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connecting TOUCHSCREEN AND pic16F877a

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slurp

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I purchased a Panasonic Programmable Display (GT01) whic is a touchscreen device.

I would like to to connect it to a PIC16F877a.

Q1) how can i do that?

the concept is for communication between the 16F877a and GT01.
With 16F877a as the domain controlling (sending data) to the GT01 and display it out.

Please help me. I don't know what suitable protocol to use for this. USART? UART? I2C?

Moreover, the cables that are attached to the GT01 are rs232 and rs232C.

Q2) if I do not use that specific model GT01. Are there any other touchscreen connection with 16F877a projects being done before?

Hope to hear from kind electro-techians soon.

cheers,
slurp
 

Did you have the manual or datasheet? Can I see it?

If that have RS232 port, I think it's maybe use Modbus Protocol. I expect only, since I don't read the manual yet.
 

The touchscreen manual shows connecting to PLC. I sure, it can connect to PIC using Modbus Protocol coding.
 

engshahrul said:
The touchscreen manual shows connecting to PLC. I sure, it can connect to PIC using Modbus Protocol coding.
Click to expand...

Hi engshahrul. Glad to receiver your reply.

hmm..Modbus? Never heard of it...but I am reading up on it.
https://www.modbus.org/docs/Modbus_Application_Protocol_V1_1b.pdf

You seem certain that I can connect my PIC16F877a with the touchscreen module using MODBUS PROTOCOL.

Q1) May I know how does 16F877a support or enable this protocol?
Q2) Do notice that the 16F877a supports USART and MSSP (SPI and I2C).
So, which type of communication does the Modbus Protocol falls in?

May you kindly add on some supportive materials?

Deeply Appreciated.

cheers,
Slurp
 

The touch screen manual said, it's provide RS232 and RS485 port. So, it communicates with UART Module in microcontroller.
You use hardware MAX232 or MAX485 to convert the signal UART and connect to the touch screen.
 

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