Forcing a Short Packet using GPIF Master | Cypress Semiconductor
Forcing a Short Packet using GPIF Master
I am using the GPIF Master example from http://www.cypress.com/?rID=84236. I have it working nicely in USB2 for normal MaxPacket Length packets. If I want the DMA/State Machine to send a short IN packet what should I do? I know before hand when the FPGA connected to the GPIF bus will just send a single word to the Cypress and at this point I need to make sure the USB Controller just takes this single word and sends it back as an 4 Byte Short IN Packet going to the PC.
Or could I use a Cypress input from the FPGA to "force" the Cypress to send a short packet with the data it has its buffer?