onewire.h

00001 /**
00002 * @file onewire.h
00003 * @brief library 1-Wire(www.maxim-ic.com)
00004 * @author Maciej Rajtar (Published 10 May 2010 www.mbed.org)
00005 * @author Frederic BLANC
00006 */
00007 
00008 #ifndef _onewire_
00009 #define _onewire_
00010 
00011 //#define DEBUG 1
00012 //#define DEBUG_L1 1
00013 //#define ONEWIRE_PIN  p30
00014 #define ONEWIRE_PIN  P1_25 // for LPC11U68 Xpresso v2 Board
00015 
00016 #define MAXSENSORS 16
00017 
00018 // rom-code size including CRC
00019 #define OW_ROMCODE_SIZE 8
00020 
00021 #define OW_OK          0x00
00022 #define OW_ERROR       0x01
00023 #define OW_START_FAIL  0x02
00024 #define OW_ERROR_CRC   0x03
00025 #define OW_ERROR_BAD_ID 0x04
00026 #define OW_BUSY          0x05
00027 
00028 #define OW_MATCH_ROM    0x55
00029 #define OW_SKIP_ROM     0xCC
00030 #define OW_SEARCH_ROM   0xF0
00031 #define OW_READ_ROM     0x33
00032 #define OW_CONDITIONAL_SEARCH     0xEC
00033 #define OW_OVERDRIVE_SKIP_ROM     0x3C
00034 #define OW_OVERDRIVE_MATCH_ROM    0x69
00035 
00036 #define OW_SHORT_CIRCUIT   0xFF
00037 #define OW_SEARCH_FIRST    0xFF        // start new search
00038 #define OW_PRESENCE_ERR    0x01
00039 #define OW_DATA_ERR        0xFE
00040 #define OW_LAST_DEVICE     0x00        // last device found
00041 //            0x01 ... 0x40: continue searching
00042 uint8_t search_sensors(uint8_t *nSensors,uint8_t *gSensorIDs );
00043 uint8_t ow_PullUp(void);
00044 uint8_t ow_show_id( uint8_t id[], size_t n ,char *text);
00045 uint8_t ow_test_pin (void);
00046 uint8_t ow_reset(void);
00047 uint8_t ow_rom_search( uint8_t diff, uint8_t id[] );
00048 uint8_t ow_command( uint8_t command, uint8_t id[] );
00049 uint8_t ow_find_sensor(uint8_t *diff, uint8_t id[]);
00050 uint8_t ow_parasite_enable(void);
00051 uint8_t ow_parasite_disable(void);
00052 uint8_t ow_bit_io( uint8_t b );
00053 uint8_t ow_byte_wr( uint8_t b );
00054 uint8_t ow_byte_rd( void );
00055 
00056 
00057 #endif