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Cannot connect to bare f030r8t6 microcontroller w/vscode and linux


(I put links in my question but I will explain in as much detail what my problem is so that you won’t need to use the links, they are just for reference)


I am trying to follow this youtube tutorial (, but he uses coocox IDE and windows. I am using VS Code, platformio on VS Code, and Ubuntu 16.04.4 LTS. I am trying to use an stlink-v2 and a bare stm32 f030r8t6 microcontroller( My platform.ini file is:

platform = ststm32
board = f030r8t6
framework = stm32cube
upload_protocol = stlink

And I created a custom config file called f030r8t6.json which I copied and modified from: (Unable to add custom board (STM32F030 Discovery ) with OpenCM3):

"build": {
    "core": "stm32",
    "cpu": "cortex-m0", 
    "f_cpu": "48000000L",
    "extra_flags": "-DSTM32F030x8", 
    "mcu": "stm32f030r8t6",
    "variant": "stm32f030r8t6"
    "debug": {
        "default_tools": [
    "openocd_target": "stm32f0x"
 "frameworks": ["libopencm3","mbed","cmsis","spl","stm32cube"],
  "name": "STM32F030R8T6", 
  "upload": {
    "maximum_ram_size": 8192, 
    "maximum_size": 65536,
    "protocol": "stlink",
    "protocols": [
  "url": "",
  "vendor": "ST"

When I build the project everything works fine, but when I try to upload I get the following:

> Executing task: platformio run --target upload <

Processing f030r8t6 (platform: ststm32; board: f030r8t6; framework: stm32cube)
Verbose mode can be enabled via `-v, --verbose` option
SYSTEM: STM32F030R8T6 48MHz 8KB RAM (64KB Flash)
DEBUG: CURRENT(stlink) EXTERNAL(blackmagic, jlink, stlink)
Library Dependency Finder ->
Collected 0 compatible libraries
Scanning dependencies...
No dependencies
Checking size .pioenvs/f030r8t6/firmware.elf
Memory Usage ->
DATA:    [          ]   0.3% (used 28 bytes from 8192 bytes)
PROGRAM: [          ]   0.7% (used 484 bytes from 65536 bytes)
Configuring upload protocol...
AVAILABLE: blackmagic, jlink, stlink
CURRENT: upload_protocol = stlink
Uploading .pioenvs/f030r8t6/firmware.elf
GNU MCU Eclipse 64-bits Open On-Chip Debugger 0.10.0+dev-00392-gbe9ef0b0 (2018-01-12-14:56)
Licensed under GNU GPL v2
For bug reports, read
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 1000 kHz
adapter_nsrst_delay: 100
none separate
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : clock speed 950 kHz
Info : STLINK v2 JTAG v17 API v2 SWIM v4 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 3.248936
Error: init mode failed (unable to connect to the target)
in procedure 'program'
in procedure 'init' called at file "embedded:startup.tcl", line 495
in procedure 'ocd_bouncer'
** OpenOCD init failed **
shutdown command invoked

*** [upload] Error 1
=========================================================== [ERROR] Took 0.85 seconds ===========================================================
The terminal process terminated with exit code: 1

Terminal will be reused by tasks, press any key to close it

I have been stuck on this for weeks and I’m very new so I don’t know what I’m doing. I really appreciate any help!


Hmm, I am almost certain that it is the board…
I do not see and requisite capacitors on board that custom board. I strongly suspect that might be the case.
Just have a look at the discovery f030r8t6 board and see where the necessary decoupling caps are present.
and check then…

If thats not the issue, I would check the wiring from the stink to the chip.


See this

That person had the same errors at first with vscode and he solved that and published the solution