Matthias Endler
    • Create new note
    • Create a note from template
      • Sharing URL Link copied
      • /edit
      • View mode
        • Edit mode
        • View mode
        • Book mode
        • Slide mode
        Edit mode View mode Book mode Slide mode
      • Customize slides
      • Note Permission
      • Read
        • Only me
        • Signed-in users
        • Everyone
        Only me Signed-in users Everyone
      • Write
        • Only me
        • Signed-in users
        • Everyone
        Only me Signed-in users Everyone
      • Engagement control Commenting, Suggest edit, Emoji Reply
      • Invitee
      • No invitee
    • Publish Note

      Publish Note

      Everyone on the web can find and read all notes of this public team.
      Once published, notes can be searched and viewed by anyone online.
      See published notes
      Please check the box to agree to the Community Guidelines.
    • Commenting
      Permission
      Disabled Forbidden Owners Signed-in users Everyone
    • Enable
    • Permission
      • Forbidden
      • Owners
      • Signed-in users
      • Everyone
    • Suggest edit
      Permission
      Disabled Forbidden Owners Signed-in users Everyone
    • Enable
    • Permission
      • Forbidden
      • Owners
      • Signed-in users
    • Emoji Reply
    • Enable
    • Versions and GitHub Sync
    • Note settings
    • Engagement control
    • Transfer ownership
    • Delete this note
    • Save as template
    • Insert from template
    • Import from
      • Dropbox
      • Google Drive
      • Gist
      • Clipboard
    • Export to
      • Dropbox
      • Google Drive
      • Gist
    • Download
      • Markdown
      • HTML
      • Raw HTML
Menu Note settings Sharing URL Create Help
Create Create new note Create a note from template
Menu
Options
Versions and GitHub Sync Engagement control Transfer ownership Delete this note
Import from
Dropbox Google Drive Gist Clipboard
Export to
Dropbox Google Drive Gist
Download
Markdown HTML Raw HTML
Back
Sharing URL Link copied
/edit
View mode
  • Edit mode
  • View mode
  • Book mode
  • Slide mode
Edit mode View mode Book mode Slide mode
Customize slides
Note Permission
Read
Only me
  • Only me
  • Signed-in users
  • Everyone
Only me Signed-in users Everyone
Write
Only me
  • Only me
  • Signed-in users
  • Everyone
Only me Signed-in users Everyone
Engagement control Commenting, Suggest edit, Emoji Reply
Invitee
No invitee
Publish Note

Publish Note

Everyone on the web can find and read all notes of this public team.
Once published, notes can be searched and viewed by anyone online.
See published notes
Please check the box to agree to the Community Guidelines.
Engagement control
Commenting
Permission
Disabled Forbidden Owners Signed-in users Everyone
Enable
Permission
  • Forbidden
  • Owners
  • Signed-in users
  • Everyone
Suggest edit
Permission
Disabled Forbidden Owners Signed-in users Everyone
Enable
Permission
  • Forbidden
  • Owners
  • Signed-in users
Emoji Reply
Enable
Import from Dropbox Google Drive Gist Clipboard
   owned this note    owned this note      
Published Linked with GitHub
Subscribed
  • Any changes
    Be notified of any changes
  • Mention me
    Be notified of mention me
  • Unsubscribe
Subscribe
# Rust Embedded Workshop Notepad This document is for alignment during the workshop. Don't be too shy to extend the document and help others. 🦀:blush: Workshop page: https://braun-embedded.com/workshop/ Workshop package: https://braun-embedded.com/barcelona-2019-11-09.zip ## Thanks Thank you for the great workshop Hanno and Matthias! ## Open questions :construction: :tada: This is your place to add new questions and raise issues. We'll try to answer them collaboratively. ## Known issues ### Installing OpenOCD on NixOS Use the package from https://pastebin.com/wEYHhM7z . If you need it, you can use the binary cache at https://thequux.cachix.org/ to save some compile time. ### Installing OpenOCD on macOS You need a pretty recent version of OpenOCD. Homebrew is your friend. ``` brew install open-ocd --HEAD ``` ### Error: arm-none-eabi-gdb ```rust error: could not execute process `arm-none-eabi-gdb -tui -q -x openocd.gdb target/thumbv6m-none-eabi/release/examples/gpio_simple` (never executed) Caused by: No such file or directory (os error 2) ``` Please install the [GNU toolchain for your platform](https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads). For macOS, you can use [this homebrew tap](https://github.com/osx-cross/homebrew-arm). > [name=Evan Schwartz] Does anyone know which package to use on Ubuntu? > [name=Wouter Geraedts] `gdb-multiarch`, also change the path to `gdb-multiarch` in `.cargo/config`. > [name=Wouter Geraedts] > It's in the project-folder, i.e. `/minimal/.cargo/config` > ``` > [target.thumbv6m-none-eabi] > runner = "gdb-multiarch -tui -q -x openocd.gdb" > ``` ### Error: Clearing lockup after double fault If you get the following error message when you run your code: ``` lpc84x.cpu -- clearing lockup after double fault Program received signal SIGINT, Interrupt. 0xfffffffe in ?? () (gdb) cont Continuing. target not halted target lpc84x.cpu was not halted when resume was requested ``` Please push the "reset" button on the LPCXpresso. That's the black button next to the white button. :wink: After that, type `cont` or `continue` and hit `Enter`. The program should now run. > [name=nrxus] Does this have to be done every time the program is restarted? > [name=Wouter Geraedts] Mine stays in this mode and does not seem to run my code. ### Device not found After `lpc8xx-hal$ cargo run --features=845-rt --example gpio_delay` ``` ┌──examples/gpio_delay.rs─────────────────────────────────────────────────────────────────────────────────────┐ │8 #[entry] │ │9 fn main() -> ! { │ │10 // Get access to the device's peripherals. Since only one instance of this │ │11 // struct can exist, the call to `take` returns an `Option<Peripherals>`. │ │12 // If we tried to call the method a second time, it would return `None`, but │ │13 // we're only calling it the one time here, so we can safely `unwrap` the │ │14 // `Option` without causing a panic. │ │15 let p = Peripherals::take().unwrap(); │ │16 │ │17 // Initialize the APIs of the peripherals we need. │ │18 let swm = p.SWM.split(); │ │19 let mut delay = Delay::new(p.SYST); │ │20 #[cfg(feature = "82x")] │ │21 let gpio = p.GPIO; // GPIO is initialized by default on LPC82x. │ │22 #[cfg(feature = "845")] │ └─────────────────────────────────────────────────────────────────────────────────────────────────────────────┘ exec No process In: L?? PC: ?? Info : only one transport option; autoselect 'swd' Warn : Transport "swd" was already selected target/openocd.cfg:8: Error: Can't find target/lpc84x.cfg in procedure 'script' at file "embedded:startup.tcl", line 60 at file "target/openocd.cfg", line 8 openocd.gdb:1: Error in sourced command file: Remote communication error. Target disconnected.: Connection reset by peer. (gdb) ``` Now what? > [name=Wouter Geraedts] ~~You probably are running Ubuntu. The scripts provided with the Ubuntu openocd do not have the specific `lpc84x.cfg` file. > Change the file to `lpc8xx.cfg` in `openocd.cfg`. I.e.~~ > ``` > source [find target/lpc8xx.cfg] > ``` > > Ubuntu repository OpenOCD is outdated, compile OpenOCD yourself from [this mirror](https://github.com/ntfreak/openocd). > Compile openocd with `./configure --enable-cmsis-dap`. ### Can't find target/openocd.cfg > [name=gakonst] (MacOS). > There is an openocd.cfg generated under `./target/thumbv6m-none-eabi/release/build/lpc8xx-hal-e9e3756869db2498/out/openocd.cfg`, copying it to `./target/openocd.cfg` doesn't help. > [name=polly] > Happens on arch for me > [This](https://elinux.org/OpenOCD_Troubleshooting:_Can%27t_Find_File.cfg#Can.27t_Find_openocd.cfg) might be relevant When running `cargo run --features=845-rt --example gpio_delay` ``` Reading symbols from target/thumbv6m-none-eabi/debug/examples/gpio_delay... Open On-Chip Debugger 0.10.0+dev-00954-gded679902 (2019-11-05-14:28) Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html embedded:startup.tcl:26: Error: Can't find target/openocd.cfg in procedure 'script' at file "embedded:startup.tcl", line 26 openocd.gdb:1: Error in sourced command file: Remote communication error. Target disconnected.: Connection reset by peer. (gdb) ``` **SOLUTION: Revert to git hash `969b67d39a45895783b8e0662a272e8d3ce27d42`, at the moment of writing this HEAD does not work (due to last minute changes before the talk)** ;) I'm running Debian 9 and the OCD version from apt was 0.9. I uninstalled it and downloaded it for that website. Then I have version 0.10. See question below about where to extract the tgz file? > [name=gakonst] `brew install openocd` gave 0.10.0, still failing ### Compilation failure (Solved) When running `cargo run --features=845-rt --example gpio_delay` > rustc 1.32.0 (9fda7c223 2019-01-16) ``` error[E0658]: renaming imports with `_` is unstable (see issue #48216) --> src/lib.rs:145:13 | 145 | pub use crate::sleep::Sleep as _; | ^^^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0658`. error: Could not compile `lpc8xx-hal`. ``` **SOLUTION**: Update rust to latest stable version: rustc 1.39.0 (4560ea788 2019-11-04) > rustup update ### warning: unrecognized item "timeout" in "qSupported" response Full error: ``` warning: unrecognized item "timeout" in "qSupported" response openocd.gdb:1: Error in sourced command file: Remote communication error. Target disconnected.: Connection reset by peer. ``` **Solution**: You're probably using stable openocd. Download the latest git version. latest git version -- thequux > [name=Evan Schwartz] I have this version and I'm still seeing the error: `xPack OpenOCD, 64-bit Open On-Chip Debugger 0.10.0+dev (2019-07-17-11:25)` > [name=gakonst] I have `v0.10.0-esp32-20191008` from [here](https://github.com/espressif/openocd-esp32/releases), same problem. > [name=flomonster] I might have a solution. After using the latest git version of openocd. Clean your project `cargo clean` then try to run it. (Let me know if it works for you) > [name=Evan Schwartz] I tried that and still got `openocd.gdb:1: Error in sourced command file:` (this might be the [Unknown Error](#unknown-error) below) > You need somehow to make OpenOCD view these files: https://github.com/espressif/openocd-esp32/tree/master/tcl/target. > [name=nrxus] The `cargo clean` command worked for me > [name=jap] `cargo clean` did not work for me, but unplugging the device did... > [name=Evan Schwartz] Neither `cargo clean` nor unplugging the device worked for me :crying_cat_face: > [name=gakonst] this is literally just the system being unable to find the config files, the error in sourced command file is the openocd.cfg file trying to import the file under interfaces/ :/ :sadface: ### Unknown error > [name=Doc] This means your board is not detected > In my case it was a bad USB cable !!!!!! <Insert angry face here> ``` openocd.gdb:1: Error in sourced command file: Remote communication error. Target disconnected.: Connection reset by peer. ``` > [name=pizzamig] You can re-run `cargo run` or type manually the commands contained in the openocd.gdb file: ``` target remote | openocd -f target/openocd.cfg load continue ``` Running `target remote` asks me to specify which device I'm connecting to, and even then, `openocd` run with the cfg file does not have the proper interface available ``` Error: The specified debug interface was not found (cmsis-dap) The following debug interfaces are available: 1: ftdi 2: usb_blaster 3: ft232r 4: jlink 5: vsllink 6: ulink 7: hla 8: osbdm 9: opendous 10: aice 11: xds110 ``` >[name=pizzamig] openocd has to be compiled with cmsis-dap enabled. An additional dependency is required, libhidapi, and `--enable-cmsis-dap` during configure ``` target/lpc8xx.cfg:10: Error: Can't find target/lpc1xxx.cfg in procedure 'script' at file "embedded:startup.tcl", line 26 at file "./openocd_82x.cfg", line 6 ``` >[name=pizzamig]Are you using `--features=845-rt`? `openocd_82x.cfg` is the configuration for a different board ### OCD setup I downloaded OCD from https://github.com/xpack-dev-tools/openocd-xpack/releases/ an untared it to some dir `xPacks/openocd/0.10.0-13/`. How is this supposed to be used because just having it unpacked will do nothing with it and the self check command `cargo run --features=845-rt --example gpio_delay` will no know about it. How are the executable and the config files found? > [name=Evan Schwartz] I just manually added that folder to the path (`export PATH=/path/to/xPacks/openocd/0.10.0-13/:$PATH`) > [name=pizzamig] openocd is invoked by gdb via the command `target remote | openocd -f target/openocd.cfg` (the first line of openocd.gdb) but it has to be reachable by your shell. Alternatively, you can modify the openocd.gdb file using an absolute pathname for openocd ### udev: configured OK? (Debian) How to check that it is set up correctly? Command: ... Expected response: .... ### LED not working Level of gpio and LED is counter intuitive for non-embedded developers Solution: set_high() -> led off set_low() -> led on > [name=Wouter Geraedts] Try running it in release mode with `cargo run --release`. This was what worked for me. ### Did someone got to interact with Touch capacitor? Trying to read using `.read().istouch().bit_is_set()` but I guess there is some setup to do?

Import from clipboard

Advanced permission required

Your current role can only read. Ask the system administrator to acquire write and comment permission.

This team is disabled

Sorry, this team is disabled. You can't edit this note.

This note is locked

Sorry, only owner can edit this note.

Reach the limit

Sorry, you've reached the max length this note can be.
Please reduce the content or divide it to more notes, thank you!

Import from Gist

Import from Snippet

or

Export to Snippet

Are you sure?

Do you really want to delete this note?
All users will lose their connection.

Create a note from template

Create a note from template

Oops...
This template is not available.
Upgrade
All
  • All
  • Team
No template found.

Create custom template

Upgrade

Delete template

Do you really want to delete this template?
Turn this template into a regular note and keep its content, versions, and comments.

This page need refresh

You have an incompatible client version.
Refresh to update.
New version available!
See releases notes here
Refresh to enjoy new features.
Your user state has changed.
Refresh to load new user state.

Sign in

Forgot password

or

By clicking below, you agree to our terms of service.

Sign in via Facebook Sign in via Twitter Sign in via GitHub Sign in via Dropbox Sign in with Wallet
Wallet ( )
Connect another wallet

New to HackMD? Sign up

Help

  • English
  • 中文
  • Français
  • Deutsch
  • 日本語
  • Español
  • Català
  • Ελληνικά
  • Português
  • italiano
  • Türkçe
  • Русский
  • Nederlands
  • hrvatski jezik
  • język polski
  • Українська
  • हिन्दी
  • svenska
  • Esperanto
  • dansk

Documents

Help & Tutorial

How to use Book mode

How to use Slide mode

API Docs

Edit in VSCode

Install browser extension

Get in Touch

Feedback

Discord

Send us email

Resources

Releases

Pricing

Blog

Policy

Terms

Privacy

Cheatsheet

Syntax Example Reference
# Header Header 基本排版
- Unordered List
  • Unordered List
1. Ordered List
  1. Ordered List
- [ ] Todo List
  • Todo List
> Blockquote
Blockquote
**Bold font** Bold font
*Italics font* Italics font
~~Strikethrough~~ Strikethrough
19^th^ 19th
H~2~O H2O
++Inserted text++ Inserted text
==Marked text== Marked text
[link text](https:// "title") Link
![image alt](https:// "title") Image
`Code` Code 在筆記中貼入程式碼
```javascript
var i = 0;
```
var i = 0;
:smile: :smile: Emoji list
{%youtube youtube_id %} Externals
$L^aT_eX$ LaTeX
:::info
This is a alert area.
:::

This is a alert area.

Versions and GitHub Sync
Upgrade to Prime Plan

  • Edit version name
  • Delete

revision author avatar     named on  

More Less

No updates to save
Compare with
    Choose a version
    No search result
    Version not found
Sign in to link this note to GitHub
Learn more
This note is not linked with GitHub
 

Feedback

Submission failed, please try again

Thanks for your support.

On a scale of 0-10, how likely is it that you would recommend HackMD to your friends, family or business associates?

Please give us some advice and help us improve HackMD.

 

Thanks for your feedback

Remove version name

Do you want to remove this version name and description?

Transfer ownership

Transfer to
    Warning: is a public team. If you transfer note to this team, everyone on the web can find and read this note.

      Link with GitHub

      Please authorize HackMD on GitHub
      • Please sign in to GitHub and install the HackMD app on your GitHub repo.
      • HackMD links with GitHub through a GitHub App. You can choose which repo to install our App.
      Learn more  Sign in to GitHub

      Push the note to GitHub Push to GitHub Pull a file from GitHub

        Authorize again
       

      Choose which file to push to

      Select repo
      Refresh Authorize more repos
      Select branch
      Select file
      Select branch
      Choose version(s) to push
      • Save a new version and push
      • Choose from existing versions
      Include title and tags
      Available push count

      Upgrade

      Pull from GitHub

       
      File from GitHub
      File from HackMD

      GitHub Link Settings

      File linked

      Linked by
      File path
      Last synced branch
      Available push count

      Upgrade

      Danger Zone

      Unlink
      You will no longer receive notification when GitHub file changes after unlink.

      Syncing

      Push failed

      Push successfully