PWM

51单片机LED流星雨灯，原理： 利用PWM来模似流星雨：将亮度等级分为8个 ，通过改变每一组LED的亮度来达到流星雨效果。因为流星雨是前面亮后面越来越暗，就像一条龙一样，拖着尾巴过来。(51 single LED meteor light, principle: the use PWM to die like a meteor shower: The brightness level is divided into eight, each group by changing the brightness of the LED to achieve the effect of the meteor shower. Because meteor shower is getting back in front of bright dark, like one-stop, like dragging tail over.)

zc706板子原理图，在使用板子时候可以参照设计，使用帮助巨大。(Zc706 board schematic diagram, when using the board can be reference to design, use the help.)

中_大功率EMA伺服控制技术与动态性能研究(EMA in power and dynamic performance servo control technology research)

PMSM 电机FOC控制单片机程序，SPANSION Cortex-M4 单片机(PMSM FOC control sample code)

说明：  东西、南北两干道交于十字路口，各干道有一组红、绿、黄三个指示灯，指挥车辆和行人安全通行。南北方向为主干道，通行时间为35秒；东风方向为支干道，通行时间为25秒。通行时间最后3秒，绿灯灭，黄灯闪烁，黄灯闪烁完毕变更通行车道。通行时间由数字显示器显示，黄灯3秒闪烁不单另计时。 特殊情况控制通行方式控制，用按键开关K1控制主道通行，支道禁行，K2控制支道通行，主道禁行，特殊情况控制通行放行。 有紧急情况时用按键开关K3控制两道均为红灯。(The east-west and North-South arterial roads intersect at the intersection. Each arterial road has a group of red, green and yellow indicator lights to guide vehicles and pedestrians to pass safely. The north-south direction is the main road with a traffic time of 35 seconds; the east direction is the branch road with a traffic time of 25 seconds. At the last 3 seconds of the traffic time, the green light is off, the yellow light is flashing, and the yellow light is flashing to change the traffic lane. The traffic time is displayed by the digital display, and the yellow light flashes for 3 seconds, not only for another time. Under special circumstances, control the way of passage. Use key switch K1 to control the passage of main road, Branch Road, K2 to control the passage of branch road, main road and special circumstances to control the passage and release. In case of emergency, use key switch K3 to control two red lights.)

实现简单的RS232 TO CAN,CAN T0 RS232的数据转换 (Realize a simple RS232 TO CAN, CAN T0 RS232 data conversion)

pic单片机Proteus仿真NEC格式红外，编码，解码，调制三部分(PIC proteus ad da )

可以使用keil软件，利用51单片机实现抢答器功能(Keil software can be used to achieve the use of 51 single-chip Responder function)

利用定时器，产生 可调频的脉冲。。。。。。(The timer can be chirp)

该例程是利用MC9S12DG128中TC0和TC7通道共同完成模拟PWM功能的实例。(The routine is the use of MC9S12DG128 the TC0 and TC7 simulated co-channel PWM function instance.)