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helloworld.py
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Mon, Nov 25, 07:56

helloworld.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
import os, sys
# add ../../Sources to the PYTHONPATH
sys.path.append(os.path.join("..", "..", "Sources"))
from yocto_api import *
from yocto_display import *
def usage():
scriptname = os.path.basename(sys.argv[0])
print("Usage:")
print(scriptname + ' <serial_number>')
print(scriptname + ' <logical_name>')
print(scriptname + ' any ')
sys.exit()
def die(msg):
sys.exit(msg + ' (check USB cable)')
errmsg = YRefParam()
if len(sys.argv) < 2:
usage()
target = sys.argv[1]
# Setup the API to use local USB devices
if YAPI.RegisterHub("usb", errmsg) != YAPI.SUCCESS:
sys.exit("init error" + errmsg.value)
if target == 'any':
# retreive any RGB led
disp = YDisplay.FirstDisplay()
if disp is None:
die('No module connected')
else:
disp = YDisplay.FindDisplay(target + ".display")
if not disp.isOnline():
die("Module not connected ")
# display clean up
disp.resetAll()
# retreive the display size
w = disp.get_displayWidth()
h = disp.get_displayHeight()
# retreive the first layer
l0 = disp.get_displayLayer(0)
l0.clear()
# display a text in the middle of the screen
l0.drawText(w / 2, h / 2, YDisplayLayer.ALIGN.CENTER, "Hello world!")
# visualize each corner
l0.moveTo(0, 5)
l0.lineTo(0, 0)
l0.lineTo(5, 0)
l0.moveTo(0, h - 6)
l0.lineTo(0, h - 1)
l0.lineTo(5, h - 1)
l0.moveTo(w - 1, h - 6)
l0.lineTo(w - 1, h - 1)
l0.lineTo(w - 6, h - 1)
l0.moveTo(w - 1, 5)
l0.lineTo(w - 1, 0)
l0.lineTo(w - 6, 0)
# draw a circle in the top left corner of layer 1
l1 = disp.get_displayLayer(1)
l1.clear()
l1.drawCircle(h / 8, h / 8, h / 8)
# and animate the layer
print("Use Ctrl-C to stop")
x = 0
y = 0
vx = 1
vy = 1
while disp.isOnline():
x += vx
y += vy
if x < 0 or x > w - (h / 4):
vx = -vx
if y < 0 or y > h - (h / 4):
vy = -vy
l1.setLayerPosition(x, y, 0)
YAPI.Sleep(5, errmsg)
YAPI.FreeAPI()

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