ADS1100.h

00001 #ifndef ADS1100_H
00002 #define ADS1100_H
00003 
00004 #include "mbed.h"
00005 
00006 class ADS1100{
00007     
00008     public:
00009         enum state{
00010             I2C_ADDR = 0x90,    //I2C adress 
00011         };
00012         
00013         
00014         /** Create ADC1100 instance
00015         * @param *i2c initialized I2C bus to use
00016         * @param ad   <0,7> marking code number for addr
00017         */
00018         ADS1100(I2C* i2c, char ad);
00019         
00020         /** Read outputCode 
00021         * @return signed 16bit output code
00022         */
00023         short read_s16(void);
00024         
00025         /** Read output
00026         * @param vdd proportional factor defualt=1.0
00027         * @return vdd*code/codemax*gain
00028         */
00029         float read(float vdd=1.0);
00030         
00031         /** Configure ADS1100
00032         * @param single true for single converion mode false for continuous
00033         * @param rate can be 8,16,32,128 sample per sencods
00034         * @param gain can be 1,2,4,8
00035         */
00036         void config(bool single, char rate, char gain);
00037         
00038         /** Read registers
00039         * @param output cofig reg
00040         * @return s16 code
00041         */
00042         short readReg(char* config);
00043         
00044         /** Initiate a conversion (single mode)
00045         */
00046         void startConvert(void);
00047         
00048         /** Check if converstion finished (continuous mode)
00049         * @return bool true if busy
00050         */
00051         bool busy(void);
00052         
00053     private:
00054         I2C*    _i2c;
00055         char    _addr;
00056         char    _config;
00057         short   _minCode;
00058         char    _gain;
00059 };
00060 
00061 #endif