Posts made by george

@retroman The problem of wifi bt has been solved. Please follow github to submit or download the latest firmware test. Thank you.

@retroman The problem of WIFI BT is being solved. An update will be released in the next few days.

@retroman Please follow that github will continue to update, thank you.

@retroman https://www.cool-pi.com/topic/162/how-to-upgrade-the-boot-loader-of-coolpi-4b?_=1673496991046

If you need to boot armbian normally, you need to update the loader file to version 0104.

Follow the steps below to update the loader:

• Download the latest loader file One Drive
  ![5594e1d4-3a7b-46fc-a7b5-2a9fe418dfc0-image.png]
  

• Short the 2 pins shown by the arrow.
  

• The USB interface and computer connection.
  

• Plug in the power supply and open the upgrade software. The machine enters the maskrom upgrade mode.
  

• choose to write by address
  

• Click Execute to complete the loader update.
  

• If the computer prompts that the USB driver cannot be found, please download and install the driver software first.One Drive
  

@retroman Try formatting the TF card before mirroring it. If it does not work properly, it is recommended to upgrade the loader file.

@HiramXMaxim The EMMC small board has an adapter for converting to TF card, which can be written to the EMMC using a common card reader. As shown in the figure below.

Open source repositories:Github
Image download:One Drive 百度网盘

Open source repositories:Github
Image download:One Drive

enable 3D acceleration:

sudo add-apt-repository ppa:george-coolpi/mali-g610
sudo add-apt-repository ppa:george-coolpi/multimedia
sudo apt update
sudo apt dist-upgrade

installing the MPV video player:（Support rkmpp hardware decoding）

sudo apt-get install mpv

@retroman Thank you for your suggestion. We will discuss the time point of support internally.

@retroman The armbian image of coolpi will be released soon.

@harry-huang
https://m.tb.cn/h.UPjG7P6?tk=NHJfdfghK8D CZ0001 「树莓派3B+4B通用亚克力外壳多主板多层堆叠加自由组装集群实验4层」
点击链接直接打开 或者 淘宝搜索直接打开

@allen 更新内核代码，已经解决了概率鼠标消失问题。
@cbratschi Add onedrive download link.

@花月 注意python版本，其它都是一样的。ubuntu22.04 默认python3.10，要注意切换一下。

@花月 具体一些，需要哪部分？因为本身linux系统相当庞大，基础的操作文档网络上的资料可能更系统一些。如果针对某些特定模块可以提出来。

@tscmga 在你自己做的这个板子上面把HPD信号的驱动能力增强试试。极限情况下可以直接接5V.
下面这款我们有测试过：
https://item.taobao.com/item.htm?spm=2013.1.w4004-23984179834.16.614775a021CPsL&id=654936181802

@tscmga 这种非标设备暂时没有很好的办法兼容，会导致故此失比，我们之前有测试一款7寸的HDMI+USB触摸的是可以正常使用的，晚一点发链接给你。

@night 机器TYPEC前端电源芯片耐压可以达到28V，极限可以到34V，所以你的适配器规格没有任何问题。
开发板的电源部分一直是我们设计最优先考虑的方向，所以前端第一级电源花了很多功夫，考虑到用户各种各样适配器的规格，最终选择目前国内少数几家真正能做车规级别电源方案的厂家。尽量保证前端电源稳定可靠。

@zensation If this is the case, it means that the image you are using is incorrect, or it is not successfully created.

@zensation The radiator can be matched with raspberry pi. A separate fan is OK. Normally, it is not necessary to add aluminum alloy fins on the CPU.

@zensation You can use the shell to log in, expand the partition capacity, and then try to log in from the UI interface.

@tscmga 插拔HDMI设备，打印一份dmesg贴出来。

@Wario
https://buyertrade.taobao.com/trade/detail/tradeSnap.htm?spm=a1z09.2.0.0.3ce72e8d76YGWb&tradeID=2860426011740331265&snapShot=true

The POE module in the link has been validated and tested and can be directly supported.

CPU

测试方法：

sudo apt install sysbench

RK3588S单核心每秒事件数2598，8核每秒事件数13846；同步对比 i7-7700 ，单核每秒事件数1438，8核每秒事件数8469。可见ARM在CPU方面并不比X86弱。

GPU

测试方法：

sudo apt-get install glmark2* -y

X11 gl

X11 gles 3.1

WAYLAND gl

WAYLAND gles 3.1

机器没有识别到这个HDMI设备。可能是接口或者分辨率非标准导致。

@allen 插入HDMI的情况下敲如下命令：
cat /sys/class/drm/card0-HDMI-A-1/enabled

内核更新到最新测试，然后打印一份dmesg传上来。

如下表所示，40pin连接器包含7个可用于输出PWM信号的GPIO，其中PIN5 PIN12共用PWM3，PIN38 PIN40共用PWM15，这两个PWM信号同一时刻只能从一个GPIO输出，不能2个GPIO同时输出，所以40PIN连接器一共有5个独立的PWM口可以同时工作 ：

DTS配置

PWM2口配置如下，其它接口类似，首先配置PWM接口对应的pinctrl,比如PWM2为PWM2_M1,然后使能节点即可。

&pwm2 {
	pinctrl-0 = <&pwm2m1_pins>;
	status = "okay";
};

操作PWM

• 使用 echo 命令将要操作的 PWM 编号 export，注意操作需要root权限。

root@coolpi-4b:/# echo 0 >/sys/class/pwm/pwmchip2/export  
/*export 之后就会生成/sys/class/pwm/pwmchip2/pwm0目录*/
root@coolpi-4b:/sys/class/pwm/pwmchip2/pwm0# ls
capture  duty_cycle  enable  output_type  period  polarity  power  uevent

• 使用 echo 命令设置 PWM 的周期：

echo 1000000 > /sys/class/pwm/pwmchip2/pwm0/period
/*设置PWM一个周期的时间，单位为ns，即一个周期为1KHZ。*/

• 使用 echo 命令设置 PWM 的占空比：

echo 500000 > /sys/class/pwm/pwmchip2/pwm0/duty_cycle
/*设置PWM一个周期中“ON”的时间，单位为ns，即占空比=duty_cycle/period=50%。*/

• 使用 echo 命令使能 PWM

echo 1 > /sys/class/pwm/pwmchip2/pwm0/enable 

@xuweii 支持wifi6频点，但是达不到WIFI6的性能。COOLPI有一个USB3.0可以当作PCIE使用，可以用作扩展WIFI6或者SSD等外设。当然硬件上要做一些修改，如果有动手能力可以尝试。

@xuweii 这颗不支持。