did you configure the pin through pinmux spreadsheets and re-flashing the board with new *.cfg file? could you please share your steps for reference, thanks
Hi:
I burned the BCT cfg file with tegra19x-mb1-pinmux-p2888-0000-a04-p2822-0000-b01.cfg.
The steps what i used are as follows:
Modify gpio43 (pq7) to the internal pull-up and output status in the pinmux spreadsheets file, and then click the generate button to generate three configuration files: tegra19x Jetson_ agx_ xavier-pinmux tegra19x-jetson_ agx_ Xavier GPIO default and tegra19x Jetson_ agx_ xavier-padvoltage-default。
Copy these three files to flashtool / Linux_ for_ Tegra / kernel / pinmux / t19x / path, and then use the script to generate galen.cfg,
Copy the value of the register in galen.cfg and overwrite flashtool / Linux_ for_ Values of corresponding registers in Tegra / bootloader / t186ref / BCT / tegra19x-mb1-pinmux-p2888-0000-a04-p2822-0000-b01.cfg file
Burn BCT configuration file
Start the machine and check the value of the corresponding register and the status of the corresponding pin.
Meanwhile I set this pin as an internal pull-up output and write the value from the application layer. When writing 1, the measured voltage is only 0.2 ~ 0.3V. Is the internal driving capability of this pin poor? If not, how can pinmux be configured to ensure the strongest driving capability?
Do you mean that the current IO (PQ7) pins cannot be directly output to the specified high level, so additional level shift chips are needed? Meanwhile, could you please provide a link to the schematic diagram of P2822?
Hi ,
The pin K56 GPIO19 is direct connect from Xavier to 88Q2112,The GPIO out used as rst# signal for 88Q2112 with out extend pull Up or Pull Down.we disconnect trace and we can’t driver The GPIO 19 pin high。
Hello, I use Xavier devit carrier to burn the JP4.4 system(sudo ./flash.sh jetson-xavier mmcblk0p1), and then check it after power-on, and follow the following steps in the application layer:
cd /sys/class/gpio/
echo 423 > export
cd gpio423
echo out > direction
echo 1 > value
Then monitor the corresponding GPIO (PQ7) pin level. Although it is later pulled up, the voltage amplitude can only reach 2~3V.
Could you please confirm whether the pin has this defect?
There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks
Have you tried to disconnect it from PCIe connector (removing R838 on devit carrier) and measure its level?