From: Bohnens Carsten <c.bohnens_at_tu-bs.de>
Date: Wed, 13 Feb 2013 10:41:27 +0100

Hey,

According to the Datasheet linked in the Wiki, the SoC used in the Sansa
Clip+ has an SPI/SSP Port. I already checked that its balls are not muxed
with any GPIO pins or other peripherals. Has anybody ever tried to map all
the pins that are broken out SOMEWHERE on the PCB? Or tried to identify the
remaining few ICs on the board? I would be grateful for any additional
documentation on the available hardware features. If there is none, I will
start probing myself maybe next weekend and see what I can find.

Another thought that crossed my mind was using the µSD-pins for SPI, but
 unfortunately the way I read the datasheet this would mean bit-banging
 everything.

I'm currently looking for a way to interface one of those cheap 2.4Ghz
Transcievers from Nordic Semi
 (http://www.nordicsemi.com/eng/Products/2.4GHz-RF/nRF24L01P) to an ARM
 system capable of Audio Playback/Recording. My first shot was using an
 STM32F4-DISCOVERY board, but the open source tools available for on-chip
 debugging are so far pretty cumbersome to use (wierd stepping when hitting
 branches), so my eye fell on my trusty Sansa Clip+ I have been using for
 some years (running Rockbox of course ;) ).

If there are other (preferably cheap!) ARM-Based players out there that have
 SPI accessible in some way, I would be glad for a pointer, too.

Thanks for any help!
Received on 2013-02-13