Created new test for ADC_Setup() function and wrote code to pass the test.

mocks/MockADC/MockADC.c

@@ -13,6 +13,12 @@
 uint16_t fake_data[FAKESIZE];
 int fake_index = 0;
 
+
+void ADC_Setup(void)
+{
+
+}
+
 void ADC_Init(uint8_t pin_num)
 {
     mock_c()->actualCall("ADC_Init")

mocks/MockADC/MockADC.h

@@ -13,10 +13,8 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-/**
+
- * A function that adds two to a number
+void ADC_Setup(void);     
- * @param a The first argument
- */
 void ADC_Init(uint8_t pin_num);
 void ADC_Enable(uint8_t pin_num);
 void ADC_Disable();

src/ADC/ADC.c

@@ -24,6 +24,27 @@ static bool IsInvalidPin(uint8_t pin_num){
 }
 
 
+void ADC_Setup(void)
+{
+    //Clears control register A for ADC0
+    RegEdit_SetNum((void *) &ADC0.CTRLA, 0x00);
+
+    //Sets The sample accumulation number to 32.
+    RegEdit_SetNum((void *) &ADC0.CTRLB, 0x5);
+
+    //Sets the voltage reference to VDD or VCC.
+    RegEdit_SetBit((void *) &ADC0.CTRLC, 4);
+
+    //Sets the pre-scalar for the adc sample rate.
+    RegEdit_SetBit((void *) &ADC0.CTRLC, 2);
+
+    //Setup an Initalization delay.
+    RegEdit_OR_Num((void *) &ADC0.CTRLD, (2<<5));
+
+    //Set the bit for ADC variation during readings.
+    RegEdit_SetBit((void *) &ADC0.CTRLD, 4);
+}
+
 void ADC_Init(uint8_t pin_num)
 {
     
@@ -54,6 +75,8 @@ void ADC_Init(uint8_t pin_num)
     //Use VDD as our voltage refernce.
     //RegEdit_SetBit((void *) &ADC0.CTRLC, 4);
 
+    //We setup the ADC to take 32 samples.
+    //RegEdit_OR_Num((void *) &ADC0.CTRLB, 0x5);
 }
 
 
@@ -88,8 +111,6 @@ uint16_t ADC_ReadValue_Impl(uint8_t pin_num)
     RegEdit_SetNum((void *) &ADC0.COMMAND, ADC_STCONV_bm);
 
     /* Wait until ADC conversion done */
-    //while ( !(ADC0.INTFLAGS & ADC_RESRDY_bm) )
-    //while(!(RegEdit_IsBitSet((void *) &ADC0.INTFLAGS, ADC_RESSEL_bm)))
     while ( !(ADC0.INTFLAGS & ADC_RESRDY_bm) )
     {
         ;
@@ -97,8 +118,10 @@ uint16_t ADC_ReadValue_Impl(uint8_t pin_num)
    
     /* Clear the interrupt flag by writing 1: */
     ADC0.INTFLAGS = ADC_RESRDY_bm;
- 
+    
-    return (uint16_t) ADC0.RES;
+    uint16_t adc_val = (uint16_t) ADC0.RES;
+    adc_val = adc_val >> 5;
+    return adc_val; 
 }
 
 

src/ADC/ADC.h

@@ -53,5 +53,16 @@ void ADC_Disable();
  */
 extern uint16_t (*ADC_ReadValue)(uint8_t pin_num);
 
+/**
+ * @brief Sets up the ADC
+ *
+ * This function sets up the ADC to take and accumulate 32 samples. It also
+ * sets the inital delay to 32 ADC clock cycles, and sets the VREF to VDD or
+ * VCC.
+ *
+ * This function should only need to be called once.
+ */
+void ADC_Setup(void);     
+
 
 #endif //ADC_H   

tests/ADC/test_ADC.cpp

@@ -47,6 +47,41 @@ static void ADCStoresPortState(void){
         .andReturnValue(0xFF);
 }
 
+TEST(test_ADC, ADC_SetupSetsRegisters)
+{
+    //Clears control register A for ADC0
+    mock().expectOneCall("RegEdit_SetNum")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLA)
+        .withUnsignedIntParameter("num", 0x00);
+
+    //Sets The sample accumulation number to 32.
+    mock().expectOneCall("RegEdit_SetNum")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLB)
+        .withUnsignedIntParameter("num", 0x5);
+
+    //Sets the voltage reference to VDD or VCC.
+    mock().expectOneCall("RegEdit_SetBit")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLC)
+        .withUnsignedIntParameter("bit_num", 4);
+
+    //Sets the pre-scalar for the adc sample rate.
+    mock().expectOneCall("RegEdit_SetBit")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLC)
+        .withUnsignedIntParameter("bit_num", 2);
+
+    //Setup an Initalization delay.
+    mock().expectOneCall("RegEdit_OR_Num")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLD)
+        .withUnsignedIntParameter("num", (2<<5));
+
+    //Set the bit for ADC variation during readings.
+    mock().expectOneCall("RegEdit_SetBit")
+        .withPointerParameter("reg", (void *) &ADC0.CTRLD)
+        .withUnsignedIntParameter("bit_num", 4);
+
+    ADC_Setup();     
+}
+
 TEST(test_ADC, ADC_InitPortAPin7UsesCorrectRegisters)
 {
     ADCStoresPortState();
@@ -92,6 +127,7 @@ TEST(test_ADC, ADC_InitPortAPin0UsesCorrectRegisters)
         .withPointerParameter("reg", (void *) &PORTA.PIN0CTRL)
         .withUnsignedIntParameter("bit_num", PORT_ISC_INPUT_DISABLE_gc);
 
+
     ADC_Init(0);
 }