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drivers/display: Add driver and test for uPy LCD160CR display.

This commit is contained in:
Damien George 2017-01-23 14:36:19 +11:00
parent e2d13d934a
commit 43d9f9916a
2 changed files with 625 additions and 0 deletions
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464
drivers/display/lcd160cr.py Normal file
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# Driver for official MicroPython LCD160CR display
# MIT license; Copyright (c) 2017 Damien P. George
from micropython import const
from utime import sleep_ms
from ustruct import calcsize, pack_into
import uerrno, machine
# for set_orient
PORTRAIT = const(0)
LANDSCAPE = const(1)
PORTRAIT_UPSIDEDOWN = const(2)
LANDSCAPE_UPSIDEDOWN = const(3)
# for set_startup_deco; can be or'd
STARTUP_DECO_NONE = const(0)
STARTUP_DECO_MLOGO = const(1)
STARTUP_DECO_INFO = const(2)
_uart_baud_table = {
2400: 0,
4800: 1,
9600: 2,
19200: 3,
38400: 4,
57600: 5,
115200: 6,
230400: 7,
460800: 8,
}
class LCD160CR:
def __init__(self, connect=None, *, pwr=None, i2c=None, spi=None, i2c_addr=98):
if connect in ('X', 'Y', 'XY', 'YX'):
i = connect[-1]
j = connect[0]
y = j + '4'
elif connect == 'C':
i = 2
j = 2
y = 'A7'
else:
if pwr is None or i2c is None or spi is None:
raise ValueError('must specify valid "connect" or all of "pwr", "i2c" and "spi"')
if pwr is None:
pwr = machine.Pin(y, machine.Pin.OUT)
if i2c is None:
i2c = machine.I2C(i, freq=1000000)
if spi is None:
spi = machine.SPI(j, baudrate=13500000, polarity=0, phase=0)
if not pwr.value():
pwr(1)
sleep_ms(10)
# else:
# alread have power
# lets be optimistic...
# set connections
self.pwr = pwr
self.i2c = i2c
self.spi = spi
self.i2c_addr = i2c_addr
# create temp buffers and memoryviews
self.buf16 = bytearray(16)
self.buf19 = bytearray(19)
self.buf = [None] * 10
for i in range(1, 10):
self.buf[i] = memoryview(self.buf16)[0:i]
self.buf1 = self.buf[1]
self.array4 = [0, 0, 0, 0]
# set default orientation and window
self.set_orient(PORTRAIT)
self._fcmd2b('<BBBBBB', 0x76, 0, 0, self.w, self.h) # viewport 'v'
self._fcmd2b('<BBBBBB', 0x79, 0, 0, self.w, self.h) # window 'y'
def _send(self, cmd):
i = self.i2c.writeto(self.i2c_addr, cmd)
if i == len(cmd):
return
cmd = memoryview(cmd)
n = len(cmd)
while True:
i += self.i2c.writeto(self.i2c_addr, cmd[i:])
if i == n:
return
sleep_ms(10)
def _fcmd2(self, fmt, a0, a1=0, a2=0):
buf = self.buf[calcsize(fmt)]
pack_into(fmt, buf, 0, 2, a0, a1, a2)
self._send(buf)
def _fcmd2b(self, fmt, a0, a1, a2, a3, a4=0):
buf = self.buf[calcsize(fmt)]
pack_into(fmt, buf, 0, 2, a0, a1, a2, a3, a4)
self._send(buf)
def _waitfor(self, n, buf):
t = 5000
while t:
self.i2c.readfrom_into(self.i2c_addr, self.buf1)
if self.buf1[0] >= n:
self.i2c.readfrom_into(self.i2c_addr, buf)
return
t -= 1
sleep_ms(1)
raise OSError(uerrno.ETIMEDOUT)
def oflush(self, n=255):
t = 5000
while t:
self.i2c.readfrom_into(self.i2c_addr + 1, self.buf1)
r = self.buf1[0]
if r >= n:
return
t -= 1
machine.idle()
raise OSError(uerrno.ETIMEDOUT)
def iflush(self):
t = 5000
while t:
self.i2c.readfrom_into(self.i2c_addr, self.buf16)
if self.buf16[0] == 0:
return
t -= 1
sleep_ms(1)
raise OSError(uerrno.ETIMEDOUT)
#### MISC METHODS ####
@staticmethod
def rgb(r, g, b):
return ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | (r >> 3)
@staticmethod
def clip_line(c, w, h):
while True:
ca = ce = 0
if c[1] < 0:
ca |= 8
elif c[1] > h:
ca |= 4
if c[0] < 0:
ca |= 1
elif c[0] > w:
ca |= 2
if c[3] < 0:
ce |= 8
elif c[3] > h:
ce |= 4
if c[2] < 0:
ce |= 1
elif c[2] > w:
ce |= 2
if ca & ce:
return False
elif ca | ce:
ca |= ce
if ca & 1:
if c[2] < c[0]:
c[0], c[2] = c[2], c[0]
c[1], c[3] = c[3], c[1]
c[1] += ((-c[0]) * (c[3] - c[1])) // (c[2] - c[0])
c[0] = 0
elif ca & 2:
if c[2] < c[0]:
c[0], c[2] = c[2], c[0]
c[1], c[3] = c[3], c[1]
c[3] += ((w - 1 - c[2]) * (c[3] - c[1])) // (c[2] - c[0])
c[2] = w - 1
elif ca & 4:
if c[0] == c[2]:
if c[1] >= h:
c[1] = h - 1
if c[3] >= h:
c[3] = h - 1
else:
if c[3] < c[1]:
c[0], c[2] = c[2], c[0]
c[1], c[3] = c[3], c[1]
c[2] += ((h - 1 - c[3]) * (c[2] - c[0])) // (c[3] - c[1])
c[3] = h - 1
else:
if c[0] == c[2]:
if c[1] < 0:
c[1] = 0
if c[3] < 0:
c[3] = 0
else:
if c[3] < c[1]:
c[0], c[2] = c[2], c[0]
c[1], c[3] = c[3], c[1]
c[0] += ((-c[1]) * (c[2] - c[0])) // (c[3] - c[1])
c[1] = 0
else:
return True
#### SETUP COMMANDS ####
def set_power(self, on):
self.pwr(value)
sleep_ms(15)
def set_orient(self, orient):
self._fcmd2('<BBB', 0x14, (orient & 3) + 4)
# update width and height variables
self.iflush()
self._send(b'\x02g0')
self._waitfor(4, self.buf[5])
self.w = self.buf[5][1]
self.h = self.buf[5][2]
def set_brightness(self, value):
self._fcmd2('<BBB', 0x16, value)
def set_i2c_addr(self, addr):
# 0x0e set i2c addr
if addr & 3:
raise ValueError('must specify mod 4 aligned address')
self._fcmd2('<BBW', 0x0e, 0x433249 | (addr << 24))
def set_uart_baudrate(self, baudrate):
try:
baudrate = _uart_baud_table[baudrate]
except KeyError:
raise ValueError('invalid baudrate')
self._fcmd2('<BBB', 0x18, baudrate)
def set_startup_deco(self, value):
self._fcmd2('<BBB', 0x19, value)
def save_to_flash(self):
self._fcmd2('<BBB', 0x66, 'n')
#### PIXEL ACCESS ####
def set_pixel(self, x, y, c):
self._fcmd2b('<BBBBH', 0x41, x, y, c)
def get_pixel(self, x, y):
self._fcmd2b('<BBBB', 0x61, x, y)
t = 1000
while t:
self.i2c.readfrom_into(self.i2c_addr, self.buf1)
if self.buf1[0] >= 2:
self.i2c.readfrom_into(self.i2c_addr, self.buf[3])
return self.buf[3][1] + self.buf[3][2] << 8
t -= 1
sleep_ms(1)
raise OSError(uerrno.ETIMEDOUT)
def get_line(self, x, y, buf):
l = len(buf) // 2
self._fcmd2b('<BBBBB', 0x10, l, x, y)
t = 1000
while t:
self.i2c.readfrom_into(self.i2c_addr, self.buf1)
if self.buf1[0] >= l:
self.i2c.readfrom_into(self.i2c_addr, buf)
return
t -= 1
sleep_ms(1)
raise OSError(uerrno.ETIMEDOUT)
def screen_dump(self, buf):
line = bytearray(self.w + 1)
h = len(buf) // (2 * self.w)
if h > self.h:
h = self.h
for i in range(h):
ix = i * self.w * 2
self.get_line(0, i, line)
for j in range(1, len(line)):
buf[ix] = line[j]
ix += 1
self.get_line(self.w // 2, i, line)
for j in range(1, len(line)):
buf[ix] = line[j]
ix += 1
def screen_load(self, buf):
l = self.w * self.h * 2+2
self._fcmd2b('<BBHBBB', 0x70, l, 16, self.w, self.h)
n = 0
ar = memoryview(buf)
while n < len(buf):
if len(buf) - n >= 0x200:
self._send(ar[n:n + 0x200])
n += 0x200
else:
self._send(ar[n:])
while n < self.w * self.h * 2:
self._send(b'\x00')
n += 1
#### TEXT COMMANDS ####
def set_pos(self, x, y):
self._fcmd2('<BBBB', 0x58, x, y)
def set_text_color(self, fg, bg):
self._fcmd2('<BBHH', 0x63, fg, bg)
def set_font(self, font, scale=0, bold=0, trans=0, scroll=0):
self._fcmd2('<BBBB', 0x46, (scroll << 7) | (trans << 6) | ((font & 3) << 4) | (bold & 0xf), scale & 0xff)
def write(self, s):
# TODO: eventually check for room in LCD input queue
self._send(s)
#### PRIMITIVE DRAWING COMMANDS ####
def set_pen(self, line, fill):
self._fcmd2('<BBHH', 0x50, line, fill)
def erase(self):
self._send(b'\x02\x45')
def dot(self, x, y):
if 0 <= x < self.w and 0 <= y < self.h:
self._fcmd2('<BBBB', 0x4b, x, y)
def rect(self, x, y, w, h, cmd=0x72):
if x + w <= 0 or y + h <= 0 or x >= self.w or y >= self.h:
return
elif x < 0 or y < 0:
left = top = True
if x < 0:
left = False
w += x
x = 0
if y < 0:
top = False
h += y
y = 0
if cmd == 0x51 or cmd == 0x72:
# draw interior
self._fcmd2b('<BBBBBB', 0x51, x, y, min(w, 255), min(h, 255))
if cmd == 0x57 or cmd == 0x72:
# draw outline
if left:
self._fcmd2b('<BBBBBB', 0x57, x, y, 1, min(h, 255))
if top:
self._fcmd2b('<BBBBBB', 0x57, x, y, min(w, 255), 1)
if x + w < self.w:
self._fcmd2b('<BBBBBB', 0x57, x + w, y, 1, min(h, 255))
if y + h < self.h:
self._fcmd2b('<BBBBBB', 0x57, x, y + h, min(w, 255), 1)
else:
self._fcmd2b('<BBBBBB', cmd, x, y, min(w, 255), min(h, 255))
def rect_outline(self, x, y, w, h):
self.rect(x, y, w, h, 0x57)
def rect_interior(self, x, y, w, h):
self.rect(x, y, w, h, 0x51)
def line(self, x1, y1, x2, y2):
ar4 = self.array4
ar4[0] = x1
ar4[1] = y1
ar4[2] = x2
ar4[3] = y2
if self.clip_line(ar4, self.w, self.h):
self._fcmd2b('<BBBBBB', 0x4c, ar4[0], ar4[1], ar4[2], ar4[3])
def dot_no_clip(self, x, y):
self._fcmd2('<BBBB', 0x4b, x, y)
def rect_no_clip(self, x, y, w, h):
self._fcmd2b('<BBBBBB', 0x72, x, y, w, h)
def rect_outline_no_clip(self, x, y, w, h):
self._fcmd2b('<BBBBBB', 0x57, x, y, w, h)
def rect_interior_no_clip(self, x, y, w, h):
self._fcmd2b('<BBBBBB', 0x51, x, y, w, h)
def line_no_clip(self, x1, y1, x2, y2):
self._fcmd2b('<BBBBBB', 0x4c, x1, y1, x2, y2)
def poly_dot(self, data):
if len(data) & 1:
raise ValueError('must specify even number of bytes')
self._fcmd2('<BBB', 0x71, len(data) // 2)
self._send(data)
def poly_line(self, data):
if len(data) & 1:
raise ValueError('must specify even number of bytes')
self._fcmd2('<BBB', 0x78, len(data) // 2)
self._send(data)
#### TOUCH COMMANDS ####
def touch_config(self, calib=False, save=False, irq=None):
self._fcmd2('<BBBB', 0x7a, (irq is not None) << 2 | save << 1 | calib, bool(irq) << 7)
def is_touched(self):
self._send(b'\x02T')
b = self.buf[4]
self._waitfor(3, b)
return b[1] >> 7 != 0
def get_touch(self):
self._send(b'\x02T') # implicit LCD output flush
b = self.buf[4]
self._waitfor(3, b)
return b[1] >> 7, b[2], b[3]
#### ADVANCED COMMANDS ####
def set_spi_win(self, x, y, w, h):
pack_into('<BBBHHHHHHHH', self.buf19, 0, 2, 0x55, 10, x, y, x + w - 1, y + h - 1, 0, 0, 0, 0xffff)
self._send(self.buf19)
def fast_spi(self, flush=True):
if flush:
self.oflush()
self._send(b'\x02\x12')
return self.spi
def show_framebuf(self, buf):
self.fast_spi().write(buf)
def set_scroll(self, on):
self._fcmd2('<BBB', 0x15, on)
def set_scroll_win(self, win, x=-1, y=0, w=0, h=0, vec=0, pat=0, fill=0x07e0, color=0):
pack_into('<BBBHHHHHHHH', self.buf19, 0, 2, 0x55, win, x, y, w, h, vec, pat, fill, color)
self._send(self.buf19)
def set_scroll_win_param(self, win, param, value):
self._fcmd2b('<BBBBH', 0x75, win, param, value)
def set_scroll_buf(self, s):
l = len(s)
if l > 32:
raise ValueError('length must be 32 or less')
self._fcmd2('<BBB', 0x11, l)
self._send(s)
def jpeg_start(self, l):
self.oflush()
self._fcmd2('<BBH', 0x6a, l)
def jpeg_data(self, buf):
self._send(buf)
def jpeg(self, buf):
self.jpeg_start(len(buf))
self.jpeg_data(buf)
def feed_wdt(self):
self._send(b'\x02\x17')
def reset(self):
self._send(b'\x02Y\xef\xbe\xad\xde')
sleep_ms(15)

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drivers/display/lcd160cr_test.py Normal file
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# Driver test for official MicroPython LCD160CR display
# MIT license; Copyright (c) 2017 Damien P. George
import time, math, framebuf, lcd160cr
def get_lcd(lcd):
if type(lcd) is str:
lcd = lcd160cr.LCD160CR(lcd)
return lcd
def show_adc(lcd, adc):
data = [adc.read_core_temp(), adc.read_core_vbat(), 3.3]
try:
data[2] = adc.read_vref()
except:
pass
for i in range(3):
lcd.set_text_color((825, 1625, 1600)[i], 0)
lcd.set_font(2)
lcd.set_pos(0, 100 + i * 16)
lcd.write('%4s: ' % ('TEMP', 'VBAT', 'VREF')[i])
if i > 0:
s = '%6.3fV' % data[i]
else:
s = '%5.1f°C' % data[i]
lcd.set_font(1, bold=0, scale=1)
lcd.write(s)
def test_features(lcd):
# if we run on pyboard then use ADC and RTC features
try:
import pyb
adc = pyb.ADCAll(12, 0xf0000)
rtc = pyb.RTC()
except:
adc = None
rtc = None
# set orientation and clear screen
lcd = get_lcd(lcd)
lcd.set_orient(lcd160cr.PORTRAIT)
lcd.set_pen(0, 0)
lcd.erase()
# create M-logo
mlogo = framebuf.FrameBuffer(bytearray(17 * 17 * 2), 17, 17, framebuf.RGB565)
mlogo.fill(0)
mlogo.fill_rect(1, 1, 15, 15, 0xffffff)
mlogo.vline(4, 4, 12, 0)
mlogo.vline(8, 1, 12, 0)
mlogo.vline(12, 4, 12, 0)
mlogo.vline(14, 13, 2, 0)
# create inline framebuf
offx = 14
offy = 19
w = 100
h = 75
fbuf = framebuf.FrameBuffer(bytearray(w * h * 2), w, h, framebuf.RGB565)
lcd.set_spi_win(offx, offy, w, h)
# initialise loop parameters
tx = ty = 0
t0 = time.ticks_us()
for i in range(300):
# update position of cross-hair
t, tx2, ty2 = lcd.get_touch()
if t:
tx2 -= offx
ty2 -= offy
if tx2 >= 0 and ty2 >= 0 and tx2 < w and ty2 < h:
tx, ty = tx2, ty2
else:
tx = (tx + 1) % w
ty = (ty + 1) % h
# create and show the inline framebuf
fbuf.fill(lcd.rgb(128 + int(64 * math.cos(0.1 * i)), 128, 192))
fbuf.line(w // 2, h // 2,
w // 2 + int(40 * math.cos(0.2 * i)),
h // 2 + int(40 * math.sin(0.2 * i)),
lcd.rgb(128, 255, 64))
fbuf.hline(0, ty, w, lcd.rgb(64, 64, 64))
fbuf.vline(tx, 0, h, lcd.rgb(64, 64, 64))
fbuf.rect(tx - 3, ty - 3, 7, 7, lcd.rgb(64, 64, 64))
for phase in (-0.2, 0, 0.2):
x = w // 2 - 8 + int(50 * math.cos(0.05 * i + phase))
y = h // 2 - 8 + int(32 * math.sin(0.05 * i + phase))
fbuf.blit(mlogo, x, y)
for j in range(-3, 3):
fbuf.text('MicroPython',
5, h // 2 + 9 * j + int(20 * math.sin(0.1 * (i + j))),
lcd.rgb(128 + 10 * j, 0, 128 - 10 * j))
lcd.show_framebuf(fbuf)
# show results from the ADC
if adc:
show_adc(lcd, adc)
# show the time
if rtc:
lcd.set_pos(2, 0)
lcd.set_font(1)
t = rtc.datetime()
lcd.write('%4d-%02d-%02d %2d:%02d:%02d.%01d' % (t[0], t[1], t[2], t[4], t[5], t[6], t[7] // 100000))
# compute the frame rate
t1 = time.ticks_us()
dt = time.ticks_diff(t1, t0)
t0 = t1
# show the frame rate
lcd.set_pos(2, 9)
lcd.write('%.2f fps' % (1000000 / dt))
def test_mandel(lcd):
# set orientation and clear screen
lcd = get_lcd(lcd)
lcd.set_orient(lcd160cr.PORTRAIT)
lcd.set_pen(0, 0xffff)
lcd.erase()
# function to compute Mandelbrot pixels
def in_set(c):
z = 0
for i in range(32):
z = z * z + c
if abs(z) > 100:
return i
return 0
# cache width and height of LCD
w = lcd.w
h = lcd.h
# create the buffer for each line and set SPI parameters
line = bytearray(w * 2)
lcd.set_spi_win(0, 0, w, h)
spi = lcd.fast_spi()
# draw the Mandelbrot set line-by-line
for v in range(h):
for u in range(w):
c = in_set((v / ((h - 1) / 3.2) - 2.3) + (u / ((w - 1) / 2.4) - 1.2) * 1j)
if c < 16:
rgb = c << 12 | c << 6
else:
rgb = 0xf800 | c << 6
line[2 * u] = rgb
line[2 * u + 1] = rgb >> 8
spi.write(line)
def test_all(lcd):
lcd = get_lcd(lcd)
test_features(lcd)
test_mandel(lcd)
print('To run all tests: test_all(<lcd>)')
print('Individual tests are: test_features, test_mandel')
print('<lcd> argument should be a connection, eg "X", or an LCD160CR object')