bsodmike
New Member
Hello all,
I've gotten to the point where I can see some data coming off the PS/2 interface (with respect to the mouse) and according to the page by Adam Chapweske, bits 4 and 5 on the first received byte tell you the direction in which the mouse is moving. Actually this is the 9th bit, i.e.:
hence a 9 bit 2's complement integer.
So as a test I had my PIC test these 2 bits for X/Y and display it on an LCD:
**broken link removed**
The annoying part comes here - it sits @ showing '+' only, which means that both bits are 0 and this is confusing.
To try and help me sort this out I've developed a little program in python (with GUI) which will grab these packets via RS232 and display it on screen and log the data to a log file.
Any ideas at all would be greatly appreciated. Oh, I'm using unsigned chars to store them as well (on the PIC, in C at least).
Cheers, Mike
I've gotten to the point where I can see some data coming off the PS/2 interface (with respect to the mouse) and according to the page by Adam Chapweske, bits 4 and 5 on the first received byte tell you the direction in which the mouse is moving. Actually this is the 9th bit, i.e.:
Code:
8 7 6 5 4 3 2 1 0
-255 128 64 32 16 8 4 2 1hence a 9 bit 2's complement integer.
So as a test I had my PIC test these 2 bits for X/Y and display it on an LCD:
**broken link removed**
The annoying part comes here - it sits @ showing '+' only, which means that both bits are 0 and this is confusing.
To try and help me sort this out I've developed a little program in python (with GUI) which will grab these packets via RS232 and display it on screen and log the data to a log file.
Any ideas at all would be greatly appreciated. Oh, I'm using unsigned chars to store them as well (on the PIC, in C at least).
Cheers, Mike