Final stm32_pin_info design candidate; ADC3 support on Native.

Added an adc_dev to struct stm32_pin_info.  This was necessary to add
support for the channels on the Native which are only connected to
ADC3, but it does add a bunch of NULLs to the PIN_MAPs.

I don't think any other peripherals need representation on a per-pin
basis.  Each peripheral library will be responsible for keeping track
of related GPIO ports and bits, and we can throw #defines in to
boards/*.h for other things (e.g. BOARD_SPI1_MISO_PIN).

Fleshed out the ADC refactor and brought it more in keeping with the
new design as it evolves.

A couple of other tweaks.  Notably: waitForButtonPress() now takes a
default argument meaning "wait forever".

Removed Maple-specific documentation from core functions in io.h; this
information will need to go into the individual board docs files.

1 files changed, 2 insertions, 2 deletions

diff --git a/libmaple/timer.c b/libmaple/timer.c
index ad0ec6f..a4e4032 100644
--- a/libmaple/timer.c
+++ b/libmaple/timer.c
@@ -189,8 +189,8 @@ void timer_set_mode(timer_dev *dev, uint8 channel, timer_mode mode) {
 }
 
 /**
- * @brief Call a given function on all timers.
- * @param fn Function to call on each timer.
+ * @brief Call a function on timer devices.
+ * @param fn Function to call on each timer device.
  */
 void timer_foreach(void (*fn)(timer_dev*)) {
     fn(TIMER1);