tmk_core/tool/mbed/mbed-sdk/libraries/tests/rtos/cmsis/mail/main.cpp

   1 #include "mbed.h"
   2 #include "cmsis_os.h"
   3
   4 typedef struct {
   5   float    voltage; /* AD result of measured voltage */
   6   float    current; /* AD result of measured current */
   7   uint32_t counter; /* A counter value               */
   8 } mail_t;
   9
  10 osMailQDef(mail_box, 16, mail_t);
  11 osMailQId  mail_box;
  12
  13 void send_thread (void const *argument) {
  14     uint32_t i = 0;
  15     while (true) {
  16         i++; // fake data update
  17         mail_t *mail = (mail_t*)osMailAlloc(mail_box, osWaitForever);
  18         mail->voltage = (i * 0.1) * 33;
  19         mail->current = (i * 0.1) * 11;
  20         mail->counter = i;
  21         osMailPut(mail_box, mail);
  22         osDelay(1000);
  23     }
  24 }
  25
  26 osThreadDef(send_thread, osPriorityNormal, DEFAULT_STACK_SIZE);
  27
  28 int main (void) {
  29     mail_box = osMailCreate(osMailQ(mail_box), NULL);
  30     osThreadCreate(osThread(send_thread), NULL);
  31
  32     while (true) {
  33         osEvent evt = osMailGet(mail_box, osWaitForever);
  34         if (evt.status == osEventMail) {
  35             mail_t *mail = (mail_t*)evt.value.p;
  36             printf("\nVoltage: %.2f V\n\r"   , mail->voltage);
  37             printf("Current: %.2f A\n\r"     , mail->current);
  38             printf("Number of cycles: %u\n\r", mail->counter);
  39
  40             osMailFree(mail_box, mail);
  41         }
  42     }
  43 }