Diff: F446_ADC.hpp

Revision:

0:c945b4fe9a48

Child:

1:6b9f2af6613d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/F446_ADC.hpp	Fri Nov 11 06:28:48 2016 +0000
@@ -0,0 +1,58 @@
+//----------------------------------------------------------
+//  Simultanuous AD Conversion by polling using
+//  ADC2 and ADC3 on STM32F446 ---- Header
+//
+//  STM32F446 の ADC2, ADC3 を使って同時に AD 変換を開始し，
+//  ポーリングによりアナログ信号を入力するクラス（ヘッダ）
+//      A0 (PA_0) :  ADC2 CH0
+//      A1 (PA_1) :  ADC3 CH1
+//
+//  2016/11/10, Copyright (c) 2016 MIKAMI, Naoki
+//----------------------------------------------------------
+
+#include "mbed.h"
+
+#ifndef STM32F446xx
+#error Select STM32F446.
+#endif
+
+#ifndef F446_ADC_DUAL_HPP
+#define F446_ADC_DUAL_HPP
+
+namespace Mikami
+{
+    class AdcDual
+    {
+    public:
+        // Constructor
+        //      frequency: 標本化周波数
+        explicit AdcDual(int frequency);
+
+        // -1.0f <= data1, data2 <= 1.0f
+        virtual void Read(float &ad1, float &ad2);
+
+        // 0 <= data1, data2 <= 4095
+        virtual void Read(uint16_t &ad1, uint16_t &ad2);
+
+    protected:
+        float ToFloat(uint16_t x)
+        {   return AMP_*(x - 2048); }
+    
+    private:
+        static const float AMP_ = 1.0f/2048.0f;
+        static const uint32_t EOC23_ = ADC_CSR_EOC2 | ADC_CSR_EOC3;
+        
+        // AD 変換が完了するまで待つ
+        void WaitDone()
+        {   while((ADC->CSR & EOC23_) != EOC23_); }
+
+        // AD 変換器の外部トリガに使うタイマ (TIM8) の設定
+        void SetTim8(int frequency);
+
+        // for inhibition of copy constructor
+        AdcDual(const AdcDual&);
+        // for inhibition of substitute operator
+        AdcDual& operator=(const AdcDual&);     
+    };
+}
+#endif  // F446_ADC_DUAL_HPP
\ No newline at end of file