Hobbyist Toolkit

cancel
Showing results for 
Search instead for 
Did you mean: 

LINX communication over serial1 instead of serial

if you want to use UART, I think  you may try to use VISA. I’m using this.

pi4 can use 5 UART, but you shuld change the /boot/config.txt.  

 

****config.txt, add the follow text.

 

enable_uart=1
dtoverlay=uart2
dtoverlay=uart5

 

#******PS: I just use uart2 and uart5, you can add what you want unless it doesn't exist.

 

the uart in GPIO

GPIO14 = TXD0 -> ttyAMA0
GPIO15 = RXD0 -> ttyAMA0

 

GPIO0 = TXD2 -> ttyAMA1
GPIO1 = RXD2 -> ttyAMA1

 

GPIO4 = TXD3 -> ttyAMA2
GPIO5 = RXD3 -> ttyAMA2

 

GPIO8 = TXD4 -> ttyAMA3
GPIO9 = RXD4 -> ttyAMA3

 

GPIO12 = TXD5 -> ttyAMA4

GPIO13 = RXD5 -> ttyAMA4

 

#********************

Here is something you need notice:

 while you change the config.txt, the VISA name(format: ASRL<Number>::INSTR,Number from 0 to n-1,n is the max number of uart you used) is change ,too. And the Number is not equal with above ttyAMA<Number>. You can use VISA-Find Sourse to list the source.

0 Kudos
Message 11 of 12
(169 Views)

Hello, 

Thank you DevinChan for your idea.

This is exactly what I did, I got rid of LINX and used visa in LV side and custom code in the arduino for this project.

Thanks to the contributors

 

Antoine

0 Kudos
Message 12 of 12
(152 Views)