Hello again, I'm battling to talk to my FX2 (custom board), under windows. I use the CyAPI interface to the generic USB driver supplied by Cypress. I can set LED's on my board and so on, so I know that my firmware is being downloaded.
I started out trying to make use of pre-written Cypress C files (fx2regs.h, fx2.h etc), and have found a couple bugs in their code. Recently, I have been going through the GnuRadio equivalents and am (sort of) merging the two while only keeping the simple functionality I am aiming for (at this stage a simple IN streaming device using the slave fifo interface) I have a couple of questions on setting this up (or, adapting the USRP/SSRP firmware to work) 1) I don't have an eeprom on my board to store PID/VID, so I am bound to the standard interface settings - will this be a problem? i.e. provided I set up my EP2 to IN, and EP6 to OUT (matching the standard settings wrt buffering etc), can I then just change the device's alternative interface setting to the appropriate one and access these endpoints? 2) I am trying to set up my firmware responses to CONTROL requests over EP0. Looking at the USRP code, I see that USB interrupts are in autovector mode, with a fair bit of code written in assembler. I need to translate this into a form that my Keil uVision compiler will understand, but once I have done this, with the assembler directives (eg isr.asm), the appropriate include and source files, will I need to set anything else up? (I have commented out all gpif or fpga-specific functionality) 3) Also, do I need to explicitly clear HSNAK and perform other house-keeping in the CONTROL ISR's? 4) Finally, the next step after sorting out the EP0 responses will be to make a simple loop-back whereby the FX2 intercepts all OUT packets and sends them back to the host, so that I can be sure that my firmware is ok. Can I simply use ISR's hooked into the endpoint interupts to achieve this? Many thanks again for your help Kalen Watermeyer Send instant messages to your online friends http://uk.messenger.yahoo.com _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
