Espressif ESP32-S2 Programming Manual page 947

Chapter 2. API Reference
// group has already been created
EventGroupHandle_t xEventBits;
void vTask0( void *pvParameters )
{
EventBits_t uxReturn;
TickType_t xTicksToWait
for( ;; )
{
// Perform task functionality
// Set bit
// sync point.
// by ALL_SYNC_BITS.
// point when
// for this to
uxReturn =
xTicksToWait );
→
if( ( uxReturn
{
// All three tasks reached the synchronisation point before the call
// to xEventGroupSync() timed
}
}
}
void vTask1( void *pvParameters )
{
for( ;; )
{
// Perform task functionality
// Set bit
// synchronisation
// bits defined by
// synchronisation point when
// indefinitely
xEventGroupSync( xEventBits, TASK_1_BIT, ALL_SYNC_BITS, portMAX_DELAY );
// xEventGroupSync() was called
// this task will only reach here
// three tasks, so there
}
}
void vTask2( void *pvParameters )
{
for( ;; )
{
// Perform task functionality
// Set bit
// synchronisation
// bits defined by
// synchronisation point when
// indefinitely
xEventGroupSync( xEventBits, TASK_2_BIT, ALL_SYNC_BITS, portMAX_DELAY );
// xEventGroupSync() was called
Espressif Systems
elsewhere.
= 100 / portTICK_PERIOD_MS;
here.
0 in the event flag to note this task has reached the
The other two tasks will
All three tasks have reached the synchronisation
all the ALL_SYNC_BITS are
happen.
xEventGroupSync( xEventBits, TASK_0_BIT,
& ALL_SYNC_BITS )
here.
1 in the event flag to note this task has reached the
point. The other two tasks will
ALL_SYNC_BITS.
all
for this to happen.
is no need to test the
here.
2 in the event flag to note this task has reached the
point. The other two tasks will
ALL_SYNC_BITS.
all
for this to happen.
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set the other two bits defined
set. Wait a maximum of 100ms
== ALL_SYNC_BITS )
out.
All three tasks have reached the
the ALL_SYNC_BITS are
with an indefinite block time, so
if the synchronisation was made by
return
All three tasks have reached the
the ALL_SYNC_BITS are
with an indefinite block time, so
936
(continued from previous page)
ALL_SYNC_BITS,␣
set the other two
set. Wait
all
value.
set the other two
set. Wait
(continues on next page)
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