Diff: F446_DAC_Single.hpp

Revision:

0:2a5690e56a16

diff -r 000000000000 -r 2a5690e56a16 F446_DAC_Single.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/F446_DAC_Single.hpp	Tue Feb 21 00:40:10 2017 +0000
@@ -0,0 +1,63 @@
+//--------------------------------------------------------
+//  Class for buit-in single DAC on STM32F446 ---- Header
+//      TIM3 is used for clock to external SCF
+//
+//  STM32F446 内蔵の DAC 用のクラス（ヘッダ）
+//      TIM3 を外付けの SCF のクロックとして使用
+//      A2  (PA_4)： 左 ---- デフォルト
+//      D13 (PA_5)： 右
+//
+//  2017/02/21, Copyright (c) 2017 MIKAMI, Naoki
+//--------------------------------------------------------
+
+#include "mbed.h"
+
+#ifndef STM32F446xx
+#error Select NUCLEO-F446RE.
+#endif
+
+#ifndef F446_DAC_SINGLE_HPP
+#define F446_DAC_SINGLE_HPP
+
+namespace Mikami
+{
+    class DacSingle
+    {
+    public:
+        // Constructor
+        DacSingle(PinName pin = A2);
+
+        virtual ~DacSingle() {}
+
+        // -1.0f <= data <= 1.0f
+       void Write(float data) { WriteDac(ToUint16(data)); }
+
+        // 0 <= data1<= 4095
+        void Write(uint16_t data) { WriteDac(__USAT(data, BIT_WIDTH_)); }
+        
+        // Set TIM3 for clock of switched-capacitor filter
+        void ScfClock(uint32_t clock);
+
+    private:
+        void (DacSingle::*fpWriteDac)(uint16_t);
+
+        static const int BIT_WIDTH_ = 12;
+        AnalogOut da_;
+
+        // Write single-channel data
+        void WriteDac1(uint16_t val);
+        void WriteDac2(uint16_t val);
+        
+        void WriteDac(uint16_t val) { (this->*fpWriteDac)(val); }
+
+        // Saturate float to an unsigned 16-bit value
+        uint16_t ToUint16(float val)
+        {   return __USAT((val + 1.0f)*2047.0f, BIT_WIDTH_); }
+
+        // for inhibition of copy constructor
+        DacSingle(const DacSingle&);
+        // for inhibition of substitute operator
+        DacSingle& operator=(const DacSingle&);     
+    };
+}
+#endif  // F446_DAC_SINGLEL_HPP