i2c

SIM900开发板配套STM32 GPRS代码(SIM900 STM32 GPRS driver)

介绍了一种SPI从机的接口verilog编码(verilog code for spi slave )

红外报警程序，利用红外发射实现自动报警，当有目标靠近，发出蜂鸣名声(Infrared alarm program)

IEC104规约Server和Client端的源码实现，遥信，遥测，遥调，遥控，总召等等都有，很有参考价值(IEC104 Statute of the Server and Client client source code implementation, remote, telemetry, remote adjustment, remote control, and so have the church always, a good reference value)

the function of the code is like a calculator.Basic calculator may be build by the code.

pic18单片机控制tm1629驱动数码管显示 电力无功补偿(Pic18 single chip microcomputer control tm1629 drive digital tube display Reactive power compensation)

xl系列单片机实验仪演示程序 LCD1602显示 步进电机控制器速度方向圈数可调 LCD1602显示 步进电机控制器速度方向圈数可调 K1－启动与停止步进电机运行 K2－设定步进电机运行圈数 （1-20圈） K3－设定步进电机转动方向 K4－设定步进电机运行速度 步进电机的转速控制分16档，数字越小，转速越快。 7.5度步进电机；周期7.5×4=30度，电机转动一圈需12个周期 资源：p1.0-p1.3接反向器74ls14，输出后接步进电机 p3.7接小喇叭提供按键音, p1.4-p1.7接端口按键：lcd1602插入实验仪(xl Series Singlechip Experiment LCD1602 demo program shows the direction of stepper motor speed controller circle shows the number of adjustable LCD1602 direction stepper motor controller lap speed of a few adjustable K1-start and stop the stepper motor running K2-setting step motor running a few laps (1-20 laps) K3-set stepper motor rotation direction of K4-setting speed of stepper motor stepper motor speed control minutes 16 stalls, the number of smaller, faster the speed. 7.5 degree stepper motor cycle of 7.5 × 4 = 30 degrees, rotating electric lap 12 cycles required resources: p1.0-p1.3 then reverse browser 74ls14, followed by stepper motor output p3.7 then provide a small speaker key tone, p1.4-p1.7 port access keys: lcd1602 insert Tester)

说明：  使用于ＡＶＲ单片机的几种Ｃ语言，大家可以参考一下，以便以后在ＡＶＲ的程序编写中提高自己(used in the AVR several C language, we can make reference to the AVR after the procedure to improve their writing)

this .rar contain source code in basic for avr microcontroller for making drifter device to measure water velocity on the sea surface

使用IO口模拟I2C时序，包括主机、从机时序。(Using IO port simulation I2C timing, including the host, the machine timing.)