Split out ADC code into a separate file for pistol grip

Change-Id: Ie6401ef3fbfd1c33f7e46532a9624acb78a97bc6
diff --git a/motors/pistol_grip/controller_adc.cc b/motors/pistol_grip/controller_adc.cc
new file mode 100644
index 0000000..498c4e2
--- /dev/null
+++ b/motors/pistol_grip/controller_adc.cc
@@ -0,0 +1,100 @@
+#include "motors/pistol_grip/controller_adc.h"
+
+#include "motors/peripheral/adc.h"
+
+namespace frc971 {
+namespace motors {
+
+void AdcInitSmall() {
+  AdcInitCommon();
+
+  // M0_CH0F ADC1_SE17
+  PORTA_PCR17 = PORT_PCR_MUX(0);
+
+  // M0_CH1F ADC1_SE14
+  PORTB_PCR10 = PORT_PCR_MUX(0);
+
+  // M0_CH2F ADC1_SE15
+  PORTB_PCR11 = PORT_PCR_MUX(0);
+
+  // M0_ABS ADC0_SE5b
+  PORTD_PCR1 = PORT_PCR_MUX(0);
+
+  // M1_CH0F ADC0_SE13
+  PORTB_PCR3 = PORT_PCR_MUX(0);
+
+  // M1_CH1F ADC0_SE12
+  PORTB_PCR2 = PORT_PCR_MUX(0);
+
+  // M1_CH2F ADC0_SE14
+  PORTC_PCR0 = PORT_PCR_MUX(0);
+
+  // M1_ABS ADC0_SE17
+  PORTE_PCR24 = PORT_PCR_MUX(0);
+
+  // WHEEL_ABS ADC0_SE18
+  PORTE_PCR25 = PORT_PCR_MUX(0);
+
+  // VIN ADC1_SE5B
+  PORTC_PCR9 = PORT_PCR_MUX(0);
+}
+
+SmallAdcReadings AdcReadSmall0(const DisableInterrupts &) {
+  SmallAdcReadings r;
+
+  ADC1_SC1A = 17;
+  while (!(ADC1_SC1A & ADC_SC1_COCO)) {
+  }
+  ADC1_SC1A = 14;
+  r.currents[0] = ADC1_RA;
+  while (!(ADC1_SC1A & ADC_SC1_COCO)) {
+  }
+  ADC1_SC1A = 15;
+  r.currents[1] = ADC1_RA;
+  while (!(ADC1_SC1A & ADC_SC1_COCO)) {
+  }
+  r.currents[2] = ADC1_RA;
+
+  return r;
+}
+
+SmallAdcReadings AdcReadSmall1(const DisableInterrupts &) {
+  SmallAdcReadings r;
+
+  ADC0_SC1A = 13;
+  while (!(ADC0_SC1A & ADC_SC1_COCO)) {
+  }
+  ADC0_SC1A = 12;
+  r.currents[0] = ADC0_RA;
+  while (!(ADC0_SC1A & ADC_SC1_COCO)) {
+  }
+  ADC0_SC1A = 14;
+  r.currents[1] = ADC0_RA;
+  while (!(ADC0_SC1A & ADC_SC1_COCO)) {
+  }
+  r.currents[2] = ADC0_RA;
+
+  return r;
+}
+
+SmallInitReadings AdcReadSmallInit(const DisableInterrupts &) {
+  SmallInitReadings r;
+
+  ADC0_SC1A = 5;
+  while (!(ADC0_SC1A & ADC_SC1_COCO)) {
+  }
+  ADC0_SC1A = 17;
+  r.motor0_abs = ADC0_RA;
+  while (!(ADC0_SC1A & ADC_SC1_COCO)) {
+  }
+  ADC0_SC1A = 18;
+  r.motor1_abs = ADC0_RA;
+  while (!(ADC0_SC1A & ADC_SC1_COCO)) {
+  }
+  r.wheel_abs = ADC0_RA;
+
+  return r;
+}
+
+}  // namespace motors
+}  // namespace frc971