(时钟芯片)模拟I2C操作的DS3231

/********************************** 晶振:11.0592M 模拟I2C总线操作DS3231 /**********************************/ #include <iom128v.h> #include <macros.h> #include “lcd.c” #define uchar unsigned char #define uint  unsigned int #define SCL_H  PORTD|=(1<<0) #define SCL_L  PORTD&=~(1<<0) #define SDA_H  PORTD|=(1<<1) #define SDA_L  PORTD&=~(1<<1)

QR code

QR code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional code) first designed for the automotive industry. More recently, the system has become popular outside the industry due to its fast readability and large storage capacity compared to standard UPC barcodes. The code consists of black modules (square …

二维码

二维码 ,又称二维条码,二维条形码最早发明于日本,它是用某种特定的几何图形按一定规律在平面(二维方向上)分布的黑白相间的图形记录数据符号信息的,在代码编制上巧妙地利用构成计算机内部逻辑基础的“0”、“1”比特流的概念,使用若干个与二进制相对应的几何形体来表示文字数值信息,通过图象输入设备或光电扫描设备自动识读以实现信息自动处理。它具有条码技术的一些共性:每种码制有其特定的字符集;每个字符占有一定的宽度;具有一定的校验功能等。同时还具有对不同行的信息自动识别功能、及处理图形旋转变化等特点。

Manchester Code

In telecommunication and data storage, Manchester coding (also known as Phase Encoding, or PE) is a line code in which the encoding of each data bit has at least one transition and occupies the same time. It therefore has no DC component, and is self-clocking, which means that it may be inductively or capacitively coupled, and that a clock signal can be recovered from …