Serial interface using GPIF II | Cypress Semiconductor
Serial interface using GPIF II
We are having problems making the FX3 read and write data in serial mode (data out + data in + PCLK) through GPIF interface. We followed the instructions given in another forum post http://www.cypress.com/?app=forum&id=167&rID=75590, where the 14th bit of the CY_U3P_PIB_GPIF_CONFIG was advised to be set high and changed the CY_U3P_PIB_GPIF_SERIAL_OUT_CONFIG appropriately. But it doesn’t seem to work. As a starting point we modified the example program "gpiftousb" to be "usb to gpif" and included modifications suggested in the post above. The 8 bit configuration works fine, but 1-bit (only data out) configuration doesn’t seem to work. Basically no data coming from the DQ15. Could someone possibly point in the right direction what else needs to be modified to make it work. We attached the GPIF include file before and after serial communication modification.
Sebastian and Dima