这是一个用AT89C51制作的2.4G频率计的源程序

三条腿的管子标识与实际名称对照，部分。在看别人的板子时很有用-mask

这是一篇关于RS－485接口应用的文章- This is about the RS- 485 connections applications article

51写的SLE4442程序实验用的SLE4442卡初始密码PSC1、PSC2、PSC3均为0FFH-51 written SLE4442 experimental procedures used in the initial password SLE4442 card PSC1, PSC2, PSC3 are 0FFH

CAN，蜂鸣器，LED灯，EEPROM，IO_KEY，RS232，RS485，RTC，USB，TCP IP

IEEE 1149标准 JTAG,好东东，藏了多年了，-JTAG IEEE 1149 standard, good Dongdong, possession of years, huh

NXP LPC3000 ARM9 Linux BSP，除了触摸屏外，其它的部分基本包含！-NXP LPC3000 ARM9 Linux BSP, apart from a touch screen, the other part of the basic included!

应用背景Logical separation of program and data memory All 8051 devices have specific memory organization, they have separate address spaces for Program (ROM) and Data (RAM) Memory. This logical separation of Memory is useful because it allows the Data Memory to be accessed by 8-bit addresses, which can obviously be more quickly stored and manipulated by an 8-bit CPU. Of course, the l6-bit Data Memory addresses can still be generated with the DPTR register. Program Memory Program Memory can only be read, not written to. The address space for 8051 core is 16- bit, so there is maximum of 64K bytes of Program Memory. Up to 4 Kbytes of Program Memory can be on chip, internal Program Memory of the 8051 core. For access to external Program Memory is used signal PSEN (Program Store Enable). Data Memory Data Memory is on a separate address space than Program Memory. For external Data Memo

热电偶多路温度检测仪 -multiple thermocouple temperature detector

单片机的C语言程序，实现USB转串口的功能。-Single-chip C-language procedures, implementation of the function of USB to serial port.

STM32标准外设库之前的版本也称固件函数库或简称固件库，是一个固件函数包，它由程序、数据结构和宏组成，包括了微控制器所有外设的性能特征。该函数库还包括每一个外设的驱动描述和应用实例，为开发者访问底层硬件提供了一个中间API，通过使用固件函数库，无需深入掌握底层硬件细节，开发者就可以轻松应用每一个外设。因此，使用固态函数库可以大大减少用户的程序编写时间，进而降低开发成本。每个外设驱动都由一组函数组成，这组函数覆盖了该外设所有功能。每个器件的开发都由一个通用API (application programming interface 应用编程界面)驱动，API对该驱动程序的结构，函数和参数名称都进行了标准化。 ST公司2007年10月发布了V1.0版本的固件库，MDK ARM3.22之前的版本均支持该库。2008年6月发布了V2.0版的固件库，从2008年9月推出的MDK ARM3.23版本至今均使用V2.0版本的固件库。V3.0以后的版本相对之前的版本改动较大。本程序为最新版的库函数固件库。