watchdog

说明：  基于单片机的学习资料，适合初学者使用，很简单，内容很全(Microcontroller-based learning materials, suitable for beginners to use, very simple, as is all)

HOTEK HT48R30 MCU 做的一个时钟 包括原理图 程序 与液晶图(HOTEK HT48R30 MCU to do a clock, including schematic process diagram with LCD)

STM32F103单片机逆变器源码,大家知道， 市电或其他的交流电可以通过二极管或可控硅的单向导电性整流成直流电供 给需要使用直流电的场合。这种把交流电变换成直流电的过程我们叫做整流，也叫做顺变。 那么逆变呢？我们自然地就会想到，应该就是把直流电变换成交流电的过程。逆变电源就是 相对于整流器而言通过半导体功率开关器件的开通和关断把直流电变换成交流电的这么一 个装置。 逆变电源也叫做逆变器.(STM32F103 microcontroller inverter source, we all know, city power or other AC can be diode or SCR one-way conductivity rectifier into DC power supply For occasions requiring direct current. This process of converting alternating current into direct current is called rectification, which is also called commutation. What about inverting? We naturally think of the process of converting direct current into alternating current. Inverter power is As opposed to a rectifier, the direct current is converted into alternating current through the turn-on and turn off of the semiconductor power switching device Unit. An inverter is also called an inverter)

单片机msp430控制蜂鸣器的声音，通过编写代码用msp430x14x开发版来编写控制程序蜂鸣器报警实验 (Msp430 microcontroller control the buzzer sound, by writing code with msp430x14x Developer Edition to write a control program buzzer alarm test)

关于单片机开发方面的非常难得的书,很强悍的实例开发。(a very rare book on On the microcontroller in the development,the development example is very powerful.)

说明：  国产ARM芯片，GD32F103系列，替代STM32F103系列，I2C采集项目，编译即可通过，多支持国产芯片。(Domestic ARM chip, gd32f103 series, replace STM32F103 series, I2C acquisition project, compile can pass, support domestic chips.)

本程序利用51单片机的定时器中断产生时间信号，同时具有通过按键调节时间的功能，还可设置闹钟(This procedure using 51 single-chip timer interrupt time signal, but also has the functions via buttons adjust the time, but also set the alarm)

STM32F4系列串口接收函数,，程序已测试通过。(void USART1_IRQHandler(void) //串口1中断服务程序 { u8 Res #ifdef OS_TICKS_PER_SEC //如果时钟节拍数定义了,说明要使用ucosII了. OSIntEnter() #endif if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾) { Res =USART_ReceiveData(USART1) //(USART1->DR) //读取接收到的数据 if((USART_RX_STA&0x8000)==0)//接收未完成 { if(USART_RX_STA&0x4000)//接收到了0x0d { if(Res!=0x0a) USART_RX_STA=0 //接收错误,重新开始 else USART_RX_STA|=0x8000 //接收完成了 } else //还没收到0X0D { if(Res==0x0d)USART_RX_STA|=0x4000 else { USART_RX_BUF[USART_RX_STA&0X3FFF]=Res USART_RX_STA++ if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0 //接收数据错误,重新开始接收 } } } } #ifdef OS_TICKS_PER_SEC //如果时钟节拍数定义了,说明要使用ucosII了. OSIntExit() #endif } )

用stm32f103rct6mini板，检测温湿度和气体，DHT11温湿度传感器，MQ-2气体传感器，用TFT LCD显示(Stm32f103rct6mini plate was used to detect temperature and humidity and gas, DHT11 temperature and humidity sensor, mq-2 gas sensor and TFT LCD display)

用51单片机IO口实现SMBUS总线的源程序(With 51 single-chip IO Bus I realize SMbus source)