// Lock display mutex and read keyboard status
OSMutexPend(&display_mutex, 0u, OS_OPT_PEND_BLOCKING, 0u, &os_err);
keys = kbd_getKeys();
OSMutexPost(&display_mutex, OS_OPT_POST_NONE, &os_err);
// Compare with previous keyboard status
if(keys != prev_keys)
{
@ -184,7 +190,6 @@ static void kbd_task(void *arg)
// Save current keyboard state as previous
prev_keys = keys;
}
}
// Read keyboard state at 20Hz
OSTimeDlyHMSM(0u, 0u, 0u, 50u, OS_OPT_TIME_HMSM_STRICT, &os_err);
}
@ -260,6 +265,11 @@ void create_threads()
(CPU_CHAR *) "RTX Mutex",
(OS_ERR *) &os_err);
// Create display mutex
OSMutexCreate((OS_MUTEX *) &display_mutex,
(CPU_CHAR *) "Display Mutex",
(OS_ERR *) &os_err);
// State initialization, execute before starting all tasks
state_init();