Merge refactor into i2c-wip:

Squashed commit of the following:

commit 4d6662dadfda7f2fd55107535165dc98a0638a3c
Merge: 174d9ab 7ddc844
Author: Marti Bolivar <mbolivar@leaflabs.com>
Date:   Fri Mar 4 23:18:29 2011 -0500

    Merge remote branch 'origin/refactor' into refactor

commit 174d9ab73cc3387a3812e6f3d3e97519bf5b2150
Author: Marti Bolivar <mbolivar@leaflabs.com>
Date:   Fri Mar 4 23:16:53 2011 -0500

    USBSerial docs fix.

commit f217acb73d94f0a88bf33a42684e6e988dcb3685
Author: Marti Bolivar <mbolivar@leaflabs.com>
Date:   Fri Mar 4 20:25:26 2011 -0500

    Brought examples/ up to date; PIN_MAP bugfix for D24.

commit c4ba3ba05fc39ef260cd80d91759966952df74ae
Author: Marti Bolivar <mbolivar@leaflabs.com>
Date:   Fri Mar 4 19:16:42 2011 -0500

    Cosmetic/documentation changes to adc.c

commit e7747b4eb831621951deef6d31629f55cb5c3500
Author: Marti Bolivar <mbolivar@leaflabs.com>
Date:   Fri Mar 4 19:16:07 2011 -0500

    Cosmetic changes to wirish/main.cxx

commit e2f9d4116e59d8487c936989384228ea084a3501
Author: Marti Bolivar <mbolivar@leaflabs.com>
Date:   Fri Mar 4 19:15:24 2011 -0500

    Untabifying docs/source/conf.py

commit 7ddc84481b4eebe337065a0219e3d8dc000791e5
Author: Perry Hung <iperry@gmail.com>
Date:   Wed Mar 2 00:30:19 2011 -0500

    cscope: Find .S instead of .s files

commit 62cb09ed6357eae58b0234fbc074c44e9c0aa5e5
Author: Marti Bolivar <mbolivar@leaflabs.com>
Date:   Wed Mar 2 00:07:10 2011 -0500

    Fixing typo in main.cpp.example.

1 files changed, 23 insertions, 22 deletions

diff --git a/examples/qa-slave-shield.cpp b/examples/qa-slave-shield.cpp
index b395cca..178b780 100644
--- a/examples/qa-slave-shield.cpp
+++ b/examples/qa-slave-shield.cpp
@@ -1,50 +1,51 @@
-// slave mode for QA shield
+// Slave mode for QA shield
 
 #include "wirish.h"
 
-#define LED_PIN 13
-#define NUM_GPIO 38 // not the number of the max...
+// FIXME generalize for Maple Native, Maple Mini (NUM_GPIO, Mini USB
+// breakout pins, etc.)
 
-int i;
+#define LED_PIN BOARD_LED_PIN
+#define NUM_GPIO 38 // Ignore JTAG pins.
 
-void setup()
-{
+void setup() {
     /* Set up the LED to blink  */
     pinMode(LED_PIN, OUTPUT);
-    digitalWrite(LED_PIN, 1);
+    digitalWrite(LED_PIN, HIGH);
 
-    for(i=0; i<NUM_GPIO; i++) {
-        if(i==13) { continue; }
+    for(int i = 0; i < NUM_GPIO; i++) {
+        if (i == BOARD_LED_PIN) {
+            continue;
+        }
         pinMode(i, OUTPUT);
-        digitalWrite(i,0);
+        digitalWrite(i, LOW);
     }
-    //delay(5000);
     SerialUSB.println("OK, starting...");
-
 }
 
 void loop() {
-    digitalWrite(LED_PIN,1);
+    toggleLED();
     delay(100);
-    digitalWrite(LED_PIN,0);
+    toggleLED();
 
-    for(i=0; i<NUM_GPIO; i++) {
-        if(i==13) { continue; }
-        digitalWrite(i,1);
+    for(int i = 0; i < NUM_GPIO; i++) {
+        if (i == BOARD_LED_PIN) {
+            continue;
+        }
+        togglePin(i);
         delay(5);
-        digitalWrite(i,0);
+        togglePin(i);
         delay(5);
     }
 }
 
 // Force init to be called *first*, i.e. before static object allocation.
-// Otherwise, statically allocated object that need libmaple may fail.
- __attribute__(( constructor )) void premain() {
+// Otherwise, statically allocated objects that need libmaple may fail.
+__attribute__((constructor)) void premain() {
     init();
 }
 
-int main(void)
-{
+int main(void) {
     setup();
 
     while (1) {