Command Line Interface

This section describes the command line interface located on the UART interface. The command line interface is implemented using a “shellmatta” shell module <https://git.shimatta.net/shimatta/shellmatta>

Hardware Settings

General Settings

The UART is configured for the following settings:

  • 115200 Baud

  • 1 Stopbit

  • No parity

  • 8 data bits

Setup in Debug Build

If the Reflow controller is build in debug mode, the UART is located on the internal spring contact connector, which is also used for the SWD interface.

Setup in Release Build

In case of a release build, the UART is externally accessible on the DIGIO Header. The voltage level is 3.3 Volt LVCMOS. The inputs are ESD protected. Overvoltage is interally clamped and may dammage the clamping diodes!

  • DIGIO2: Reflow Controller’s TX

  • DIGIO3: Reflow Controller’s RX

Shell Commands

The following shell commands are available.

safety-flags

The safety-flags (flags) command displays the status of all safety flags and analog monitors. See: Safety Flags

calibrate

The calibrate (cal) command is used to calibrate the Analog Frontend, in order to ensure correct resistance measurement. Calibration is most likely not necessary! See the Calibration page.

The command will guide you through the calibration process and will ask for two reference resistors with 1000 Ohm and 2000 Ohm values. Calibration can be aborted using CTRL + C.

hang

The hang command hangs the main-loop in an infinite loop. This function tests, whether the controller is correctly rescued by the watchdog.

ui-emulate

The ui-emulate command emulates the rotary encoder and button from the shell. The following keys are available:

Key

Emulation

CTRL+C

Exit the command

ENTER

Button press: short released

s

Rotary Encoder: anti-clockwise

w

Rotary Encoder: clockwise

l

Button press: long

k

Button press: short

r

Button press: long released