OpenWrt master 运行出错 #10

fanck0605 · 2020-07-14T06:42:42Z

自己用 OpenWrt master 的源码编译的，无法正常启动。
是不是依赖没装全，麻烦大佬看一下。

root@OpenWrt:~# /usr/bin/oled 0 0 1 1 0 60 0 0 0 0 0 0 0 0 0 0 0 1 OPENWRT
I2C: Failed to open device |: No such file or directory
(Main)i2c-2: OOPS! Something Went Wrong

The text was updated successfully, but these errors were encountered:

NateLol · 2020-07-14T07:22:39Z

已merge PR

fanck0605 · 2020-07-14T07:34:08Z

@NateLol
这是似乎是另一个问题😆，那个 pr 只解决了 luci 显示。
看了一下报错，应该是这两行的错误信息。

https://github.com/NateLol/luci-app-oled/blob/master/src/I2C_Library/I2C.c#L271
https://github.com/NateLol/luci-app-oled/blob/master/src/Example_Code/Main.c#L73

NateLol · 2020-07-14T07:39:24Z

ssh上去试试这个

i2cdetect -y 0

看会不会出来3c

没有的话就有可能依赖没安全。

还可以去看是否有这个目录/dev/i2c-0

fanck0605 · 2020-07-14T07:42:26Z

没有 i2c-0，只找到了个 i2c-1

root@OpenWrt:~# i2cdetect -y 0
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory
root@OpenWrt:~# i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --                         
root@OpenWrt:~# ls /dev | grep i2c
i2c-1
root@OpenWrt:~#

@NateLol 应该是我的依赖问题，我再看看

NateLol · 2020-07-14T07:48:28Z

因为这个程序中是写死了的，一定要是/dev/i2c-0

fanck0605 · 2020-07-14T08:26:25Z

jayanta525 的 openwrt 的 kernel config 里一股脑把 i2c 驱动全选了，所以用着没问题。

我用的是 blocktrron 的 openwrt 编译时，需要手动添加 kmod-i2c-xxx

Update link for issue #10

yoyojacky · 2021-09-18T03:39:17Z

Hi, I have same issue, and am using Raspberry Pi CM4 router board.
OS information:

pi@upstest:~ $ ssh [email protected]
The authenticity of host '192.168.1.1 (192.168.1.1)' can't be established.
ED25519 key fingerprint is SHA256:NWZsaa/lvdIosladk3AmESFtMX907u7mhEEw1qZQNAY.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.1' (ED25519) to the list of known hosts.


BusyBox v1.34.0 (2021-09-05 21:52:35 UTC) built-in shell (ash)

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------
 OpenWrt SNAPSHOT, r0-46dec99
 -----------------------------------------------------
=== WARNING! =====================================
There is no root password defined on this device!
Use the "passwd" command to set up a new password
in order to prevent unauthorized SSH logins.
--------------------------------------------------

and I have already compile the kernel with selected i2c driver.

root@OpenWrt:~# dmesg |grep i2c
[    6.937830] i2c /dev entries driver
root@OpenWrt:~# lsmod |grep i2c
i2c_algo_bit           16384  1 i2c_gpio
i2c_bcm2835            16384  0
i2c_dev                20480  0
i2c_gpio               16384  0
i2c_mux                16384  1 i2c_mux_gpio
i2c_mux_gpio           16384  0
i2c_smbus              16384  0
root@OpenWrt:~# /usr/bin/oled 0 0 1 1 0 60 0 0 0 0 0 0 0 0 0 0 0 1 OPENWRT
I2C: Failed to open device |: No such file or directory
(Main)i2c-2: OOPS! Something Went Wrong
root@OpenWrt:~# i2cdetect -y 0
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory
root@OpenWrt:~# i2cdetect -y 1
Error: Could not open file `/dev/i2c-1' or `/dev/i2c/1': No such file or directory

root@OpenWrt:~#  modprobe i2c-dev
root@OpenWrt:~# opkg list | grep i2c
i2c-tools - 4.3-1
kmod-i2c-algo-bit - 5.10.64-1
kmod-i2c-bcm2835 - 5.10.64-1
kmod-i2c-core - 5.10.64-1
kmod-i2c-gpio - 5.10.64-1
kmod-i2c-mux - 5.10.64-1
kmod-i2c-mux-gpio - 5.10.64-1
kmod-i2c-smbus - 5.10.64-1
libi2c - 4.3-1

and what i need to add into the kernel ? Could you please help me out?

fanck0605 · 2021-09-18T03:55:55Z

For NanoPi R2S the following patch needs to be applied to activate i2c-0.

https://github.com/immortalwrt/immortalwrt/blob/e26c0c7b3152c65c4e9eebd92b7ebd961c28711c/target/linux/rockchip/patches-5.4/201-rockchip-rk3328-add-i2c0-controller-for-nanopi-r2s.patch

Raspberry Pi CM4 may also require a similar patch.

I don't know much about this issue either. I'm sorry that I can't be of more help to you.

yoyojacky · 2021-09-18T04:11:36Z

For NanoPi R2S the following patch needs to be applied to activate i2c-0.

https://github.com/immortalwrt/immortalwrt/blob/e26c0c7b3152c65c4e9eebd92b7ebd961c28711c/target/linux/rockchip/patches-5.4/201-rockchip-rk3328-add-i2c0-controller-for-nanopi-r2s.patch

Raspberry Pi CM4 may also require a similar patch.

I don't know much about this issue either. I'm sorry that I can't be of more help to you.

thanks for your reply, and i have tried another way. and it seems works, but it always show "OLED is not working " in LuCI interface in browser.

I have tried to add this dtoverlay=i2c-gpio,i2c_gpio_sda=2,i2c_gpio_scl=3,i2c_gpio_delay_ us=2,bus=1 to /boot/config.txt and reboot my Raspberry Pi CM4.
now, i can detect the oled 0.91 display 's address via i2cdetec -y 1
but it still not working well.

root@OpenWrt:~# i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

when i ran /usr/bin/oled 0 0 1 1 0 60 0 0 0 0 0 0 0 0 0 0 0 1 OPENWRT command to test it still no luck.

yoyojacky · 2021-09-18T09:08:11Z

This program will only use i2c-0, which is written in the source code. If you connect the OLED to i2c-1, you need to modify the source code.

luci-app-oled/src/Example_Code/Main.c

Line 67 in 8607abf

if(init_i2c_dev(I2C_DEV0_PATH, SSD1306_OLED_ADDR) == 0)
  
 
     /* Initialize I2C bus and connect to the I2C Device */
-    if(init_i2c_dev(I2C_DEV0_PATH, SSD1306_OLED_ADDR) == 0)
+    if(init_i2c_dev(I2C_DEV1_PATH, SSD1306_OLED_ADDR) == 0)
     {
         printf("(Main)i2c-2: Bus Connected to SSD1306\r\n");
     }
I2C_DEVx_PATH is defined here

luci-app-oled/src/I2C_Library/I2C.h

Line 42 in 8607abf

#define I2C_DEV0_PATH "/dev/i2c-0"

thanks for your tips, I have already change the test command to :

/usr/bin/oled 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 60 0 1 openwrt 1

and it works.

The key parameters is to change the /boot/config.txt file and add:

dtoverlay=i2c-gpio,i2c_gpio_sda=2,i2c_gpio_scl=3,i2c_gpio_delay_us=2,bus=1

and BTW, need to change the permission of the etc/init.d/oled from 644 to 755. and restart /etc/init.d/oled restart.
and save it, reboot CM4, it will works fine.

NateLol · 2021-09-18T09:47:14Z

Good, thank you both @yoyojacky @fanck0605 for the effort and this great information.

I am linking this in README for other Raspberry Pi CM4 users who might find it helpful.

yoyojacky · 2021-09-24T04:45:37Z

Good, thank you both @yoyojacky @fanck0605 for the effort and this great information.

I am linking this in README for other Raspberry Pi CM4 users who might find it helpful.

Thanks for your effort so that i can use your repo to build my custom router via Raspberry Pi CM4 module, it was so nice to have an oled 0.91 display on my router, thanks a lot ...

daleking · 2024-01-01T02:35:50Z

For the Rpi4/CM4 using the bit-banged kmod-i2c-gpio driver I was seeing 1-2% CPU utilisation from the oled process. strace seemed to indicate this was during write to the driver - makes sense.

I installed kmod-i2c-bcm2835 which is the pi hardware driver which also uses the same pins 2,3 and CPU dropped dramatically.

To enable hardware I2C bus driver for the OLED display if using pins 2,3:

opkg install kmod-i2c-bcm2835
From /boot/config.txt replace:
dtoverlay=i2c-gpio,i2c_gpio_sda=2,i2c_gpio_scl=3,i2c_gpio_delay_us=2,bus=1
with:
dtparam=i2c1=on

After reboot /dev/i2c-1 will be the hardware I2C bus not the bit banged GPIO driver. You should see a 1-2% CPU reduction.

NateLol closed this as completed Jul 14, 2020

NateLol reopened this Jul 14, 2020

fanck0605 closed this as completed Jul 14, 2020

NateLol mentioned this issue Jul 27, 2020

OLED安装后无法启动运行 #18

Closed

NateLol added a commit that referenced this issue Aug 5, 2020

Update README.md

68aae1f

Update link for issue #10

This was referenced Jan 13, 2022

Test 52Pi CM4 Router Board geerlingguy/raspberry-pi-pcie-devices#337

Closed

OLED display requires tweaks before it will function geeekpi/cm4routerboard#3

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OpenWrt master 运行出错 #10

OpenWrt master 运行出错 #10

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OpenWrt master 运行出错 #10

OpenWrt master 运行出错 #10

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