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Altera_Forum's avatar
Altera_Forum
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20 years ago

allocating pipe in sopc(compactflash)

when I design the socket between up3 board and compactflash, because the compactflash works in TRUEIDE mode ,so I directly attached the atasel_n pin to GND. rfu and we_n pin to VCC,and I don't allocate pipe to the reset,power pin in sopc . is it ok????????

I find the example of sopc in our forum ,they all allocate pipe to the power pin

"The Compact Flash controller peripheral includes a configurable power register used to power-cycle Compact Flash cards in Nios II software through a MOSFET on the Nios development boards. However, in certain development boards, power to the Compact Flash card will not be turned off completely during this power-cycle operation. Because of this, the "ATASEL_N" pin may not be sampled during the power-cycle operation after FPGA configuration when this pin is driven to ground. Instead, "ATASEL_N" may be sampled by the Compact Flash card when power is first applied to the development board, when I/O are not yet driven by the FPGA (before FPGA configuration)."

" a configurable power register " is " power "pin in sopc????

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    Hello,

    On our *NIOS* development boards (not UP3), the "cf_power" pin in the hardware example designs goes to a small mosfet on the board which turns power to the CF socket on/off. It acts as a "power switch".

    I do not know how the UP3 board is designed for this; you should carefully study the board schematic to see how things are setup, and change the design accordingly if things are different.
  • Altera_Forum's avatar
    Altera_Forum
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    20 years ago

    yesterday,we change to use ep2c35 board

    and i use the test code from niosforum

    the result is :

    IDE_initialize(): error: verify fail: wrote 0x0, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x1, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x2, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x3, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x4, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x5, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x6, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x7, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x8, read 0xFF

    IDE_initialize(): error: verify fail: wrote 0x9, read 0xFF

    IDE_initialize(): error: failed register write/readback test.

    Cannot initialize IDE device.

    why?

    and when i read every regisiter ,the result all is 0xff.

    though I write other figure to regisiter first!!!!!!!!!!!!!!!!!!!!!!!!!!

    why/??????????