Tutorial Video: How to boot uClinux on NIOS II Processor with MMU

Hi,

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pio_green_led: BASE = 0x0000_00a0,  END = 0x0000_00af
pio_red_led: BASE = 0x0000_00b0, END = 0x0000_00bf
pio_button: BASE = 0x0000_00d0, END = 0x0000_00df
lcd: BASE = 0x0000_00e0, END = 0x0000_00ef

Is it correct addresses?

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These peripherals are connected to the Nios2 CPU via a "clock bridge". So the correct physical addresses are

pio_green_led: BASE = 0x0800_00a0,  END = 0x0800_00af
pio_red_led: BASE = 0x0800_00b0, END = 0x0800_00bf
pio_button: BASE = 0x0800_00d0, END = 0x0800_00df
lcd: BASE = 0x0800_00e0, END = 0x0800_00ef

.

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Can you give me examples of working with It (for example how to switch on/off leds, use button, e.t.c.)?

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These peripherals are connected via Altera's PIO IP cores, so you can control those only by reading and writing their registers. But to do so in your Linux system, you need appropriate drivers.

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There is also an issue with eth0 interface. It works only in half duplex mode even when i write "ethtool -s eth0 autoneg off speed 100 duplex full ".

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Maybe it's your PC side problem. Please check that your PC's phy is set in autonegotiation mode.

Kazu