made by: kangkai data:2008.11.23 this one is used to test arm7 str71x. use a led to test GPIO. a---------P0.0 b---------P0.1 c---------P0.2 d---------P0.3 e---------P0.4 f---------P0.5 g---------P0.6 just run it and you will see the led to show 0-9 all the time.
上传时间: 2016-12-16
上传用户:moerwang
This example shows how to update at regulate period the WWDG counter using theEarly Wakeup interrupt (EWI). The WWDG timeout is set to 262ms, refresh window set to 41h and the EWI isenabled. When the WWDG counter reaches 40h the EWI is generated and in the WWDGISR the counter is refreshed to prevent a WWDG reset and led connected to PC.07is toggled.The EXTI line9 is connected to PB.09 pin and configured to generate an interrupton falling edge.In the NVIC, EXTI line9 to 5 interrupt vector is enabled with priority equal to 0and the WWDG interrupt vector is enabled with priority equal to 1 (EXTI IT > WWDG IT). The EXTI Line9 will be used to simulate a software failure: once the EXTI line9event occurs (by pressing Key push-button on EVAL board) the correspondent interruptis served, in the ISR the led connected to PC.07 is turned off and the EXTI line9pending bit is not cleared. So the CPU will execute indefinitely EXTI line9 ISR andthe WWDG ISR will never be entered(WWDG counter not updated). As result, when theWWDG counter falls to 3Fh the WWDG reset occurs.If the EXTI line9 event don抰 occurs the WWDG counter is indefinitely refreshed inthe WWDG ISR which prevent from WWDG reset. If the WWDG reset is generated, after resuming from reset a led connected to PC.06is turned on. In this example the system is clocked by the HSE(8MHz).
上传时间: 2013-11-11
上传用户:gundamwzc
几个不错的汇编语言程序,其中有a/d,d\a,led显示等常用的汇编语言程序
标签: 汇编语言程序
上传时间: 2014-08-13
上传用户:磊子226
ST32 基于(英蓓特)STM32V100的EXTI程序 This example shows how to configure an external interrupt line. In this example, the EXTI line 9 is configured to generate an interrupt on each falling edge. In the interrupt routine a led connected to PC.06 is toggled. This led will be toggled due to the softawre interrupt generated on EXTI Line9 then at each falling edge.
标签: configure interrupt external example
上传时间: 2016-11-17
上传用户:GavinNeko
注塑机生产过程的微机控制系统设计本系统设计是通过8255A并行端口A、B传输数据控制12个LED发光二级管的亮灭来模拟控制两台注塑机的生产过程。其中端口A和B分别对应1号和2号注塑机,每一个LED代表一个工序。编程语言采用BORLAND C++语言。
上传时间: 2013-12-25
上传用户:叶山豪
89C52单片机的底层代码,包括A/D,D/A转换,键盘,LED显示等
上传时间: 2015-04-05
上传用户:偷心的海盗
在定时器中断中做LED的PWM输出 AT89C2051实现A/D转换的C51程序 单片机开发系统 指令系统 程序设计 定时与中断 系统扩展 接口技术 串行口
上传时间: 2015-04-21
上传用户:gonuiln
采用PIC16F877A单片机,A/D模拟量采集,LED显示,E2ROM存储,可断电保持显示数据,已硬件调示通过.供大家参考.
上传时间: 2014-02-18
上传用户:sevenbestfei
this a example of led 128x64
上传时间: 2015-09-20
上传用户:l254587896
竞赛抢答器:控制8255,C口作为输入,从A口输出与之对应的LED段码
上传时间: 2015-10-04
上传用户:zxc23456789