i'm ready to order the audiostix2. i need to know if the 38 GPIO pins are directly accessible via memory address and/or the i2c module will be freely available (not used by something like bluetooth, cfstix, or something else).
here's what i understand, and what i don't know about the audiostix2:
10 UCB1400-GPIO lines - accessible through /proc/blah. slow.
TTL serial ports - FFUART is the console (ttyS0). HWUART (ttyS3) is in use by bluetooth (remapping bluetooth to ttyS1 disables cfstix, which i need), and BTUART (ttyS1) is in use by bluetooth. thus no serial interfaces are available. that leaves STUART (ttyS2) as the only free serial port, correct?
38 PXA-GPIO lines - do i have direct access to these memory address? could i just connect a PWM accelerometer lines up to some of these lines and read them directly?
PXA-I2C lines - maybe the best way to access high speed peripherals.