Hi,
I am trying to implement a Nios on my custom board.
The nios is simple:
- external clock 30MHz
- external reset_n (alt_pll_locked signal)
- nios II processor /s
- onchip memory: 131072 bytes
- sysid
- jtag_uart
- pio output 32bit initialize at 0x00000000
- custom driver (avalon mapped slave)
I have checked on the board both clock and reset_n signals (they are use and work for other vhd modules).
I written a simple program: alt_printf("hello") + IOWR(pio_base, 0, 0xFFFFFFFF) to test the nios but it doesn't work. The nios seems to be always in reset state:
-> I can program the nios using "nios2-download -r file.elf" command
-> I can open a jtag uart using nios2-terminal.exe
But both printf() and PIO have no effect on fpga and jtag_uart.
-> sysid and timestamp are "not found" so I can't go in debug mode. I have set BSP_editor settings (no small drivers, boot and run from onchip memory, enable sysid check, set sys_clk_timer, jtag_uart streams...)
I never had this problem before but it is the first nios I build with Quartus 11.1 sp2.
Maybe I forgot something simple but I have no clue :-/
Any idea ?
Thanks for help :-)
seb
I am trying to implement a Nios on my custom board.
The nios is simple:
- external clock 30MHz
- external reset_n (alt_pll_locked signal)
- nios II processor /s
- onchip memory: 131072 bytes
- sysid
- jtag_uart
- pio output 32bit initialize at 0x00000000
- custom driver (avalon mapped slave)
I have checked on the board both clock and reset_n signals (they are use and work for other vhd modules).
I written a simple program: alt_printf("hello") + IOWR(pio_base, 0, 0xFFFFFFFF) to test the nios but it doesn't work. The nios seems to be always in reset state:
-> I can program the nios using "nios2-download -r file.elf" command
-> I can open a jtag uart using nios2-terminal.exe
But both printf() and PIO have no effect on fpga and jtag_uart.
-> sysid and timestamp are "not found" so I can't go in debug mode. I have set BSP_editor settings (no small drivers, boot and run from onchip memory, enable sysid check, set sys_clk_timer, jtag_uart streams...)
I never had this problem before but it is the first nios I build with Quartus 11.1 sp2.
Maybe I forgot something simple but I have no clue :-/
Any idea ?
Thanks for help :-)
seb