petroll泵检测电源三相蜂鸣器系统

单片机读写U盘程序，包含FAT32文件系统和U盘枚举过程-U disk read and write single-chip process

用em4094和STC12C5412合成二代证读写器，该文中有完全原理图和软件设计思路 -Synthesis of second generation with the em4094 and STC12C5412 card reader, the text has full schematics and software design ideas

code for c30 compiler for interfacing DsPic30F4011_and_eeprom_24c02 via i2C

motor speed by pwm this depond on that the pwm has t on and t off and t ther is a duty cycle that = ton / t this vary the average voltage across the moto-motor speed by pwm this depond on that the pwm has t on and t off and t ther is a duty cycle that = ton/t this vary the average voltage across the moto

这是一个用AT89C51制作的2.4G频率计的源程序-this is a 2.4GHz frequency tester s program for AT89C51

用verilog写的跑表程序--Stopwatch program written by verilog.

sim卡操作驱动程序。有完善的冷复位，ATR解析，PPS参数调整等等内容。

基本成功。 收到数据时，能点亮一个led。 单片机 STC12C5260S2   1T 延时用的是单片机小精灵 stc1T 模式编写 2011.1.8上午，发送程序已做部分优化，优化了延时，使延时更加短。 2011.1.8下午，接收程序已做部分优化，优化了延时，使延时更加短。 2011.1.9晚上定稿。此程序全部用查询法，此后将进行优化，用中断进行处理。 ///////////////////////////////////////// /////////////////////////////////////////

10进制to BCD转换算法-Decimal to BCD conversion algorithm

Part III Figure 2a shows a circuit for a full adder, which has the inputs a, b, and ci, and produces the outputs s and co. Parts b and c of the figure show a circuit symbol and truth table for the full adder, which produces the two-bit binary sum cos = a + b + ci. Figure 2d shows how four instances of this full adder entity can be used to design a circuit that adds two four-bit numbers. This type of circuit is usually called a ripple-carry adder, because of the way that the carry signals are passed from one full adder to the next. Write VHDL code that implements this circuit, as described below. 2