本文整理汇总了Python中Adafruit_Thermal.setLineHeight方法的典型用法代码示例。如果您正苦于以下问题：Python Adafruit_Thermal.setLineHeight方法的具体用法？Python Adafruit_Thermal.setLineHeight怎么用？Python Adafruit_Thermal.setLineHeight使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Adafruit_Thermal的用法示例。
在下文中一共展示了Adafruit_Thermal.setLineHeight方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1:
# 需要导入模块: import Adafruit_Thermal [as 别名]
# 或者: from Adafruit_Thermal import setLineHeight [as 别名]
printer.upsideDownOff()
printer.sidewaysOn()
printer.println("Sideways ON")
printer.sidewaysOff()
printer.setSize('L') # Set type size, accepts 'S', 'M', 'L'
printer.println("Large")
printer.setSize('M')
printer.println("Medium")
printer.setSize('S')
printer.println("Small")
printer.justify('C')
printer.println("normal\nline\nspacing")
printer.setLineHeight(50)
printer.println("Taller\nline\nspacing")
printer.setLineHeight() # Reset to default
printer.justify('L')
# Barcode examples
printer.feed(1)
# CODE39 is the most common alphanumeric barcode
printer.printBarcode("ADAFRUT", printer.CODE39)
printer.setBarcodeHeight(100)
# Print UPC line on product barcodes
printer.printBarcode("123456789123", printer.UPC_A)
# Print the 75x75 pixel logo in adalogo.py
import gfx.adalogo as adalogo
printer.printBitmap(adalogo.width, adalogo.height, adalogo.data)示例2: OTP
# 需要导入模块: import Adafruit_Thermal [as 别名]
# 或者: from Adafruit_Thermal import setLineHeight [as 别名]
#
# OTP (or any other text file) printer. Push the button to
# print another copy of the file.
from __future__ import print_function
import RPi.GPIO as GPIO
import sys, os, random, getopt, re
import subprocess, time, Image, socket
from Adafruit_Thermal import *
ledPin = 18
buttonPin = 23
holdTime = 2 # Duration for button hold (shutdown)
tapTime = 0.01 # Debounce time for button taps
printer = Adafruit_Thermal("/dev/ttyAMA0", 19200, timeout=5)
printer.setLineHeight(23) # So graphical chars fit together
# Called when button is briefly tapped. Prints one copy of the OTP.
def tap():
GPIO.output(ledPin, GPIO.HIGH) # LED on while working
otp = file("/ramdisk/otp.txt")
printer.feed(3)
for line in otp:
printer.println(line)
printer.feed(3)
file.close(otp)
GPIO.output(ledPin, GPIO.LOW)
# Called when button is held down. Invokes shutdown process.
def hold():
GPIO.output(ledPin, GPIO.HIGH)