https://github.com/texitoi/rusty-clock
An alarm clock with environment stats in pure bare metal embedded rust
https://github.com/texitoi/rusty-clock
alarm alarm-clock clock diy embedded humidity pressure rust sensors temperature
Last synced: 11 months ago
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An alarm clock with environment stats in pure bare metal embedded rust
- Host: GitHub
- URL: https://github.com/texitoi/rusty-clock
- Owner: TeXitoi
- License: mit
- Created: 2018-08-16T15:53:48.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2024-04-28T13:23:40.000Z (almost 2 years ago)
- Last Synced: 2025-03-17T11:58:44.249Z (12 months ago)
- Topics: alarm, alarm-clock, clock, diy, embedded, humidity, pressure, rust, sensors, temperature
- Language: Rust
- Homepage:
- Size: 10.6 MB
- Stars: 346
- Watchers: 14
- Forks: 26
- Open Issues: 9
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Rusty clock [](https://travis-ci.org/TeXitoi/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](gallery.md).
## Hardware
The hardware used in this project is
- a [blue pill board](https://wiki.stm32duino.com/index.php?title=Blue_Pill) featuring a STM32F103C8 microcontroller (20KiB RAM, 64 KiB flash, ARM Cortex M3 @72MHz);
- a [2.9" WaveShare e-paper display](https://www.waveshare.com/wiki/2.9inch_e-Paper_Module) (296x128 black or white pixels);
- a [BME280 sensor](https://www.bosch-sensortec.com/bst/products/all_products/bme280) for temperature, humidity and pressure on a [I2C compatible PCB (VIN, GND, SCL and SDA pins)](https://www.aliexpress.com/item/a/32847825408.html);
- a [2" speaker](https://www.aliexpress.com/item/a/32728713916.html) driven by PWM;
- 4 [16mm normally open push buttons](https://www.aliexpress.com/item/a/32867071630.html) (cancel, previous, next, OK);
- a [3D printed case](cad/);
- USB power plug;
- micro USB cable;
- a CR20xx coin battery (optional);
- wires (I use [single core wires](https://www.aliexpress.com/item/a/32832816460.html)) and soldering set;
- 4 2mm wood screws.
You also need a [ST-Link v2](https://www.aliexpress.com/item/a/32719963657.html) to flash and debug.
Everything can be purchased on [Aliexpress](https://my.aliexpress.com/wishlist/shared.htm?groupId=100000007706754). 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](https://github.com/TeXitoi/blue-pill-quickstart/blob/master/README.md).
Basically:
```shell
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
```