253 lines
6.7 KiB
Python
253 lines
6.7 KiB
Python
# This file is part of the MicroPython project, http://micropython.org/
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#
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# The MIT License (MIT)
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#
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# Copyright (c) 2016 Glenn Ruben Bakke
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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"""
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MicroPython Seeedstudio TFT Shield V2 driver, SPI interfaces, Analog GPIO
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Contains SD-card reader, LCD and Touch sensor
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The pca10040 pin layout is used as reference.
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Example usage of LCD:
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from seeedstudio_tft_shield_v2 import ILI9341
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lcd = ILI9341(240, 320)
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lcd.text("Hello World!, 32, 32)
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lcd.show()
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Example usage of SD card reader:
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import os
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from seeedstudio_tft_shield_v2 import mount_tf
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tf = mount_tf()
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os.listdir()
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"""
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import os
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import time
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import framebuf
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from machine import SPI, Pin
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from sdcard import SDCard
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def mount_tf(self, mount_point="/"):
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sd = SDCard(SPI(0), Pin("P15", mode=Pin.OUT))
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os.mount(sd, mount_point)
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class ILI9341:
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def __init__(self, width, height):
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self.width = width
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self.height = height
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self.pages = self.height // 8
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self.buffer = bytearray(self.pages * self.width)
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self.framebuf = framebuf.FrameBuffer(
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self.buffer, self.width, self.height, framebuf.MONO_VLSB
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)
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self.spi = SPI(0)
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# chip select
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self.cs = Pin("P16", mode=Pin.OUT, pull=Pin.PULL_UP)
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# command
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self.dc = Pin("P17", mode=Pin.OUT, pull=Pin.PULL_UP)
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# initialize all pins high
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self.cs.high()
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self.dc.high()
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self.spi.init(baudrate=8000000, phase=0, polarity=0)
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self.init_display()
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def init_display(self):
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time.sleep_ms(500)
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self.write_cmd(0x01)
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time.sleep_ms(200)
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self.write_cmd(0xCF)
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self.write_data(bytearray([0x00, 0x8B, 0x30]))
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self.write_cmd(0xED)
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self.write_data(bytearray([0x67, 0x03, 0x12, 0x81]))
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self.write_cmd(0xE8)
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self.write_data(bytearray([0x85, 0x10, 0x7A]))
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self.write_cmd(0xCB)
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self.write_data(bytearray([0x39, 0x2C, 0x00, 0x34, 0x02]))
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self.write_cmd(0xF7)
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self.write_data(bytearray([0x20]))
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self.write_cmd(0xEA)
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self.write_data(bytearray([0x00, 0x00]))
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# Power control
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self.write_cmd(0xC0)
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# VRH[5:0]
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self.write_data(bytearray([0x1B]))
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# Power control
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self.write_cmd(0xC1)
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# SAP[2:0];BT[3:0]
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self.write_data(bytearray([0x10]))
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# VCM control
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self.write_cmd(0xC5)
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self.write_data(bytearray([0x3F, 0x3C]))
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# VCM control2
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self.write_cmd(0xC7)
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self.write_data(bytearray([0xB7]))
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# Memory Access Control
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self.write_cmd(0x36)
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self.write_data(bytearray([0x08]))
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self.write_cmd(0x3A)
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self.write_data(bytearray([0x55]))
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self.write_cmd(0xB1)
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self.write_data(bytearray([0x00, 0x1B]))
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# Display Function Control
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self.write_cmd(0xB6)
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self.write_data(bytearray([0x0A, 0xA2]))
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# 3Gamma Function Disable
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self.write_cmd(0xF2)
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self.write_data(bytearray([0x00]))
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# Gamma curve selected
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self.write_cmd(0x26)
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self.write_data(bytearray([0x01]))
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# Set Gamma
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self.write_cmd(0xE0)
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self.write_data(
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bytearray(
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[
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0x0F,
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0x2A,
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0x28,
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0x08,
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0x0E,
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0x08,
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0x54,
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0xA9,
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0x43,
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0x0A,
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0x0F,
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0x00,
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0x00,
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0x00,
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0x00,
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]
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)
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)
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# Set Gamma
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self.write_cmd(0xE1)
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self.write_data(
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bytearray(
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[
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0x00,
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0x15,
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0x17,
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0x07,
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0x11,
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0x06,
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0x2B,
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0x56,
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0x3C,
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0x05,
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0x10,
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0x0F,
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0x3F,
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0x3F,
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0x0F,
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]
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)
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)
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# Exit Sleep
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self.write_cmd(0x11)
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time.sleep_ms(120)
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# Display on
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self.write_cmd(0x29)
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time.sleep_ms(500)
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self.fill(0)
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def show(self):
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# set col
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self.write_cmd(0x2A)
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self.write_data(bytearray([0x00, 0x00]))
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self.write_data(bytearray([0x00, 0xEF]))
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# set page
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self.write_cmd(0x2B)
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self.write_data(bytearray([0x00, 0x00]))
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self.write_data(bytearray([0x01, 0x3F]))
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self.write_cmd(0x2C)
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num_of_pixels = self.height * self.width
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for row in range(0, self.pages):
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for pixel_pos in range(0, 8):
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for col in range(0, self.width):
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compressed_pixel = self.buffer[row * 240 + col]
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if ((compressed_pixel >> pixel_pos) & 0x1) == 0:
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self.write_data(bytearray([0x00, 0x00]))
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else:
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self.write_data(bytearray([0xFF, 0xFF]))
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def fill(self, col):
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self.framebuf.fill(col)
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def pixel(self, x, y, col):
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self.framebuf.pixel(x, y, col)
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def scroll(self, dx, dy):
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self.framebuf.scroll(dx, dy)
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def text(self, string, x, y, col=1):
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self.framebuf.text(string, x, y, col)
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def write_cmd(self, cmd):
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self.dc.low()
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self.cs.low()
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self.spi.write(bytearray([cmd]))
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self.cs.high()
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def write_data(self, buf):
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self.dc.high()
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self.cs.low()
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self.spi.write(buf)
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self.cs.high()
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