ir_tx/philips.py

   1 # philips.py Encoder for IR remote control using synchronous code
   2 # RC-5 and RC-6 mode 0 protocols.
   3
   4 # Author: Peter Hinch
   5 # Copyright Peter Hinch 2020 Released under the MIT license
   6
   7 from micropython import const
   8 from sys import platform
   9 from ir_tx import IR
  10
  11 # Philips RC5 protocol
  12 _T_RC5 = const(889)  # Time for pulse of carrier
  13 ermsg = 'ESP32 does not support Philips protocols'
  14 class RC5(IR):
  15
  16     def __init__(self, pin, freq=36000, verbose=False):
  17         super().__init__(pin, freq, 28, 30, verbose)
  18
  19     def tx(self, addr, data, toggle):
  20         d = (data & 0x3f) | ((addr & 0x1f) << 6) | ((data & 0x40) << 6) | ((toggle & 1) << 11)
  21         self.verbose and print(bin(d))
  22         mask = 0x2000
  23         while mask:
  24             if mask == 0x2000:
  25                 self.append(_T_RC5)
  26             else:
  27                 bit = bool(d & mask)
  28                 if bit ^ self.carrier:
  29                     self.add(_T_RC5)
  30                     self.append(_T_RC5)
  31                 else:
  32                     self.append(_T_RC5, _T_RC5)
  33             mask >>= 1
  34
  35 # Philips RC6 mode 0 protocol
  36 _T_RC6 = const(444)
  37 _T2_RC6 = const(889)
  38
  39 class RC6_M0(IR):
  40
  41     def __init__(self, pin, freq=36000, verbose=False):
  42         super().__init__(pin, freq, 44, 30, verbose)
  43
  44     def tx(self, addr, data, toggle):
  45         # leader, 1, 0, 0, 0
  46         self.append(2666, _T2_RC6, _T_RC6, _T2_RC6, _T_RC6, _T_RC6, _T_RC6, _T_RC6, _T_RC6)
  47         # Append a single bit of twice duration
  48         if toggle:
  49             self.add(_T2_RC6)
  50             self.append(_T2_RC6)
  51         else:
  52             self.append(_T2_RC6, _T2_RC6)
  53         d = (data & 0xff) | ((addr & 0xff) << 8)
  54         mask = 0x8000
  55         self.verbose and print('toggle', toggle, self.carrier, bool(d & mask))
  56         while mask:
  57             bit = bool(d & mask)
  58             if bit ^ self.carrier:
  59                 self.append(_T_RC6, _T_RC6)
  60             else:
  61                 self.add(_T_RC6)
  62                 self.append(_T_RC6)
  63             mask >>= 1