Introduction
stm32f103 RTC perpetual calendar project.
GitHub link: https://github.com/RedandBlackyang/RTC_wannianli
If you find it easy to use, remember to light up the little stars~~
The code comments will be perfect in the follow-up, everyone will continue to pay attention~ (but I Lazy)
Burning introduction
It is recommended to use wildfire's stm32 board (guide or overbearing for burning).
In order for Chinese characters to be displayed normally on OLED, you need to burn a new font file GB2312_H1616.FON. This font file is suitable for the way of writing OLED pages (different from the font file that comes with Wildfire, and the modulus is different). srcdata need to file in the project folder into the root of the sd card, and then use the official routines wildfires 刷外部FLASH程序（如何恢复出厂内容）were burning.
Key operation introduction
In order to meet the compact design of the clock, 4 buttons are used for control. They are next, ok, back and serial calibration trigger buttons.
Next is used to select the next function item, the ok key means to confirm the selection, and back returns to the previous page.
Features
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RTC real time clock
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Year, month, day, hour, minute and second can be set by keys
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Stopwatch timing function
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Timed alarm function
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Display year, month, day, hour, minute, second, week and lunar calendar (the lunar calendar is automatically updated according to the date)
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Graphic display clock
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Use temperature and humidity sensors to measure and display ambient temperature and humidity
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Can use computer serial port for time synchronization
Pin correspondence
keyUse matrix keyboard, use one row and four columns for interrupt trigger
Line 1 R1 --> PC10
Column 1 C1 --> PC6
Column 2 C2 --> PC7
Column 3 C3 --> PC8
Column 4 C4 --> PC9
DHT11 温湿度传感器
VCC --> 3.3V
DATA --> PE6
GND --> GND
IIC oled 0.96寸屏幕
Use IIC1
GND --> GND
VCC --> 3.3V
SCL --> PB6
SDA -> PB7