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clock.py
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clock.py
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# Hobbytronics TFT - analogue clock example code (clock.py)
#
# This example demonstrates the serialtft library included
#
# Modified from original clock example by Philip Howard
# Displays an analogue clock face with hour/min/sec hands
# and the current Day and time at the bottom of the screen.
# Run in background using command..
# sudo python clock.py &
#
# See product page at http://www.hobbytronics.co.uk/tft-serial-display-18
# for full command details
#
import threading
import time
from time import localtime, strftime
from serialtft import SerialTFT
CLOCK_ORIGIN_X = SerialTFT.Screen.width_half
CLOCK_ORIGIN_Y = SerialTFT.Screen.height_half-1
CLOCK_RADIUS = SerialTFT.Screen.height_half-20
CLOCK_BACKGROUND = SerialTFT.Color.black
CLOCK_OUTLINE = SerialTFT.Color.magenta
CLOCK_CENTER = SerialTFT.Color.blue
CLOCK_NUMBERS = SerialTFT.Color.green
CLOCK_DIGITAL = SerialTFT.Color.blue
CLOCK_HOUR_HAND = SerialTFT.Color.cyan
CLOCK_MINUTE_HAND = SerialTFT.Color.cyan
CLOCK_SECOND_HAND = SerialTFT.Color.red
# Setup the SerialTFT library, we want to clean up the LCD on exit
# so specify true for clear_on_exit
# We're driving the SerialTFT within sane limits,
# so we can turn off flush safely.
# SerialTFT( device, baud_rate, clear_on_exit, flush )
tft = SerialTFT("/dev/ttyAMA0", 9600, True, False)
# Uncomment the colour setup if you have firmware support
# for user-colours. Modified firmware can be found here:
# https://github.com/Gadgetoid/serial_tft_18/
# -- COLOR SETUP --
#tft.set_theme(SerialTFT.Theme.matrix)
#CLOCK_BACKGROUND = SerialTFT.Color.user_black
#CLOCK_OUTLINE = SerialTFT.Color.user_magenta
#CLOCK_CENTER = SerialTFT.Color.user_blue
#CLOCK_NUMBERS = SerialTFT.Color.user_green
#CLOCK_DIGITAL = SerialTFT.Color.user_blue
#CLOCK_HOUR_HAND = SerialTFT.Color.user_cyan
#CLOCK_MINUTE_HAND = SerialTFT.Color.user_cyan
#CLOCK_SECOND_HAND = SerialTFT.Color.user_red
# -- END COLOR SETUP --
# Clear Screen
tft.screen_rotation(SerialTFT.Rotation.landscape)
tft.bg_color(CLOCK_BACKGROUND)
tft.clear_screen()
# Draw the numbers 12, 6, 3 and 9 around the clock in green
tft.font_size(SerialTFT.Font.small)
tft.fg_color(CLOCK_NUMBERS)
tft.goto_pixel(SerialTFT.Screen.width_half-5,5)
tft.write('12')
tft.goto_pixel(SerialTFT.Screen.width_half-3,SerialTFT.Screen.height-13)
tft.write('6')
tft.goto_pixel(SerialTFT.Screen.width_half+50,SerialTFT.Screen.height_half-3)
tft.write('3')
tft.goto_pixel(SerialTFT.Screen.width_half-54,SerialTFT.Screen.height_half-3)
tft.write('9')
# Draw clock outline
tft.fg_color(CLOCK_OUTLINE)
tft.draw_filled_circle(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,CLOCK_RADIUS)
# Fill clock with background
tft.fg_color(CLOCK_BACKGROUND)
tft.draw_filled_circle(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,CLOCK_RADIUS-2)
# Draw the hub at the clock center
tft.fg_color(CLOCK_CENTER)
tft.draw_filled_circle(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,3)
lasthour = time.localtime().tm_hour
lastmin = time.localtime().tm_min
lastsec = time.localtime().tm_sec
def tick():
global lasthour, lastmin, lastsec
currentmin = time.localtime().tm_min
currentsec = time.localtime().tm_sec
currenthour = time.localtime().tm_hour
if(currenthour > 12):
currenthour = currenthour - 12 # Adjust from 24-hour time
currenthour = (currenthour * 5) + (currentmin/10) # Adjust hour to range 0-60
# Erase any old hands
tft.fg_color(CLOCK_BACKGROUND)
if( lasthour != currenthour ):
tft.analog_hand(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,CLOCK_RADIUS-25,lasthour)
if( lastmin != currentmin ):
tft.analog_hand(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,CLOCK_RADIUS-10,lastmin)
if( lastsec != currentsec ):
tft.analog_hand(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,CLOCK_RADIUS-15,lastsec)
# Draw the time/day at the bottom of the screen
tft.fg_color(CLOCK_DIGITAL)
tft.goto_char(1,14)
tft.write_line(strftime("%H:%M:%S", localtime()))
tft.goto_char(26 - len(strftime("%a", localtime())),14)
tft.write_line(strftime("%a", localtime()))
# Redraw hands
tft.fg_color(CLOCK_HOUR_HAND)
tft.analog_hand(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,CLOCK_RADIUS-25,currenthour)
tft.fg_color(CLOCK_MINUTE_HAND)
tft.analog_hand(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,CLOCK_RADIUS-10,currentmin)
tft.fg_color(CLOCK_SECOND_HAND)
tft.analog_hand(CLOCK_ORIGIN_X,CLOCK_ORIGIN_Y,CLOCK_RADIUS-15,currentsec)
lasthour = currenthour
lastmin = currentmin
lastsec = currentsec
threading.Timer(1,tick).start()
tick()