rc-digittrade

超声波测距仪设计文档，本设计主要是以74LS04和CX20106A为测距模块，DS18B20用于温度补偿，12864液晶显示，HC-SR04为超声波显示板，语音模块由音频功率放大器LM386、语音芯片WT588D、低压差电压调节LM1117组成。(Ultrasonic range finder design documents, the design is mainly based on 74LS04 and CX20106A ranging module, DS18B20 for temperature compensation, 12864 LCD, HC-SR04 ultrasonic display boards, voice module consists of audio power amplifier LM386, voice chip WT588D, LM1117 low dropout voltage regulator components.)

说明：  基于单片机的多路温度采集，有代码有原理图(Multiplex temperature acquisition)

基于STC89C52写的蜂鸣器唱歌程序，可以控制开发板上的蜂鸣器唱歌，适合初学者(Based on the STC89C52 write buzzer singing procedures, can control the development board of the buzzer singing, suitable for beginners)

MSP430F169单片机矩阵键盘扫描程序，用一位共阳数码管显示(MSP430F169 microcontroller matrix keyboard scanning procedures, using a common anode LED display)

生成PWM波的c程序，需要的可以自己下载查看(A C program for generating PWM waves)

This example describes how to configure the HT32_system.(This example can run on HT32F175x/275x Development board.)

这个程序主要告诉我们如何制造一个登录窗口设计的静态文本框。(This program wants to tell us how to ligin a system，and，also tell us how to make a static text。This program wants to tell us how to ligin a system。)

说明：  配合中移onenet网络平台使用 1.修改esp8266.c下的wifi账号及密码 2.修改onenet.c下的PROID、SERIAL和PSWD 2.指令说明： 1.平台侧协议数据： 查询温度：01 03 0001 0001 D5CA 查询湿度：01 03 0002 0001 25CA 3.公式 1.温度：A0 / 100 2.湿度：A0 / 100(Use with China Mobile onenet network platform 1. Modify the wifi account and password under esp8266.c 2. Modify PROID, SERIAL and PSWD under onenet.c 2. Instructions: 1. Platform side protocol data: Query temperature: 01 03 0001 0001 D5CA Query humidity: 01 03 0002 0001 25CA 3. Formula 1. Temperature: A0/100 2. Humidity: A0/100)

Microchip公司的MCP4728是一个带有非易失性存储器(EEPROM)的四路、12位电压输出的数模转换器(DAC)，STC15系列单片机实现12位多路DAC数模转换程序。(Quad-channel, 12-bit, non-volatile, voltage ouput DAC with EEPROM, internal Vref and I2C interface. AEC-Q100 qualified.)

说明：  nrf905模块的无线通信例子，希望有用(Nrf905 module wireless communication example, hope useful)