The application of the timer, query method. Let 8 LED lights, left and right each of the 4 to light back and forthCode: /********************** Query method is the main program continuous query is interrupted, and do not need to prepare the sub-program ***********************/#include#defineLED P1#defineCOUNT 50000//50000 * 1us = 0.05s 50000 counts several times#defineTH_M1 (65536-count)%256//MODE 1 is assigned to a high of 4 bits#deefine tl_m2 (65536
Register (GPIOX_ODR) (x=a. EEG:GPIOA->ODR |= 1 2.GPIO Configuration Related RegistersPort bit set/clear register (GPIOX_BSRR) (x=a): EThe ODR register only operates on 1 and does not support write 0 operations. Use the BSRR register to clear the device.Port bit Clear Register (GPIOX_BRR) (x=a). EPort bit Clear Register (GPIOX_BRR) (x=a). E) refer to the data sheet for detailsThis register is used to lock the configuration of the port bit when the correct write sequence is set to bit (Lckk). bit
In the previous article, we introduced the framework of the character device driver. In this article, we will operate on the real hardware-led.
Author: canghai hunter Source: http://blog.csdn.net/embedded_hunter reproduced please indicate the source of embedded technology exchange QQ group: 179012822
I. experiment environment
Development machine environment
Operating System: Ubuntu 9.10
Cross-compiling environment: Arm-Linux-GCC 4.2.2, installation l
Pwr
PWR full name power, is led power supply light, when the LED in the router to power up the time has been bright, the normal situation does not flicker.
Sys
SYS, which is the system running status indicator. And it is through this lamp to inform the user of the operation of the device, if the fault or restart in the words, will flicker and not the same as usual.
Wlan
The full name of WLAN is wireles
Many netizens will install the LED display at the door of the store to facilitate the promotion and contact of their own store, thus attracting customers ' attention. So, the LED display how to change the word? In today's tutorial, we use the LEDSHOWTW LED display control software to explain the specific method!
LED e
The main implementation of this tutorial: control the LED through the Voice module on the light and out. Said "Turn on the Light", LED light, said "turn off the Light", led off.LD3320 Speech Recognition Module Overview:The use of SPI communication interface, onboard microphone and active crystal oscillator to facilitate the realization of the electronic products
During this period of time, LED Image System Development has been intense, and the current results are still very "remarkable", and finally have a chance to breathe the air :)
The system includes three technical points: first, the metadata configuration (which is no different from the common configuration software, because the user's technical level is relatively low, therefore, you can modify the attribute list of the original embedded configuration
I used to think it would be useful to learn FPGA well. When I started to access FPGA, I tried to use verliog to write the peripheral IP address. Because of my skill, most of the output was unstable and I did not dare to use it. Later, I wondered why I didn't need to run the soft core using the niosii. It was very convenient and safe to implement peripheral communication. So I took the Development Board to learn how to operate the water lamp.
It took one day and one night for the
Label: style http sp on ef bs new as application With technological innovation,LEDThe display screen is moving towards a more full-color, high-definition display, basic technology standardization, diversified application needs, and personalized product design trend,Chizhou Electronic Display Editor: First, full-color, high-definition display, intelligent and networked control. The indoor display screen is mainly oriented to full color, small dot spacing and high density, and is expected to con
We need to configure three registers: p1sel, p1dir, and p16b. The functions of the I/O port are shown in the following table: (For details, refer to the datasheettings)
Link https://pan.baidu.com/s/1nLjYI8LgqxPH6WHd_n1Szw for the cpu30 datasheettings
* P1sel (0: Common IO port 1: second function)* P1dir (0: Input 1: Output)* P1indium (0: Pull up/pull down 1: three States)
1 # include
1 # include
This piece of code is the result of a streaming lamp. I just had three lights on this baseboard, A
kernel driver, here is a better blog post has a comparative system of introduction. Http://www.cnblogs.com/mvperic/archive/2010/07/25/1784790.html
The problem comes, according to other people taught in the WinDbg to set the symbol path and source code path, even if it is connected, you can always seem to be half off. I don't know what's going on here.
So consulted a colleague, or did not find the reason, and then use another same system, found to be able to hang up, so the configuration
point.Hanteng X7 and other SUV based on this feature to build the model, will be the whole aspect of the Eastern factor into which, in the convenience of users to travel, but also indirectly promote the return of Oriental aesthetic philosophy, this idea and move, it is in line with the current market development of the main melody move.In general, any one of the models may become the market, but in the current era, the function of the SUV and cost-effective characteristics, is undoubtedly the m
If the format of the code is UTF8, then compiling with VS2012 will result in the following error:\classes\gameview.cpp: Error C2001: line break in constant\classes\gameview.cpp: Error C2143: syntax error: Missing ")" (in front of "}")The solution is to transcode, convert UTF8 to GB2312 code,There are two ways to do this:1. Download the transcoding tool online.2. Using the VS2012 transcoding function:Step 1: Tap the file you want to transcodeStep 2: Select Menu: File-Advanced Save options:Step 3:
Setprocessdpiawarehttps://msdn.microsoft.com/en-us/library/windows/desktop/ms633543 (v=vs.85). aspxIn Win7 's resolution setting, change the text setting to 150% and then the game DPI-led issues
the handler reference, and handler is an anonymous inner class object that holds activity. If MSG is a delay operation then when actvity finish, the Act reference is held, causing The objects in the activity are not freed to cause a memory leak.The correct code:Both the 1.handler and Runable methods declare static, which is the inner class that is used in handler (the anonymous class cannot be used) and is declared as a static typeUse weak references in 2.handler to hold activity or context obj
problem, or incompatible with the cause, I will change back to WIN7 itIssue 3: Reload WIN7 X64 found, also is the shutdown crash bugThis time really feel tangled, is not the two systems are broken, it is impossible to do so, this is the beginning to think about which side is not the same, to think about it is the system needs and hardware incompatibility problemQuestion Answer:When you use the MSDN original Win8.1 X64 installation, the hard drive must be converted to GPT,MBR is not allowed to i
The new listing of the WIN10, we are eager to install, but encountered a lot of problems.There are several solutions to the WIN10 shutdown indicator light.LightIf only the power supply light is on, unplug the power.If the lights and other lights are lit for the following two types ( I know, there may be other reasons, welcome to add the instructions ) (1) Power setup issues (2) Driver issuesfor (1) The solution is as followsWindows key,First, you open the Control Panel by using the shortcut keys
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