Diff: ds1621.h

Revision:

0:20bfb7df0470

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ds1621.h	Fri Jul 06 20:51:31 2012 +0000
@@ -0,0 +1,65 @@
+#ifndef __DS1621_H
+#define __DS1621_H
+
+#define VERSION 1.0
+
+#include <mbed.h>
+
+//Temperature conversion commands
+#define READ_TEMPERATURE    0xAA
+#define READ_COUNTER        0xA8
+#define READ_SLOPE          0xA9
+#define START_CONVERT_T     0xEE
+#define STOP_CONVERT_T      0x22
+
+//Thermostat commands
+#define ACCESS_TH           0xA1
+#define ACCESS_TL           0xA2
+#define ACCESS_CONFIG       0xAC
+
+//Config register
+#define DONE                0x80
+#define THF                 0x40
+#define TLF                 0x20
+#define NVB                 0x10
+#define POL                 0x02
+#define ONESHOT             0x01
+
+class DS1621 {
+public:
+    DS1621(I2C* interface, unsigned char address);
+
+    // Set configuration register
+    void SetConfig(unsigned char cfg);
+
+    // Read a DS1621 register
+    unsigned char ReadReg(unsigned char reg);
+
+    // Sets temperature limit
+    // -- works only with ACCESS_TL, and ACCESS_TH
+    void SetLimit(unsigned char reg, float temp);
+
+    // Start/Stop DS1621 temperature conversion
+    void StartConversion(bool start);
+
+    // Reads temperature or limit
+    // -- works only with READ_TEMPERATURE, ACCESS_TL, and ACCESS_TH
+    // -- for actual temperature, set ONESHOT mode off and start conversion
+    // -- returns true if reg valid
+    bool GetTemp(unsigned char reg, float *Temp);
+
+    // Read high resolution temperature
+    // -- returns temperature in 1/100ths degrees
+    // -- DS1621 is set in ONESHOT mode
+    // -- returns true if conversion has finished, new temperature is calculated
+    // -- returns false if conversion is busy, previous temperature is given
+    bool GetHResTemp(float *Temp);
+
+private:
+    I2C* i2c; // Communication interface
+    unsigned char address;
+    void ReadChipTemp(unsigned char cmd, unsigned char *data);
+    bool  conversion_busy;
+    float LastTemp;
+};
+#endif
\ No newline at end of file