Basic example showing the CMSIS-RTOS mail 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_mail
mail example
main.cpp@1:4a9c72442136, 2012-07-13 (annotated)
- Committer:
- emilmont
- Date:
- Fri Jul 13 15:03:37 2012 +0000
- Revision:
- 1:4a9c72442136
- Parent:
- 0:9546ebd01d95
- Child:
- 2:e9f14106068c
First implementation
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 1:4a9c72442136 | 1 | #include "mbed.h" |
emilmont | 1:4a9c72442136 | 2 | #include "cmsis_os.h" |
emilmont | 1:4a9c72442136 | 3 | |
emilmont | 1:4a9c72442136 | 4 | typedef struct { |
emilmont | 1:4a9c72442136 | 5 | float voltage; /* AD result of measured voltage */ |
emilmont | 1:4a9c72442136 | 6 | float current; /* AD result of measured current */ |
emilmont | 1:4a9c72442136 | 7 | uint32_t counter; /* A counter value */ |
emilmont | 1:4a9c72442136 | 8 | } mail_t; |
emilmont | 1:4a9c72442136 | 9 | |
emilmont | 1:4a9c72442136 | 10 | osMailQDef(mail_box, 16, mail_t); |
emilmont | 1:4a9c72442136 | 11 | osMailQId mail_box; |
emilmont | 1:4a9c72442136 | 12 | |
emilmont | 1:4a9c72442136 | 13 | void send_thread (void const *argument) { |
emilmont | 1:4a9c72442136 | 14 | uint32_t i = 0; |
emilmont | 1:4a9c72442136 | 15 | while (true) { |
emilmont | 1:4a9c72442136 | 16 | i++; // fake data update |
emilmont | 1:4a9c72442136 | 17 | mail_t *mail = (mail_t*)osMailAlloc(mail_box, osWaitForever); |
emilmont | 1:4a9c72442136 | 18 | mail->voltage = (i * 0.1) * 33; |
emilmont | 1:4a9c72442136 | 19 | mail->current = (i * 0.1) * 11; |
emilmont | 1:4a9c72442136 | 20 | mail->counter = i; |
emilmont | 1:4a9c72442136 | 21 | osMailPut(mail_box, mail); |
emilmont | 1:4a9c72442136 | 22 | osDelay(1000); |
emilmont | 1:4a9c72442136 | 23 | } |
emilmont | 1:4a9c72442136 | 24 | } |
emilmont | 1:4a9c72442136 | 25 | |
emilmont | 1:4a9c72442136 | 26 | osThreadDef(send_thread, osPriorityNormal, DEFAULT_STACK_SIZE); |
emilmont | 1:4a9c72442136 | 27 | |
emilmont | 1:4a9c72442136 | 28 | int main (void) { |
emilmont | 1:4a9c72442136 | 29 | mail_box = osMailCreate(osMailQ(mail_box), NULL); |
emilmont | 1:4a9c72442136 | 30 | osThreadCreate(osThread(send_thread), NULL); |
emilmont | 1:4a9c72442136 | 31 | |
emilmont | 1:4a9c72442136 | 32 | while (true) { |
emilmont | 1:4a9c72442136 | 33 | osEvent evt = osMailGet(mail_box, osWaitForever); |
emilmont | 1:4a9c72442136 | 34 | if (evt.status == osEventMail) { |
emilmont | 1:4a9c72442136 | 35 | mail_t *mail = (mail_t*)evt.value.p; |
emilmont | 1:4a9c72442136 | 36 | printf("\nVoltage: %.2f V\n\r" , mail->voltage); |
emilmont | 1:4a9c72442136 | 37 | printf("Current: %.2f A\n\r" , mail->current); |
emilmont | 1:4a9c72442136 | 38 | printf("Number of cycles: %u\n\r", mail->counter); |
emilmont | 1:4a9c72442136 | 39 | |
emilmont | 1:4a9c72442136 | 40 | osMailFree(mail_box, mail); |
emilmont | 1:4a9c72442136 | 41 | } |
emilmont | 1:4a9c72442136 | 42 | } |
emilmont | 1:4a9c72442136 | 43 | } |