I remapped the ARM and try to print a string on an UART by using the PDC. But the PDC prints only 0x00 values. If I print from 0x300000 it works.

The PDC remap bit is set in the matrix.

Has anybody an idea what I do wrong?

Hi Peter,

I have exactly the same problem with AT91SAM9G20. Following your lead on your e-mail I copied the contents of my transmit buffer to 0x00300000 and then pointed the US0 PDC to it and it works!

I hooked an oscilloscope to TXD0 and the USART0 really spits a series of zeroes instead of my buffer contents. The timing of the waveform is correct, but the byte sent is always zero.

I'll try to contact Atmel directly to see what they can do. I don't think that 2 different people working with 2 different processors would get exactly the same problem without seeing each other codes.

(Nestor)