dacboard/libs/Python_ST7735/examples/image_timed.py

# Copyright (c) 2014 Adafruit Industries
# Author: Tony DiCola
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
from PIL import Image
import time
import ST7735 as TFT
import Adafruit_GPIO as GPIO
import Adafruit_GPIO.SPI as SPI


WIDTH = 128
HEIGHT = 160
SPEED_HZ = 4000000


# Raspberry Pi configuration.
DC = 24
RST = 25
SPI_PORT = 0
SPI_DEVICE = 0

# BeagleBone Black configuration.
#DC = 'P9_15'
#RST = 'P9_12'
#SPI_PORT = 1
#SPI_DEVICE = 0

# Create TFT LCD display class.
disp = TFT.ST7735(
    DC,
    rst=RST,
    spi=SPI.SpiDev(
        SPI_PORT,
        SPI_DEVICE,
        max_speed_hz=SPEED_HZ))

# Initialize display.
disp.begin()

# Load an image.
print('Loading image...')
image = Image.open('cat.jpg')

# Resize the image and rotate it so matches the display.
image = image.rotate(90).resize((WIDTH, HEIGHT))

print('Press Ctrl-C to exit')
while(True):
    # Draw the image on the display hardware.
    print('Drawing image')
    start_time = time.time()
    disp.display(image)
    end_time = time.time()
    print('Time to draw image: ' + str(end_time - start_time))
    disp.clear((0, 0, 0))
    disp.display()