Diff: si7210.h

Revision:

0:ee9d6b55bf85

Child:

1:8cb452601311

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/si7210.h	Tue Sep 12 17:17:09 2017 +0000
@@ -0,0 +1,57 @@
+#include "mbed.h"
+
+#ifndef SI7210_H
+#define SI7210_H
+
+#define SI7210_BASE_ADDR_7BIT   0x30
+
+typedef struct {
+    float       mag_T;
+    float       temp_C;
+} si7210_measurements_t;
+
+class SI7210 {
+ public:
+    /**
+    * Constructor
+    *
+    * @param i2c I2C class servicing the strip
+    */
+    SI7210(I2C * i2c, uint8_t addr_7bit) : _i2c(i2c) {
+        _addr_8bit = ((addr_7bit & 0x3) + SI7210_BASE_ADDR_7BIT) << 1;
+    }
+    
+    /**
+    * Read temperature and humidity
+    *
+    * @param data points to struct to store measurements in.  Stucture is
+    *      valid only when function returns success indication.
+    *
+    * @returns true (success) or false (failure)
+    */
+    bool read(si7210_measurements_t * data);
+
+ protected:
+ 
+    /**
+    * I2C read/write helper function
+    *
+    * @param address is the register to read/write
+    * @param buff holds the data to write and recieves the data to read
+    * @param writeSize is the number of bytes to write to register
+    * @param readSize is the number of bytes to retrieve from device
+    *
+    * @returns true (success) or false (failure)
+    */
+    bool _i2c_transfer(int address, void * buff, size_t writeSize, size_t readSize);
+    
+    /**
+    * 
+    bool _validate(void)
+    */
+
+    int     _addr_8bit;
+    I2C    *_i2c;
+};
+
+#endif //SI7210_H