cevrero jeremy / Mbed 2 deprecated 1_Programme_principal

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Dependencies:   mbed

APDS_9300.h@0:40a613e7ba83, 2012-05-01 (annotated)

Committer:
jeremycevrero
Date:
Tue May 01 21:29:55 2012 +0000
Revision:
0:40a613e7ba83

        

        
Who changed what in which revision?

        

            
                
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/******************************************************************************





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 *





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 *    FILENAME:    APSDS_9300.h





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 *    DATE:        2012





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 *    AUTHOR:      Jeremy CEVRERO





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 *





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 *    DESCRIPTION: Driver for APDS_9300 Ambiant light sensor (Avago)





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 *





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 ******************************************************************************/





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I2C i2c(p28, p27);// sda, scl       ; 





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/** Declaration des variables  *****************************************************************/





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char ch0H;//variable ADC0 octet fort





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char ch0L;//variable ACDC0 octet faible





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int ch0;//valeur de chO sur 16 bits





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char ch1H;//variable ADC1 octet fort





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char ch1L;//variable ADC1 octet faible





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int ch1;//valeur de ch1 sur 16 bits





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float ch1divch0;//ch1/ch0





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float luminosite;// luminosite en lux





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int adresse = 0x52;//adresse du APDS-9300 ( pour adr sel a la masse)





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float a;//niveau de luminosite





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/*******************************************************************************





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 * FUNCTION:   start_9300





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 * PURPOSE:    Démarrer le composant.





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 ******************************************************************************/





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void start_9300 ()





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        { 





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        char cmd[2];               





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        cmd[0] = 0x80;//registre de commande selectionne le registre de controle





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        cmd[1] = 0x03;//Registre de controle met en route le composant





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        i2c.write(adresse, cmd, 2);





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        wait(0.1);





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        }





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/*******************************************************************************





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 * FUNCTION:   stop_9300





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 * PURPOSE:    Stopper le composant.





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 ******************************************************************************/





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void stop_9300 ()





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        { 





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        char cmd[2];





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        cmd[0] = 0x80;//registre de commande selectionne le registre de controle





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        cmd[1] = 0x12;//Registre de controle stoppe le composant





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        i2c.write(adresse, cmd, 2);





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        wait(0.1);





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        }





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/*******************************************************************************





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 * FUNCTION:   read_9300





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 * PURPOSE:    Lire la luminosite et l'afficher sur l'hyperterminal.





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 ******************************************************************************/        





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void read_9300 ()





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        {





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        start_9300 ();//Allume le composant       





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        char cmd[2];               





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        cmd[0] = 0x81;//s�lectionne le timing register





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        cmd[1] = 0x02;//mode low gain temps d'int�gration = 402ms         





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        i2c.write(adresse, cmd, 2);





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         cmd[0] = 0x8C;  //lecture datalow canal 0           





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        i2c.write(adresse,cmd, 1);





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        i2c.read(adresse|1,&ch0L,1,0);





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        cmd[0] = 0x8D;  //lecture datahigh canal 0           





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        i2c.write(adresse,cmd, 1);





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        i2c.read(adresse|1,&ch0H,1,0);





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        ch0=(ch0H <<8) + ch0L;





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        cmd[0] = 0x8E;  //lecture datalow canal 1        





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        i2c.write(adresse,cmd, 1);





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        i2c.read(adresse|1,&ch1L,1,0);





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        cmd[0] = 0x8F;  //lecture datahigh canal 1           





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        i2c.write(adresse,cmd, 1);





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        i2c.read(adresse|1,&ch1H,1,0);





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        ch1=(ch1H <<8) + ch1L;





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        ch1divch0 = ch1*1.0f / ch0;//ch1divch0=ch1/ch0 flottant 





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        if (0 <= ch1divch0 <= 0.52)//si ch1/ch0 compris entre 0 et 0.52 alors on applique la formule suivant





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            {





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            luminosite = (0.0315 * ch0) -((0.0593 * ch0) * (powf((ch1/ch0),1.4)));





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            }





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            else if (0.52 <= ch1divch0 <= 0.65)//sinon si il est compris entre 0.52 et 0.65





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                {





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                luminosite = ((0.0229 * ch0) - (0.0291 * ch1));//on applique cette formule





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                }





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                else if (0.65 <= ch1divch0 <= 0.80)//sinon si il est compris entre 0.65 et 0.80





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                    {





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                    luminosite = (0.0157 * ch0) - (0.0180 * ch1);//on applique cette formule





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                    }





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                    else if (0.80 <= ch1divch0<= 1.30)//sinon si il est compris entre 0.8 et 1.3





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                        {





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                        luminosite = (0.00338 * ch0) - (0.00260 * ch1);//on applique cette formule





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                        }





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                        else if (ch1divch0 >= 1.30)//sinon





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                            {





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                            luminosite = 0;





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                            }





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        luminosite=luminosite*16;





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         pc.printf("ch1divch0 = %f, ch1 = Ox%X ,ch0 = 0x%X,luminosite = %f \n\r",ch1divch0,ch1, ch0,luminosite);// affiche ch1/ch0,ch1,ch0et luminosite





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         a = luminosite/100000;//Generation du pwm





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              stop_9300 ();//Eteint le composant   





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}