Hi,
We are trying to use Pixy with the ALTERA fpga named Cyclone 2.
Everything with Pixy works, and by that i mean we can configure it with usb through windows.
But when we start getting data from the uart the first word we get is: 0x55AB instead of 0x55AA as wrriten in the porting guide.
Also, When Pixy doesn’t find any block it sends 0xFFFFF until he finds one again.
Anyone familiar with this issue?
Thanks in advance.
yoni.
Hello Yoni,
Hmm, 0x55AB sort of seems like your timing is a little off. 
Are you using UART or SPI communications?
If you’re using UART, I’d try reducing the baud rate and see if that helps, just as a test.
Regarding the extra 0xffff words, this doesn’t sound familiar.
Edward
Timing is not the case since it’s consistent each time pixy start to send data about blocks.
Changing baud rate wont help either.
And we use uard by choosing 3 in the “data output” option on PixyMon.
But thanks anyway.
It would appear that for our implemantation all we need to know is if a block exists.
So, for now it will do.
hello
I have the same problem with you,did you find the solution yet?can you tell me how to deal with it?
Jason Zou
does anybody know what’s going on ?my project has been postpone by this problem for 2weeks
Hello Jason,
You are using an Altera FPGA with Pixy also?
Edward