[danattherock]

#2727

Hello,

I want to use the Stone communication board with display. When I choose to use RS232, the display works fine. I can send a command and receive a response from the touch screen.

However, when I select TTL (see photo), I can send a command but the touch screen response does not work. When using the touch screen, I receive a 0x00 message. Here, the difference between RS232 and TTL communication is just the jumper for R601 (see photo) and I use the same software, cable, commands, power supply, everything is the same as when I select RS232.

Can you help me?

[Fiona Liu]

#2729

Hello,

From the picture, it looks like your connection is correct. Please check the baud rate. Is it 115200?

I did a check on your project. I switched the screen to TTL and sent commands to it. The returned message is correct.

Please check if the baud rate is 115200 first. if it still doesn’t work, please contact me.

 

[danattherock]

#2734

Hi, I am using 115200 baud rate (see photo 1). To send commands, using either TTL or RS232 works, but the problem is the response of the touch screen. When I use RS232, it works fine, but when I use TTL configuration, it doesn’t work.

One more thing, when I use P1 connector to select external power (see photo 2), the touch screen responds with 0x00, but when I use P1 to select USB, the response is “56 D5 D8 D7 FF F7 3B 17 97 FD 83 75 57 6D 1B” (button pressed) and “56 D5 D8 D7 FF F7 3B 17 97

FB 83 75 57 E5 1B” (cancel button). In both cases the return is incorrect, but the display gives me a different response depending on what input power is selected.

I tried two monitors here that showed the same problem. I tried to command with a microcontroller and had the same touch response, I could send a command but the touch response was 0x00.

Can you help me?

[danattherock]

#2735

I have one more question, is it possible to control the buzzer of the display via Rs232 and TTL? If it is possible, can you give me a command?

[Fiona Liu]

#2736

Hello,

1- About the buzzer control, this function is not open now.

2- About the P1 connector, it doesn’t need to be changed normally. Please switch it to PWR and it should work.

3- About the error response. Please try this serial port debugging software, download link is as follows: https://www.stoneitech.com/media/upload/Download/Software%20%26%20Driver/UART%20Communication%20Software%20-% 20SSCOM32.rar

I tried this software and it worked fine. I pressed the button and received two replies correctly. So please try this software first to see if the problem is caused by the serial debugging software.

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