escpos

package module
v0.0.0-...-0b15b30 Latest Latest
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 Go to latest Published: Oct 10, 2019 License: MIT Imports: 7 Imported by: 0

README

About escpos

This is a simple Golang package that provides ESC-POS library functions to help with sending control codes to a ESC-POS capable printer such as an Epson TM-T82 or similar.

These printers are often used in retail environments in conjunction with a point-of-sale (POS) system.

Installation

Install the package via the following:

   go get -u github.com/panjjo/escpos

Example epos-server

An example EPOS server implementation is available in the epos-server subdirectory of this project. This example server is more or less compatible with Epson TM-Intelligent printers and print server implementations.

Usage

The escpos package can be used similarly to the following:

package main

import (
    "bufio"
    "os"

    "github.com/panjjo/escpos"
)

func main() {
    f, err := os.OpenFile("/dev/usb/lp3",os.O_RDWR,0755)
    if err != nil {
        panic(err)
    }
    defer f.Close()


    p := escpos.New()

    p.Init()
    p.SetSmooth(1)
    p.SetFontSize(2, 3)
    p.SetFont("A")
    p.Write("test ")
    p.SetFont("B")
    p.Write("test2 ")
    p.SetFont("C")
    p.Write("test3 ")
    p.Formfeed()

    p.SetFont("B")
    p.SetFontSize(1, 1)

    p.SetEmphasize(1)
    p.Write("halle")
    p.Formfeed()

    p.SetUnderline(1)
    p.SetFontSize(4, 4)
    p.Write("halle")

    p.SetReverse(1)
    p.SetFontSize(2, 4)
    p.Write("halle")
    p.Formfeed()

    p.SetFont("C")
    p.SetFontSize(8, 8)
    p.Write("halle")
    p.FormfeedN(5)

    p.Cut()
    p.End()
     
    _,b:=p.ReadByte()
    f.Write(b)
}

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Escpos 

type Escpos struct {
	// contains filtered or unexported fields
}

func New 

func New() (e *Escpos)

create Escpos printer

func (*Escpos) Barcode 

func (e *Escpos) Barcode(s string)

func (*Escpos) BarcodeHRI 

func (e *Escpos) BarcodeHRI(n int)

print barcode HRI

func (*Escpos) BarcodeHRIFontSize 

func (e *Escpos) BarcodeHRIFontSize(n int)

print barcode HRI font size

func (*Escpos) BarcodeHigth 

func (e *Escpos) BarcodeHigth(n int)

print barcode HRI font H

func (*Escpos) Cut 

func (e *Escpos) Cut()

send cut

func (*Escpos) DefaultSpacing 

func (e *Escpos) DefaultSpacing()

默认行间距

func (*Escpos) End 

func (e *Escpos) End()

end output

func (*Escpos) Feed 

func (e *Escpos) Feed(params map[string]string)

feed the printer

func (*Escpos) FeedAndCut 

func (e *Escpos) FeedAndCut(params map[string]string)

feed and cut based on parameters

func (*Escpos) Formfeed 

func (e *Escpos) Formfeed()

send formfeed

func (*Escpos) FormfeedN 

func (e *Escpos) FormfeedN(n int)

send N formfeeds

func (*Escpos) Image 

func (e *Escpos) Image(params map[string]string, data string)

write an image

func (*Escpos) Init 

func (e *Escpos) Init()

init/reset printer settings

func (*Escpos) Linefeed 

func (e *Escpos) Linefeed(n int)

send linefeed

func (*Escpos) MoveBaseSize 

func (e *Escpos) MoveBaseSize()

水平定位

func (*Escpos) OpenBeep 

func (e *Escpos) OpenBeep()

打开蜂鸣器

func (*Escpos) OpenCashBox 

func (e *Escpos) OpenCashBox()

开钱箱

func (*Escpos) PrintAndFeed 

func (e *Escpos) PrintAndFeed(i int)

print and feed paper

func (*Escpos) PrintPic 

func (e *Escpos) PrintPic()

打印下载位图

func (*Escpos) PrintSplitLine 

func (e *Escpos) PrintSplitLine(n int, s string)

func (*Escpos) PrinterImage 

func (e *Escpos) PrinterImage(img image.Image)

print img 可用做打印二维码 使用33（24点双密度)

func (*Escpos) Pulse 

func (e *Escpos) Pulse()

pulse (open the drawer)

func (*Escpos) ReadString 

func (e *Escpos) ReadString() string

read data by buffer

func (*Escpos) Readbyte 

func (e *Escpos) Readbyte() (int, []byte)

read data by buffer

func (*Escpos) SendEmphasize 

func (e *Escpos) SendEmphasize()

send emphasize / doublestrike

func (*Escpos) SendFontSize 

func (e *Escpos) SendFontSize()

func (*Escpos) SendMoveX 

func (e *Escpos) SendMoveX(x uint16)

send move x

func (*Escpos) SendMoveY 

func (e *Escpos) SendMoveY(y uint16)

send move y

func (*Escpos) SendReverse 

func (e *Escpos) SendReverse()

send reverse

func (*Escpos) SendRightSpace 

func (e *Escpos) SendRightSpace(n int)

set right space

func (*Escpos) SendRotate 

func (e *Escpos) SendRotate()

send rotate

func (*Escpos) SendSmooth 

func (e *Escpos) SendSmooth()

send smooth

func (*Escpos) SendTo 

func (e *Escpos) SendTo(w io.Writer) (int, error)

send b to printer

func (*Escpos) SendUnderline 

func (e *Escpos) SendUnderline()

send underline

func (*Escpos) SendUpsidedown 

func (e *Escpos) SendUpsidedown()

send upsidedown

func (*Escpos) SetAlign 

func (e *Escpos) SetAlign(align string)

set alignment

func (*Escpos) SetChineseOn 

func (e *Escpos) SetChineseOn()

开启中文打印

func (*Escpos) SetEmphasize 

func (e *Escpos) SetEmphasize(u uint8)

set emphasize

func (*Escpos) SetFont 

func (e *Escpos) SetFont(font string)

set font

func (*Escpos) SetFontSize 

func (e *Escpos) SetFontSize(width, height uint8)

set font size

func (*Escpos) SetLang 

func (e *Escpos) SetLang(lang string)

set language -- ESC R

func (*Escpos) SetLineSpacing 

func (e *Escpos) SetLineSpacing(n int)

设置行间距

func (*Escpos) SetLocation 

func (e *Escpos) SetLocation(l, n int)

set location l+n*255 设置绝对打印位置

func (*Escpos) SetMoveSize 

func (e *Escpos) SetMoveSize(x, y int)

设置横向和纵向移动单位

func (*Escpos) SetPrintPic 

func (e *Escpos) SetPrintPic()

func (*Escpos) SetPrinterType 

func (e *Escpos) SetPrinterType(n int)

设置打印模式

func (*Escpos) SetReLocation 

func (e *Escpos) SetReLocation(l, n int)

设置相对打印位置

func (*Escpos) SetReverse 

func (e *Escpos) SetReverse(v uint8)

set reverse

func (*Escpos) SetRotate 

func (e *Escpos) SetRotate(v uint8)

set rotate

func (*Escpos) SetSmooth 

func (e *Escpos) SetSmooth(v uint8)

set smooth

func (*Escpos) SetUnderline 

func (e *Escpos) SetUnderline(v uint8)

set underline

func (*Escpos) SetUpsidedown 

func (e *Escpos) SetUpsidedown(v uint8)

set upsidedown

func (*Escpos) Text 

func (e *Escpos) Text(params map[string]string, data string)

do a block of text

func (*Escpos) Write 

func (e *Escpos) Write(data string) (int, error)

write a string to the b

func (*Escpos) WriteNode 

func (e *Escpos) WriteNode(name string, params map[string]string, data string)

write a "node" to the printer

func (*Escpos) WriteRaw 

func (e *Escpos) WriteRaw(data []byte) (n int, err error)

write raw bytes to b

Source Files

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