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read_keys.py
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read_keys.py
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#!/usr/bin/env python3
import smbus # install python3-smbus with apt
import time
i2c = smbus.SMBus(1)
addr = 0x28
def read(reg):
v = i2c.read_byte_data(addr, reg)
return v
def readw(reg):
v = i2c.read_word_data(addr, reg)
return v & 0x00ff, (v & 0xff00) >> 8
def write(reg, v):
i2c.write_byte_data(addr, reg, v)
def setup():
read(0x00)
read(0x0a)
read(0x01)
read(0x40)
read(0x41)
read(0x48)
read(0x00)
readw(0x04)
read(0x01)
read(0x0a)
read(0x00)
read(0x0a)
read(0x01)
write(0x88, 0x08)
write(0x82, 0x05)
read(0x00)
read(0x0a)
write(0x82, 0x02)
write(0x82, 0x03)
def setup_simple():
"""Simplified sequence without redundant calls"""
print('Waiting the MCU to get ready')
st = read(0x00)
while st & 0x40 != 0:
print('.', end='')
st = read(0x00)
time.sleep(0.1)
working = read(0x0a) & 0x01 > 0
if working:
print('MCU is working')
else:
print('MCU is suspended')
event = read(0x01) & 0x20 > 0
if event:
print('Event is enabled')
else:
print('Event is disabled')
v = read(0x40)
print(f'Reg (R) 0x40 -> {v:#04x}')
read(0x41)
print(f'Reg (R) 0x41 -> {v:#04x}')
read(0x48)
print(f'Reg (R) 0x48 -> {v:#04x}')
write(0x88, 0x08)
print('Reg (W) 0x88 = 0x08')
write(0x82, 0x05)
print('Reg (W) 0x82 = 0x05')
write(0x82, 0x02)
print('Reg (W) 0x82 = 0x02')
write(0x82, 0x03)
print('Reg (W) 0x82 = 0x03')
def read_keys():
keys = []
n, key = readw(0x04)
if key == 0x00:
return
keys.append(key)
if n >= 1:
k1, k2 = readw(0x04)
keys = keys + [k1, k2]
keys = keys[:n]
print(f"N = {n:#04x}")
keys = [f"{key:#04x}" for key in keys]
print(f"Keys = {', '.join(keys)}")
setup_simple()
while True:
time.sleep(0.1)
read_keys()