How to control buzzer alarm and device power press key by RTC in LSI mode

[Md Mubdiul Hasan]

Posted on September 21, 2016 at 02:43

Hi dear all,

I am using STM32F070RB-T6  to control a buzzer for 10 sec beeps and a power ON press key in my circuit.

How to use RTC, DMA here in LSI mode?

Kindly share code and disscuss it.

Thanks in advance.

[Nesrine M_O]

Posted on September 21, 2016 at 10:54

Hi hasan.md_mubdiul,

I suggest you to have a look to the RTC example under the STM32F0 cube firmware package:STM32Cube_FW_F0_V1.6.0\Projects\STM32F070RB-Nucleo\Examples\RTC\RTC_AlarmThis example guides you through the different configuration steps by mean of HAL API to ensure Alarm configuration and generation using the RTC peripheral.-Syrine-

[Md Mubdiul Hasan]

Posted on September 22, 2016 at 10:05 Dear Sir,

I went through this project file.

My application is different(may be for my ignorance).

At the beggining I am trying to press a power button, at the same 2 pin will be turn on alternatively, then buzzer and  7segment will reset.

I need to understand state machine, timer implementation, periferal clock distribution and other things.

Take a look this code,

  void EXTI0_IRQHandler(void)

       {          if(EXTI_GetITStatus(USER_BUTTON_EXTI_LINE) != RESET)          else         (db_count = 16)                EXTI->PR = 0x00000200;             else               EXTI_ClearITPendingBit(EXTI_Line9                         void main()            {             do            {              if(PORTC.PC5 == 0)   //If the KEY_SW1 switch is pressed              {                 Delay_ms(100);    //Switch Debounce                 if(PORTC.PC5 == 0)//If the switch is still pressed                 {                                                          GPIO_ToggleBits ( GPIOB,TRIAC_CON1_Pin);                        PORTD.PD2 = 1; //LED7 ON                        LED7Toggle = 4000;  //4 seconds                        Delay_ms(1000); //1 Second Delay                        PORTD.PD2 = 0; //LED OFF                  }

           } else {    

                 PORTC.PC5 == 0; //If the KEY_SW1 switch is pressed                                    /* set led on */                 GPIO_SetBits( TRIAC_CON2_Pin);                 PORTD.PD2 = 1; //LED7 ON                 LED7Toggle = 4000;  //4 seconds                 Delay_ms(1000); //1 Second Delay                 PORTD.PD2 = 0; //LED OFF                                 }                                           }                      }while(1);                     }