STM32 Serial Bootloader for Pico v1.4

Posted on Fri 26th, February 2016

• #1

Mark3072

Is there a way to use the STM32 Serial Bootloader on the Pico board? I can't use dfu-util since I want to program it from another board that only has a UART available. Is there any easy way to access Boot1 pin? Do I have to tie it to ground?
• #2

Gordon

BOOT1 is pre-grounded, so all you have to worry about is BOOT0, which is available on the BTN/B0 Jumper. If you short that out, then when you press the button and apply power (or reset) the board will go into bootloader mode.

Normally, the bootloader is a custom one that uses a USB UART, but with BOOT0 to 0, you get the ST bootloader which does DFU USB and UART. All you need to do is make sure USB isn't connected, and then it'll be available on serial.
• #3

Mark3072

Thanks Gordon, that worked great.

Post a reply
- Bold
- Italics
- Link
- Image
- List
- Quote
- code
- Preview
Formatting Help

Don't worry about formatting, just type in the text and we'll take care of making sense of it. We will auto-convert links, and if you put asterisks around words we will make them bold.

Tips:

Create headers by underlining text with ==== or ----

To *italicise* text put one asterisk each side of the word

To **bold** text put two asterisks each side of the word

Embed images by entering:
![](https://www.google.co.uk/images/srpr/logo4w.png)
That's the hard one: exclamation, square brackets and then the URL to the image in brackets.

* Create lists by starting lines with asterisks

1. Create numbered lists by starting lines with a number and a dot

> Quote text by starting lines with >

Mention another user by @username

For syntax highlighting, surround the code block with three backticks:

```
Your code goes here
```
Just like Github, a blank line must precede a code block.

If you upload more than 5 files we will display all attachments as thumbnails.

For a full reference visit the Markdown syntax.