AVSVS-15546-01.11.06

使用stm32开发板操作tcs230颜色识别模块 库函数版本 使用开发板为正点原子mini开发板(Use stm32 development board operation tcs230 color recognition module library function version uses the development board for the punctual atom mini development board)

YL_3串行数码管显示时钟，74HC595，8位，显示时分秒，自动计数。(YL_3 serial digital display clock, 74HC595, 8 bit display minutes and seconds, automatic counting.)

本代码是基于标准c8051单片机的时钟打铃程序，主要实现的是数字时钟功能，可对时间进行调整，设定时间定时打铃，并且能随自己意愿调整铃声。(This code is based on the standard c8051 MCU clock bell program, the main achievement is the digital clock feature, which allows time to adjust, set the timer bell time, and can adjust the ring with their wishes.)

单片机万历年电子钟Chip electronic bell million years(Chip electronic bell million years)

DS1990A的C51读写程序(DS1990A read and write procedures for the C51)

lpc1788-1_3_led_os 例程描述： 本例程使用 CooS 实现流水灯。 操作过程： 将代码运行即可，开发板上四个 LED 灯呈现流水灯模式闪烁。(Lpc1788-1_3_led_os Routine Description:   This routine uses CooS to implement a flow light. Operation process:   The code can run, the development board four LED lights show water lights flashing mode.)

在stm32的cpu上移植freertos操作系统，程序在freertos基础上实现了，按键扫描，led灯控制，串口收发处理，定时器中断程序等功能。使用MDK打开工程文件即可。(Stm32 on the cpu transplant freertos operating system, the program freertos based on realized, key scan, led lamp control, serial port transceiver processing, function timer interrupt procedures. MDK can open the project file.)

说明：  键盘程序 1．实验名称 创建一个能够响应键盘的应用程序 (Keyboard 1. Experiment name to create a keyboard to respond to the application)

while(1) {//if(keyenable==1){P1=0x00 P2=0xff }else{P1=0xff P2=0x00 } for(i=3 i<SNAKE+1 i++)x[i]=100 for(i=3 i<SNAKE+1 i++)y[i]=100 //初始化 x[0]=4 y[0]=4 //果子 n=3 //蛇长 n=-1 x[1]=1 y[1]=0 //蛇头 x[2]=0 y[2]=0 //蛇尾1 addx=0 addy=0 //位移偏移 //k=1 while(1){if(keyenable)break timer0(1) } while(1) {timer0(e) if(knock()){e=SPEED break } //判断碰撞 if((x[0]==x[1]+addx)&(y[0]==y[1]+addy)) //是否吃东西

Abstract—Selection combining cascaded with maximum-ratio combining (SC/MRC), which is particularly useful when site diversity is available, combined with low-density parity-check (LDPC) codes is able to combat the effects of fading. The biterror rate (BER) expressions of uncoded SC/MRC and SC/MRC with LDPC codes over an independent and identically distributed Rayleigh-fading channel are derived based on the Gaussian approximation approach. These expressions are also applicable to the selection combining and maximum-ratio combining as special cases. The derived expressions are in good agreement with simulation results and approach the density evolution (DE) thresholds. These expressions are able to achieve a significant reduction in computational time with a reasonable accuracy for analyzing the BER performance as compared to simulations and DE.