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AM18x serial ports availability - UART

Sepehr Attarchi
Prodigy 140 points
Other Parts Discussed in Thread: AM1808

 

Hi

I am working with AM18x zoom development kit, with wifi daughter card. When I type $ dmesg | tty in the console I got the following lines:

root@am180x-evm:~# dmesg | grep tty
Kernel command line: console=ttyS2,115200n8 root=/dev/mmcblk0p2 rw rootwait ip=off
serial8250.0: ttyS0 at MMIO 0x1c42000 (irq = 25) is a AR7
serial8250.0: ttyS1 at MMIO 0x1d0c000 (irq = 53) is a AR7
serial8250.0: ttyS2 at MMIO 0x1d0d000 (irq = 61) is a AR7
console [ttyS2] enabled

I am assuming that I have three serial port. ttys2 is used for the console and is connected to my pc. UART1 is set on the one of the expansion board connector and used for the wifi daughter card. I am wondering do I have access to ttys0? and on which connector?

Thanks,

Sepehr

  • 0
    TI__Genius 12480 points

    Sepher,

    What exact base board hardware are you using, you would need to check the connection between your SOM and base board. You can download the design files and schematics from Logic PD web page. In addition you might need to setup the MUX correct in software to be able to access the UART. There are several post on the topic on the forum.

    -Jonas

  • 0 in reply to Firefighter
    Prodigy 140 points

    Hi Jonas

     

    I'm using AM1808EVM development kit (or logicpd's Zoom development kit), with of course AM1808 som-m1 system on module. I looked into the hardware design files as you said and I found I have the uart0 available on the J28 connector on the base board. uart2 is set as default serial port and is used for terminal communication through DB9 connector. uart1 is also available J30 connector. I haven't used the uart0 yet, but as the os already recognized it, my guess is it will work.

    Thanks for your answer.

    Sepehr