flash boot problem

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flash boot problem

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HI all,

I am a NIOSII beginner. i have built a niosii system and want to build a program on the Cyclone II2C35 kit and burn the soft program in the CFI flash,the fpga configure data in the epcs.

Hardware:

I integrated niosii CPU,PIO,tri-avalon-bridge,ext-flash(CFI),on-chip-ram,epcs-controller,jatg-uart.

the reset address is 0x0(ext-flash)

the exception address is point to on-chip-ram

Software:

i just use the binary-count demo program in the NIOSII IDE.i set .text .rodata all to on-chip-ram.

problem:

i can run the program very well when power on ,but after i use the flash programmer to program the software data on the flash on the address(0x0),the FPGA configure data on the epcs.After power on, the NIOSII system have load into the FPGA(the user led is on,and i have run a program to test it ).but the softeware have not boot from the flash.

could somebody tell me what wrong?

thanks a lot!

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