代码仓库
1、码云Gitee：https://gitee.com/yangkun_monster/clock.git
2、Github：https://github.com/pifan-open-source-community/clock.git
视频教程地址：
哔哩哔哩bilibili：树莓派爱好者基地、玩派VLOG
视频VLOG记录：
哔哩哔哩bilibili：玩派VLOG
用树莓派PICO做一个桌面时钟，可显示年、月、日、时、分、秒、星期、温度、湿度。时钟分为两种，一种是使用内置RTC函数，另一种是使用DS1302时钟模块，可以根据自己情况选择（时钟模块具有备用电池，可以保证在断电的情况下持续走时）
编程语言： micropython。
DHT11是一款有已校准数字信号输出的温湿度传感器。 其精度湿度±5%RH， 温度±2℃，量程湿度5~95%RH， 温度-20～+60℃。
DS1302时钟芯片是由美国DALLAS公司推出的具有涓细电流充电能力的低功耗实时时钟芯片。它可以对年、月、日、周、时、分、秒进行计时，且具有闰年补偿等多种功能。DS1302芯片包含一个用于存储实时时钟/日历的 31 字节的静态 RAM，可通过简单的串行接口与微处理器通讯，将当前的是时钟存于RAM。DS1302芯片对于少于 31 天的月份月末会自动调整,并会自动对闰年进行校正。
面包板
公对母杜邦线
| DTH11 | |
|---|---|
| VCC | |
| GND | |
| DATA | GP0 |
| SSD1306 | |
|---|---|
| VCC | |
| GND | |
| SCL | GP3 |
| SDA | GP2 |
| DS1302 | |
|---|---|
| VCC | |
| GND | |
| CLK | GP12 |
| DAT | GP13 |
| RST | GP14 |
该时钟在PICO连接电脑使用时可以自动读取电脑的时间，在PICO断电后时钟会暂停，不能持续走时。
from machine import RTC
from machine import Pin
from machine import I2C
from ssd1306 import SSD1306_I2C
from machine import Timer
import dht
def clock_time(tim):
timee=clockk.datetime()
oled.fill(0)
oled.text("Date:",0,0)
oled.text(str(timee[0])+'-'+str(timee[1])+'-'+str(timee[2])+'-'+week[timee[3]],0,10)
oled.text(str(timee[4])+'-'+str(timee[5])+'-'+str(timee[6]),0,20)
d.measure()
oled.text("Temperature:"+str(d.temperature())+'C',0,40)
oled.text("Humidity:"+str(d.humidity())+'%',0,50)
oled.show()
i2c=I2C(1,sda=Pin(2),scl=Pin(3))
oled=SSD1306_I2C(128,64,i2c,addr=0X3c)
week=['Mon','Tues','Wed','Thur','Fri','Sat','Sun']
clockk=RTC()
#clockk.datetime((2022,10,30,6,17,25,0,0))#设置初始时间，年、月、日、星期、时、分、秒
d=dht.DHT11(Pin(0))
tim=Timer(-1)
tim.init(period=300,mode=Timer.PERIODIC,callback=clock_time)
时钟模块具有备用电池，可以保证在断电的情况下持续走时
主程序
from machine import Pin
from machine import I2C
from ssd1306 import SSD1306_I2C
from machine import Timer
import dht
from DS1302 import DS1302
def clock_time(tim):
timee=ds.DateTime()
oled.fill(0)
oled.text("Date:",0,0)
oled.text(str(timee[0])+'-'+str(timee[1])+'-'+str(timee[2])+'-'+week[timee[3]],0,10)
oled.text(str(timee[4])+'-'+str(timee[5])+'-'+str(timee[6]),0,20)
d.measure()
oled.text("Temperature:"+str(d.temperature())+'C',0,40)
oled.text("Humidity:"+str(d.humidity())+'%',0,50)
oled.show()
i2c=I2C(1,sda=Pin(2),scl=Pin(3))
oled=SSD1306_I2C(128,64,i2c,addr=0X3c)
week=['Mon','Tues','Wed','Thur','Fri','Sat','Sun']
d=dht.DHT11(Pin(0))
ds = DS1302(Pin(12),Pin(13),Pin(14))
#ds.SetTime(2022,11,12,5,20,03,30)#设置初始时间，年、月、日、星期、时、分、秒
tim=Timer(-1)
tim.init(period=300,mode=Timer.PERIODIC,callback=clock_time)DS1302库
'''
DS1302 RTC drive
Author: shaoziyang
Date: 2018.3
http://www.micropython.org.cn
'''
from machine import *
DS1302_REG_SECOND = (0x80)
DS1302_REG_MINUTE = (0x82)
DS1302_REG_HOUR = (0x84)
DS1302_REG_DAY = (0x86)
DS1302_REG_MONTH = (0x88)
DS1302_REG_WEEKDAY= (0x8A)
DS1302_REG_YEAR = (0x8C)
DS1302_REG_WP = (0x8E)
DS1302_REG_CTRL = (0x90)
DS1302_REG_RAM = (0xC0)
class DS1302:
def __init__(self, clk, dio, cs):
self.clk = clk
self.dio = dio
self.cs = cs
self.clk.init(Pin.OUT)
self.cs.init(Pin.OUT)
def DecToHex(self, dat):
return (dat//10) * 16 + (dat%10)
def HexToDec(self, dat):
return (dat//16) * 10 + (dat%16)
def write_byte(self, dat):
self.dio.init(Pin.OUT)
for i in range(8):
self.dio.value((dat >> i) & 1)
self.clk.value(1)
self.clk.value(0)
def read_byte(self):
d = 0
self.dio.init(Pin.IN)
for i in range(8):
d = d | (self.dio.value()<<i)
self.clk.value(1)
self.clk.value(0)
return d
def getReg(self, reg):
self.cs.value(1)
self.write_byte(reg)
t = self.read_byte()
self.cs.value(0)
return t
def setReg(self, reg, dat):
self.cs.value(1)
self.write_byte(reg)
self.write_byte(dat)
self.cs.value(0)
def wr(self, reg, dat):
self.setReg(DS1302_REG_WP, 0)
self.setReg(reg, dat)
self.setReg(DS1302_REG_WP, 0x80)
def start(self):
t = self.getReg(DS1302_REG_SECOND + 1)
self.wr(DS1302_REG_SECOND, t & 0x7f)
def stop(self):
t = self.getReg(DS1302_REG_SECOND + 1)
self.wr(DS1302_REG_SECOND, t | 0x80)
def Second(self, second = None):
if second == None:
return self.HexToDec(self.getReg(DS1302_REG_SECOND+1))%60
else:
self.wr(DS1302_REG_SECOND, self.DecToHex(second%60))
def Minute(self, minute = None):
if minute == None:
return self.HexToDec(self.getReg(DS1302_REG_MINUTE+1))
else:
self.wr(DS1302_REG_MINUTE, self.DecToHex(minute%60))
def Hour(self, hour = None):
if hour == None:
return self.HexToDec(self.getReg(DS1302_REG_HOUR+1))
else:
self.wr(DS1302_REG_HOUR, self.DecToHex(hour%24))
def Weekday(self, weekday = None):
if weekday == None:
return self.HexToDec(self.getReg(DS1302_REG_WEEKDAY+1))
else:
self.wr(DS1302_REG_WEEKDAY, self.DecToHex(weekday%8))
def Day(self, day = None):
if day == None:
return self.HexToDec(self.getReg(DS1302_REG_DAY+1))
else:
self.wr(DS1302_REG_DAY, self.DecToHex(day%32))
def Month(self, month = None):
if month == None:
return self.HexToDec(self.getReg(DS1302_REG_MONTH+1))
else:
self.wr(DS1302_REG_MONTH, self.DecToHex(month%13))
def Year(self, year = None):
if year == None:
return self.HexToDec(self.getReg(DS1302_REG_YEAR+1)) + 2000
else:
self.wr(DS1302_REG_YEAR, self.DecToHex(year%100))
def DateTime(self, dat = None):
if dat == None:
return [self.Year(), self.Month(), self.Day(), self.Weekday(), self.Hour(), self.Minute(), self.Second()]
else:
self.Year(dat[0])
self.Month(dat[1])
self.Day(dat[2])
self.Weekday(dat[3])
self.Hour(dat[4])
self.Minute(dat[5])
self.Second(dat[6])
def ram(self, reg, dat = None):
if dat == None:
return self.getReg(DS1302_REG_RAM + 1 + (reg%31)*2)
else:
self.wr(DS1302_REG_RAM + (reg%31)*2, dat)
def SetTime(self,YEAR,MONTH,DAY,WEEK,HOUR,MINUTE,SECOND,):
self.Year(YEAR)
self.Month(MONTH)
self.Day(DAY)
self.Weekday(WEEK)
self.Hour(HOUR)
self.Minute(MINUTE)
self.Second(SECOND)
