I am trying to upload a program in cortex m4 u sing ulink2. I have connected vcc gnd swdio and swdclk from cortex m4 to jtag 20 pin connector but the com port is not showing on pc. I also supplied power that is vcc gnd from a power source to cortex m4 processor but still no result.Also 3.3 v is not coming from jtag when it is plugged in.Please guide what to do.
"The uLink does not provide power to the target."
That's correct, but ULINK2 can provide VCC power to the JTAG interface if the target doesn't provide it. http://www.keil.com/support/man/docs/ulink2/ulink2_hw_jumpers.htm