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uVision fails on mixed JTAG chain

Hi there,

i have a board with a Lattice XP2 FPGA and a Cortex-M3 Controller (LPC1778). The devices
are chained on the JTAG (first is FPGA). The FPGA programmer can program the FPGA without
errors. The Microcontroller is shown as a "NOP" device. That's OK. But uVision will fail
to detect the chain.

From debug options i have used the "ULINK cortex debugger". From the settings menu, i can
choose between automatic and manual JTAG configuration. The automatic config will fail
completely with "JTAG Device Chain Error". When selecting the manual config, i can see the
two devices and their JTAG IDCODES. The IDs are OK, but i can not select the Controller
so flashing and debugging over JTAG will not work. The device name fields are empty. I am
using uVision 4.22 and an ULINK.

Regards
Philipp

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