led visualizer

There are four small LED lights on the tianembedded 2440 Development Board. The random band test software is developed using C ++. However, I prefer the C # language, so through the analysis of the BSP package of tq2440, the four small LED lights are controlled through gpio ports. Therefore, as long as the C # is used to control the gpio port, it can make the LED

I. Code explanation1. Write Hal-Layer CodeGenerally, Hal Moudle involves three key structures:Struct hw_module_t;Struct hw_module_methods_t;Struct hw_device_t;The following code demonstrates the usage of these three structures.File:/hardware/modules/include/Weiyan/led. h File: LED. c 2. JNI layer file:/frameworks/base/service/com_mokoid_server_ledservice.cpp 3. framework layer service, file:/frame

LED = Light emitting diode, light-emitting diode, a solid-state semiconductor device that converts electrical energy into visible light, which converts electricity directly into optical LED applications can be divided into two categories: one is LED display, and the other is led single tube applications, including bac

One: Led Core driver(1) When writing the LED core driver, we first want to do the kernel clipping, because the friendly arm will be the driver of the LED light loaded into the kernel, so before writing the module driver must first cut off the original LED lights;led driver i

The kernel of cubieboard1 already supports W1 temperature sensor DS18B20 (dependent kernel options and modules include Dallas's 1-wire support, gpio_sunxi, ww.sunxi, ww.gpio, ww.slave_therm ). DIY is an experiment that displays the current time and temperature at the same time on the 8-bit 8-segment LED display module. Jarry's post long ago (http://forum.cubietech.com/forum.php? MoD = viewthread tid = 474) describes the use of DS18B20 on cubieboar

Http://hi.baidu.com/52_diy/blog/item/d8310dfac0a97716a8d3114b.html POV is persistancd of vision. It uses a single-chip microcomputer to control the flow lamp, and uses the movement of the flow lamp and the temporary effect of human vision to generate various graphics or texts. The effect is as follows: This figure shows how it works. The principle is relatively simple, it is easy to implement with a single-chip microcomputer, and the detailed process of rotating the

1, create the LED drive device files:(1) Initialize the Cdev with the cdev-init function(2) Specify the device numberThere are two ways to assign a device number: Specify it directly in your code (hard-coded)Dynamic allocation(3) using the cdev-add function to add a character device to a character device array in the kernel(4) Create a struct class using the class-creat Macro(5) Create a device file using the device-create function2,

With the bit-band Operation , the bit-band operation is to inflate each bit into a 32-bit word that accesses these bits when the word is accessed. http://www.cnblogs.com/xiaobo-Linux/The port is then enabled to://³õê¼»¯pb5ºípe5îªêä³ö¿ú.²¢ê¹äüõâὸö¿úµäê±öó//LED Io³õê¼»¯voidLed_init (void) {gpio_inittypedef gpio_initstructure; Rcc_apb2periphclockcmd (Rcc_apb2periph_gpiob| Rcc_apb2periph_gpioe, ENABLE);//ʹäüpb,pe¶ë¿úê±öóGpio_initstructure.gpio_pin= Gp

/* Project to create MCU selection, Atmel 89C55 microcontroller: stc15f104w function: 500M seconds Flash LED connection description: Led positive string 1K resistor connected to VCC, negative to MCU 8 feet p3.3*/#include 650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/78/0A/wKiom1Z0IyCTSEKqAADWnwn9KuA736.png "title=" stc15f get started. png "alt=" Wkiom1z0iyctsekqaadwnwn9kua736.png "/>This articl

1. design requirements EM-STM3210E Development Board has a LED lamp D1, write a program to light up the light. 2. hardware circuit connection On the Development Board, D1 is connected to the PF6 pin on the STM32F103ZE chip, as shown in. 3. Software Programming According to the task requirements, the program content mainly includes: 1. configure Reset and clock control (RCC) to enable the clock of the GPIOF port Module 2. Configure the PF6 pin of the

★ General 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 with the test program, and the LED light is illuminated by command.★ Detailed INTRODUCTION 1, Driver code: MY_

This article describes the jquery implementation of the LED Billboard rotation system picture switching effect, share for everyone to reference. Specifically as follows:JS Analog roadside giant screen advertising switch effect, have to believe that JS did, and let you have nothing to say the lifelike effect.LED advertising display on the image switch effect, the scene is similar, the effect is quite shocking to see me dumbfounded, love special effects

BBB Board lesson Four: Simple LED control experiment Learn BBB board the ultimate goal is to imagine the microcontroller as the control, but the control of the idea is completely different (Linux control hardware device is the virtual file of the relevant equipment, read and write), the study of a few days the head is big or no progress, many blog posts on the web, there is no unified statement, It is estimated that the years of the BBB board are diff

All over the country has been fully into the summer, and summer thunderstorm weather often give outdoor LED display steel frame structure to bring lightning hazards, see the following several lightning protection measures.　　(1) For the protection of Direct thunder, in the led electronic display (outdoor) support structure to install lightning rod, indoor full-color LED