DS1306實時時鐘模組-micropython
tags: micropython ds1302
這是廣華電子上的介紹
◎ 時鐘具有能計算2100 年之前的秒、分、時、日、星期、月、年的能力，還有閏年調整的能力
◎ 31 8 位暫存數據存儲RAM
◎ 串行 I/O 口方式使得管腳數量最少
◎ 寬範圍工作電壓2.0 5.5V
◎ 工作電流 2.0V 時,小於300nA
◎ 讀 / 寫時鐘或RAM 數據時有兩種傳送方式單字節傳送和多字節傳送字符組方式
◎ 8 腳DIP 封裝或可選的8 腳SOIC 封裝根據表面裝配
◎ 簡單 3 線接口
◎ 與 TTL 相容Vcc=5V
◎ 雙電源管用於主電源和備份電源供應
◎ 電池：CR2032 電壓3V，電流260mAh
◎ 晶振32.768KHz，匹配電容為6pF
◎ DS1302為8腳直插大晶片，晶片下面有IC座，方便更換及插拔片
6.模塊工作電壓兼容3.3V/5V，可與5V及3.3V單片機連接
◎帶4個定位孔，直徑3.1mm
◎工作溫度：0°～70°
◎ 安裝注意!
1.VCC與GND千萬不要接反，以免燒壞晶片
2.51系列單晶片P0接腳需要連接上拉電阻，如果單晶片沒有連接上拉電阻，可以將數據線接到其他接腳
步驟1:
下載sd1306.py並上傳到微控板上
https://github.com/omarbenhamid/micropython-ds1302-rtc
from machine import Pin
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 _dec2hex(self, dat):
return (dat//10) * 16 + (dat % 10)
def _hex2dec(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 _get_reg(self, reg):
self.cs.value(1)
self._write_byte(reg)
t = self._read_byte()
self.cs.value(0)
return t
def _set_reg(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._set_reg(DS1302_REG_WP, 0)
self._set_reg(reg, dat)
self._set_reg(DS1302_REG_WP, 0x80)
def start(self):
t = self._get_reg(DS1302_REG_SECOND + 1)
self._wr(DS1302_REG_SECOND, t & 0x7f)
def stop(self):
t = self._get_reg(DS1302_REG_SECOND + 1)
self._wr(DS1302_REG_SECOND, t | 0x80)
def second(self, second=None):
if second == None:
return self._hex2dec(self._get_reg(DS1302_REG_SECOND+1)) % 60
else:
self._wr(DS1302_REG_SECOND, self._dec2hex(second % 60))
def minute(self, minute=None):
if minute == None:
return self._hex2dec(self._get_reg(DS1302_REG_MINUTE+1))
else:
self._wr(DS1302_REG_MINUTE, self._dec2hex(minute % 60))
def hour(self, hour=None):
if hour == None:
return self._hex2dec(self._get_reg(DS1302_REG_HOUR+1))
else:
self._wr(DS1302_REG_HOUR, self._dec2hex(hour % 24))
def weekday(self, weekday=None):
if weekday == None:
return self._hex2dec(self._get_reg(DS1302_REG_WEEKDAY+1))
else:
self._wr(DS1302_REG_WEEKDAY, self._dec2hex(weekday % 8))
def day(self, day=None):
if day == None:
return self._hex2dec(self._get_reg(DS1302_REG_DAY+1))
else:
self._wr(DS1302_REG_DAY, self._dec2hex(day % 32))
def month(self, month=None):
if month == None:
return self._hex2dec(self._get_reg(DS1302_REG_MONTH+1))
else:
self._wr(DS1302_REG_MONTH, self._dec2hex(month % 13))
def year(self, year=None):
if year == None:
return self._hex2dec(self._get_reg(DS1302_REG_YEAR+1)) + 2000
else:
self._wr(DS1302_REG_YEAR, self._dec2hex(year % 100))
def date_time(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._get_reg(DS1302_REG_RAM + 1 + (reg % 31)*2)
else:
self._wr(DS1302_REG_RAM + (reg % 31)*2, dat)步驟2:
// DS1302 CLK/SCLK --> 5
// DS1302 DAT/IO --> 4
// DS1302 RST/CE --> 2
// DS1302 VCC --> 3.3v - 5v
// DS1302 GND --> GND步驟3:
上傳程式碼
import ds1302
from machine import PIN_WAKE, Pin
import time
ds = ds1302.DS1302(Pin(5), Pin(4), Pin(2))
while True:
print("Today is {}/{}/{}".format(ds.year(), ds.month(), ds.day()))
print("Time: {}:{}:{}".format(ds.hour(), ds.minute(), ds.second()))
print("="*10)
time.sleep(1)Today is 2021/7/28
Time: 12:19:18
==========
Today is 2021/7/28
Time: 12:19:19
==========
Today is 2021/7/28
Time: 12:19:20
==========
Today is 2021/7/28
Time: 12:19:21
==========步驟4:
再將ssd1306.py下載後並上傳到微控板
步驟5:
oled接線
步驟6:
import ds1302, ssd1306
from machine import PIN_WAKE, Pin
from machine import SoftI2C
import time
width = 128
height = 64
i2c = SoftI2C(scl=Pin(22), sda=Pin(21))
oled = ssd1306.SSD1306_I2C(width, height, i2c)
ds = ds1302.DS1302(Pin(5), Pin(4), Pin(2))
while True:
oled.text(str(ds.year()), 0, 1)
oled.text("/", 30, 1)
oled.text(str(ds.month()), 40, 1)
oled.text("/", 50, 1)
oled.text(str(ds.day()), 60, 1)
oled.text(str(ds.hour()), 30, 30)
oled.text(":", 50, 30)
oled.text(str(ds.minute()), 60, 30)
oled.text(":", 80, 30)
oled.text(str(ds.second()), 90, 30)
oled.show()
time.sleep(1)
