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Altera_Forum
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13 years ago

How to use two USB blaster cable in the same computer

We want to debug different FPGAs/cplds which are in different JTAG chain at the same time using same computer. And we have several usb blaster cables, but one computer only recognizes one usb cable. ...
Altera_Forum's avatar
Altera_Forum
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13 years ago

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What kinds usb cable do you used? Altera or local cable?

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Terasic USB-Blasters, and USB-Blasters embedded on development kits.

If the USB-Blaster circuit consists of an FTDI FT245BM USB-to-FIFO device, then it has an EEPROM that contains the configuration information. This is what FT_PROG reads, and then allows you to reprogram.

If you are using a Cypress FX2 clone, then you have to replace the fake EEPROM firmware with updated firmware with a new serial number.

Cheers,

Dave