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Altera_Forum's avatar
Altera_Forum
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16 years ago

How to use a custom component

Hi, My teacher asks me to write directly from NIOS in the memory of chip. The addresses of the chip are multiplexed and the ports are bidir. I have written a state machine in vhdl and creat...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

ok,

I'm always on my robotic project.

We need to load maps and photos in the robot by plugging a USB Key.

At the beginning I would use a FTDI chip for controlling the USB, but in my school we have a lot of Phillips ISP1581 so I didn't have the choice...

The datas and the addresses are multiplexed on this chip.

The datasheet is here if you need it : visit my website (http://pdfdata.datasheetsite.com/pdf1/philips/isp1581.pdf)

I need from nios to write and read in registers of this chip. For example the scratch register which is located at the address 0x78.

I cannot use PIOs, my teacher doesn't want because they aren't enough fast.

Do you have an idea ?

Thank you