Posts made by george

@zensation
Software modification pull-down:

• specifies that the default pull-down of GPIO needs to be modified in the kernel DTS file, path:/arch/arm64/boot/dts/rockchip. After the modification is completed, compile and generate a DTB file, and then replace it.

Hardware modification pull-down:

• You can change the default pull-down situation of IO by connecting a pull-down resistor to GPIO. The default pull-up change is to connect a 2K resistor to the GND network, and the default pull-down change is to connect a 4.7K resistor to a 3.3V power supply.

@cyberwisk
The firmware can be obtained from the following website
https://coolpi-my.sharepoint.com/personal/coolpi_coolpi_onmicrosoft_com/_layouts/15/onedrive.aspx?ga=1&id=%2Fpersonal%2Fcoolpi_coolpi_onmicrosoft_com%2FDocuments%2Fcoolpi%2Fcoolpi%2FCoolPi 4B%2Fbatocera]

@diudiutong 这个看log是网络连接问题，默认的镜像已经集成GPU驱动。

@bbsvs2000 有支持

@SSHLY 这个是PADS格式的。不是AD.

@jugg 这个还是从应用软件想办法解决，底层暂时没有可以修改的。可以参考一下MPV播放器的源码实现。

@jugg 默认MPV播放器是否有问题

@jugg 这个只需要替换内核就可以了。跟之前其它FS的方法是一样的。

@jugg 你是什么机器CP4B/CM5，需要接什么屏幕？

@jugg 更新系统不会破坏loader文件。不需要重新升级loader。

@jugg 自己修改一下fstab。

@zensation
The current operation method does not support configuring the up and down status. If you need to modify the up and down status of GPIO, you can use DTS's PINCTRL to achieve it.

	lcd {
		lcdpwr_en: lcdpwr-en {
			rockchip,pins = <1 RK_PC4 RK_FUNC_GPIO &pcfg_pull_down>;
		};
		bl_en: bl-en {
			rockchip,pins = <4 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>;
		};
	};

@zensation
First, set the password for the root user, and then log in as root.

coolpi@Ubuntu:~$ sudo passwd root
[sudo] password for coolpi: 
New password: 
BAD PASSWORD: The password is shorter than 8 characters
Retype new password: 
passwd: password updated successfully
coolpi@Ubuntu:~$ su
Password: 
root@Ubuntu:/home/coolpi# echo 128 > /sys/class/gpio/export
root@Ubuntu:/home/coolpi# cd /sys/class/gpio/
root@Ubuntu:/sys/class/gpio# ls
export   gpiochip0    gpiochip32   gpiochip64  unexport
gpio128  gpiochip128  gpiochip509  gpiochip96
root@Ubuntu:/sys/class/gpio# 

@zensation
Can you be more specific about which commands are not working.

@reddfoxx
Thank you for your suggestion. As I haven't paid too much attention to ARMBIAN, I have only tried to develop the corresponding firmware. Currently, my main focus is on Ubuntu Debian Android and the optimization and expansion of the upper and lower layers of the system. You can try adding the Armbian mainline in the future.

@jugg 目前仅支持三屏扩展的方式，mirror暂时不支持。框架本身就不支持。

@jugg 进入系统先新建一个管理员账户，重启，使用新建的管理员账户登陆，然后删除coolpi账户即可。

@jugg 默认用户名：coolpi 密码：123，进入系统以后可以自己添加或者修改。

@jugg 升级最新版本的测试，最先版本可以在百度网盘或者onedrive下载：
CP4

CM5

@jugg 你用的那个版本的系统发出来。

@jugg 现在发布的ubuntu都是默认支持wayland和X11的。

@zensation
The firmware I tested is the latest version 20230613, and you can check if there is a problem with your power adapter causing the reboot.

@zensation
I tested the latest image of ubuntu22.04 and did not find the problem you described. As shown in the following figure, the PWR button is configured as suspend. The first press to enter sleep can be seen from the log information, and the second press to wake up the system.

@zensation I will confirm the CP4 machine and reply to you with the results later.

@zensation The latest images can support suspend operations, including ubuntu. Are you using CP4 or CM5

@jugg 需要把loader更新到最新。不是内核。

@zensation At present, when the machine enters suspend mode, all power supplies in the system will be turned off, and only the memory self refresh function will be retained. Currently, there is no support for exporting the memory data you described to the hard drive.

@zensation The latest kernel currently supports sleep mode. Please describe the specific operating scenarios required.

@blank Official document description: The pcie30x4 controller operates in EP mode and can be used in 4Lane mode or 2Lane mode using pcie30phy's port0. The 2lane in pcie30phy's port1 can be used as an RC in conjunction with other controllers.

• The SSD of the CM5 machine corresponds to the PCIE30 PORT0 interface

@阿里 都是独立的uart控制器，没有问题的。