Basic example showing the CMSIS-RTOS queue API with a producer in an ISR and a consumer in a normal thread
mbed 2 and mbed OS 5
This is an mbed 2 example. mbed OS 5 has integrated the mbed library with mbed-rtos. For an mbed-os example, please see:
Import programrtos_isr
isr example
main.cpp@1:aa8ea13b6a07, 2012-07-13 (annotated)
- Committer:
- emilmont
- Date:
- Fri Jul 13 16:13:14 2012 +0000
- Revision:
- 1:aa8ea13b6a07
- Parent:
- 0:c8b166e5c984
- Child:
- 2:39180377e223
First implementation
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 1:aa8ea13b6a07 | 1 | #include "mbed.h" |
emilmont | 1:aa8ea13b6a07 | 2 | #include "cmsis_os.h" |
emilmont | 1:aa8ea13b6a07 | 3 | |
emilmont | 1:aa8ea13b6a07 | 4 | osMessageQDef(queue, 5, message_t); |
emilmont | 1:aa8ea13b6a07 | 5 | osMessageQId queue; |
emilmont | 1:aa8ea13b6a07 | 6 | |
emilmont | 1:aa8ea13b6a07 | 7 | DigitalOut myled(LED1); |
emilmont | 1:aa8ea13b6a07 | 8 | |
emilmont | 1:aa8ea13b6a07 | 9 | void queue_isr() { |
emilmont | 1:aa8ea13b6a07 | 10 | osMessagePut(queue, (uint32_t)2, 0); |
emilmont | 1:aa8ea13b6a07 | 11 | |
emilmont | 1:aa8ea13b6a07 | 12 | myled = !myled; |
emilmont | 1:aa8ea13b6a07 | 13 | } |
emilmont | 1:aa8ea13b6a07 | 14 | |
emilmont | 1:aa8ea13b6a07 | 15 | void queue_thread(void const *argument) { |
emilmont | 1:aa8ea13b6a07 | 16 | while (true) { |
emilmont | 1:aa8ea13b6a07 | 17 | osMessagePut(queue, 1, 0); |
emilmont | 1:aa8ea13b6a07 | 18 | osDelay(1000); |
emilmont | 1:aa8ea13b6a07 | 19 | } |
emilmont | 1:aa8ea13b6a07 | 20 | } |
emilmont | 1:aa8ea13b6a07 | 21 | |
emilmont | 1:aa8ea13b6a07 | 22 | osThreadDef(queue_thread, osPriorityNormal, DEFAULT_STACK_SIZE); |
emilmont | 1:aa8ea13b6a07 | 23 | |
emilmont | 1:aa8ea13b6a07 | 24 | int main (void) { |
emilmont | 1:aa8ea13b6a07 | 25 | queue = osMessageCreate(osMessageQ(queue), NULL); |
emilmont | 1:aa8ea13b6a07 | 26 | |
emilmont | 1:aa8ea13b6a07 | 27 | osThreadCreate(osThread(queue_thread), NULL); |
emilmont | 1:aa8ea13b6a07 | 28 | |
emilmont | 1:aa8ea13b6a07 | 29 | Ticker ticker; |
emilmont | 1:aa8ea13b6a07 | 30 | ticker.attach(queue_isr, 1.0); |
emilmont | 1:aa8ea13b6a07 | 31 | |
emilmont | 1:aa8ea13b6a07 | 32 | while (true) { |
emilmont | 1:aa8ea13b6a07 | 33 | osEvent evt = osMessageGet(queue, osWaitForever); |
emilmont | 1:aa8ea13b6a07 | 34 | if (evt.status != osEventMessage) { |
emilmont | 1:aa8ea13b6a07 | 35 | printf("queue->get() returned %02x status\n\r", evt.status); |
emilmont | 1:aa8ea13b6a07 | 36 | } else { |
emilmont | 1:aa8ea13b6a07 | 37 | printf("queue->get() returned %d\n\r", evt.value.v); |
emilmont | 1:aa8ea13b6a07 | 38 | } |
emilmont | 1:aa8ea13b6a07 | 39 | } |
emilmont | 1:aa8ea13b6a07 | 40 | } |