I2C.h

00001 #ifndef _I2C_H_
00002 #define _I2C_H_
00003 
00004 #include "BCM2835.h"
00005 
00006 class   I2C
00007 {
00008 public:
00009     I2C();
00010     ~I2C();
00011     uint8_t read(uint8_t address, char* buf, int len, bool repeat = false);
00012     uint8_t read(bool ack = true);
00013     int     write(uint8_t address, const char* buf, int len, bool repeat = false);
00014     int     write(uint8_t data);
00015 private:
00016     int     _memfd;
00017     int     _i2c_byte_wait_us;
00018     int     _i2c_bytes_to_read;
00019     uint8_t _addr;
00020 
00021     void    setAddress(uint8_t address);
00022     void    requestFrom(unsigned char address, int len);
00023     uint8_t read(char* buf);
00024     uint8_t read_repeat(char* buf, int len);
00025     int     write(const char* buf, int len);
00026     int     map_peripheral(struct bcm2835_peripheral* p);
00027     void    unmap_peripheral(struct bcm2835_peripheral* p);
00028     void    wait_i2c_done();
00029 };
00030 
00031 #endif  // _I2C_H_
00032