Advanced LCD programming questions (two LCDs)

VEX V5 General Discussion General Forum
1

Hello All,

Recently I have been working on some "extra" LCD functions, I quickly found that one 2x16 LCD display was not going to have enough space on it. Then I found that RobotC did not have any functions for two LCD displays. I started looking on the internet for ways to use two LCD displays. I found [this thread ](https://vexforum.com/t/programming-two-lcd-displays/30100/1&highlight=displays) that referred me to J. Pearman's LCDLib. I did not find a part in the thread or documentation that told me how to add a second display. How would I add a second display? Advice will be greatly appreciated. Thanks in advance.
2

What do you mean by “how to add” a second display? Which part are you unsure about? James’ code is all there and ready to go. There’s an example on how to use it here.

3

Thanks for the quick reply. I am meaning how to print separate strings on two seperate displays. As an example: One LCD displays whether the “smart motor lib.” is “on” or “off” and the second LCD displays whether I am in “arcade drive” mode or “accel drive” mode. I know how in driver control you can have the code to turn on and off but I did not see how to show the strings on the separate displays. I have seen J. Pearman’s example code.

4

The “normal” ROBOTC LCD display will be connected to uart2. The second LCD display will be connected to uart1.

edit:
I will try and throw an example together tomorrow if I have time.

5

Thank you so much:). So you are saying I do not need to add any extra code to your example.

6

The following code will display “Default screen” on the LCD display plugged into UART2:


displayLCDString(0, "Default screen");

The following code will display “Secondary screen” on the LCD display plugged into UART1:


vexLcdSet(0, "Secondary screen");
7

Ok, so the built in RobotC functions are for the LCD display plugged into UART1 and the LCDLib is for the LCD display plugged into UART2.

8

Flip those and you’ve got it. The built-in RobotC functions are for an LCD display plugged into UART2. James’ vexLcdLib is for an LCD display plugged into UART1.

9

Ok, I started with the idea that the LCDLib printed to both with the same functions:o. Thanks everyone for helping out:).