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SGoel.2
Visitor II
September 14, 2022
Solved

Hello all Hope You are doing well !! I have an issue with Nucleo board g071rb.

  • September 14, 2022
  • 3 replies
  • 2366 views

I am trying to blink two led's one is connected to pin 5 (green led) and second is red led and for blinking i set it to pin 6 but the issue is that i am not able to blink red led(LD1) and the green led(LD4) is properly working .

Can anyone help me regarding this..

    This topic has been closed for replies.
    Best answer by Peter BENSCH

    First of all, a few hints:

    If you define GPIOs with STM32CubeMX or STM32CubeIDE as GPIO_Input or GPIO_Output, names are also further defined for them, which can be used alternatively. Example:

    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, ***);

    is in your case equivalent to

    HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, ***);

    Your notation is not a mistake, but the latter should be easier to understand.

    If you are working with FreeRTOS, you should first familiarise yourself with how it works. For tasks in FreeRTOS, for example, HAL_Delay() should not be used, but osDelay(), since osDelay does not block and is handled by timers.

    Finally: are you sure that your LED still works and is connected correctly, i.e. with series resistance (depending on forward current and LED colour) of 62 ohms...1.3k?

    Regards

    /Peter

    3 replies

    P
    Peter BENSCH
    Technical Moderator
    September 14, 2022

    You cannot control LD1 because it is a bicolor LED that is controlled by the embedded ST-LINK. The only user-controllable LED on the NUCLEO-G0B1RB is LD4.

    Does it answer your question?

    Regards

    /Peter

    S
    SGoel.2Author
    Visitor II
    September 15, 2022

    @Peter BENSCH​ Thank you for your help, I want to ask another thing that if we connect external led to nucleo board and want to blink it that's possible or not?? Why we can blink it ??

    P
    Peter BENSCH
    Technical Moderator
    September 15, 2022
    Yes, of course you can connect an external LED to one of the unused pins. Please remember to connect a series resistor to limit the LED current.
    Also, please remember that the output current of the GPIO is limited, and that for white, blue and blueish-green LEDs the output voltage is a little too close to the forward voltage. Red and yellow LEDs, however, can usually be operated well on STM32 with 3.3V.
    Regards
    /Peter
    S
    SGoel.2Author
    Visitor II
    September 15, 2022

    @Peter BENSCH​  Thank you sir for your help & Kind Information.

    S
    SGoel.2Author
    Visitor II
    September 15, 2022

    @Peter BENSCH​  Can you please tell me one thing that how can I define pin for external led, I have connected its (+) to Pin D7 externally and (-) at ground and define pin D7 as shown in figure but it is nt working still only green led is working only. I am using RTOS here and defined two tasks StartBlynk01 & StartBlynk02 with respect to LD4 and Red Led.0693W00000SvRwmQAF.png0693W00000SvRwSQAV.png0693W00000SvRwNQAV.png

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