Firmware for the Sinara 8451 Thermostat

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README.md

Firmware for the Sinara 8451 Thermostat

Building

Debian-based systems (tested on Ubuntu 19.10)

install git, clone this repository
install rustup

rustup toolchain install nightly
rustup update
rustup target add thumbv7em-none-eabihf --toolchain nightly
rustup default nightly
cargo build --release

The resulting ELF file will be located under target/thumbv7em-none-eabihf/release/thermostat

Network

Connecting

Ethernet, IP: 192.168.1.26/24

Use netcat to connect to port 23/tcp (telnet)

nc -vv 192.168.1.26 23

telnet clients send binary data after connect. Enter \n once to invalidate the first line of input.

Reading ADC input

Set report mode to on for a continuous stream of input data.

The scope of this setting is per TCP session.

Commands

Syntax	Function
`report`	Show current input
`report mode`	Show current report mode
`report mode <off/on>`	Set report mode
`pwm`	Show current PWM settings
`pwm <0/1> max_i_pos <ratio>`	Set PWM duty cycle for max_i_pos to ampere
`pwm <0/1> max_i_neg <ratio>`	Set PWM duty cycle for max_i_neg to ampere
`pwm <0/1> max_v <ratio>`	Set PWM duty cycle for max_v to volt
`pwm <0/1> <volts>`	Disengage PID, set i_set DAC to ampere
`pwm <0/1> pid`	Set PWM to be controlled by PID
`center <0/1> <volts>`	Set the MAX1968 0A-centerpoint to volts
`center <0/1> vref`	Set the MAX1968 0A-centerpoint to measure from VREF
`pid`	Show PID configuration
`pid <0/1> target <value>`	Set the PID controller target
`pid <0/1> kp <value>`	Set proportional gain
`pid <0/1> ki <value>`	Set integral gain
`pid <0/1> kd <value>`	Set differential gain
`pid <0/1> output_min <value>`	Set mininum output
`pid <0/1> output_max <value>`	Set maximum output
`pid <0/1> integral_min <value>`	Set integral lower bound
`pid <0/1> integral_max <value>`	Set integral upper bound
`s-h`	Show Steinhart-Hart equation parameters
`s-h <0/1> <t0/b/r0> <value>`	Set Steinhart-Hart parameter for a channel
`postfilter`	Show postfilter settings
`postfilter <0/1> off`	Disable postfilter
`postfilter <0/1> rate <rate>`	Set postfilter output data rate
`load`	Restore configuration from EEPROM
`save`	Save configuration to EEPROM
`reset`	Reset the device
`ipv4 <X.X.X.X>`	Configure IPv4 address

USB

The firmware includes experimental support for acting as a USB-Serial peripheral. Debug logging will be sent there by default (unless build with logging via semihosting.)

Caveat: This logging does not flush its output. Doing so would hang indefinitely if the output is not read by the USB host. Therefore output will be truncated once buffers are full.