Beaglebone AI uart enable

Are you talking about the serial debug port available on board or peripheral UART ports available on the cape?

Please give some more information of what you are trying to do.

BTW shabaz has written a really nice "Getting started" article last year. Please refer that as well. BeagleBone AI (BB-AI) - Getting Started

Regards,

Aswin

Thank you, sir,

                       I am able to read analog pins and run blink led code using Cloud9, now I start configuring UART for transmission and reception of data. but capemgr directory is missing in /sys/devices directory please help me on the same.

Did you enable the cape peripherals on the uboot config file?

If no please enable that.

go to vi /boot/uboot/uEnv.txt

and enable the peripherals u want.

cape_enable=capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4, BB-UART5

Reboot the system and look for the new serial tty devices.

ls -l /dev/ttyO*

Let me know if this worked.

Regards,

Aswin

Yes sir,

                 i have tried with option but i am not getting cape_enable=capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4, BB-UART5  this in /boot/uboot/uEnv.txt.

my uEnv.txt file looks like as below,

Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0

uname_r=4.14.108-ti-r135

#uuid=

dtb=am5729-beagleboneai-custom.dtb

cmdline=coherent_pool=1M net.ifnames=0 rng_core.default_quality=100 quiet

#In the event of edid real failures, uncomment this next line:

#cmdline=coherent_pool=1M net.ifnames=0 rng_core.default_quality=100 quiet video=HDMI-A-1:1024x768@60e

##enable Generic eMMC Flasher:

#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3-no-eeprom.sh

Also i am getting some errors at below point while updating board using BeagleBone AI Survival Guide | element14 | Vision Thing

Install BoneScript and setup a pin for use:

cd /usr/local/lib⏎
sudo npm install --unsafe-perm bonescript@0.7.4-beta1⏎
node -pe "require('bonescript').bone.getPinObject('p9.15').ai.gpio"   (this sets up the pin in /sys/class/gpio)

Can you add this line to the end of the file ?

cape_enable=capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4,

and try??

Hi, I have added above line in uEnv.txt file save it and reboot the system, and have got the result on bash window as below,

debian@beaglebone:/var/lib/cloud9$ ls -l /dev/ttyO*

lrwxrwxrwx 1 root root 5 Jun 10 05:05 /dev/ttyO0 -> ttyS0

lrwxrwxrwx 1 root root 5 Jun 10 05:05 /dev/ttyO5 -> ttyS5

debian@beaglebone:/var/lib/cloud9$

Hi Mahesh,

Which means that serial O0 and O5 are enabled. Can you write some python script to test the echo feature ?

Short the RX and TX pins using a jumper wire. Send and receive characters on the same UART.

Regards,

Aswin

Hi Aswin,

               I have shorted RX and TX of UART5 which pin no. P9.11 and P9.13. and test on minicom, but I am not getting any echo when I have typed on keyboard. one more question that serialO5 is UART5 or anything else.

Interesting! I think you have to change the pin musing in the device tree file.

Follow this:

https://github.com/beagleboard/beaglebone-ai/issues/37

Also please confirm the pin mapping using "show-pins" command.

Regards,

Aswin