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wasp-os/wasp/boards/simulator/display.py
Daniel Thompson 1cb1d96ef4 boards: simulator: Pick up out-of-bounds drawing 
Currently, if we ask the simulator to draw out-of-bounds then it will
do exactly that, it will draw outside of the "screen" and corrupt the
pixels of the watch frame that surrounds it. This is an obviously poor
simulation of the real watch and when the out-of-bounds error is only
an out-by-one error can be easily overlooked until we load the code on
the device.

Let's just throw an exception if we draw out-of-bounds. That can easily
be picked up during testing.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>
2021-02-25 07:36:15 +00:00

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# SPDX-License-Identifier: LGPL-3.0-or-later
# Copyright (C) 2020 Daniel Thompson
""" Simulated ST7789 display and CST816S touchscreen. """
import warnings
warnings.simplefilter("ignore", lineno=58)
import sys
import sdl2
import sdl2.ext
import numpy as np
from PIL import Image
import wasp
DISPOFF = 0x28
DISPON = 0x29
CASET = 0x2a
RASET = 0x2b
RAMWR = 0x2c
WIDTH = 240
HEIGHT = 240
SKIN = {
'fname' : 'res/simulator_skin.png',
'size' : (337, 427),
'button_profile' : 9,
'offset' : (53, 93)
}
class ST7789Sim(object):
def __init__(self):
self.x = 0
self.y = 0
self.colclip = [0, WIDTH-1]
self.rowclip = [0, HEIGHT-1]
self.cmd = 0
self.mute = False
def write(self, data):
# Converting data to a memoryview ensures we act more like spi.write()
# when running in a real device (e.g. data must be bytes-like object
# that implements the buffer protocol)
data = memoryview(data)
if len(data) == 1:
# Assume if we get a byte at a time then it is command.
# This is a simplification do we don't have to track
# the D/C pin from within the simulator.
cmd = data[0]
if cmd == DISPOFF:
self.mute = True
elif cmd == DISPON:
self.mute = False
window.refresh()
else:
self.cmd = data[0]
elif self.cmd == CASET:
self.colclip[0] = (data[0] << 8) + data[1]
assert(self.colclip[0] >= 0 and self.colclip[0] <= 240)
self.colclip[1] = (data[2] << 8) + data[3]
assert(self.colclip[1] >= 0 and self.colclip[1] <= 240)
self.x = self.colclip[0]
elif self.cmd == RASET:
self.rowclip[0] = (data[0] << 8) + data[1]
assert(self.rowclip[0] >= 0 and self.rowclip[0] <= 240)
self.rowclip[1] = (data[2] << 8) + data[3]
assert(self.rowclip[1] >= 0 and self.rowclip[1] <= 240)
self.y = self.rowclip[0]
elif self.cmd == RAMWR:
#pixelview = sdl2.ext.PixelView(windowsurface)
pixelview = sdl2.ext.pixels2d(windowsurface)
half = False
for d in data:
if not half:
rgb = d << 8
half = True
continue
rgb |= d
half = False
#pixel = ((rgb & 0xf800) >> 8,
# (rgb & 0x07e0) >> 3,
# (rgb & 0x001f) << 3)
pixel = (((rgb & 0xf800) << 8) +
((rgb & 0x07e0) << 5) +
((rgb & 0x001f) << 3))
pv_x = self.x + SKIN['adjust'][0]
pv_y = self.y + SKIN['adjust'][1]
pixelview[pv_x][pv_y] = pixel
self.x += 1
if self.x > self.colclip[1]:
self.x = self.colclip[0]
self.y += 1
if self.y > self.rowclip[1]:
self.y = self.rowclip[0]
# Forcibly release the surface to ensure it is unlocked
del pixelview
if not self.mute:
window.refresh()
class CST816SSim():
def __init__(self):
self.regs = bytearray(64)
def readfrom_mem_into(self, addr, reg, dbuf, pins):
tick(pins)
if not self.regs[1]:
raise OSError
dbuf[:] = self.regs[reg:len(dbuf)+reg]
if self.regs[3]:
self.regs[3] = 0
else:
self.regs[1] = 0
def writeto_mem(self, addr, reg, buf, pins):
tick(pins)
if reg == 0xa5:
# This will be a sleep command... which we can ignore
return
raise OSError
def handle_key(self, key, pins):
"""Use key presses to provoke different touchscreen events.
Note: The Down key provokes an upward swipe and vice versa.
Same for left and right. That is because the swipe up
gesture means show me the screen the is below me (hence
the controls are inverted compared to joystick-like
direction control).
"""
if key.keysym.sym == sdl2.SDLK_DOWN:
self.regs[1] = 2
elif key.keysym.sym == sdl2.SDLK_UP:
self.regs[1] = 1
elif key.keysym.sym == sdl2.SDLK_LEFT:
self.regs[1] = 4
elif key.keysym.sym == sdl2.SDLK_RIGHT:
self.regs[1] = 3
elif key.keysym.sym == sdl2.SDLK_n:
# Allow NEXT to be tested on the simulator
self.regs[1] = 253
self.regs[3] = 0x80
self.raise_interrupt(pins)
def handle_mousebuttondown(self, button, pins):
self.down_x = button.x
self.down_y = button.y
if self.down_x < 50:
pins['BUTTON'].value(0)
def handle_mousebuttonup(self, button, pins):
if self.down_x < 50:
pins['BUTTON'].value(1)
return
down_x = max(0, min(239, self.down_x-SKIN['adjust'][0]))
down_y = max(0, min(239, self.down_y-SKIN['adjust'][1]))
up_x = max(0, min(239, button.x-SKIN['adjust'][0]))
up_y = max(0, min(239, button.y-SKIN['adjust'][1]))
mv_x = up_x - down_x
mv_y = up_y - down_y
# Swipe detection
if abs(mv_x) + abs(mv_y) < 24:
self.regs[1] = 5
elif abs(mv_x) > abs(mv_y):
self.regs[1] = 4 if mv_x > 0 else 3
else:
self.regs[1] = 1 if mv_y > 0 else 2
self.regs[4] = up_x;
self.regs[6] = up_y;
self.raise_interrupt(pins)
def press(self, x, y):
pins = wasp.watch.Pin.pins
self.regs[1] = 5
self.regs[4] = x
self.regs[6] = y
self.raise_interrupt(pins)
def swipe(self, direction):
pins = wasp.watch.Pin.pins
if direction ==' up':
self.regs[1] = 1
elif direction == 'down':
self.regs[1] = 2
elif direction == 'left':
self.regs[1] = 4
elif direction == 'right':
self.regs[1] = 3
elif direction == 'next':
# Allow NEXT to be tested on the simulator
self.regs[1] = 253
self.regs[3] = 0x80
self.raise_interrupt(pins)
def raise_interrupt(self, pins):
pins['TP_INT'].raise_irq()
# Derive some extra values for padding the display
SKIN['left_pad'] = 9
SKIN['right_pad'] = SKIN['left_pad'] + SKIN['button_profile']
SKIN['top_pad'] = 3
SKIN['bottom_pad'] = 3
SKIN['window'] = (SKIN['size'][0] + SKIN['left_pad'] + SKIN['right_pad'],
SKIN['size'][1] + SKIN['top_pad'] + SKIN['bottom_pad'])
SKIN['adjust'] = (SKIN['offset'][0] + SKIN['left_pad'],
SKIN['offset'][1] + SKIN['top_pad'])
sdl2.ext.init()
window = sdl2.ext.Window("ST7789", size=SKIN['window'])
window.show()
windowsurface = window.get_surface()
sdl2.ext.fill(windowsurface, (0xff, 0xff, 0xff))
skin = sdl2.ext.load_image(SKIN['fname'])
sdl2.SDL_BlitSurface(skin, None, windowsurface, sdl2.SDL_Rect(
SKIN['left_pad'], SKIN['top_pad'], SKIN['size'][0], SKIN['size'][1]))
sdl2.SDL_FreeSurface(skin)
window.refresh()
spi_st7789_sim = ST7789Sim()
i2c_cst816s_sim = CST816SSim()
def save_image(surface, fname):
"""Save a surface as an image."""
raw = sdl2.ext.pixels2d(surface)
# Crop and swap the axes to ensure the final rotation is correct
cropped = raw[SKIN['top_pad']:-SKIN['bottom_pad']]
cropped = np.swapaxes(cropped, 0, 1)
cropped = cropped[SKIN['left_pad']:-SKIN['right_pad']]
# Split into r, g and b
r = cropped >> 16
g = (cropped >> 8) & 0xff
b = cropped & 0xff
# Combine into the final pixel data
rgb = np.uint8(np.dstack((r, g, b)))
# Save the image
Image.fromarray(rgb).save(fname)
def tick(pins):
events = sdl2.ext.get_events()
for event in events:
if event.type == sdl2.SDL_QUIT:
sdl2.ext.quit()
sys.exit(0)
elif event.type == sdl2.SDL_MOUSEBUTTONDOWN:
i2c_cst816s_sim.handle_mousebuttondown(event.button, pins)
elif event.type == sdl2.SDL_MOUSEBUTTONUP:
i2c_cst816s_sim.handle_mousebuttonup(event.button, pins)
elif event.type == sdl2.SDL_KEYDOWN:
if event.key.keysym.sym == sdl2.SDLK_s:
fname = f'res/{wasp.system.app.NAME}App.png'.replace(' ', '')
save_image(windowsurface, fname)
print(f'Saved: {fname}')
elif event.key.keysym.sym == sdl2.SDLK_TAB:
pins['BUTTON'].value(0)
else:
i2c_cst816s_sim.handle_key(event.key, pins)
elif event.type == sdl2.SDL_KEYUP:
if event.key.keysym.sym == sdl2.SDLK_TAB:
pins['BUTTON'].value(1)
else:
#print(event)
pass
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