def _SetPixelMode(self):
"""Sets the pixel mode based on the pixel clock of the input signal.
Returns:
True if pixel mode is changed; False if nothing is changed.
"""
pclk = self._rx.GetPixelClock()
logging.info('PCLK = %s', pclk)
if (self._PIXEL_MODE_PCLK_THRESHOLD_LOW <= pclk <=
self._PIXEL_MODE_PCLK_THRESHOLD_HIGH):
# Hysteresis: do not change mode if pclk is in this buffer zone.
return False
dual_pixel_mode = pclk >= self._PIXEL_MODE_PCLK_THRESHOLD_HIGH
if self._is_dual_pixel_mode != dual_pixel_mode:
self._is_dual_pixel_mode = dual_pixel_mode
if dual_pixel_mode:
self._rx.SetDualPixelMode()
logging.info('Changed to dual pixel mode')
else:
self._rx.SetSinglePixelMode()
logging.info('Changed to single pixel mode')
self._frame_manager = frame_manager.FrameManager(
self._input_id, self._rx, self._GetEffectiveVideoDumpers())
self.Select()
return True
return False
def __init__(self, input_id, main_i2c_bus, fpga_ctrl):
"""Constructs a FpgaInputFlow object.
Args:
input_id: The ID of the input connector. Check the value in ids.py.
main_i2c_bus: The main I2cBus object.
fpga_ctrl: The FpgaController object.
"""
super(FpgaInputFlow, self).__init__()
self._input_id = input_id
self._main_bus = main_i2c_bus
self._fpga = fpga_ctrl
self._power_io = self._main_bus.GetSlave(io.PowerIo.SLAVE_ADDRESSES[0])
self._mux_io = self._main_bus.GetSlave(io.MuxIo.SLAVE_ADDRESSES[0])
self._rx = self._main_bus.GetSlave(self._RX_SLAVES[self._input_id])
self._frame_manager = frame_manager.FrameManager(
input_id, self._rx, self._GetEffectiveVideoDumpers())
self._edid = None # be overwitten by a subclass.
self._edid_enabled = True
self._ddc_enabled = True
self._timer = None