ir_tx/sony.py

   1 # sony.py Encoder for IR remote control using synchronous code
   2 # Sony SIRC protocol.
   3
   4 # Author: Peter Hinch
   5 # Copyright Peter Hinch 2020 Released under the MIT license
   6
   7 from micropython import const
   8 from ir_tx import IR
   9
  10 class SONY_ABC(IR):
  11
  12     def __init__(self, pin, bits, freq, verbose):
  13         super().__init__(pin, freq, 3 + bits * 2, 30, verbose)
  14         if bits not in (12, 15, 20):
  15             raise ValueError('bits must be 12, 15 or 20.')
  16         self.bits = bits
  17
  18     def tx(self, addr, data, ext):
  19         self.append(2400, 600)
  20         bits = self.bits
  21         v = data & 0x7f
  22         if bits == 12:
  23             v |= (addr & 0x1f) << 7
  24         elif bits == 15:
  25             v |= (addr & 0xff) << 7
  26         else:
  27             v |= (addr & 0x1f) << 7
  28             v |= (ext & 0xff) << 12
  29         for _ in range(bits):
  30             self.append(1200 if v & 1 else 600, 600)
  31             v >>= 1
  32
  33 # Sony specifies 40KHz
  34 class SONY_12(SONY_ABC):
  35     def __init__(self, pin, freq=40000, verbose=False):
  36         super().__init__(pin, 12, freq, verbose)
  37
  38 class SONY_15(SONY_ABC):
  39     def __init__(self, pin, freq=40000, verbose=False):
  40         super().__init__(pin, 15, freq, verbose)
  41
  42 class SONY_20(SONY_ABC):
  43     def __init__(self, pin, freq=40000, verbose=False):
  44         super().__init__(pin, 20, freq, verbose)
  45