mp3 schematic design design design design thinking clear steps

基于51系列单片机的计算器程序.开发环境:KEIL,开发语言:c51,仿真环境Proteus-51 Series single-chip microcomputer-based calculator program. Development environment: KEIL, the development of language: c51, simulation environment Proteus

单片机proteus仿真，可以做成实例的仿真文件-proteus proteus

增加ASCII.C的一个ASCI码(7F),用于虚拟按键用 修改UART串口的命令解析程序，修改RTC的pcf8563中断部分。 精简IIC和smart_timer代码,添加define.h的宏定义。 修改system.c里的消息堆栈的宏定义 增加ii.c函数,支持对eeprom的打包 增加由PLD或者GPIO输出的模拟UART，在6个CLOCK下速度为57.6K 增加消息的优先级功能，消息类型的前4位为消息的优先级，后4位为消息的类型 试用于初学单片机并且想更上一层楼的，或者有些基础，想减少工作量的。-an increase ASCII.C the ASCI code (7F) for the virtual keys with serial UART to amend the order analytic procedures, the revised RTC pcf8563 interruption part. IIC and smart_timer streamline code, add the definition of Acer define.h. The revised system.c news stack macros increase II.c function, support for EEPROM packaged increase from the PLD or GPIO output analog UART, in the next six CLOCK speed of 57.6K news of the priority function of the type of information before news of the four priority levels after four types of information on the trial beginner to a higher level and SCM, or some foundation, we want to reduce the workload.

基于KeilC 平台的单片机源码，适用于AT89ls52，程序通过中断方式查询按键的输入，I/O口接入单独按键。-Microcontroller-based platform KeilC source for AT89ls52, procedure interrupt input query keys, I/O port access to a separate button.

use for connection to enternet

用于蓝牙开发！基于hci的编程，可实现单片机对蓝牙模块的控制，从而实现蓝牙主从设备的连接和通信！-for Bluetooth development! Based on HCI programming can be realized right MCU Bluetooth module control, thereby achieving Bluetooth equipment from the main connection and communication!

基于DS12R885的时钟芯片的单片机程序 很具有参考价值-DS12R885-based single-chip clock chip is a reference value of the procedure

汽车电子转速表电路，包括原理图和印制板图，使汽车电子的典型电路，值得学习-automotive electronic tachometer circuit, including schematic and PCB plans, the typical automobile electronic circuits, it is worth learning

流水灯：灯从最低位P0.0开始向高位依次点亮-Water lights: lights from the lowest to the highest followed by P0.0 lit

利用KEIL C51语言编写的T6963C液晶驱动程序,头文件有具体的连接定义和汉字字库,只要硬件连接好,一定可以运行,不象有人纯粹为了下载别人的代码-use KEIL C51 prepared by the T6963C LCD driver, the first document linking specific definition and Chinese character, as long as the hardware connection, and will be able to run, unlike some others simply to download the code