Details: I want to use some of the pins on the 40-pin connector as GPIO to implement a JTAG interface. Specifically, I would like to use TIN1, TIN2, DTOUT3, and IRQ7. Examining the GPIO chapter of the Freescale manual seems to imply that DTOUT3 is not available as a GPIO, and is unclear about IRQ7. However, the file pins.cpp in \Nburn\PK70\system clearly supports using all four pins as GPIO, which is obviously good news - if true. In there, registers from other parts of the processor are used. So it appears more of the 626 page Freescale manual needs to be understood, eh?
![Wink ;)](./images/smilies/icon_e_wink.gif)
So I'm just asking for confirmation that pins.cpp can be trusted in general, and specifically, that TIN1, TIN2, DTOUT3, and IRQ7 can indeed be used as GPIO. Granted, I will soon enough find out for myself one way or another as I write the code, but it would be helpful to remove a few of the unknowns (e.g. new software, new I/O code, custom hardware, etc.) before I begin!
Thanks!
-Bob