commit 42a9c91b1a190124c8d16fc8178312d37a2b924d
author Brian Silverman <brians> Fri Mar 29 23:37:46 2013 -0700
committer Brian Silverman <brians> Fri Mar 29 23:37:46 2013 -0700
tree c4e8ff6fa231637fd924bf5d7f57f924b6db6dd1
parent 1289dedfccfe76fcc4f34ec1a39488f1be8ad3d4

trying to follow the processor manual

gyro_board/src/usb/analog.c

diff --git a/gyro_board/src/usb/analog.c b/gyro_board/src/usb/analog.c
index cfcd67d..7a47a2f 100644
--- a/gyro_board/src/usb/analog.c
+++ b/gyro_board/src/usb/analog.c
@@ -160,9 +160,6 @@
 
 // ENC1A 2.11
 void EINT1_IRQHandler(void) {
-  // TODO(brians): need to test this on hardware, but I think this should be
-  // below the EXTPOLAR set
-  SC->EXTINT = 0x2;
   int fiopin = GPIO2->FIOPIN;
   if (((fiopin >> 1) ^ fiopin) & 0x800) {
     ++encoder1_val;
@@ -170,10 +167,10 @@
     --encoder1_val;
   }
   SC->EXTPOLAR ^= 0x2;
+  SC->EXTINT = 0x2;
 }
 // ENC1B 2.12
 void EINT2_IRQHandler(void) {
-  SC->EXTINT = 0x4;
   int fiopin = GPIO2->FIOPIN;
   if (((fiopin >> 1) ^ fiopin) & 0x800) {
     --encoder1_val;
@@ -181,6 +178,7 @@
     ++encoder1_val;
   }
   SC->EXTPOLAR ^= 0x4;
+  SC->EXTINT = 0x4;
 }
 
 // GPIO Interrupt handlers