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, 5 insertions, 4 deletions

diff --git a/wirish/wirish_analog.cpp b/wirish/wirish_analog.cpp
index 9e99aa5..8756caf 100644
--- a/wirish/wirish_analog.cpp
+++ b/wirish/wirish_analog.cpp
@@ -31,11 +31,12 @@
 #include "io.h"
 
 /* Assumes that the ADC has been initialized and that the pin is set
- * to ANALOG_INPUT */
-uint32 analogRead(uint8 pin) {
-    if(PIN_MAP[pin].adc_channel == ADCx) {
+ * to INPUT_ANALOG */
+uint16 analogRead(uint8 pin) {
+    const adc_dev *dev = PIN_MAP[pin].adc_device;
+    if (dev == NULL) {
         return 0;
     }
 
-    return adc_read(ADC1, PIN_MAP[pin].adc_channel);
+    return adc_read(dev, PIN_MAP[pin].adc_channel);
 }