05-03-2011 05:15 AM
Hi,we are using the PFL ip core in MAX2 cpld to download the FPGA configuration file to flash and to program the ARRIA2 FPGA. we had a requirement to dowload the configuration file from FPGA in the production without using JTAG.For this we are having the flash programming in FPGA and using SPI interface to CPLD.(we don't have hardware connections from FPGA to FLASH) we need to multiplex the inout data bus between PFL and user flash programming module. The PFL core directly gives inout data bus in the entity.Can we split this data bus to seperate input and output data busses in PFL core, so that we can multiplex the inout data bus between two flash control modules? Thank you, Regards, Ramesh.B
05-03-2011 06:08 AM
Why not? You would preferably implement the changes in pfl.vhd, that is already multiplexing between program and configuration function of the core. But if you don't want to touch the core, you can also add a wrapper.