How enable UART 7 on Banana PI M

Banana Pi BPI-M1/BPI-M1+/BPI-R1
1

We are trying to use UART7 which is located at J12. Trying to connect using minicom but it always shows offline. I was told to disable gpio pin in script file but not sure which pins to be disabled.

Any help would be appreciated.

Thanks Sudhir

2

Hi, chances are that it could have been overwritten by GPIO PIN (PI20, PI21). You could remove the following 2 PINs, and then compile with tools.

Remove

gpio_pin_6 = port:PI21 gpio_pin_12 = port:PI20

Tools http://linux-sunxi.org/Sunxi-tools

bin2fex This is a copy of sunxi-fexc which takes a script.bin and dumps the .fex text. fex2bin This is a copy of sunxi-fexc which takes the .fex text file and dumps the binary.

3

I have checked fex file but they are not matching with the one in my system. Please the my fex file

4

By the way we are using Raspbian OS

5

HI: I’ve seen your file, all you need is to remove the codes as follows:

gpio_pin_20 gpio_pin_21 gpio_pin_29 gpio_pin_31

6

I have removed the mentioned pins and build script file. Copied into /boot/bananapi/. Then tried to connec URAT7 using minicom -b 9600 -D /dev/ttyS3

In minicom it shows offline. Do I need to check for any other logs why it is not connected.

7

HI: Please modify Baudrate: 9600 ->115200

minicom -b 115200 -D /dev/ttyS3

8

No luck. Please see the boot log. Does it look good

9

HI: I still don’t know what you want to do . :expressionless:

If you went to use UART3 .you can reference it .

Turn on: [uart_para3] uart_used = 1