forked from M-Labs/thermostat
should result in less -vendor pkgs in the nix store |
||
---|---|---|
.cargo | ||
nix | ||
src | ||
.gitignore | ||
Cargo.lock | ||
Cargo.toml | ||
LICENSE | ||
README.md | ||
build.rs | ||
default.nix | ||
memory.x | ||
openocd.gdb | ||
release.nix | ||
shell.nix |
README.md
Synopsis
Exposes readings from an ADC pin (currently: PA3) of the board via a TCP service on the Ethernet port.
Network Protocol
Sensor readings produce lines of key=value
pairs, joined by ,
,
terminated by "\r\n"
.
t=21000,pa3=685
t=22000,pa3=684
t=23000,pa3=681
t=24000,pa3=696
t=25000,pa3=673
t=26000,pa3=689
t=27000,pa3=657
t=28000,pa3=654
t=29000,pa3=652
t=30000,pa3=662
t=31000,pa3=663
Key | Value | Unit |
---|---|---|
t | Time | ms |
pa3 | ADC reading | mV |
LEDs
Colors indicate what the MCU is occupied with.
Color | Indication |
---|---|
Green | WFI (idle) |
Blue | Network poll |
Red | Message broadcast |
Crate features
-
semihosting
enables log output via the cortex-m-semihosting crate. Use only in development! MCU will hang when no OpenOCD is running. -
generate-hwaddr
generates an Ethernet MAC address by hashing the unique device ID from flash memory.
Instructions
Build the firmware with default.nix
nix-build
- This uses cargo-vendor to bundle dependencies, so that unstable versions from git can be used.
- Run
result/bin/flash-adc2tcp
to flash a devboard with OpenOCD and quit.
Development environment with shell.nix
nix-shell
- Spawning
openocd
, the devboard should be connected already. - Instructions (
cargo run --release
) are printed.