Add (hardware) production tests for the TK-1 and TP-1 (#69)

* ch552 firmware: add ch55x support files directly

* Add sdcc compiler to docker image, for building CH552 firmware

* Rework production test script

* Add menu-based test runner
* Rewrite production test flows as lists of individual tests
* Add both production flows and manual tests to menu

* Switch to using included binaries

* production test: Update message format
* test_txrx_touchpad: Retry if device communications fail
* production test: put all binaries in binaries/ folder
* binaries/top.bin: replace broken binary

* flash_check: Check for explicit flash IDs

* Document most test procedures

* Test plan documentation

* Sample udev rules

* Production test: allow external references to be overridden

* Remove outdated descriptions

* Correct shebang

* Update shebangs to comply with PEP 394

Change the python scripts to call python instead of python3, as this
works cross platform. See:
https://peps.python.org/pep-0394/#for-python-script-publishers

* Move production test to higher-level directory

* Clarify production test setup

* Move USB C connector test to separate directory

Co-authored-by: Michael Cardell Widerkrantz <mc@tillitis.se>

hw/production_test/touch_stability_test/touch_analyzer.py

@@ -0,0 +1,49 @@
+#!/usr/bin/python3
+
+import struct
+import argparse
+
+# parser = argparse.ArgumentParser()
+# parser.add_argument("port")
+# args = parser.parse_args()
+
+class args:
+    port = '/dev/ttyACM1'
+    def __init__(self):
+        pass
+
+with open(args.port.replace('/','-'),'r') as f:
+    # Skip the first two lines since they might be corrupted
+    f.readline()
+    f.readline()
+
+    records = 0
+    tx_count_errors = 0
+    touch_count_changes = 0
+
+    [first_time,last_tx_count,last_touch_count] = [int(i) for i in f.readline().split(',')]
+
+    try:
+        while True:
+            [time,tx_count,touch_count] = [int(i) for i in f.readline().split(',')]
+
+            if tx_count != (last_tx_count + 1) % 256:
+                tx_count_errors += 1
+
+            if touch_count != last_touch_count:
+                touch_count_changes +=1
+                print('touch count change', time,touch_count,tx_count)
+
+            last_tx_count = tx_count
+            last_touch_count = touch_count
+
+            records += 1
+
+    except Exception as e:
+        print('tx_count errors:', tx_count_errors,
+                'touch_count_changes:', touch_count_changes,
+                'records:', records)
+
+        time_hours = (time - first_time)/60/60
+        print('run time:{:.1f} hours'.format(time_hours))
+

hw/production_test/touch_stability_test/touch_recorder.py

@@ -0,0 +1,21 @@
+#!/usr/bin/python3
+
+import serial
+import struct
+import argparse
+import time
+
+parser = argparse.ArgumentParser()
+parser.add_argument("port")
+args = parser.parse_args()
+
+s = serial.Serial(args.port, 9600)
+while True:
+    [report_count, touch_count] = struct.unpack('<BB', s.read(2))
+    data = ','.join([str(x) for x in (int(time.time()), report_count, touch_count)])
+
+    print(data)
+    with open(args.port.replace('/','-'),'a') as f:
+        f.write(data)
+        f.write('\n')
+