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Make the structure of the ESC/POS commands less opaque 

(The commands are intended to be readable by people who grew up with ANSI
 escape codes so represent them that way in the code)
This commit is contained in:
Stephan Sokolow 2014-05-22 00:40:05 -04:00 committed by Patrick Kanzler
parent 9159aafd18
commit 4e1f9db5c7
1 changed files with 117 additions and 77 deletions
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194
escpos/constants.py
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@ -10,87 +10,127 @@ moved to `capabilities` as in `escpos-php by @mike42 <https://github.com/mike42/
:license: GNU GPL v3
"""
# Control characters
# as labelled in http://www.novopos.ch/client/EPSON/TM-T20/TM-T20_eng_qr.pdf
NUL = '\x00'
EOT = '\x04'
ENQ = '\x05'
DLE = '\x10'
DC4 = '\x14'
CAN = '\x18'
ESC = '\x1b'
FS = '\x1c'
GS = '\x1d'
# Feed control sequences
CTL_LF = '\x0a' # Print and line feed
CTL_FF = '\x0c' # Form feed
CTL_CR = '\x0d' # Carriage return
CTL_HT = '\x09' # Horizontal tab
CTL_SET_HT = '\x1b\x44' # Set horizontal tab positions
CTL_VT = '\x1b\x64\x04' # Vertical tab
CTL_LF = '\n' # Print and line feed
CTL_FF = '\f' # Form feed
CTL_CR = '\r' # Carriage return
CTL_HT = '\t' # Horizontal tab
CTL_SET_HT = ESC + '\x44' # Set horizontal tab positions
CTL_VT = '\v' # Vertical tab
# Printer hardware
HW_INIT = '\x1b\x40' # Clear data in buffer and reset modes
HW_SELECT = '\x1b\x3d\x01' # Printer select
HW_RESET = '\x1b\x3f\x0a\x00' # Reset printer hardware
# Cash Drawer
CD_KICK_2 = '\x1b\x70\x00' # Sends a pulse to pin 2 []
CD_KICK_5 = '\x1b\x70\x01' # Sends a pulse to pin 5 []
# Paper
PAPER_FULL_CUT = '\x1d\x56\x00' # Full cut paper
PAPER_PART_CUT = '\x1d\x56\x01' # Partial cut paper
HW_INIT = ESC + '@' # Clear data in buffer and reset modes
HW_SELECT = ESC + '=\x01' # Printer select
HW_RESET = ESC + '\x3f\x0a\x00' # Reset printer hardware
# (TODO: Where is this specified?)
# Cash Drawer (ESC p <pin> <on time: 2*ms> <off time: 2*ms>)
_CASH_DRAWER = lambda m, t1='', t2='': ESC + 'p' + m + t1 + t2
CD_KICK_2 = _CASH_DRAWER('\x00') # Sends a pulse to pin 2 []
CD_KICK_5 = _CASH_DRAWER('\x01') # Sends a pulse to pin 5 []
# Paper Cutter
_CUT_PAPER = lambda m: GS + 'V' + m
PAPER_FULL_CUT = _CUT_PAPER('\x00') # Full cut paper
PAPER_PART_CUT = _CUT_PAPER('\x01') # Partial cut paper
# Text format
TXT_NORMAL = '\x1b\x21\x00' # Normal text
TXT_2HEIGHT = '\x1b\x21\x10' # Double height text
TXT_2WIDTH = '\x1b\x21\x20' # Double width text
TXT_4SQUARE = '\x1b\x21\x30' # Quad area text
TXT_UNDERL_OFF = '\x1b\x2d\x00' # Underline font OFF
TXT_UNDERL_ON = '\x1b\x2d\x01' # Underline font 1-dot ON
TXT_UNDERL2_ON = '\x1b\x2d\x02' # Underline font 2-dot ON
TXT_BOLD_OFF = '\x1b\x45\x00' # Bold font OFF
TXT_BOLD_ON = '\x1b\x45\x01' # Bold font ON
TXT_FONT_A = '\x1b\x4d\x00' # Font type A
TXT_FONT_B = '\x1b\x4d\x01' # Font type B
TXT_ALIGN_LT = '\x1b\x61\x00' # Left justification
TXT_ALIGN_CT = '\x1b\x61\x01' # Centering
TXT_ALIGN_RT = '\x1b\x61\x02' # Right justification
# TODO: Acquire the "ESC/POS Application Programming Guide for Paper Roll
# Printers" and tidy up this stuff too.
TXT_NORMAL = ESC + '!\x00' # Normal text
TXT_2HEIGHT = ESC + '!\x10' # Double height text
TXT_2WIDTH = ESC + '!\x20' # Double width text
TXT_4SQUARE = ESC + '!\x30' # Quad area text
TXT_UNDERL_OFF = ESC + '\x2d\x00' # Underline font OFF
TXT_UNDERL_ON = ESC + '\x2d\x01' # Underline font 1-dot ON
TXT_UNDERL2_ON = ESC + '\x2d\x02' # Underline font 2-dot ON
TXT_BOLD_OFF = ESC + '\x45\x00' # Bold font OFF
TXT_BOLD_ON = ESC + '\x45\x01' # Bold font ON
TXT_FONT_A = ESC + '\x4d\x00' # Font type A
TXT_FONT_B = ESC + '\x4d\x01' # Font type B
TXT_ALIGN_LT = ESC + '\x61\x00' # Left justification
TXT_ALIGN_CT = ESC + '\x61\x01' # Centering
TXT_ALIGN_RT = ESC + '\x61\x02' # Right justification
# Char code table
CHARCODE_PC437 = '\x1b\x74\x00' # USA: Standard Europe
CHARCODE_JIS = '\x1b\x74\x01' # Japanese Katakana
CHARCODE_PC850 = '\x1b\x74\x02' # Multilingual
CHARCODE_PC860 = '\x1b\x74\x03' # Portuguese
CHARCODE_PC863 = '\x1b\x74\x04' # Canadian-French
CHARCODE_PC865 = '\x1b\x74\x05' # Nordic
CHARCODE_WEU = '\x1b\x74\x06' # Simplified Kanji, Hirakana
CHARCODE_GREEK = '\x1b\x74\x07' # Simplified Kanji
CHARCODE_HEBREW = '\x1b\x74\x08' # Simplified Kanji
CHARCODE_PC1252 = '\x1b\x74\x11' # Western European Windows Code Set
CHARCODE_PC866 = '\x1b\x74\x12' # Cirillic #2
CHARCODE_PC852 = '\x1b\x74\x13' # Latin 2
CHARCODE_PC858 = '\x1b\x74\x14' # Euro
CHARCODE_THAI42 = '\x1b\x74\x15' # Thai character code 42
CHARCODE_THAI11 = '\x1b\x74\x16' # Thai character code 11
CHARCODE_THAI13 = '\x1b\x74\x17' # Thai character code 13
CHARCODE_THAI14 = '\x1b\x74\x18' # Thai character code 14
CHARCODE_THAI16 = '\x1b\x74\x19' # Thai character code 16
CHARCODE_THAI17 = '\x1b\x74\x1a' # Thai character code 17
CHARCODE_THAI18 = '\x1b\x74\x1b' # Thai character code 18
CHARCODE_PC437 = ESC + '\x74\x00' # USA: Standard Europe
CHARCODE_JIS = ESC + '\x74\x01' # Japanese Katakana
CHARCODE_PC850 = ESC + '\x74\x02' # Multilingual
CHARCODE_PC860 = ESC + '\x74\x03' # Portuguese
CHARCODE_PC863 = ESC + '\x74\x04' # Canadian-French
CHARCODE_PC865 = ESC + '\x74\x05' # Nordic
CHARCODE_WEU = ESC + '\x74\x06' # Simplified Kanji, Hirakana
CHARCODE_GREEK = ESC + '\x74\x07' # Simplified Kanji
CHARCODE_HEBREW = ESC + '\x74\x08' # Simplified Kanji
CHARCODE_PC1252 = ESC + '\x74\x11' # Western European Windows Code Set
CHARCODE_PC866 = ESC + '\x74\x12' # Cirillic #2
CHARCODE_PC852 = ESC + '\x74\x13' # Latin 2
CHARCODE_PC858 = ESC + '\x74\x14' # Euro
CHARCODE_THAI42 = ESC + '\x74\x15' # Thai character code 42
CHARCODE_THAI11 = ESC + '\x74\x16' # Thai character code 11
CHARCODE_THAI13 = ESC + '\x74\x17' # Thai character code 13
CHARCODE_THAI14 = ESC + '\x74\x18' # Thai character code 14
CHARCODE_THAI16 = ESC + '\x74\x19' # Thai character code 16
CHARCODE_THAI17 = ESC + '\x74\x1a' # Thai character code 17
CHARCODE_THAI18 = ESC + '\x74\x1b' # Thai character code 18
# Barcode format
BARCODE_TXT_OFF = '\x1d\x48\x00' # HRI barcode chars OFF
BARCODE_TXT_ABV = '\x1d\x48\x01' # HRI barcode chars above
BARCODE_TXT_BLW = '\x1d\x48\x02' # HRI barcode chars below
BARCODE_TXT_BTH = '\x1d\x48\x03' # HRI barcode chars both above and below
BARCODE_FONT_A = '\x1d\x66\x00' # Font type A for HRI barcode chars
BARCODE_FONT_B = '\x1d\x66\x01' # Font type B for HRI barcode chars
BARCODE_HEIGHT = '\x1d\x68\x64' # Barcode Height [1-255]
BARCODE_WIDTH = '\x1d\x77\x03' # Barcode Width [2-6]
BARCODE_UPC_A = '\x1d\x6b\x00' # Barcode type UPC-A
BARCODE_UPC_E = '\x1d\x6b\x01' # Barcode type UPC-E
BARCODE_EAN13 = '\x1d\x6b\x02' # Barcode type EAN13
BARCODE_EAN8 = '\x1d\x6b\x03' # Barcode type EAN8
BARCODE_CODE39 = '\x1d\x6b\x04' # Barcode type CODE39
BARCODE_ITF = '\x1d\x6b\x05' # Barcode type ITF
BARCODE_NW7 = '\x1d\x6b\x06' # Barcode type NW7
_SET_BARCODE_TXT_POS = lambda n: GS + 'H' + n
BARCODE_TXT_OFF = _SET_BARCODE_TXT_POS('\x00') # HRI barcode chars OFF
BARCODE_TXT_ABV = _SET_BARCODE_TXT_POS('\x01') # HRI barcode chars above
BARCODE_TXT_BLW = _SET_BARCODE_TXT_POS('\x02') # HRI barcode chars below
BARCODE_TXT_BTH = _SET_BARCODE_TXT_POS('\x03') # HRI both above and below
_SET_HRI_FONT = lambda n: GS + 'f' + n
BARCODE_FONT_A = _SET_HRI_FONT('\x00') # Font type A for HRI barcode chars
BARCODE_FONT_B = _SET_HRI_FONT('\x01') # Font type B for HRI barcode chars
BARCODE_HEIGHT = GS + 'h' + '\x64' # Barcode Height [1-255]
BARCODE_WIDTH = GS + 'w' + '\x03' # Barcode Width [2-6]
#NOTE: This isn't actually an ESC/POS command. It's the common prefix to the
# two "print bar code" commands:
# - "GS k <type as integer> <data> NUL"
# - "GS k <type as letter> <data length> <data>"
# The latter command supports more barcode types
_SET_BARCODE_TYPE = lambda m: GS + 'k' + m
BARCODE_UPC_A = _SET_BARCODE_TYPE('\x00') # Barcode type UPC-A
BARCODE_UPC_E = _SET_BARCODE_TYPE('\x01') # Barcode type UPC-E
BARCODE_EAN13 = _SET_BARCODE_TYPE('\x02') # Barcode type EAN13
BARCODE_EAN8 = _SET_BARCODE_TYPE('\x03') # Barcode type EAN8
BARCODE_CODE39 = _SET_BARCODE_TYPE('\x04') # Barcode type CODE39
BARCODE_ITF = _SET_BARCODE_TYPE('\x05') # Barcode type ITF
BARCODE_NW7 = _SET_BARCODE_TYPE('\x06') # Barcode type NW7
# Image format
S_RASTER_N = '\x1d\x76\x30\x00' # Set raster image normal size
S_RASTER_2W = '\x1d\x76\x30\x01' # Set raster image double width
S_RASTER_2H = '\x1d\x76\x30\x02' # Set raster image double height
S_RASTER_Q = '\x1d\x76\x30\x03' # Set raster image quadruple
# NOTE: _PRINT_RASTER_IMG is the obsolete ESC/POS "print raster bit image"
# command. The constants include a fragment of the data's header.
_PRINT_RASTER_IMG = lambda data: GS + 'v0' + data
S_RASTER_N = _PRINT_RASTER_IMG('\x00') # Set raster image normal size
S_RASTER_2W = _PRINT_RASTER_IMG('\x01') # Set raster image double width
S_RASTER_2H = _PRINT_RASTER_IMG('\x02') # Set raster image double height
S_RASTER_Q = _PRINT_RASTER_IMG('\x03') # Set raster image quadruple
# Printing Density
PD_N50 = '\x1d\x7c\x00' # Printing Density -50%
PD_N37 = '\x1d\x7c\x01' # Printing Density -37.5%
PD_N25 = '\x1d\x7c\x02' # Printing Density -25%
PD_N12 = '\x1d\x7c\x03' # Printing Density -12.5%
PD_0 = '\x1d\x7c\x04' # Printing Density 0%
PD_P50 = '\x1d\x7c\x08' # Printing Density +50%
PD_P37 = '\x1d\x7c\x07' # Printing Density +37.5%
PD_P25 = '\x1d\x7c\x06' # Printing Density +25%
PD_P12 = '\x1d\x7c\x05' # Printing Density +12.5%
PD_N50 = GS + '\x7c\x00' # Printing Density -50%
PD_N37 = GS + '\x7c\x01' # Printing Density -37.5%
PD_N25 = GS + '\x7c\x02' # Printing Density -25%
PD_N12 = GS + '\x7c\x03' # Printing Density -12.5%
PD_0 = GS + '\x7c\x04' # Printing Density 0%
PD_P50 = GS + '\x7c\x08' # Printing Density +50%
PD_P37 = GS + '\x7c\x07' # Printing Density +37.5%
PD_P25 = GS + '\x7c\x06' # Printing Density +25%
PD_P12 = GS + '\x7c\x05' # Printing Density +12.5%