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AM5749: IDK Host connection

Part Number: AM5749

Couldn't figure out how to receive the data from EVM to the host machine running Ubuntu Linux 18 with minicom. The online help demonstrates connecting USB cable with 232 port . However, I didn't find any 232 port on EVM. There is a 485 port though, but didn't receive any data on this port as well. Can someone kindly explain "clearly" how to connect the EVM with host.

Best,

  • You should connect a USB cable to the Micro-AB connector J19. When connected a USB serial device should appear on your Host PC.

  • Many thanks for response.

    I did follow your instructions. Minicom shell at host seems connected. However, when I boot up the system, nothing shows up at the minicom shell whereas HDMI screen shows matrix startup web page properly. Furthermore, several demos are running properly.

    I observed a strange phenomenon that whenever I pressed any key on Minicom Shell while EVM was up and running, the EVM rebooted! Couldn't understand why? Might there be any hardware fault?

    EXTRA INFORMATION: The factory Linux installation SDCard that shipped with the EVM was not showing any output on both HDMI and Minicom. Therefore, I used the create_sdcard.sh script and created my own installation which seems to be working fine as far as HDMI output is concerned. The issue is there is no output on Minicom.

    Thanks for your help in advance.

  • Please check that your PC terminal is configured to 115200-8-N-1.

  • Yes. Exactly same settings.

  • Adnan Khan3 said:
    I observed a strange phenomenon that whenever I pressed any key on Minicom Shell while EVM was up and running, the EVM rebooted! Couldn't understand why? Might there be any hardware fault?

    This means you have the wrong USB port connected to using minicom. Some/most of our boards have a (very basic) on-board JTAG emulator such as a simple FTDI USB-to-GPIO converter, which in some instances can trigger a device reset when you send it seemingly random characters. Most of the time it is the second USB port you want for serial console purposes. Please have a look at 'ls /dev/ttyUSB*' for other USB ports to try.

    Regards, Andreas