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
- Committer:
- emilmont
- Date:
- 2012-07-13
- Revision:
- 1:4a9c72442136
- Parent:
- 0:9546ebd01d95
- Child:
- 2:e9f14106068c
File content as of revision 1:4a9c72442136:
#include "mbed.h" #include "cmsis_os.h" typedef struct { float voltage; /* AD result of measured voltage */ float current; /* AD result of measured current */ uint32_t counter; /* A counter value */ } mail_t; osMailQDef(mail_box, 16, mail_t); osMailQId mail_box; void send_thread (void const *argument) { uint32_t i = 0; while (true) { i++; // fake data update mail_t *mail = (mail_t*)osMailAlloc(mail_box, osWaitForever); mail->voltage = (i * 0.1) * 33; mail->current = (i * 0.1) * 11; mail->counter = i; osMailPut(mail_box, mail); osDelay(1000); } } osThreadDef(send_thread, osPriorityNormal, DEFAULT_STACK_SIZE); int main (void) { mail_box = osMailCreate(osMailQ(mail_box), NULL); osThreadCreate(osThread(send_thread), NULL); while (true) { osEvent evt = osMailGet(mail_box, osWaitForever); if (evt.status == osEventMail) { mail_t *mail = (mail_t*)evt.value.p; printf("\nVoltage: %.2f V\n\r" , mail->voltage); printf("Current: %.2f A\n\r" , mail->current); printf("Number of cycles: %u\n\r", mail->counter); osMailFree(mail_box, mail); } } }