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An alarm clock with environment stats in pure bare metal embedded rust

License: MIT License

GDB 0.26% Rust 76.45% OpenSCAD 23.11% RPC 0.18%

rust embedded clock alarm alarm-clock diy sensors temperature humidity pressure

rusty-clock's Introduction

Rusty clock

An alarm clock in pure bare metal embedded rust (no OS). It features pressure, temperature, humidity, monophonic alarm on a e-paper display. The 5 programmable alarms can ring one time (and never repeat) or every week day that you want (for example only Monday and Thursday).

You can also look at the gallery.

Hardware

The hardware used in this project is

a blue pill board featuring a STM32F103C8 microcontroller (20KiB RAM, 64 KiB flash, ARM Cortex M3 @72MHz);
a 2.9" WaveShare e-paper display (296x128 black or white pixels);
a BME280 sensor for temperature, humidity and pressure on a I2C compatible PCB (VIN, GND, SCL and SDA pins);
a 2" speaker driven by PWM;
4 16mm normally open push buttons (cancel, previous, next, OK);
a 3D printed case;
USB power plug;
micro USB cable;
a CR20xx coin battery (optional);
wires (I use single core wires) and soldering set;
4 2mm wood screws.

You also need a ST-Link v2 to flash and debug.

Everything can be purchased on Aliexpress. Budget is around US $40 without the 3D printed case and soldering set.

Wiring

Everything is plugged directly to the blue pill board.

E-paper display to blue pill board:

BUSY -> A10
RST -> A9
DC -> A8
CS -> B12
CLK -> B13
DIN -> B15
GND -> G
VCC -> 3.3

BME280 to blue pill board:

VIN -> 3.3
GND -> G
SCL -> B6
SDA -> B7

Buttons are connected to the blue pill board between G and

A6 for cancel
A7 for previous
B0 for next
B1 for OK

The speaker is connected to the blue pill board between A0 and A1.

Coin battery to blue pill board:

(-) -> G
(+) -> VB

Plug the micro USB connector of the blue pill board to a USB power supply (or a computer).

Compiling and flashing

For compiling and flashing, please refer to the blue pill quickstart.

Basically:

curl https://sh.rustup.rs -sSf | sh
rustup target add thumbv7m-none-eabi
sudo apt-get install gdb-arm-none-eabi openocd
cd rusty-clock
# connect ST-Link v2 to the blue pill and the computer
# openocd in another terminal
cargo run --release

rusty-clock's People

Contributors

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rusty-clock's Issues

Implement snooze

Add charts of the environment data (pressure, temperature and humidity)

Case improvements

button holes must be 16mm not 17
enlarge the SWD pocket
chamfer around the display pocket
lower the board
enlarge a bit the display screw holes
add a back
add coin battery holder
shorten the back screw hole to have the back a bit inside

Returns to main screen after 10 min of inactivity

Save and restore alarms in backup registers

Add a gallery

Add a gallery:

first POC on breadboard
photos of the v1
photos of the menu and alarm edition
3D rendering of the box v2

Add a detailled build instructions

take photos and import them
add a photo of the inside of the clock v2
write the detailed build instructions

Improve the cancel button behavior

Improve UI by putting in reverse video the editing part.

Selecting the alarm song

Make a new box

Make a new box with:

speaker
accessible debugger without removing the backpanel
AAA battery holder (just in case)

TODO:

box
back panel
printing everything

Questions while trying to use epd-waveshare instead of il3820

I tried to use my epd_waveshare crate for this app instead of the il3820 which is basically just a slightly different driver for the same display. (the epd-crate also includes 2 other epds).

The biggest problem I have right now is that ui:view always creates a new buffer/display_ribbon_left. Is there a reason for this? (https://github.com/TeXitoi/rusty-clock/blob/master/portable/src/ui/mod.rs#L152)

Support schematic circuit diagram

blackang3r: Good. Is there a schematic circuit diagram?

TeXitoi : Not yet. You can find the used pin in the source code.
That's planned. You can open an issue to know when it's done, and it will motivate me to do it fast ;-)

Look forward to your schematic circuit diagram. 😆

Improve sound

Include a polyphonic alarm using a pwm DAC.

POC here: https://github.com/TeXitoi/softsynth/tree/master/bluepill-player

Add a way to play the different songs

Compile on stable

This will require to switch to RTFM v0.4

README.md

Hi

Nice work with the rusty-clock!

Is there a reason the README.md reads:

Compiling and flashing

For compiling and flashing, please refer to the blue pill quickstart. Note that a nightly toolchain is required.

It should compile under stable (if the application itself does not use some nightly feature).

Best regards
Per

Program the flash memory

Just a quick question, because I have troubles in a project of my own. How do you tell openocd to write your program into the flash memory ?
As I understand, the load instruction in openocd.gdb only load the program in RAM.
Thank you ! 😄

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