time.sleep(2)
# clear the display
ret = oledExp.clear()
print "clear return: ", ret
if (ret != 0):
exit()
# set the cursor by pixel
ret = oledExp.setCursorByPixel(1, 64)
print "setCursorByPixel return: ", ret
if (ret != 0):
exit()
# draw a few bytes
ret = oledExp.writeByte(0x0f)
print "writeByte return: ", ret
ret = oledExp.writeByte(0xf0)
print "writeByte return: ", ret
ret = oledExp.writeByte(0x0f)
print "writeByte return: ", ret
ret = oledExp.writeByte(0xf0)
print "writeByte return: ", ret
time.sleep(2)
ret = oledExp.setCursorByPixel(1, 127)
print "setCursorByPixel return: ", ret
if (ret != 0):
exit()
# draw a few bytes
# clear the display ret = oledExp.clear() print "clear return: ", ret if (ret != 0): exit() # set the cursor by pixel ret = oledExp.setCursorByPixel(1,64) print "setCursorByPixel return: ", ret if (ret != 0): exit() # draw a few bytes ret = oledExp.writeByte(0x0f) print "writeByte return: ", ret ret = oledExp.writeByte(0xf0) print "writeByte return: ", ret ret = oledExp.writeByte(0x0f) print "writeByte return: ", ret ret = oledExp.writeByte(0xf0) print "writeByte return: ", ret time.sleep(2) ret = oledExp.setCursorByPixel(1,127) print "setCursorByPixel return: ", ret if (ret != 0): exit() # draw a few bytes
#get an idea of the algorithm at work
sleepTime = 1.0
#The algorithm works as follows. Start with 3 vertices of a triangle and begin at
#one of them. Randomly choose a vertex. Go half way to that vertex and draw a point.
#Repeat until you are happy.
while True:
#pick a vertex
i = random.randint(0, 2)
vert = vertices[i]
#find the point halfway between
currX = int((vert['x'] + currX) / 2)
currY = int((vert['y'] + currY) / 2)
#convert to columns and bit patterns
col = int(currX / 8)
bitX = 1 << (currX % 8)
#OR the info into the existing data
state[currY][col] |= int(state[currY][col] | bitX)
#write the data to the display
oled.setCursorByPixel(col, currY)
oled.writeByte(state[currY][col])
#and do some sleeping for dramatic effect
time.sleep(sleepTime)
sleepTime = sleepTime - (sleepTime / 20)