## TI Confidential - NDA Restrictions
## 
## Copyright 2018 Texas Instruments Incorporated. All rights reserved.
## 
## IMPORTANT: Your use of this Software is limited to those specific rights
## granted under the terms of a software license agreement between the user who
## downloaded the software, his/her employer (which must be your employer) and
## Texas Instruments Incorporated (the License). You may not use this Software
## unless you agree to abide by the terms of the License. The License limits your
## use, and you acknowledge, that the Software may not be modified, copied or
## distributed unless embedded on a Texas Instruments microcontroller which is
## integrated into your product. Other than for the foregoing purpose, you may
## not use, reproduce, copy, prepare derivative works of, modify, distribute,
## perform, display or sell this Software and/or its documentation for any
## purpose.
## 
## YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
## PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
## INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
## NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL TEXAS
## INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
## NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER LEGAL
## EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES INCLUDING BUT NOT
## LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE OR CONSEQUENTIAL
## DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT OF SUBSTITUTE GOODS,
## TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT
## LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
## 
## Should you have any questions regarding your right to use this Software,
## contact Texas Instruments Incorporated at www.TI.com

import time 

## *********************************************
## Set up Variables
## *********************************************
serAddr = 0x18

## *********************************************
## Initialize HDCP
## *********************************************
board.WriteI2C(serAddr,0xc3,0x1) #Enable HDCP
time.sleep(0.1)
HDCP_STS = board.ReadI2C(serAddr,0xc4,1)
if (HDCP_STS & 0x22) == 0x22:   #Check if KSV is ready and RX_LOCK_DET is high
  RX_BKSV0 = board.ReadI2C(serAddr,0x80,1)
  RX_BKSV1 = board.ReadI2C(serAddr,0x81,1)
  RX_BKSV2 = board.ReadI2C(serAddr,0x82,1)
  RX_BKSV3 = board.ReadI2C(serAddr,0x83,1)
  RX_BKSV4 = board.ReadI2C(serAddr,0x84,1)
  RX_BCAPS = board.ReadI2C(serAddr,0xa0,1)
  board.WriteI2C(serAddr,0xc3,0x10) #Set KSV_VALID
board.WriteI2C(serAddr,0xc3,0x20) #Set KSV_LIST_VALID
  time.sleep(0.1)
  HDCP_STS = board.ReadI2C(serAddr,0xc4,1)
  if (HDCP_STS & 0x01) == 0x01:   #Check if HDCP is Authenticated
      print "HDCP Authenticated"
  else:
      print "HDCP Authentication Failed"
else:
  print "Error - No KSV received from DES or no RX_LOCK_DET present"