Basic example showing the CMSIS-RTOS queue and memory pool API
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_queue
queue example
main.cpp@1:85e3058aad0f, 2012-07-13 (annotated)
- Committer:
- emilmont
- Date:
- Fri Jul 13 14:57:51 2012 +0000
- Revision:
- 1:85e3058aad0f
- Parent:
- 0:2fa481f0d15a
- Child:
- 2:54e171ca91a6
First implementation
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 1:85e3058aad0f | 1 | #include "mbed.h" |
emilmont | 1:85e3058aad0f | 2 | #include "cmsis_os.h" |
emilmont | 1:85e3058aad0f | 3 | |
emilmont | 1:85e3058aad0f | 4 | typedef struct { |
emilmont | 1:85e3058aad0f | 5 | float voltage; /* AD result of measured voltage */ |
emilmont | 1:85e3058aad0f | 6 | float current; /* AD result of measured current */ |
emilmont | 1:85e3058aad0f | 7 | uint32_t counter; /* A counter value */ |
emilmont | 1:85e3058aad0f | 8 | } message_t; |
emilmont | 1:85e3058aad0f | 9 | |
emilmont | 1:85e3058aad0f | 10 | osPoolDef(mpool, 16, message_t); |
emilmont | 1:85e3058aad0f | 11 | osPoolId mpool; |
emilmont | 1:85e3058aad0f | 12 | |
emilmont | 1:85e3058aad0f | 13 | osMessageQDef(queue, 16, message_t); |
emilmont | 1:85e3058aad0f | 14 | osMessageQId queue; |
emilmont | 1:85e3058aad0f | 15 | |
emilmont | 1:85e3058aad0f | 16 | void send_thread (void const *argument) { |
emilmont | 1:85e3058aad0f | 17 | uint32_t i = 0; |
emilmont | 1:85e3058aad0f | 18 | while (true) { |
emilmont | 1:85e3058aad0f | 19 | i++; // fake data update |
emilmont | 1:85e3058aad0f | 20 | message_t *message = (message_t*)osPoolAlloc(mpool); |
emilmont | 1:85e3058aad0f | 21 | message->voltage = (i * 0.1) * 33; |
emilmont | 1:85e3058aad0f | 22 | message->current = (i * 0.1) * 11; |
emilmont | 1:85e3058aad0f | 23 | message->counter = i; |
emilmont | 1:85e3058aad0f | 24 | osMessagePut(queue, (uint32_t)message, osWaitForever); |
emilmont | 1:85e3058aad0f | 25 | osDelay(1000); |
emilmont | 1:85e3058aad0f | 26 | } |
emilmont | 1:85e3058aad0f | 27 | } |
emilmont | 1:85e3058aad0f | 28 | |
emilmont | 1:85e3058aad0f | 29 | osThreadDef(send_thread, osPriorityNormal, DEFAULT_STACK_SIZE); |
emilmont | 1:85e3058aad0f | 30 | |
emilmont | 1:85e3058aad0f | 31 | int main (void) { |
emilmont | 1:85e3058aad0f | 32 | mpool = osPoolCreate(osPool(mpool)); |
emilmont | 1:85e3058aad0f | 33 | queue = osMessageCreate(osMessageQ(queue), NULL); |
emilmont | 1:85e3058aad0f | 34 | |
emilmont | 1:85e3058aad0f | 35 | osThreadCreate(osThread(send_thread), NULL); |
emilmont | 1:85e3058aad0f | 36 | |
emilmont | 1:85e3058aad0f | 37 | while (true) { |
emilmont | 1:85e3058aad0f | 38 | osEvent evt = osMessageGet(queue, osWaitForever); |
emilmont | 1:85e3058aad0f | 39 | if (evt.status == osEventMessage) { |
emilmont | 1:85e3058aad0f | 40 | message_t *message = (message_t*)evt.value.p; |
emilmont | 1:85e3058aad0f | 41 | printf("\nVoltage: %.2f V\n\r" , message->voltage); |
emilmont | 1:85e3058aad0f | 42 | printf("Current: %.2f A\n\r" , message->current); |
emilmont | 1:85e3058aad0f | 43 | printf("Number of cycles: %u\n\r", message->counter); |
emilmont | 1:85e3058aad0f | 44 | |
emilmont | 1:85e3058aad0f | 45 | osPoolFree(mpool, message); |
emilmont | 1:85e3058aad0f | 46 | } |
emilmont | 1:85e3058aad0f | 47 | } |
emilmont | 1:85e3058aad0f | 48 | } |