Diff: DAC_MCP4922.hpp

Revision:

0:46d099dfd9d6

Child:

1:e997f4e94491

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DAC_MCP4922.hpp	Sat Mar 14 06:49:49 2015 +0000
@@ -0,0 +1,51 @@
+//------------------------------------------------------
+// Class for single DAC in MCP4922 -- Header
+//      Fast version
+//
+// 2015/02/03, Copyright (c) 2015 MIKAMI, Naoki
+//------------------------------------------------------
+
+#ifndef DAC_MCP4922_HPP
+#define DAC_MCP4922_HPP
+
+#include "DAC_MCP4921.hpp"
+
+namespace Mikami
+{
+    class DAC_MCP4922 : public DAC_MCP4921
+    {
+    public:
+        enum DAC { DAC_A = 0, DAC_B = 0x8000 };
+
+        // Constructor
+        DAC_MCP4922(
+            DAC dac = DAC_A,            // channel A
+            PinName mosi = SPI_MOSI,    // D11
+            PinName sclk = SPI_SCK,     // D13
+            PinName cs   = SPI_CS,      // D10
+            PinName ldac = SPI_MISO)    // D12
+                : DAC_MCP4921(mosi, sclk, cs, ldac),
+                  wcr_(dac | 0x3000) {}
+
+    protected:
+        void SetCR(DAC dac) { wcr_ = dac  | 0x3000; }
+        
+    private:
+        uint16_t wcr_;  // write command register
+
+        // for inhibition of copy constructor
+        DAC_MCP4922(const DAC_MCP4922&);
+        // for inhibition of substitute operator
+        DAC_MCP4922& operator=(const DAC_MCP4922&);     
+        
+        // for internal use
+        virtual void WriteDac(uint16_t value)
+        {
+            while (IsBusy()) {}
+            SlaveSelect();
+            WriteSpi(value | wcr_);
+        }
+    };
+}
+#endif  // DAC_MCP4922_HPP
+