mr12 led

Last week, the company's trade fair activities need a display on the LED screen, the top of the platform to show the total amount of trading, the left and right sides are manufacturers and buyers of real-time transactions, the specific page length below this lookDemand review when the product said the total amount of the top to have a number of scrolling or the effect of the brand, I think I have a good package of motion frame, add a effect should not

The so-called I/O memory is a mapping of the host's memory through various interfaces connected to the host's hardware. The LED driver also provides two ways of interacting: command and read-write device files.Steps to create a device file:1th Step: Initialize the Cdev with the Cdev_init function2nd step: Specify the device numberThe device number of the Linux device file is the primary device number and the secondary device number, where the first 12

Yesterday made the control led, played the first, the rest of the feeling is very simple, here recordJust a couple of photos.Play the honey module only to find the law, generally this module, there will be three pins, VCC (3.3V or 5V power supply output PIN), GNC (for Gpio pin of GNC), out/(I/O) (corresponding to the gpio number of pins), if it is necessary to send information to the Raspberry Pi, This module identifies the out, such as the sound sens

2015.4.8Sunny WednesdayWhat the teacher said today is the kernel to write led and PWM driver, to achieve the function of pattern lights and singing. Understand the application and the driver of the docking, and finally realized in the song at the time according toThe rhythm of the song Lights out a small lamp, should be two independent drivers have been written, want to combine is actually very simple, as long as in the master function inside open two

A simple arm program that allows LED lights to shine. what's the problem? -- Linux general technology-Linux programming and kernel information. The following is a detailed description. A simple arm program with LED lights shining . Text . Global _ start _ Start: LDR R0, = 0x56000010 @; GPBCON Set Mov r1, #0x00015400 @; set all output Str r1, [r0] Ldr r0, = 0x56000014 @; GPBDAT On: Mov r1, #0x00

This led applet is based on the minimum system board of the de-Lai. I was writing this program to be able to easily understand and facilitate portability. The trouble with a pin change for STM32 is that it's hard to get a job, so this time I'm writing this library, I also pay special attention to these aspects of a small LED is very simple sometimes used to do the adjustment trial, I think it is quite good

Experimental Purpose:PC software through the serial port control FPGA Development Board on the 4 LED lights off, while the digital tube shows the number of LED lights, experimental results such as.Experimental background:Always want to learn FPGA, this is an introduction, I am reading to learn, so the code of the FPGA is reference to the revision of the book, in fact, very happy, because this experiment is

Software developmentReferring to experiment two (LED), this experiment and experiment two (LED) difference is that the system clock from 50M to become 100M. Run the result, output hello from Nios ii! in the Debug window, and the four LED lights on the board flow display, indicating the test was successful! This experiment confirmed that the board support Operatio

★ Overall IntroductionLED driver mainly realizes the hardware drive of 4 LED lights on the TQ2440 Development Board, realizes the Pin GPIOB5, GPIOB6, GPIOB7, The high and low level setting of the GPIOB8 (the configuration of the PIN is already implemented in the COMMON-SMDK.C), the driver is called by the test program, and the LED light is illuminated by command.★ Specific Introduction 1, Driver code: MY_LE

Widely used in electronic equipment led digital display data, in many applications also often analog LED digital tube display data, so that the program screen looks very distinctive. Using the Delphi program to realize the simulation of LED digital tube is very easy, the specific steps are as follows: 1. Start Delphi 4.0. In the Tools Tool menu, select the Delph

led character device driver @2440 Step: 1. Device drivers usually require a portal function (popular understanding is to load this driver module will execute the function, usually do some initialization operation), with Module_init (firstdrv_init) decorated.2. The same needs an export function (called when the module is unloaded, usually doing the unload work contrary to initialization). Decorated with Module_exit (firstdrv_exit).3. Define initializa

the dialog box. The pattern-drawing area each grid corresponds to a pixel point in the defined pattern. In this application, refer to the image below to make a 4 * 4 Pixels pattern in Black-and-white color, then click the Fill button to fill the Mask layer with a pattern. Complete this fabrication before discovering the Ditherbox filter, I think my approach would be: Create a 4 * 4 Pixels size document, press Ctrl + "+" to show the figure to 1600, with the Pencil tool, the minimum size

(1) The preface has just begun to learn STM32, of course, is lit LED lights, from arm "Hello word" began. Software installation, hardware connection, the previous article has been said, there is no more to say. (2) Experimental purpose: Use STM32F10C8T6 to complete the function of running lights. (3) The introduction of the experiment encountered the problem: The program is finished, the lamp is not bright, commissioning for two hours, finally found t