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Sourcecode: libgphoto2 version File versions  Download package

dc120.h

/*

  Packet Structure
  --------------------------------------------------------------
  Command Packet:  CMD 00 [4 byte field] 00 1A
  Camera Response: [variable width field] CHECKSUM

  Responses
  --------------------------------------------------------------

      00    Command completed
      10    Command ready
      d1    Command received (ACK)
      d2    Correct packet
      e1    Command incorrect (NAK)
      e2    Command execution error
      e3    Illegal packet
      e4    Cancel


  Commands & Byte field descriptions
  --------------------------------------------------------------
  These are ones relavent to gPhoto

  * Album #0 is the root folder (directory/album/etc...)

  List albums (folders)
      Packet: 44 00 00 00 00 00 00 1A
      
      Response:
      ALBUMNAME1\0\0\0\0\0ALBUMNAME2\0\0\0\0\0ALBUMNAME3\0\0\0\0\0 [...] CS

      (258 bytes, 15 byte fixed-with fields in multiple packets)
      CS (checksum)     

  Picture count in album
      Packet: 45 LOC 00 00 AN 00 00 1A
      
            LOC (location): 00 (memory), 01 (card)
            AN (album #)

      Response: NP4 NP3 NP2 NP1 [11 reserved bytes] CS
      
            NP4 - NP1 (number of pictures): MSB to LSB number of pictures
            CS (checksum)

  Set Active album for next taken picture
      Packet: 49 00 AN 00 00 00 00 1A
      
            AN (album #)

  Set Image Quality
      Packet:     71 00 QQ 00 00 00 00 1A

            QQ (quality): 00 (no comp), 01 (best), 02 (better), 03 (good)

  Take picture
      Packet:     CMD 00 00 00 00 00 00 1A

            CMD:
            77    Take a picture to FLASH
            7C    Take a picture to card

  Picture Transfer/Deletion
      Packet:     CMD AA PU PL AL 00 00 1A

            CMD:
            4A    Send filename in album
            51    Send picture in memory
            52    Send TIFF info in memory
            54    Send TIFF in memory
            55    Send picture info in memory
            64    Send TIFF on card
            76    Copy image from memory to card
            7B    Erase picture from card

            AA (access mode): 00 (sequential), 01 (album)
            PU (picture # upper)
            PL (picture # lower)
            AL (album #)

*/

#define COMM1     (unsigned char)0x00
#define READY     (unsigned char)0x10
#define ACK       (unsigned char)0xd1
#define PACK1     (unsigned char)0xd2

/* nice. errors all have upper nibble of 'e' */
#define     NAK         (unsigned char)0xe1
#define     COMM0 (unsigned char)0xe2
#define PACK0     (unsigned char)0xe3
#define CANCL     (unsigned char)0xe4

#define TIMEOUT         5000
#define SLEEP_TIMEOUT   50
#define RETRIES         5

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