rfm12b.h

00001 #ifndef rfm12B_H
00002 #define rfm12B_H
00003 
00004 #include <mbed.h>
00005 
00006 /*!
00007  * \file       rfm12b.h
00008  * \brief      class for rfm2b in rawmode - only receive part implemented
00009  * \author     Karl Zweimüller based on code from WED 6.9.2009
00010  */
00011 
00012 typedef unsigned char Byte;    // used to be uint8_t : something a byte wide, whatever ....
00013 
00014 /** This Class handles a rfm12b transceiver
00015  * see http://www.hoperf.com/rf_fsk/rfm12b.htm
00016  *
00017 */
00018 class rfm12b {
00019 public:
00020     /** Create a rfm12b object
00021     *
00022     * @param mosi SPI-Interface. One of the 2 PSI-Interfaces of mbed. Pin p5 or p11
00023     * @param miso SPI-Interface. One of the 2 PSI-Interfaces of mbed. Pin p6 or p12
00024     * @param sclk SPI-Interface. One of the 2 PSI-Interfaces of mbed. Pin p7 or p13
00025     * @param nsel Chip-Select.   A Digial Output of mbed
00026     * @param rxdata  Data-Pin for received data. A DigitalIn of mbed
00027     */
00028     rfm12b(PinName mosi, PinName miso, PinName sclk, PinName nsel, PinName rxdata);
00029 
00030     /** init the spi-interface
00031     */
00032     void init_spi();
00033 
00034     /** initialize the device
00035     */
00036     void RFM_init(void);
00037 
00038     /** write and read 16 bit
00039     */
00040     uint16_t rfm_spi16(uint16_t outval);
00041 
00042     /** attach a function to be called when the data-pin changes from 0->1 and from 1->0
00043     * this function has to do all the decoding
00044     * keep this function short, as no interrrupts can occour within
00045     *
00046     * @param fptr Pointer to callback-function
00047     */
00048     void attachISR(void (*fptr)(void)) {
00049         m_pinRXData->fall(fptr);
00050         m_pinRXData->rise(fptr);
00051     }
00052 
00053     template<typename T>
00054     /** attach an object member function to be called when the data-pin changes from 0->1 and from 1->0
00055     *
00056     * @param tptr pointer to object
00057     * @param mprt pointer ro member function
00058     *
00059     */
00060     void attachISR(T* tptr, void (T::*mptr)(void)) {
00061         if ((mptr != NULL) && (tptr != NULL)) {
00062             m_pinRXData->fall(tptr, mptr);
00063             m_pinRXData->rise(tptr, mptr);
00064         }
00065     }
00066 
00067 
00068 
00069 private:
00070 
00071 
00072     DigitalOut    *cs;          //chipselect
00073     InterruptIn   *m_pinRXData; //rx data pin
00074     SPI           *rfm12b_spi;  //spi-interface
00075 
00076 
00077 };
00078 
00079 #endif