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authorFranklin Wei <franklin@rockbox.org>2019-12-12 15:35:50 -0500
committerFranklin Wei <franklin@rockbox.org>2019-12-12 15:35:50 -0500
commit4aa8ec11c9b149b5eaf523804fce27d87790b5b9 (patch)
tree2587e30c79194883b391387131f2b11fe5436418
parente6ba5b15f5f4be010d679ac75fb2408c9f6c3f5a (diff)
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# Regenerative Braking Tester
-This sketch advances the states of pins 2 and 3 through the following
-states:
+This repo contains the Arduino code (C) and control software (Python)
+for a regenerative braking test stand. The Arduino code resides in
+`main/main.ino`, and the control software resides in `tools/`.
+
+The Arduino and control software communicate via a custom protocol
+over serial.
+
+## Arduino Code
+
+The Arduino maintains a state machine, which advances the states of
+pins 2 and 3 through the following states:
1. 2 high, 3 low
2. 2 low, 3 low
@@ -13,5 +22,21 @@ circuit will produce acceleration and regenerative braking of an
attached motor.
The program will also regularly poll the current detected by an ACS712
-Hall effect current probe attached to A0 and output the current (in
+Hall effect current probe attached to A1 and output the current (in
amperes) via serial.
+
+## Control Interface
+
+The primary control software for interfacing with the Arduino is
+`tools/controller.py`. To run it, attach the Arduino via USB and run
+it with root privileges. The software will attempt to connect to the
+Arduino and will run through the steps of a trial. Data will be output
+to standard output, from which it can be logged and processed.
+
+### Tachometer
+
+Speed sensing is done separately by `tools/tachometer.py` (requires
+OpenCV to be installed: `pip install opencv`). Run this with a webcam
+attached and pointed at the regions of interest, and it will prompt
+you to select the two regions of interest in a camera frame. The speed
+plots will then be displayed and updated in real time.