NXP iMX XBAR PWM AOI Notes

vlc_xbar.c

//------------------------------------------------------------------------------
void vlc_xbar_init(void) {

  // Initialise multiplexer
  XBARA_Init(XBARA1);
  XBARB_Init(XBARB2);

  // disable faults for cam1 and cam2 PWM systems so they can be enabled
  XBARA_connect(XBAR_ENABLE, kXBARA1_OutputFlexpwm1Fault0);
  XBARA_connect(XBAR_ENABLE, kXBARA1_OutputFlexpwm2Fault0);

  // disable before setting up IRQ to make sure we don't get any false triggers
  XBARA_connect(XBAR_DISABLE, kXBARA1_OutputDmaChMuxReq30);
  XBARA_connect(XBAR_DISABLE, kXBARA1_OutputDmaChMuxReq31);

  // external trigger signal is routed trough CMP3 and CMP4 to be able to 
  // invert the trigger signal
  XBARB_connect(kXBARB2_InputAcmp3Out, kXBARB2_OutputAoi1In00);
  XBARB_connect(kXBARB2_InputAcmp4Out, kXBARB2_OutputAoi1In01);

  vlc_xbar_setup_ext_trig_iqr();

  return;
}