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Whether uDMA is supported in SYS/BIOS?

I want to run the UART with uDMA accessing in SYS/BIOS 6.33.4.39 on Concerto.

 The attached file can run without SYS/BIOS and output data to PC just after call the InitUART0Transfer(). But it can't output data when I put it into the SYS/BIOS project.

How can I make the UART with uDMA accessing workable in SYS/BIOS? (My device is Concerto Control Card, and the SYS/BIOS I'm using is V6.33.04.39.)0804.udma_demo_m3.zip7776.udma_uart.c