//Use a timer to trigger an ISr
#define TIMER_DIVIDER 10000
-#define TIMER_COUNT 1000
+#define TIMER_COUNT 100
#define TIMER_NUMBER 0
-#define SET_BITS 0xAA
-#define CLEAR_BITS 0x55
+#define BITS 0xAA
-static bool event_grp_cleared = false;
+static timer_isr_handle_t isr_handle;
+static bool test_set_bits;
+static bool test_clear_bits;
static void IRAM_ATTR event_group_isr()
{
+ portBASE_TYPE task_woken = pdFALSE;
TIMERG0.int_clr_timers.t0 = 1;
TIMERG0.hw_timer[xPortGetCoreID()].config.alarm_en = 1;
- if(!event_grp_cleared){
- xEventGroupClearBitsFromISR(eg, CLEAR_BITS);
- event_grp_cleared = true;
- }else{
- xEventGroupSetBitsFromISR(eg, SET_BITS, NULL);
+
+ if(test_set_bits){
+ xEventGroupSetBitsFromISR(eg, BITS, &task_woken);
+ timer_pause(TIMER_GROUP_0, TIMER_NUMBER);
+ test_set_bits = false;
+ } else if (test_clear_bits){
+ xEventGroupClearBitsFromISR(eg, BITS);
+ xSemaphoreGiveFromISR(done_sem, &task_woken);
timer_pause(TIMER_GROUP_0, TIMER_NUMBER);
+ test_clear_bits = false;
+ }
+ //Switch context if necessary
+ if(task_woken == pdTRUE){
+ portYIELD_FROM_ISR();
}
}
-
-static void test_event_group_trace_facility(void* arg)
+static void setup_timer()
{
//Setup timer for ISR
int timer_group = TIMER_GROUP_0;
timer_set_alarm_value(timer_group, timer_idx, TIMER_COUNT); //Set alarm value
timer_enable_intr(timer_group, timer_idx); //Enable timer interrupt
timer_set_auto_reload(timer_group, timer_idx, 1); //Auto Reload
- timer_isr_register(timer_group, timer_idx, event_group_isr, NULL, ESP_INTR_FLAG_IRAM, NULL); //Set ISR handler
-
- //Start timer to trigger isr
- timer_start(TIMER_GROUP_0, TIMER_NUMBER);
- TEST_ASSERT(xEventGroupWaitBits(eg, SET_BITS, pdFALSE, pdTRUE, portMAX_DELAY));
- //Check clear was successful
- TEST_ASSERT((xEventGroupGetBits(eg) & CLEAR_BITS) == 0);
-
- //Give semaphore to signal done
- xSemaphoreGive(done_sem);
- vTaskDelete(NULL);
+ timer_isr_register(timer_group, timer_idx, event_group_isr, NULL, ESP_INTR_FLAG_IRAM, &isr_handle); //Set ISR handler
+}
+static void cleanup_timer()
+{
+ timer_disable_intr(TIMER_GROUP_0, TIMER_NUMBER);
+ esp_intr_free(isr_handle);
}
TEST_CASE("FreeRTOS Event Group ISR", "[freertos]")
{
-
done_sem = xSemaphoreCreateBinary();
eg = xEventGroupCreate();
- xEventGroupSetBits(eg, CLEAR_BITS); //Set bits to be cleared by ISR
+ test_set_bits = false;
+ test_clear_bits = false;
+ setup_timer(); //Init timer to trigger ISR
- xTaskCreatePinnedToCore(test_event_group_trace_facility, "Testing Task", 4096, NULL, configMAX_PRIORITIES - 1, NULL, 0);
+ //Test set bits
+ test_set_bits = true;
+ timer_start(TIMER_GROUP_0, TIMER_NUMBER);
+ TEST_ASSERT_EQUAL(BITS, xEventGroupWaitBits(eg, BITS, pdFALSE, pdTRUE, portMAX_DELAY)); //Let ISR set event group bits
+
+ //Test clear bits
+ xEventGroupSetBits(eg, BITS); //Set bits to be cleared
+ test_clear_bits = true;
+ timer_start(TIMER_GROUP_0, TIMER_NUMBER);
+ xSemaphoreTake(done_sem, portMAX_DELAY); //Wait for ISR to clear bits
+ vTaskDelay(10); //Event group clear bits runs via daemon task, delay so daemon can run
+ TEST_ASSERT_EQUAL(0, xEventGroupGetBits(eg)); //Check bits are cleared
- //Wait until task and isr have finished testing
- xSemaphoreTake(done_sem, portMAX_DELAY);
//Clean up
- vSemaphoreDelete(done_sem);
+ cleanup_timer();
vEventGroupDelete(eg);
-
- vTaskDelay(10); //Give time for idle task to clear up delted tasks
-
+ vSemaphoreDelete(done_sem);
+ vTaskDelay(10); //Give time for idle task to clear up deleted tasks
}
#endif //CONFIG_FREERTOS_USE_TRACE_FACILITY