Diff: ADC_BuiltIn.hpp

Revision:

0:46d099dfd9d6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ADC_BuiltIn.hpp	Sat Mar 14 06:49:49 2015 +0000
@@ -0,0 +1,86 @@
+//------------------------------------------------------
+// Class for ADC using TIM2 trigger -- Header
+//
+// 2015/03/14, Copyright (c) 2015 MIKAMI, Naoki
+//------------------------------------------------------
+
+#ifndef ADC_BUILTIN_HPP
+#define ADC_BUILTIN_HPP
+
+#include "mbed.h"
+
+namespace Mikami
+{
+    class ADC_BuiltIn
+    {
+    private:
+        // Following object of AnalogIn class will be
+        // initialized by menber initializer
+        AnalogIn adc_;
+        // Following two objects of AnalogIn class will be
+        // initailized by regular executable statements
+        AnalogIn* adc2_;
+        AnalogIn* adc3_;
+
+        // Channel of ADC1
+        uint8_t ch1_, ch2_, ch3_;
+
+        // Set timer to generate sampling pulse for ADC
+        void SetTim2(int frequency);
+        
+        // Exctract channel number
+        uint8_t GetChannelNumber(PinName);
+
+        // for inhibition of copy constructor
+        ADC_BuiltIn(const ADC_BuiltIn&);
+        // for inhibition of substitute operator
+        ADC_BuiltIn& operator=(const ADC_BuiltIn&);
+
+    protected:
+        // for normalize   
+        static const float AMP_ = 1.0f/2048.0f;
+
+        ADC_TypeDef* const myAdc_;
+
+        // Wait until completion of AD conversion
+        void WaitDone()
+        { while((myAdc_->SR & ADC_SR_EOC) == RESET); }
+
+    public:
+
+        // Constructor
+        //      pin1:       Pin Name for input as A0, A1, etc.
+        //      frequency:  Sampling frequency
+        //      pin2:       If use 2nd channel set this parameter
+        //      pin3:       If use 3rd channel set this parameter
+        ADC_BuiltIn(PinName pin1, int frequency,
+                 PinName pin2 = NC, PinName pin3 = NC);  
+        
+        // Read ADC with waiting, range: [0, 0x0FFF]
+        virtual uint16_t Read_u16()
+        {
+            WaitDone();
+            return myAdc_->DR;   
+        }
+
+        // Read ADC with waiting, range: [-1.0f, 1.0f]
+        virtual float Read()
+        {
+            WaitDone();
+            return AMP_*((int16_t)myAdc_->DR - 2048);
+        }
+
+        // Select channel
+        void Select1stChannel() { myAdc_->SQR3 = ch1_; }
+        void Select2ndChannel() { myAdc_->SQR3 = ch2_; }
+        void Select3rdChannel() { myAdc_->SQR3 = ch3_; }
+        
+        // Software start
+        virtual void SoftStart()
+        { myAdc_->CR2 |= ADC_CR2_SWSTART; }
+        
+        uint32_t ReadSQR3() { return myAdc_->SQR3; }
+    };
+}
+#endif  // ADC_BUILTIN_HPP
+