10、I2C总线接口项目实践

隐层游民

于 2025-09-08 15:17:50 发布

阅读量34

点赞数

CC 4.0 BY-SA版权

分类专栏：树莓派Pico实战指南文章标签： I2C总线 MCP23017 EEPROM

本文链接：https://blog.youkuaiyun.com/efc123456/article/details/152020549

树莓派Pico实战指南专栏收录该内容

26 篇文章 ¥499.90

订阅专栏¥69.90

会员秒杀 ¥9.9 重磅福利

超级会员免费看

I2C总线接口项目实践

1. MCP23017端口扩展器项目

1.1 项目概述

此项目运用MCP23017端口扩展器芯片，将一个LED连接到端口扩展器的GPA0引脚，使该LED每秒闪烁一次。

1.2 代码实现

#----------------------------------------------------------
#              I2C PORT EXPANDER
#              =================
#
# In this project the MCP23017 port expander chip is used.
# An LED is connected to port pin GPA0 of the port expander
# and this LED is flashed every second
#
# This version of the program uses the i2c memory functions
#
# Author: Dogan Ibrahim
# File  : MCP23017-2.py
# Date  : February 2021
#------------------------------------------------------------
from machine import Pin,I2C
import utime
i2c = machine.I2C(0, scl=Pin(9), sda=Pin(8), freq=100000)
print("i2c address=