Question

我正在使用website中的代码块，这是我正在使用的部分：

import pygame
from pygame.locals import *
import os
from time import sleep
import RPi.GPIO as GPIO

#Setup the GPIOs as outputs - only 4 and 17 are available
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)
GPIO.setup(17, GPIO.OUT)

#Colours
WHITE = (255,255,255)

os.putenv('SDL_FBDEV', '/dev/fb1')
os.putenv('SDL_MOUSEDRV', 'TSLIB')
os.putenv('SDL_MOUSEDEV', '/dev/input/touchscreen')

pygame.init()
pygame.mouse.set_visible(False)
lcd = pygame.display.set_mode((320, 240))
lcd.fill((0,0,0))
pygame.display.update()

font_big = pygame.font.Font(None, 50)

touch_buttons = {'17 on':(80,60), '4 on':(240,60), '17 off':(80,180), '4 off':(240,180)}

for k,v in touch_buttons.items():
    text_surface = font_big.render('%s'%k, True, WHITE)
    rect = text_surface.get_rect(center=v)
    lcd.blit(text_surface, rect)

pygame.display.update()

while True:
    # Scan touchscreen events
    for event in pygame.event.get():
        if(event.type is MOUSEBUTTONDOWN):
            pos = pygame.mouse.get_pos()
            print pos
        elif(event.type is MOUSEBUTTONUP):
            pos = pygame.mouse.get_pos()
            print pos
            #Find which quarter of the screen we're in
            x,y = pos
            if y < 120:
                if x < 160:
                    GPIO.output(17, False)
                else:
                    GPIO.output(4, False)
            else:
                if x < 160:
                    GPIO.output(17, True)
                else:
                    GPIO.output(4, True)
    sleep(0.1)

当我运行它时（使用root权限）我收到此错误：

  File "touchscreen.py", line 20, in <module>
    pygame.mouse.set_visible(False)
pygame.error: video system not initialized

我正在尝试在我的项目的覆盆子pi触摸屏上创建一个简单的按钮界面，任何工作的解决方案都会受到欢迎。如果修复此代码对我来说无关紧要，替代代码同样有效。

谢谢，

马修伍德

Answer 1

我已经解决了这个问题，解决方案是输入设备被称为mouse0而不是触摸屏。

raspberry pi触摸屏 - Pygame.error：视频系统未初始化

1 个答案: