Analog Devices Advantiv ADV7611 Hardware User's Manual page 149

Hardware User Guide UG-180
Using CEC Module as Initiator
Figure 60 shows the algorithm that can be implemented in the host processor controlling the ADV7611 to use the CEC module as an
initiator.
START
WRITE THE OUTGOING CEC COMMAND INTO
THE OUTGOING MESSAGE REGISTERS
(CEC MAP REG 0x00 TO 0x0F)
SET CEC_TX_FRAME_LENGTH
ACCORDING TO THE NUMBER OF BYTES IN
THE OUTGOING MESSAGE
SET CEC_TX_ENABLE TO 1
IS IS IS
NO NO NO
CEC_TX_READY_ST? CEC_TX_ARBITRATION_LOST_ST? CEC_TX_RETRY_TIMEOUT_ST?
YES YES YES
SET SET
SET CEC_TX_READY_CLR TO 1 CEC_TX_ARBITRATION_LOST_CLR CEC_TX_RETRY_TIMEOUT_CLR
TO 1 TO 1
THE LAST MESSAGE SENT BY THE CEC
THE CEC CONTROLLER LOST ARBITRATION
CONTROLLER WAS NOT ACKNOWLEDGED BY
THE LAST CEC MESSAGE WAS SENT
DURING THE TRANSMISSION OF THE LAST
THE TARGET DEVICE WITHIN THE NUMBER OF
WITHOUT ERROR
CEC MESSAGE
TRANSMISSION ATTEMPTS SPECIFIED IN
CEC_TX_RETRY[2:0]
END
Figure 60. Using CEC Module as Initiator
Rev. A | Page 149 of 184