Hello, I encountered some problems when configuring the can device tree. I need your help. Thank you. In the following settings, gpio_ can_ stb and gpio_ can_ en What are the functions of the two attributes? mttcan@c310000 { status = "okay"; gpio_can_stb = <&tegra_aon_gpio TEGRA_AON_GPIO(A…

Still don’t understand. I found that no matter how I set these two attributes (high, low, or delete), they do not affect the use of the can bus. mttcan@c310000 { status = "okay"; gpio_can_stb = <&tegra_aon_gpio TEGRA_AON_GPIO(AA, 0) GPIO_ACTIVE_HIGH>; gpio_can_en = <&tegra_aon_gpio TEGR…

hello Yolomei, is the CAN interface up for the usage? may I know how you update the device tree?

After I finish setting in the device tree, use the following command to update the device tree: sudo ./flash.sh -k kernel-dtb jetson-tx2 mmcblk0p1 After updating the device tree, use the following command to test： candump can0 & cansend can0 123#abcdabcd

hello Yolomei, please also check below… there’s cboot options for loading device tree via file system. it’s checking /boot/extlinux/extlinux.conf for the FDT entry, if that’s specified, it’ll prior to kernel-dtb partition for loading device tree blob.

I don’t quite understand what you mean. What I want to ask is, gpio_ can_ stb and gpio_ can_ en What are the functions of the two attributes? Why do my settings of these two attributes not affect the test results of the can bus

hello Yolomei, so, please ensure you’ve update device tree correctly.

Each time, it is retested after successful flash. So, where can I see the describe of these two attributes

hello Yolomei, is this driver has enabled? it’s mttcan driver to parse device tree for these two properties. for example, $public_sources/kernel_src/kernel/nvidia/drivers/net/can/mttcan/native/m_ttcan_linux.c static int mttcan_probe(struct platform_device *pdev) { ... priv->gpio…

Ok, thank you! In the source code, the two attributes of these two nodes are the settings of the following soc pins: [image] However, according to the OEM documentation, I should set the GPIO attribute of C19 C20 E18 C17 pin. As shown in the figure below: [image] Why is this?

Config of can device tree

Robotics & Edge Computing Jetson Systems Jetson TX2

JerryChang October 24, 2022, 8:09am 3

hello Yolomei,

it’s the device tree to configure default pin state, you may update those settings.
you may see-also Topic 63300 to enable and check CAN on TX2.
thanks

Topic		Replies	Views
How can I control CAN bus on TX2? Jetson TX2	11	4818	April 16, 2019
Pinmux for CAN0_STBY (E17 ) Jetson TX2	3	663	September 8, 2018
TX2 GPIO Is not working_gpio_can_stb Jetson TX2	1	591	August 22, 2019
Why CAN_STB pin alwaws low? Jetson TX2	6	1484	May 29, 2019
CAN-Bus Enable Jetson TX2 can-bus	12	1417	May 11, 2022
enable CAN bus , wrong Jetson TX2	1	1053	June 15, 2017
CAN0, CAN1 not working even after enabling in PIN MUX spreadsheet Jetson AGX Xavier can-bus	51	1820	December 5, 2023
how can enable can bus in TX2 Jetson TX2	2	2622	June 12, 2017
CAN problem on custom TX2-4GB board Jetson TX2	8	1618	November 2, 2020
TX2 controller area network (CAN bus) configuration Jetson TX2 can-bus	6	1204	August 16, 2022

Config of can device tree

Related topics