Buzzer activation after xx minutes of up time

brcisna · August 16, 2021, 1:31am

Hello All,

–Calling all coders----
Trying to utilize the rtlduino rtl8720dn as best as i can in a drone application. Along with acting as a wifi repeater, would like for the rtlduino to activate a buzzer after 45 minutes of powered up time. In other words most drones should be done flying after at max 30 minutes uptime. This is kind of a simplistic approach to being a lost drone locater,with no user intervention. This is probably an easy coding task,for someone much smarter than I.

Thanks

xidameng · August 16, 2021, 1:47am

You may use timer to track the time elapsed since power up, example code are also in the SDK,

github.com

ambiot/ambd_sdk/blob/bec1347debbbd7a2ad2a9143af896a39e9a0b65a/project/realtek_amebaD_va0_example/example_sources/TIMER/mbed/gtimer/src/main.c#L61

    
      
              gpio_dir(&gpio_led2, PIN_OUTPUT);    // Direction: Output

              gpio_mode(&gpio_led2, PullNone);     // No pull

          

              // Initial a periodical timer

              gtimer_init(&my_timer1, TIMER2);

              gtimer_start_periodical(&my_timer1, 1000000, (void*)timer1_timeout_handler, (uint32_t)&gpio_led1);

          

              // Initial a one-shout timer and re-trigger it in while loop

              gtimer_init(&my_timer2, TIMER3);

              time2_expired = 0;

              gtimer_start_one_shout(&my_timer2, 500000, (void*)timer2_timeout_handler, NULL);

              

              while(1){

                  if (time2_expired) {

                      gpio_write(&gpio_led2, !gpio_read(&gpio_led2));

                      time2_expired = 0;

                      gtimer_start_one_shout(&my_timer2, 500000, (void*)timer2_timeout_handler, NULL);

                  }

              }

          }

brcisna · August 16, 2021, 1:53am

Hi xidemeng,

Thank You for this . Perfect. I overlooked this looking through the ambd_sdk.
I will try and learn something from this.

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Buzzer activation after xx minutes of up time

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