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Its very helpful if anybody gives a tip about how to write a program in ( uvison) to convert usb signals to JTAG signals using microcontroller (Cypress CY7XX series). The JTAG signals r for debugging the DSP chip.
Shobha Poojary asked exactly the same question only the other day: http://www.keil.com/forum/docs/thread4061.asp Why do you need a microcontroller to do this? You will need PC to software to send the USB signals anyway, so why add extra software in a microcontroller - especially as you don't know how to do it?! Like I said before, why not just use a simple USB-to-parallel converter? The ones from FTDI are available as fully built & tested modules, and come complete with Windows drivers - you can either drive them as a virtual COM: Port, or there's a direct device driver http://www.keil.com/forum/docs/thread4061.asp
Here's some reading for you on JTAG: http://www.8052.com/forum/read.phtml?id=60454