用单片机蜂鸣器实现911报警声音，采用中断延迟实现输出频率的变换。...

大学毕业设计作品：出租车计价器的设计：以AT89S52单片机为中心，通过金属传感器来测距，实现对出租车的计价统计。结合语音芯片ISD4004，时钟芯片DS1302，功放模块LM386N组成语音时间控制系统，最后通过液晶显示模块LCD12864显示单价、路程、总价、时间等。本系统可以实现单价、起步价、白天价、夜间价的显示和时间的修改。AT89S52通过P0口与外部语音报价电路相连，可以实现语音报价功能。-Graduated from college design work: the design of a taxi meter: The AT89S52 microcontroller as the center, ranging through the metal sensor to achieve statistical valuation of the taxi. Combination of voice chip ISD4004, clock chip DS1302, composed of voice amplifier module LM386N-time control system, the final adoption of liquid crystal display module LCD12864 show unit price, distance, total price and time. This system can achieve unit price, starting at daytime price, prices shown at night and the time changes. AT89S52 through the P0 port with an external circuit connected to voice offer, you can offer voice functionality.

P89C52对SJA1000的经典设计 使用了ZLG的隔离收发一体芯片 不可错过！-P89C52 of SJA1000 classic design uses isolation ZLG transceiver chip not to be missed!

Point RTOS 主要是一个针对小系统开发而设计的实时操作系统。 目前，Point RTOS 仅提供对51系列及其扩展系统单片机的支持， 针对51内核函数不能重入以及51单片机的内存空间管理方式等因素， RTOS放弃了抢先式内核的调度，而使用了时间片的调度方式，除非任务主动放弃， 否则任务将独占CPU一直运行，因而任务中必须完成对本次操作的时间片设置，即等时间的设置。-Main Point RTOS is a small system development and design of real-time operating system. At present, Point RTOS only provide for 51 series and its expansion of the system single-chip support for 51 core function should not re-entrant, as well as 51 single-chip memory space management and other factors, RTOS abandoned preemptive kernel scheduling, the use of a scheduling time slice manner, unless voluntarily chose to abandon the mission, or mission will be exclusive CPU has been running, which must be completed in the mission of this operation time slice settings, that is, the time settings.

c51单片机的中文拼音输入法c程序源代码-decoder SCM Chinese Pinyin input method c source code

美国TI公司的protel 元器件库，在应用中需要更新，本人收集了最新的版本共30M，为提高上传速度分六次上传。文件名依次为TI_1到TI_6。希望大家设计电路板时少走弯路这里是TI_3-TI" s U.S. Treasury protel components, need to be updated in the application, I collected a total of up-to-date version of 30M, to improve the upload speed upload six hours. File name followed by TI_1 to TI_6. Hope that the design of circuit board is less detours here TI_3

CMOS图像传感器OV7620在点钞机人民币号码识别记录系统中的应用-CMOS image sensor OV7620 yuan in cash registers record number recognition system

RC500 DEMO 上位板 的各种资料压缩包。-RC500 DEMO upper panels of various data compression package.

c8051f的IIC读取eeprom,有很好的程序结构，具有通用性，经修改后能用在任何单片机中的IIC操作中-c8051f eeprom read the IIC, a very good program structure is universal, , as amended, can be used in any single-chip-IIC operation

可在51单片机上运行的小型OS,不过最多任务数为16个-51 SCM in running a small OS, but the largest number of mission 16

51单片机驱动93c46，C源代码，SPI总线-51 Microprocessor 93c46, C source code, SPI Bus