Hello, I am working on my hardware consist of EZUSB-FX2 USB2.0 controller chip.I am using Keil IDE as developement environment. I hava modified Descr.A51 file where all the informations related with USB descriptor are defined. Now the problem begins I have entered dw b404H ;; Vendor ID dw 1386H ;; Product ID in descr.A51 file. My problem is in the line one "dw b404H " during compilation it gives the error "ERROR A45-- Undefined Symbol- PASS 2" I do not know why this problem is coming. If I change the first nibble "b" with any value starting from 0 to 9, it works but it is not accepting any value starting from "a to f" Can any body tells me that what is the problem I am using compiler version C51 V6.10. Thanks Shikha
"Can any body tells me that what is the problem" As the others have already identified, the problem is that you have omitted to read the manual! May I suggest that you do so now, and thus save yourself from further embarassment by falling into other well-documented traps! ;-)