ds1621.h

00001 #ifndef DS1621_H
00002 #define DS1621_H
00003 //------------includes-----------------
00004 #include "mbed.h"
00005 //------------
00006 /**
00007 * DS1621 simple control class,
00008 *
00009 * Example:
00010 * @code
00011 * // Continus temperature acquisition
00012 * #include "mbed.h"
00013 * #include "ds1621.h"
00014 *
00015 * DigitalOut myled1(LED1);
00016 * DigitalOut myled2(LED2);
00017 * DigitalOut myled3(LED3);
00018 * DigitalOut myled4(LED4);
00019 *
00020 * #define DS1621_ADDR 0     // I2c DS1621 address is 0x00
00021 *
00022 * Serial pc(USBTX, USBRX);  // Declare usb (see screen /dev/ttyUSB0 on linux)
00023 * I2C    i2c(p28, p27);     // Declare I2C (pullup resistors 2.2k from p28 and p27 to +3.3v)
00024 * DS1621 ds(&i2c, DS1621_ADDR);  // Declare ds1621 throught i2c interface
00025 *
00026 *int main() {
00027 *    i2c.frequency(5000); //5khz
00028 *    pc.printf("-----------------------\n\rMain\n\r");
00029 *    char count = 0;
00030 *    float temp = 0.0;
00031 *    ds.init(DS1621_ADDR);
00032 *    while (1) {
00033 *        myled1 = count & 0x01;
00034 *        myled2 = count & 0x02;
00035 *        myled3 = count & 0x04;
00036 *        myled4 = count & 0x08;
00037 *        count++;
00038 *        temp = ds.read(DS1621_ADDR);
00039 *        pc.printf("Measurment at start + %d seconds, Temperature=%3.1f\n\r",(count*5),temp);
00040 *        wait(5.0);
00041 *    }
00042 *}
00043 * @endcode
00044 */
00045 //------------defines------------------
00046 #define DS1621_Write  0x90
00047 #define DS1621_Read   0x91
00048 //------------class--------------------
00049 class DS1621 {
00050 //-----------methodes -----------------
00051 public:
00052     /**
00053     *@brief Constructor, initializes the ds1621 on I2C interface.
00054     *@param interface
00055     *@param address DS1621 i2c address on bus
00056     *@return none
00057     */
00058     DS1621 (I2C* interface, uint8_t address);
00059 
00060     /**
00061     *@brief Get temperature as float to the ds1621
00062     *@param address DS1621 i2c address on bus
00063     *@return current temperature as a float number in degrees Celsius
00064     */
00065     float read(uint8_t address);
00066     
00067     /**
00068     *@brief Initialize DS1621
00069     *@param address DS1621 i2c address on bus
00070     *@return none
00071     */
00072     void init(uint8_t address);
00073 
00074 public:
00075     bool dbx; // True activate debug message
00076 //---------- local variables ----------
00077 private:
00078     I2C* i2c; // Communication interface
00079 //-------------------------------------
00080 };
00081 #endif