OT07_lib.h

00001 #include "mbed.h"
00002 
00003 //OT07 Registers
00004 #define OT07_STATUS         0x00    // OT07 status regiter
00005 #define OT07_INT_EN         0x01    // OT07 Interrupt Enable
00006 #define OT07_FIFO_W         0x04    // OT07 FIFO Write Pointer
00007 #define OT07_FIFO_R         0x05    // OT07 FIFO Read Pointer
00008 #define OT07_FIFO_OF        0x06    // OT07 FIFO Overflow Counter
00009 #define OT07_FIFO_COUNT     0x07    // OT07 FIFO Data Count
00010 #define OT07_FIFO_DATA      0x08    // OT07 FIFO Data
00011 #define OT07_FIFO_CNFG1     0x09    // OT07 FIFO Configuration 1 (FIFO_A_FULL)
00012 #define OT07_FIFO_CNFG2     0x0A    // OT07 FIFO Configuration 2
00013 #define OT07_SYS            0x0C    // OT07 System Configuration
00014 #define OT07_ALARM_HIGH_MSB 0x10    // OT07 Alarm High MSB
00015 #define OT07_ALARM_HIGH_LSB 0x11    // OT07 Alarm High LSB
00016 #define OT07_ALARM_LOW_MSB  0x12    // OT07 Alarm Low MSB
00017 #define OT07_ALARM_LOW_LSB  0x13    // OT07 Alarm LOW LSB
00018 #define OT07_ADC_SETUP      0x14    // OT07 Temp Seneor Setup (ADC_RES[7:6]) & Convert Temperature [0]
00019 #define OT07_GPIO_SETUP     0x20    // OT07 GPIO Setup,  sets GPIO modes
00020 #define OT07_GPIO_CTRL      0x21    // OT07 GPIO control
00021 #define OT07_ROM_ID         0x31    // OT07 ROM_ID address of LSB?
00022 
00023 #define DEVICE_ACK      0
00024 #define DEVICE_NACK     1
00025 #define DEVICE_BAD_RESP 2
00026 
00027 #define MAX_DEVICES 64      // Maximum number of rom devices allowed
00028 #define ID_LENGTH   6       // Rom ID length in bytes
00029 
00030 struct OT07_struct {
00031     char rom_id[ID_LENGTH];     // device ROM ID
00032     char I2C_address;           // I2C addess, based on GPIO0 and GPIO1 at power up
00033                                 // Why char?
00034 }; 
00035 
00036 struct TempResponse {
00037     double tempC;     // Temperature in °C 
00038     int status;       // Status of Temperature read. 0 for success, 1 for error
00039 };
00040 
00041 // *****************************************************************************
00042 //   OT07_write_register(char, char, char)  writes single byte to OT07
00043 //                       char   I2C address
00044 //                       char   OT07 register address
00045 //                       char   data byte to be writen
00046 //   returns                    0 on success ACK, 1 on NACK 
00047 // *****************************************************************************
00048 int OT07_write_register(I2C *i2c, char I2C_add, char reg_add, char byte);
00049 
00050 /// ****************************************************************************
00051 //   OT07_write_register(char, char, char *, int)  writes multiple bytes to OT07
00052 //                       char   I2C address
00053 //                       char   OT07 register address
00054 //                       char * data vector of bytes to be written
00055 //                       int    number of bytes to write
00056 //   returns                    0 on success ACK, 1 on NACK 
00057 // *****************************************************************************
00058 int OT07_write_register(I2C *i2c, char I2C_add, char reg_add, char *bytes, int n);
00059 
00060 // *****************************************************************************
00061 //   OT07_read_register(char, char, char *, int)  writes single byte to OT07
00062 //                       char   I2C address
00063 //                       char   OT07 register address
00064 //                       char * data vector for read bytes to be stored in 
00065 //                       int    number of bytes to read
00066 //   returns                    0 on success, 1 on fail 
00067 // *****************************************************************************
00068 int OT07_read_register(I2C *i2c, char I2C_add, char reg_add, char *bytes, int n);
00069 
00070 // *****************************************************************************
00071 // convert_temperature(char)    sends convert command to OT07 device
00072 //                     char     I2C address
00073 // *****************************************************************************
00074 void convert_temperature(I2C *i2c, char I2C_add);
00075 
00076 //******************************************************************************
00077 // get_temperature(char)    read temperature from OT07 device FIFO register
00078 //                 char     I2C address
00079 // returns                  TempResponse tempC = temperature in oC 
00080 //                          status = register read result
00081 //******************************************************************************
00082 TempResponse get_temperature(I2C *i2c, char I2C_add);
00083 
00084 double calc_temperature(char *data);