Test_ifnonnull

说明：  纯数字电路实现打地鼠游戏，有积分功能，可以制作电路板，用的简单原件，LED，按钮等(Pure digital circuit to achieve hamster game, with integral function, can make circuit boards, simple original, LED, buttons, etc.)

dac using pwm this is done for the controller tms 2808

① 设计进程控制块PCB表结构，分别适用于优先数调度算法和循环轮转调度算法。 ②建立进程就绪队列。对两种不同算法编制入队子程序。 ③编制两种进程调度算法：1）优先数调度；2）循环轮转调度 (① design process control block PCB table structure, respectively, for priority scheduling algorithm and round-robin scheduling algorithm. ② establish a process ready queue. Two different algorithms for the preparation of subroutine into the team. ③ preparing two kinds of process scheduling algorithm: 1) priority scheduling 2) round-robin scheduling)

说明：  简单的PWM捕获，初学者比较适合。看看就好啦(Simple PWM capture, beginners are more suitable. Just look at it.)

开发环境是IAR, 是作用于MSP430F449的一个实验程序通过口线模拟IIC总线操作EEPROM，实验中在EEPROM的地址0x02写数据0x06，然后显示到LED[0],读出的数据显示到LED[1](Development environment is IAR, is the role of an experimental procedure on the MSP430F449 through the oral-wire analog IIC bus operation EEPROM, the experiment in the EEPROM address 0x02 write data 0x06, and then display to the LED [0], read out data to the LED [1 ])

说明：  GPRS多路穿透文件，实现多路链接。性能稳定，工厂可以使用(GPRS Multiplex Penetration File)

智能台灯可以根据光照的亮度自动调节亮度，可以保护大人和孩子的视力。(Intelligent desk lamp can automatically adjust the brightness according to the brightness of light, which can protect the eyes of adults and children.)

正点原子Mini板实验二 按键实验，为新手准备的基础源码，基于C语言，芯片为STM32F103RC(Punctuality atomic Mini board experiment two button experiment, for beginners to prepare the basic source code, based on C language, chip STM32F103RC)

IPTV STANDARD FROM YDT.(2007)

ALIENTEK MINISTM32 实验17 SPI实验(The ALIENTEK MINISTM32 experiment 17 SPI experiments)