minipad_0

介绍一种具有短信息无线通讯功能的低功耗嵌入式多参数监护仪，基于ARM7核的32位低功耗微处理器作为系统控制核心，采用源码公开的嵌入式操作系统IxC／OS—II，通过低功耗的16位单片机MSP430完成数据采集，可实现心电、血氧、血压、体温信号的实时监测。系统采用西门子MC35i无线传输模块，实现生理参数以SMS方式无线传输，具有轻便节能、安全稳定等优点(Introduce a short message wireless communication function of low-power embedded multi-parameter monitor, based on the ARM7 core 32-bit low-power microprocessor system control as a core, using open-source embedded operating system IxC/OS- II, through the low-power 16-bit single-chip MSP430 achieve data acquisition, can achieve ECG, blood oxygen, blood pressure, body temperature signals in real-time monitoring. Siemens MC35i system uses wireless transmission module, physiological parameters in order to realize the way SMS wireless transmission, with a light energy saving, security and stability, etc.)

红外报警器的c代码。 基于清翔电子的c51单片机最小开发板开发，代码带有注释。如果不布置外围红外电路，IO口检测到低电平触发蜂鸣器报警。必须有液晶1602才能正常运行程序，不然需要注释掉LCD相关代码。(Infrared alarm c code. Based on Qingxiang electronic C51 microcontroller development board, the code with notes. If the peripheral infrared circuit is not arranged, the low level trigger buzzer alarm is detected at the IO port. There must be liquid crystal 1602 to run the program normally, otherwise you need to annotate the LCD related code.)

本例展示了如何设置TIM，用它来测量一个外部输入信号的频率和占空比。 TIM2时钟设置为72MHz，预分频设置为0，TIM2计数器时钟可表达为： TIM2 counter clock = TIMxCLK / (Prescaler +1) = 72 MHz，因此可测量的最小频率值为1100Hz。 设置TIM2工作在PWM输入模式（PWM Input Mode），把外部信号作为输入连接到TIM2通道2。 利用TIM2计数器中断来测量信号的频率和占空比。在TIM2_IRQHandler中，计算信号的频率和占空比，方法如下： 变量"Frequency"为由下式得到的外部信号频率： Frequency = TIM2 counter clock / TIM2_CCR2 单位Hz 变量"Duty_Cycle"为由下式得到的外部信号占空比： Duty_Cycle = (TIM2_CCR1*100)/(TIM2_CCR2) 单位 (This example shows how to set up the TIM, and use it to measure the frequency and duty cycle of an external input signal. TIM2 clock set to 72MHz and the prescaler is set to 0, TIM2 is counter clock can be expressed as: TIM2 is counter clock = TIMxCLK/(prescaler. Ppls1) = 72 MHz, the minimum measurable frequency value of 1100 Hz. Set TIM2 PWM input mode (PWM Input Mode), the external signal as an input connected to the the TIM2 Channel 2. TIM2 counter interrupt signal to measure frequency and duty cycle. Calculate the frequency and duty cycle of the signal in TIM2_IRQHandler as follows: variable " Frequency" on the grounds of the external signal frequency by the following formula: Frequency = TIM2 is counter clock/TIM2_CCR2 unit Hz variable Duty_Cycle " on the grounds of the following formula to get external duty cycle: Duty_Cycle = (TIM2_CCR1* 100)/(TIM2_CCR2) in )

protel LIB 原理图库文件，包含常用元件及stc单片机元件图。(protel LIB)

说明：  定时器的使用，让你了解使用定时器所必须的几个步骤！从而能够使用(the use of timers let you know by the use of timers to be a few steps! In order to use)

1、学习目的：利用定时器产生PWM，了解原理和使用方法 2、硬件要求：直流电机 定时器 3、试验现象：按键调速，PWM部分显示速度档位，电机根据档位调节速度 这个需要把电机驱动输入端和PWM端连接起来(1 Learning Objectives: To use the timer to generate PWM, to understand the principles and use, hardware requirements: DC Timer 3, the experimental phenomenon: button speed control, the PWM section shows speed gear, the motor stalls adjust the speed the motor drive input and PWM connect)

这是我认为51汇编里面比较好理解的书籍，以及我简单整理的汇编指令文档一份。入门学习还是不错的。(This is a book that I think is better understood in the 51 assembly, as well as a document of assembly instructions that I simply organized. Initial study is still good.)

附件为LabVIEW的vi程序和说明文档。描述：利用LabVIEW2012设计PID控制器，利用PID工具包，在LabVIEW仿真工具包中的控件与仿真循环中搭建PID控制器,并实现了闭环控制系统波形图的显示。(Attachments are the LabVIEW vi program and the documentation for PID controller design. The program includes the PID controller constructing and the closed-loop system output display.)

说明：  单片机c8051f120使用DAC生成正弦和余弦波形例程，内带说明(SCM c8051f120 generated using the sine and cosine waveform DAC routines, which take note)

说明：  基于stc15的电子密码锁设计，带原理图(Design of electronic password lock based on stc15 with schematic diagram)