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lukedukeee
Visitor II
November 3, 2023
Question

STM32L053 LCD - SPI issue?

  • November 3, 2023
  • 1 reply
  • 689 views

Hi all!

 

I am having a bit of an issue with a custom LCD. I can get several segments to work except a few, which I discovered are used by SPI2 for the bootloader. I have tied BOOT0 to GND and also checked PB15 and PB14 for instance with a scope, nothing going on there. Is there anything I need to change to use PBx Pins to work with the LCD controller?

 

 

Thanks in advance!

 

Luke

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    1 reply

    Peter BENSCH
    Peter BENSCH
    ST Technical Moderator
    November 3, 2023

    Welcome @lukedukeee to the community!

    PB15 and PB14 are also used by the bootloader, but only when the bootloader is active. In normal operation, the two pins are available without restriction.

    Please check your programme to see whether you have activated one of the alternative functions, e.g. SPI2 or an RTC function, which you are perhaps not yet using?

    Regards
    /Peter

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