不韋 呂
/
OpenCampus_Echo
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Diff: AnalogIO_1ch/MCP4921.hpp
- Revision:
- 0:b027da9cfc23
- Child:
- 1:18123753e1d0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/AnalogIO_1ch/MCP4921.hpp Mon Jul 28 07:25:49 2014 +0000
@@ -0,0 +1,43 @@
+//------------------------------------------------------
+// Class for DAC, MCP4921
+//
+// Default pin assign
+// D11 SPI Master Out Slave In
+// D13 SPI Serial Clock
+// D10 SPL Slave Select
+//
+// 2014/07/18, Copyright (c) 2014 MIKAMI, Naoki
+//------------------------------------------------------
+
+#ifndef MCP4921_HPP
+#define MCP4921_HPP
+
+#include "mbed.h"
+
+namespace Mikami
+{
+ class DacMCP4921
+ {
+ public:
+ // Constructor
+ DacMCP4921(PinName mosi = SPI_MOSI, // D11
+ PinName sclk = SPI_SCK, // D13
+ PinName cs = SPI_CS, // D10
+ int hz = 20000000);
+
+ // -1.0f <= valeu <= 1.0f
+ void Write(float value);
+ // 0 <= valeu <= 4095
+ void Write(uint16_t value);
+ // generate LDAC pulse for dual DAC
+ void Ldac();
+
+ private:
+ SPI mySpi_; // SPI object
+ DigitalOut myCs_; // for chip select
+
+ // for use internally
+ void WriteDac(uint16_t value);
+ };
+}
+#endif // MCP4921_HPP