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the question of communication of uart on PGA 450.

user1842403
Prodigy 10 points
Other Parts Discussed in Thread: TIDA-00151

hi ,when i use the PGA450EVM  .when  i was  do as the PDF of  PGA450Q1EVM-S User's Guide and TIDA-00151 UART Demo Instructional ,but it doesn't work after i take the steps on pag 7  2.2.3 step 11 ater i config the uart and check ok then i transmit ox 00 ,0x55,0x01,0x00. but it can't  receive 0x 12,0x34. 0xb9 .it receive as the  transmit ox 00 ,0x55,0x01,0x00. can you tell me why and what's worng with the PGA450.

  • 0
    TI__Mastermind 27950 points
    user1842403,
    Have you connected the TIGER board only to the PGA450Q1EVM-S hardware, and not the full scale PGA450EVM also?
    Can you verify that the Tx and Rx pins are not shorted? The transmitted data should not appear at the receive buffer, unless these pins are somehow shorted to one-another. Try disconnect the EVM-S Rx pin from the TIGER, and then check the results. Do the same by only disconnecting the EVM-S Tx pin from the TIGER, and then check the results. In either case, did the RX queue print the transmitted values again?