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ARM7通过PWM控制步进电机的小程序，试验通过(ARM7 PWM control stepper motor procedures, test by)

STM32F103的心电测试程序，经过测试，绝对可用。(the test code for STM32F103.)

基于NXP公司的ARM7芯片LPC2148的IAP模块的程序，在Keil4上编译通过(NXP' s ARM7 chip LPC2148 IAP module-based program, compiled by the Keil4)

说明：  ESP8266 - STM32f407disc1 interface for communications & configurations.

AD 转换的DMA模式 值得一试 有别与其他操作(AD conversion DMA mode)

Embedded System Application Development and Labs Textbook is compounded with the Embest ARM Development System that was developed by Embst Inc. at Shenzhen, China. Any reader who is interested in using the Embest development tools for ARM can contact Embest Inc. The following is the Embest contact information

说明：  此游戏是在STM32F407上开发的一款简易版贪吃蛇游戏，具有设置功能，可以调节蛇与食物颜色，还具有调节声音，暂停等功能。(This game is a simple version of Snake Eating game developed on STM32F407. It has setting function, can adjust the color of snake and food, and also has the functions of adjusting sound and pausing.)

说明：  SPI STM32F051C8T6 coonfig SPI

说明：  stm32f103c8t6,驱动TM1650ESP8266串口蓝牙，内部flash读写，AT指令处理驱动(Stm32f103c8t6, driving tm1650 esp8266 serial port Bluetooth, internal flash reading and writing, at command processing driver)

51单片机使用printf输出调试信息，经测试完全可用，加入到自己工程，打开串口调试助手直接能显示内容，串口驱动部分借鉴宋老师手把手教学内容(51 Single Chip Microcomputer Prints Debugging Information with Princtf)