[树莓派]PICO基础使用_微雪OLED显示

简介

Raspberry Pi Pico是具有灵活数字接口的低成本，高性能微控制器板。它集成了Raspberry Pi自己的RP2040微控制器芯片，运行速度高达133 MHz的双核Arm Cortex M0 +处理器，嵌入式264KB SRAM和2MB板载闪存以及26个多功能GPIO引脚。对于软件开发，可以使用Raspberry Pi的C / C ++ SDK或MicroPython。

规格参数

• 双核 Arm Cortex-M0 + @ 133MHz

• 芯片内置 264KB SRAM 和 2MB 的板载闪存

• 通过专用 QSPI 总线支持最高 16MB 的片外闪存

• DMA 控制器

• 30 个 GPIO 引脚，其中 4 个可用作模拟输入

• 2 个 UART、2 个 SPI 控制器和 2 个 I2C 控制器

• 16 个 PWM 通道

• USB 1.1 主机和设备支持

• 8 个树莓派可编程 I/O（PIO）状态机，用于自定义外围设备支持

• 支持 UF2 的 USB 大容量存储启动模式，用于拖放式编程

引脚图

基础配置 安装micropython

将pico通过usb连接至电脑，此时电脑会多出一个 RPI-RP2的文件夹，文件夹中有一个index.htm文件，用浏览器打开重定向至树莓派官网，进入micropython模块，下载UF2文件。

将UF2文件拖入Pico的RPI-RP2文件夹，pico将以micropython模式启动。

配置 Thonny IDE

Thonny IDE下载

进入工具->设置-> 解释器，选择MicroPython(Raspberry Pi Pico)解释器

勾选 视图->文件，可以显示pico中的文件，勾选视图->shell，可以显示pico的命令行模式

此时我们可以开始编写代码，写完后按住ctrl+s将该文件保存在树莓派PICO上，并命名为main.py，运行之后：

基础程序：

1. 点亮板载led灯

from machine import Pin if __name__ == '__main__': # 构建led对象 # 板载LED灯连接与引脚25相连 # LED = Pin(id, mode, pull) # id:PICO引脚编号 # mode:输入输出方式，有Pin.IN(输入)和Pin.OUT(输出)两种 # pull:上下拉电阻配置，有None(无上下拉电阻)、Pin.PULL_UP(上拉电阻)和Pin.PULL_DOWN(下拉电阻)三种 LED = Pin(25, Pin.OUT) # 高电平点亮 LED.value(1) 

1. 板载led闪烁

from machine import Pin from utime import sleep import utime

led = Pin(25, Pin.OUT) if __name__ == '__main__': while True: # led点亮 led.value(1) utime.sleep_ms(1000) # led熄灭 led.value(0) utime.sleep_ms(1000) 

pico+微雪OLED 1.3

屏幕和oled连接，输入示例代码

from machine import Pin,SPI import framebuf import time

DC = 8 RST = 12 MOSI = 11 SCK = 10 CS = 9 class OLED_1inch3(framebuf.FrameBuffer): def __init__(self): self.width = 128 self.height = 64 self.cs = Pin(CS,Pin.OUT) self.rst = Pin(RST,Pin.OUT) self.cs(1) self.spi = SPI(1) self.spi = SPI(1,2000_000) self.spi = SPI(1,20000_000,polarity=0, phase=0,sck=Pin(SCK),mosi=Pin(MOSI),miso=None) self.dc = Pin(DC,Pin.OUT) self.dc(1) self.buffer = bytearray(self.height * self.width // 8) super().__init__(self.buffer, self.width, self.height, framebuf.MONO_HMSB) self.init_display() self.white = 0xffff self.balck = 0x0000 def write_cmd(self, cmd): self.cs(1) self.dc(0) self.cs(0) self.spi.write(bytearray([cmd])) self.cs(1) def write_data(self, buf): self.cs(1) self.dc(1) self.cs(0) self.spi.write(bytearray([buf])) self.cs(1) def init_display(self): """Initialize dispaly""" self.rst(1) time.sleep(0.001) self.rst(0) time.sleep(0.01) self.rst(1) self.write_cmd(0xAE)#turn off OLED display self.write_cmd(0x00) #set lower column address self.write_cmd(0x10) #set higher column address  self.write_cmd(0xB0) #set page address  self.write_cmd(0xdc) #et display start line  self.write_cmd(0x00) self.write_cmd(0x81) #contract control  self.write_cmd(0x6f) #128 self.write_cmd(0x21) # Set Memory addressing mode (0x20/0x21) # self.write_cmd(0xa0) #set segment remap  self.write_cmd(0xc0) #Com scan direction self.write_cmd(0xa4) #Disable Entire Display On (0xA4/0xA5)  self.write_cmd(0xa6) #normal / reverse self.write_cmd(0xa8) #multiplex ratio  self.write_cmd(0x3f) #duty = 1/64 self.write_cmd(0xd3) #set display offset  self.write_cmd(0x60) self.write_cmd(0xd5) #set osc division  self.write_cmd(0x41) self.write_cmd(0xd9) #set pre-charge period self.write_cmd(0x22) self.write_cmd(0xdb) #set vcomh  self.write_cmd(0x35) self.write_cmd(0xad) #set charge pump enable  self.write_cmd(0x8a) #Set DC-DC enable (a=0:disable; a=1:enable) self.write_cmd(0XAF) def show(self): self.write_cmd(0xb0) for page in range(0,64): self.column = 63 - page              
            self.write_cmd(0x00 + (self.column & 0x0f)) self.write_cmd(0x10 + (self.column >> 4)) for num in range(0,16): self.write_data(self.buffer[page*16+num]) if __name__=='__main__': OLED = OLED_1inch3() OLED.fill(0x0000) OLED.show() OLED.rect(0,0,128,64,OLED.white) time.sleep(0.5) OLED.show() OLED.rect(10,22,20,20,OLED.white) time.sleep(0.5) OLED.show() OLED.fill_rect(40,22,20,20,OLED.white) time.sleep(0.5) OLED.show() OLED.rect(70,22,20,20,OLED.white) time.sleep(0.5) OLED.show() OLED.fill_rect(100,22,20,20,OLED.white) time.sleep(0.5) OLED.show() time.sleep(1) OLED.fill(0x0000) OLED.line(0,0,5,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(0,0,20,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(0,0,35,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(0,0,65,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(0,0,95,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(0,0,125,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(0,0,125,41,OLED.white) OLED.show() time.sleep(0.1) OLED.line(0,0,125,21,OLED.white) OLED.show() time.sleep(0.01) OLED.line(0,0,125,3,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,125,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,110,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,95,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,65,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,35,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,1,64,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,1,44,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,1,24,OLED.white) OLED.show() time.sleep(0.01) OLED.line(127,1,1,3,OLED.white) OLED.show() time.sleep(1) OLED.fill(0x0000) OLED.text("128 x 64 Pixels",1,10,OLED.white) OLED.text("Pico-OLED-1.3",1,27,OLED.white) OLED.text("SH1107",1,44,OLED.white) OLED.show() time.sleep(1) OLED.fill(0x0000) keyA = Pin(15,Pin.IN,Pin.PULL_UP) keyB = Pin(17,Pin.IN,Pin.PULL_UP) while(1): if keyA.value() == 0: OLED.fill_rect(0,0,128,20,OLED.white) print("A") else : OLED.fill_rect(0,0,128,20,OLED.balck) if(keyB.value() == 0): OLED.fill_rect(0,44,128,20,OLED.white) print("B") else : OLED.fill_rect(0,44,128,20,OLED.balck) OLED.fill_rect(0,22,128,20,OLED.white) OLED.text("lm.snakin.top",0,28,OLED.balck) OLED.show() time.sleep(1) OLED.fill(0xFFFF) 

最后使用thonny运行即可，之后可以根据示例代码自行更改显示效果。