用micpython写一个ILI9342C驱动程序

ILI9342C是一款常见的TFT LCD[控制器](https://geek.csdn.net/educolumn/39901e2ac3fc8f7138ffb4b585690028?spm=1055.2569.3001.10083)芯片，它可以通过SPI接口与微[控制器](https://geek.csdn.net/educolumn/39901e2ac3fc8f7138ffb4b585690028?spm=1055.2569.3001.10083)通信。以下是一个基本的Micropython ILI9342C驱动程序的示例： ```python from micropython import const import framebuf import time # ILI9342C命令 ILI_NOP = const(0x00) ILI_SWRESET = const(0x01) ILI_RDDID = const(0x04) ILI_RDDST = const(0x09) # 控制寄存器 ILI_SLPIN = const(0x10) ILI_SLPOUT = const(0x11) ILI_PTLON = const(0x12) ILI_NORON = const(0x13) # [显示](https://geek.csdn.net/educolumn/103ca72607c717122e068b9f06a24df6?spm=1055.2569.3001.10083)[窗口](https://geek.csdn.net/educolumn/00d3d1b467be187bf63895f811603770?spm=1055.2569.3001.10083) ILI_CASET = const(0x2A) ILI_PASET = const(0x2B) ILI_RAMWR = const(0x2C) # 颜色格式 ILI_COLMOD = const(0x3A) class ILI9342C(framebuf.FrameBuffer): def __init__(self, spi, cs, dc, rst=None, width=240, height=320): self.spi = spi self.cs = cs self.dc = dc self.rst = rst self.width = width self.height = height self.buffer = bytearray(width * height * 2) su[per](https://geek.csdn.net/educolumn/2c6ed1be7edac16b3c9a0c3228eaff0c?spm=1055.2569.3001.10083)().__init__(self.buffer, width, height, framebuf.RGB565) self.reset() self.init() def reset(self): if self.rst != None: self.rst.value(0) time.sleep_ms(50) self.rst.value(1) time.sleep_ms(50) def init(self): # 初始化步骤1 self.write_cmd(ILI_SWRESET) time.sleep_ms(120) # 初始化步骤2 self.write_cmd(0xEF) self.write_data(0x03) self.write_data(0x80) self.write_data(0x02) # 初始化步骤3 self.write_cmd(0xCF) self.write_data(0x00) self.write_data(0xC1) self.write_data(0x30) # 初始化步骤4 self.write_cmd(0xED) self.write_data(0x64) self.write_data(0x03) self.write_data(0x12) self.write_data(0x81) # 初始化步骤5 self.write_cmd(0xE8) self.write_data(0x85) self.write_data(0x00) self.write_data(0x78) # 初始化步骤6 self.write_cmd(0xCB) self.write_data(0x39) self.write_data(0x2C) self.write_data(0x00) self.write_data(0x34) self.write_data(0x02) # 初始化步骤7 self.write_cmd(0xF7) self.write_data(0x20) # 初始化步骤8 self.write_cmd(0xEA) self.write_data(0x00) self.write_data(0x00) # 初始化步骤9 self.write_cmd(ILI_COLMOD) self.write_data(0x55) # 初始化步骤10 self.write_cmd(ILI_MADCTL) self.write_data(0x48) # 初始化步骤11 self.write_cmd(ILI_SLPOUT) time.sleep_ms(120) # 初始化步骤12 self.write_cmd(ILI_DISPON) def write_cmd(self, cmd): self.dc.value(0) # 发送命令 self.cs.value(0) # 选中芯片 self.spi.write(bytearray([cmd])) self.cs.value(1) # 取消片选 def write_data(self, data): self.dc.value(1) # 发送数据 self.cs.value(0) # 选中芯片 self.spi.write(bytearray([data])) self.cs.value(1) # 取消片选 def show(self): self.write_cmd(ILI_CASET) self.write_data(0) self.write_data(0) self.write_data(self.width >> 8) self.write_data(self.width & 0xFF) self.write_cmd(ILI_PASET) self.write_data(0) self.write_data(0) self.write_data(self.height >> 8) self.write_data(self.height & 0xFF) self.write_cmd(ILI_RAMWR) self.cs.value(1) self.dc.value(1) self.cs.value(0) self.spi.write(self.buffer) self.cs.value(1)