Diff: libraries/ad5270/AD5270.h

Revision:

1:c1f0670bb370

Child:

3:1a8c14043a4e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libraries/ad5270/AD5270.h	Wed Mar 30 17:35:04 2016 +0300
@@ -0,0 +1,56 @@
+/**
+*   @file     AD5270.h
+*   @brief    Header file for AD5270 rheostat
+*   @version  V0.1
+*   @author   ADI
+*   @date     March 2015
+**/
+
+#ifndef AD5270_H
+#define AD5270_H
+
+#include "mbed.h"
+
+/**
+ * @brief Analog Devices AD5270 SPI Digital Rheostat class
+ */
+class AD5270
+{
+public:
+
+    /// AD5270 commands
+    typedef enum {
+        NO_OP               =  0x00,   ///< No data
+        NO_OP_cmd           =  0x0000, ///< 16 bit no data
+        WRITE_RDAC          =  0x04,   ///< Write to the RDAC Register
+        READ_RDAC           =  0x08,   ///< Read from the RDAC Register
+        STORE_50TP          =  0x0C,   ///< Write to the RDAC to memory
+        SW_RST              =  0x10,   ///< Software reset to last memory location
+        READ_50TP_CONTENTS  =  0x14,   ///< Read the last memory contents
+        READ_50TP_ADDRESS   =  0x18,   ///< Read the last memory address
+        WRITE_CTRL_REG      =  0x1C,   ///< Write to the control Register
+        READ_CTRL_REG       =  0x20,   ///< Read from the control Register
+        SW_SHUTDOWN         =  0x24,   ///< Software shutdown (0) - Normal, (1) - Shutdown
+        HI_Zupper           =  0x80,   ///< Get the SDO line ready for High Z
+        HI_Zlower           =  0x01,   ///< Puts AD5270 into High Z mode
+        HI_Z_Cmd            =  0x8001   ///< Puts AD5270 into High Z mode*/
+    } AD5270Commands_t;
+
+    AD5270(PinName CS=SPI_CS, float max_resistance = 20000.0, PinName MOSI=SPI_MOSI,PinName MISO=SPI_MISO,PinName SCK=SPI_SCK);
+    void set_SDO_HiZ(void);
+    void frequency(int hz);
+    uint16_t calc_RDAC(float resistance);
+    uint16_t write_cmd(uint8_t command, uint16_t data = 0x00);
+    uint16_t write_reg(uint16_t data);
+    float get_max_resistance(void);
+
+    SPI ad5270;    ///< SPI instance of the AD5270
+    DigitalOut cs; ///< DigitalOut instance for the chipselect of the AD5270
+
+private:
+    const static int _RESET = 0xff;
+    const static int _DUMMY_BYTE = 0xAA;
+    float _max_resistance;
+};
+
+#endif