main.cpp

00001 #include "mbed.h"
00002 #include "cmsis_os.h"
00003 
00004 typedef struct {
00005   float    voltage; /* AD result of measured voltage */
00006   float    current; /* AD result of measured current */
00007   uint32_t counter; /* A counter value               */
00008 } mail_t;
00009 
00010 osMailQDef(mail_box, 16, mail_t);
00011 osMailQId  mail_box;
00012 
00013 void send_thread (void const *args) {
00014     uint32_t i = 0;
00015     while (true) {
00016         i++; // fake data update
00017         mail_t *mail = (mail_t*)osMailAlloc(mail_box, osWaitForever);
00018         mail->voltage = (i * 0.1) * 33; 
00019         mail->current = (i * 0.1) * 11;
00020         mail->counter = i;
00021         osMailPut(mail_box, mail);
00022         osDelay(1000);
00023     }
00024 }
00025 
00026 osThreadDef(send_thread, osPriorityNormal, DEFAULT_STACK_SIZE);
00027 
00028 int main (void) {
00029     mail_box = osMailCreate(osMailQ(mail_box), NULL);
00030     osThreadCreate(osThread(send_thread), NULL);
00031     
00032     while (true) {
00033         osEvent evt = osMailGet(mail_box, osWaitForever);
00034         if (evt.status == osEventMail) {
00035             mail_t *mail = (mail_t*)evt.value.p;
00036             printf("\nVoltage: %.2f V\n\r"   , mail->voltage);
00037             printf("Current: %.2f A\n\r"     , mail->current);
00038             printf("Number of cycles: %u\n\r", mail->counter);
00039             
00040             osMailFree(mail_box, mail);
00041         }
00042     }
00043 }