SC18IS602.h

00001 #ifndef H_SC18IS602
00002 #define H_SC18IS602
00003 
00004 #include "mbed.h"
00005 #include <string>
00006 
00007 #include "PCA9555.h"
00008 
00009 class SC18IS602
00010 {
00011     public:    
00012         
00013         static const int BUFFER_SIZE        = 200;// Byte
00014         static const bool ACK               = true;
00015         static const bool NACK              = false;
00016         static const bool INTERRUPT         = false;
00017         static const bool WAIT_SEC          = 10e-6;
00018         
00019         // Register Adress
00020         static const int HARD_ADR           = 0x50;
00021         static const int USER_ADR_MASK      = 0x07;
00022         
00023         struct{
00024             static const uint8_t CS0            = 0x01;
00025             static const uint8_t CS1            = 0x02;
00026             static const uint8_t CS2            = 0x04;
00027             static const uint8_t CS3            = 0x08;
00028         }CMD_RW;
00029         
00030         static const int ADR_SPI_CONF       = 0xF0;
00031         
00032         struct{
00033             static const int WRITE          = 0xF4;
00034             static const int READ           = 0xF5;
00035             static const int EN             = 0xF6;
00036             static const int CONF           = 0xF7;
00037         }ADR_GPIO;
00038         
00039         
00040         //Bit position of register Configure SPI Interface
00041         static const int SPI_BIT_ORDER      = 5;
00042         static const int SPI_MODE           = 2;
00043         static const int SPI_CLK_RATE       = 0;
00044         
00045         // Register Value SPI bit order
00046         struct{
00047             static const int MSB            = 0;                                // MSB of the data word is transmitted first
00048             static const int LSB            = 1;                                // LSB of the data word is transmitted first
00049         }SPI_BITORDER;
00050         
00051         
00052         // Register Value SPI Mode (CPOL, CPHA)
00053         static const int SPI_MODE_00       = 0;
00054         static const int SPI_MODE_01       = 1;
00055         static const int SPI_MODE_10       = 2;
00056         static const int SPI_MODE_11       = 3;
00057         
00058         //Register Value - Clock Rate
00059         static const int SPI_RATE_58K      = 0;
00060         static const int SPI_RATE_115K     = 1;
00061         static const int SPI_RATE_461K     = 2;
00062         static const int SPI_RATE_1M8      = 3;
00063         
00064         
00065                 
00066         // Bit position of Register GPIO Enable
00067         struct{
00068             static const int CS0          = 0;
00069             static const int CS1          = 1;
00070             static const int CS2          = 2;
00071             static const int CS3          = 3;
00072         }GPIO;
00073         
00074         
00075         
00076         // Bit position of Register GPIO config
00077         static const int GPIO_CONF_CS0     = 0;
00078         static const int GPIO_CONF_CS1     = 2;
00079         static const int GPIO_CONF_CS2     = 4;
00080         static const int GPIO_CONF_CS3     = 6;
00081         
00082         
00083         // Register Value of GPIO config
00084         static const int BIDIRECTIONAL     = 0;                                                  // quasi bidirecitonal
00085         static const int PUSH_PULL         = 1;                                                  //
00086         static const int INPUT_ONLY        = 2;                                                  // high impedance
00087         static const int OPEN_DRAIN        = 3;                                                  // needs an external pullup
00088 
00089 
00090         const int iINT;
00091 
00092         // public
00093         SC18IS602(I2C *_i2c, uint8_t uiAdr);         
00094         SC18IS602(I2C *_i2c, PCA9555 *_pca , uint8_t uiAdr);                    //
00095         SC18IS602(I2C *_i2c, DigitalIn *_IntPin, uint8_t uiAdr);                //
00096 
00097         
00098         bool configSPI(uint8_t uiConf);
00099         bool enableGPIO(uint8_t uiConf);
00100         bool configGPIO(uint8_t uiConf);
00101 
00102         bool gpio_pin3_on();
00103         bool gpio_pin3_off();
00104         bool gpio_toggle(uint8_t uiPort);
00105         
00106         bool sendViaSPI(uint8_t uiCS, char cAdrByte, char *cDataBytes, uint8_t uiNum);
00107         bool readViaSPI(uint8_t uiCS, char cAdrByte, char *cDataBytes, uint8_t uiNum);
00108     
00109     
00110         //void setIntFuncPtr( bool (*Int_ptr)(void));
00111     
00112     protected:                                                                    // private
00113         I2C *i2c;                                                               // Serial Data & Clock
00114         PCA9555 *pca;
00115         DigitalIn *IntPin;                                                      // Interrupt pin
00116         
00117         
00118         bool sendViaI2C(const char *cData, int iLength, string sDebug = "");
00119         bool readViaI2C(char *cData, int iLength, string sDebug = "");
00120         void waitFor(bool bInt);
00121         
00122         
00123         bool getInt();
00124         bool clearInt();
00125         
00126         //bool (*getInt_ptr)(void);
00127         
00128         
00129         // variable
00130         bool bAck;
00131         unsigned int uiNumByte;
00132         char cCmd[BUFFER_SIZE];
00133         
00134         const uint8_t SC18IS602_W;                                              // const write-address
00135         const uint8_t SC18IS602_R;                                              // const read-address
00136         
00137         
00138         char cDebug[100];
00139         
00140         int iTimeOut;
00141         
00142 };
00143 
00144 
00145 #endif