在51单片机上实现的完整功能的计算器源代码，用c写成.

Used to display a hexadecimal value in 7 segment LED display using an interrupt in PORTB upper 4 bits.

CAN总线控制，SJA1000基本操作，keilC51开发环境-CAN bus control, SJA1000 basic operation, keilC51 Development Environment

以比较匹配A达到时交替输出高低电平及写入其维持 时间常数之方法实现脉宽调制输出-to compare A match reached the turn at the high output and low-level maintenance time into their methods to achieve constant PWM Output

USB程序源代码,包括PC端和单片机端.USB控制芯片为PIDUSBD12.-USB source code, including the PC client and single-chip client. USB controller chip for PIDUSBD12.

说明：此程序使用标准PS2键盘输入，LCD1602液晶屏输出显示。此样例仅作测试使用 晶振使用12M或者11.0592M,本键盘使用部分字母和数字测试，其他按键不能使用，用 户可以自行扩展。由于开发板和程序的各种参数，程序中没有使用奇偶校验，不保证没有 误码,校验程序请自行添加。-Description: This program uses the standard PS2 keyboard input, LCD1602 LCD output display. This sample is only used for testing the use of crystal 12M or 11.0592M, this keyboard to use part of letters and numbers tests, other buttons can not be used, users can expand their own. As the development board and procedures for various parameters, the program does not use parity, does not guarantee that there is no error, verification procedures to add your own.

ch451的使用，遇到问题可以参考 做spi驱动-ch451 use problems can refer to make spi driver

步进电机控制程序，已测，绝对好用！大家来下载-Stepper motor control procedures have been measured, the absolute ease of use! U.S. to download

51MCU在KEILUV3下开发的源代码，包括全部工程文件-51MCU in KEILUV3 developed source code, including all engineering documents

用于motor控制的dispic实现-for motor control to achieve dispic

芯片HT1623驱动段码液晶屏显示；通过开辟显存区；利中断定时刷新三排数码管显示；-Chip HT1623 Drive Segment LCD display through the creation of memory area Lee interrupted refresh three rows of digital tube display