Turn Led on - USB PIC

Ttelmah · Joined: 11 Mar 2010 Posts: 19546

I think the key is his understanding of numbers.

He says he has changed the application to send 0 and 1.
This is wrong....

PCM_programmers application expects to receive ASCII '1' or ASCII '0', which is 0x31, or 0x30 (in hex), or 49/48 in decimal. The application shown, sends _decimal_ values as a byte, so the values need to be changed to 48/49. I think he has changed them to 0 and 1....

nando88 · Joined: 25 Aug 2013 Posts: 28

I just don't understand, what values should I send. In the original application, the values that where being read where 127 & 126. If you see the example, those are the values that are being used. I just don't understand what's the difference between the values that are being read. The other thing is that I can't make it work with java, and should be as easy as following the tutorial, but I can't make it work. Making it work with java is the whole purpose of my project.
Please help me fix this.
Thanks!

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

This is not a Java developer's forum. You want to write a Java application
that can:
1. Call a Windows function and find out what Com port has been assigned
to the USB CDC device.
2. Configure Java to talk to that Com port.
3. Accept user keyboard input to the PC, and then send the keyboard
values to the Com port, which will then be sent (by USB) to the 18F4550
board, to turn on the LED.

We helped you with the PIC side. You need to find a Java forum to help
you with the Java side.