i2c_bitbang.h
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00023 #ifndef INCLUDED_I2C_BITBANG_H
00024 #define INCLUDED_I2C_BITBANG_H
00025
00026 #include <i2c.h>
00027 #include <i2c_bbio.h>
00028
00033 class i2c_bitbang : public i2c {
00034 friend i2c_sptr make_i2c_bitbang (i2c_bbio_sptr io);
00035 i2c_bitbang (i2c_bbio_sptr io);
00036
00037 public:
00038 ~i2c_bitbang () {}
00039
00041 bool write (int addr, const unsigned char *buf, int nbytes);
00042
00044 int read (int addr, unsigned char *buf, int max_bytes);
00045
00046
00047 private:
00048 void start ();
00049 void stop ();
00050 void write_bit (bool bit);
00051 bool write_byte (char byte);
00052
00053 void set_sda (bool bit) { d_io->set_sda (bit); }
00054 void set_scl (bool bit) { d_io->set_scl (bit); }
00055 bool get_sda () { return d_io->get_sda (); }
00056
00057 i2c_bbio_sptr d_io;
00058 };
00059
00060 i2c_sptr make_i2c_bitbang (i2c_bbio_sptr io);
00061
00062 #endif
00063
00064