precise power measurement script

old-commit-hash: 3b2421baa0

selfdrive/hardware/tici/precise_power_measure.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+import numpy as np
+from common.realtime import Ratekeeper
+
+if __name__ == '__main__':
+  RATE = 123
+  print("measuring for 5 seconds at %dhz 3 times" % RATE)
+  rk = Ratekeeper(RATE, print_delay_threshold=None)
+
+  for _ in range(3):
+    pwrs = []
+    for _ in range(RATE*5):
+      with open("/sys/bus/i2c/devices/0-0040/hwmon/hwmon1/power1_input") as f:
+        pwrs.append(int(f.read()) / 1000.)
+      rk.keep_time()
+    print("mean %.2f std %.2f" % (np.mean(pwrs), np.std(pwrs)))
+