PCB 设计指导

本实验利用8253做定时器，用定时器输出的脉冲控制8259产生中断 在8259中断处理程序中，对时、分、秒进行计数，在等待中断的循 环中用LED显示时间。 8253用定时器/计数器1，8253片选接CS4，地址为0C000H。8253时钟 源CLK1接分频电路的F/64输出。分频器的Fin接4MHz时钟。8253的 GATE1接VCC。 8259中断INT0接8253的OUT1，片选接CS5，地址为0D000H。 显示电路的KEY/LED CS 接CS0，地址为08000H。-In this study, the use of 8253 to do the timer, using timer pulse output control 8259 generates an interrupt in 8259 interrupt handler, for hours, minutes and seconds count, waiting for interruption through ring using LED display time. 8253 with the timer/counter 1,8253 chip select access CS4, address 0C000H. 8253 clock source CLK1 of the F/64 then divider circuit output. Fin then 4MHz clock divider. 8253" s GATE1 then VCC. 8259 interrupt INT0 then 8253" s OUT1, chip select access CS5, address 0D000H. Display circuit of the KEY/LED CS access CS0, address 08000H.

此程序实现了类似protel电路画图程序。-This process to achieve a similar Protel circuit Paint program.

LED显示驱动芯片的驱动程序，用SPI总线-LED display driver chip of the driver, with SPI Bus

ucos II操作系统的源代码。程序完整，功能详细，适合嵌入式操作系统的入门学习材料-the source code of the ucos II .this material is for the beginer of the embed operating system.

PALM 上的城管管理系统,具有拍照录音等功能-PALM administration on the management system, with cameras recording function

基于dragon_MX1_ads的装载启动代码armboot-dragon_MX1_ads based on the loading boot code armboot

缝纫机主机板测试程序； 使用嵌入式系统。-Sewing machine motherboard testing procedures the use of embedded systems.

s_serial(c51用io口模拟串口)-s_serial (c51 mouth simulation with io Serial)

x25045的读写源程序，可以读x5045和写x5045，软件模拟spi总线协议。-x25045 source reader, can read and write x5045 x5045, software simulation of 20 bus protocol.

资源描述 基于STM32F103的RLRTX的模板，本人亲自写的模板，可以使用，添加相应的任务即可。 RL-RTX是MDK自带的，免费的实时操作系统，原理跟UCOS是一样的，很受欢迎。