GPIO

说明：  硬件STM32F407 L298N电机驱动 实现PWM输入电机驱动来实现电子的转速控制(Hardware STM32F407 L298N motor drive Implementing PWM Input Motor Drive to Realize Electronic Speed Control)

第一章开关电源设计的一般考虑 在设计开关电源之前，应当仔细研究要设计的电源技术要求。现以一个通信电源模块的例子来说 明设计要考虑的问题。该模块的技术规范如下(The first chapter is generally considered switching power supply design before switching power supply design, should carefully study the technical requirements to design power. Now with a communication power module design examples to illustrate the problem to be considered. Technical specifications of the module are as follows)

用示波器测得比较标准的模拟IIC程序。STM32F103(A standard analog IIC program is measured by an oscilloscope. STM32F103)

说明：  它是关于80C51单片机的原理介绍和使用其开发的过程，有具体的实例。(It was introduced on the 80C51 microcontroller and use the principle of its development process, with specific examples.)

48 bit CRC routines These routines can be used to calculate a 48 bit CRC over an array of characters.(48 bit CRC routines These routines can be us ed to calculate a 48 bit CRC over an array of chara cters.)

在IAR环境下编写msp430f4152源码，通过单片机开发板上的按键来控制发光二极管的亮灭。(In the IAR environment to prepare msp430f4152 source, SCM development board buttons to control LED light off.)

名称：门禁模拟 模拟现实中门禁系统，可以输入密码进入也可以呼叫住户，再由住户按下开门按键 实现改密码功能，密码保存在24c02中能保证掉电不丢失密码。八个LED灯分别代表 8家住户，其中开门按键为共用，还带有忘记密码恢复按钮，模拟恢复出厂设置， 显示部分为LCD1602。程序共分为3种模式，分别为 等待输入 密码修改 呼叫住户 3种模式，其中等待输入是主要状态，所以在进入密码修改 呼叫住户模式后如果 长时间没有操作能自己切换到等待输入模式。(Name: Access Analog Simulating real access control system, you can also enter a password to enter the call households, again by pressing the open button households Implement change password function, the password stored in the 24c02 can guarantee non-volatile password. Eight LED lights represent 8 households, which opened the door keys are shared, but also with forgotten password recovery button, analog restore factory settings, Display part LCD1602. Program is divided into three modes, namely, waiting for a password to modify call households 3 modes, which is the main input wait state, so call households entering the password change mode if Their long time operation can be switched to the standby input mode.)

取N卡温度源码例程，程序结合易语言系统核心支持库，通过调用dll文件得到N卡当前温度的功能。(Take N card temperature source routines, programs combine core system easy language support library dll file obtained by calling the current function of the temperature N card .)

说明：  LPC1788 + emWin 方案移植(Lpc1788 + EMWIN solution migration)

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