USB Audio on L1 TFQ48

[dirk1980]

Hello,
i'm trying to build the USB Audio to work on a L1 TFQ48.

I change some Pins but now i have the problem that i can't change the main_clock (codec.xc).

USB Reset : X0D53 -> Port32A.4
MLCK_SEL: X052 -> Port32A.3
The Codec and LED stuff is deleted.

When i now try to read and write Port 32A nothing is happen.

tmp = port32A_peek(); // tmp is always 0
port32A_out(portval | tmp); // portval is 16 or 24

But the Pin is not changing.
Can somebody help me?

Dirk

[segher]

Try

Code: Select all

port32A_out((tmp & ~24) | portval);

...on the other hand. You say the value returned by peek is always zero,
so either your GPIO from port 32A is not routed to the pin (that happens
if a higher priority port is enabled on that pin), or something external to
the xcore is pulling the signal down.

[dirk1980]

i don't know why the debugger is showing me tmp with 0, it can't be zero.

I have change my code to:
//tmp = port32A_peek(); // tmp is always 0
port32A_out(portval); // portval is 16 or 24

and now it is working. Why? I don't know.

Dirk