23、树莓派Pico的I2C总线接口项目实践

最新推荐文章于 2025-09-26 14:25:59 发布

最新推荐文章于 2025-09-26 14:25:59 发布

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分类专栏：玩转树莓派Pico 文章标签：树莓派Pico I2C总线 MCP23017

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树莓派Pico的I2C总线接口项目实践

1. MCP23017端口扩展器项目

MCP23017端口扩展器项目可进行修改以使用I2C的内存功能。以下是修改后的代码：

#----------------------------------------------------------
#              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=",i2c.scan())
Device_Address = 0x20