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MatheusMarkies
MatheusMarkies
Associate III
June 24, 2024
Solved

I can't connect my Nucleo to my STM32L0 board

Well, I'm new to the STM32. I'm developing vibration and temperature sensors, which used to be equipped with an atmega.
With the new demand for processing I decided to upgrade by putting an STM32L0 in place of the old controller.
The problem is that now I can't use my CUBE Programmer to connect to my board via Nucleo's STM Link.
An error message appears whenever I click Connect, and my Nucleo board flashes red.
I think I may have made a connection or PCB design error.

Information:
My system has 1 accelerometer 1 temperature sensor 1 Lora radio 1 battery sensor and a 3v3 regulator.
The clock has been set to 25KHz by means of an Oscillator Crystal.
and the BOOT0 pin is not connected to anything other than the pull-down resistor.

This topic has been closed for replies.
Tesla DeLorean
Tesla DeLoreanBest answer
Guru
June 24, 2024

Ok, so now it sees the ST-LINK

The complaint is the target is not viable.

So power and connections become critical. Schematic looks reasonable. Check components and orientation. Common grounds. Check state/level of NRST signal

The target will need both analogue and digital supplies connected.

SWCLK, SWDIO, GND

The CM0(+) will not support PB3/SWO

Disconnect the local target on the NUCLEO-F103RB board, pair of jumpers.

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6 replies

Tesla DeLorean
Tesla DeLorean
Guru
June 24, 2024

The error is that it can't even find the ST-LINK / NUCLEO, so perhaps a short or power issue.

I'd assume you've used the NUCLEO previously? Which model of NUCLEO?

Does it show up in Device Manager?

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    MatheusMarkies
    MatheusMarkiesAuthor
    Associate III
    June 24, 2024

    I've used NUCLEO a few times, and it works perfectly. I made a new board soldering only the STM32 system and now my NUCLEO is showing up in the device manager and also in the Programmer.
    However, I can't connect to it.

     

    Andrew Neil
    Andrew Neil
    Super User
    June 24, 2024
    @MatheusMarkies wrote:

    I made a new board soldering only the STM32 system and now my NUCLEO is showing up in the device manager and also in the Programmer.
    However, I can't connect to it.

    So you're using the ST-Link part of your Nucleo board to program your own custom board?

    Are you sure you've set all the links correctly for that?

    Does the Nucleo's ST-Link still work with the Nucleo Target?

     

    A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
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