led visualizer

Tags: blog HTTP Io 2014 log different images onWhat's amazing is that the above pattern actually changes. I'm very curious. How can I tell you ??The conversion rate is used to calculate the variation frequency of the LED lamp.This is similar to the display principle of the old CRT.For example, when the fan speed is 60rpm, it is 60 laps per minute and 1 lap per second (of course, the actual speed is much faster, how can we get 600 rpm ).The fan has a s

/*Name: Stm32_gpio-lit LEDNote: For STM32, the operation of the LED is basically the corresponding IO port. ButUnlike 51, STM32 is equipped with a clock tree for each device, so it uses the correspondingdevice, you need to implement a configured clock tree (configured in the library function) and turn on the appropriate deviceThe clock (here is the corresponding Gpio port). Secondly, the IO port of STM32 is more complex than the 51 single chip, and ma

The tiny6410 Development Board supports both NAND and SD startup modes. In my understanding, it means "nc" is not connected. Om [] = 01111, boot_eint [] = 000, refer to the following table to indicate that the SD card is enabled. The switch is not described in the schematic. The LED diagram is as follows: Gpk4, 5, 6, and 7 light-emitting diodes are switched ON when the light-emitting diode is switched on. Arm Assembly

After the hello World Driver in the previous article, I am familiar with the general framework of the driver program. The driver of the second lesson is led! Pay attention to how it operates gpio and how it is associated with the user layer (Application Layer. Code attached: # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Include # Includ

Hardware resource LED2--GPO_06 control. Porting code gpio underlying API gpio-related underlying API is implemented in the arch/ARM/mach-lpc32xx/include/Mach/lpc32xx_gpio.h file. Usage example: 536/* Set led gpio as an output */537 _ raw_writel (outp_state_gpo (1), gpio_p2_dir_set (gpio_iobase )); 292/* enable the backlight */293 # If defined (outputs) 294 _ raw_writel (outp_state_gpo (4), gpio_p3_outp_clr (gpio_iobase); 295 # Elif defined (outputs) 2

Soon after I learned the driver, I saw about four chapters in ldd3. I first wrote a hello World driver, and later it was a memory-oriented character device driver, the latter made me clear the use of quantum and quantum sets, but there was no real device that could be seen with the naked eye. I checked some information and referred to other books, I plan to write an LED Linux driver by myself. If I have learned the character device driver, writing thi

1. Io Configuration Three registers are required for the configuration of the IOS port of the standard. IO port register P0 P1 P2 Address 0x80 0x90 0xa0 Pxsel P0sel P1sel P2sel Address 0xf3 0xf4 0xf5 Px [] function to set registers. The default is normal IO port (0: normal IO port 1: second function) Pxdir P0dir P1dir P2dir Address 0xfd 0xfe 0xff Px [] inpu

Nimi2440 bare metal LED program problems-general Linux technology-Linux technology and application information, the following is a detailed description. I am a beginner. This is the code I wrote. There is no syntax error, but it is a logic error and cannot implement the desired result. Please advise !! # Define GPBCON (* (volatile unsigned long *) 0x56000010) # Define GPBDAT (* (volatile unsigned long *) 0x56000014) # Define LED1_BCL (3 # Define LED

The first step, first talk about the single-chip microcomputer LED lit:Single chip microcomputer can operate single bit: Sbit led1 =P1 ^2; Control the light and extinguish by controlling variable led1; #include sbit led1 = P1 ^ 2; void delay(unsigned int xx)//延时 { int i = 0; while(xx--) { for(i = 0; i 400; i++); } } int main() { while(1) { led1 = 1//

Factory settings are: 202.11.11.01The initial port number is: 2929Set the IP of the virtual machine with the IP of the LED on a network segment, Telnet command on the virtual machine, log on to the LED.In the/etc/init.d/rcs file,#!/bin/shMount-t Proc/proc/procMount-t Sysfs/sys/sysMount-t devpts devpts/dev/ptsifconfig eth0 hw ether 00:15:07:21:00:72Ifconfig eth0 10.0.10.211 netmask 255.255.255.0Route add default GW 202.11.11.38Telnetd-l/bin/shCD Signal

as an Internet of things professional students, feel not to learn these things connected to the knowledge of the Internet can not afford their own, well, learning to start!!! The CC2530 has 21 digital input/output pins, namely p01-p07, P10-P17, P20-P24. In particular, it is important to note that the input and output of the CC2530 pin is different from the 51 single chip microcomputer, look at the comparison of the picture.Well, this has a basic understanding of our own ZigBee module to understa

　　The GPIO pin has two modes board and BCM.1.GPIO output Control LED：　　Code:　　　　(1) Using board mode, GPIO.setmode(GPIO.BOARD) . Pin 35th is GPIO19 under BCM.(2) Set pin 35 to output mode,GPIO.setup(35,GPIO.OUT)(3) on the GPIO35 pin output high level, can also be Gpio.high2.GPIO interface for input signal：　　Circuit diagram　　When the switch is off, the GPIO23 is the high point level to obtain the input signal is ture. When the switch is pressed, the GP

Example of device driver for LEDThe order in which the characters are driven is: the first is to build the kernel module frame, then the character driver, and finally write the open and IOCTL functions to implement the LED light control driver.The first is the LED.C code:Implementation of Makefile:Files generated after make:Next is our application: led_app.c:Compile the Build Led_app program:Put two files: A driver file, a executable program copy to t

Today wrote a simple key key to drive the LED and Beep buzzer program, the source code is as follows:/* Copyright (C) fulinux Other files are similar to those in the previous days.u-boot-2014.10 5th day----LED, button, and beep bare metal programs

Program function: Key control LED status, interrupt implementation.Phenomenon Description: When the K key is pressed, the LED0 always flashes, which affects other LEDs.Note: Connect the P3.2 pin (INT0) to the switch K pin with the DuPont line.Program:ORG0000H ljmp MAIN ORG0003H; external interrupt 0 entranceLJMP INT0 ORG0200HMAIN:Setb EA; Turn on the total interruptSetb EX0; Open external interrupt 0, i.e. P3.2 pin CLRIT0; set to low level trigger

I. Theoretical analysis1. In real life, in addition to a device can read and write, we also want to be able to control the equipment, such as LED light off, motor rotation and so on.2. It is generally desirable to pass commands from the application to the kernel so that the control functions can be called to achieve different controls.3. In user space, use the IOCTL system call to control the device: (Application interface)int ioctl (int fd,unsigned l

Copy CodeThe code is as follows: A$arr =array (' a ' = ' = ' abc ', ' B ' =>123, ' C ' =>true);B$arr =range (' A ', ' d ');1for ($i =0; $i echo $arr [$i]. ', ';Echo '';2foreach ($arr as $key)echo "$key,";Echo '';3foreach ($arr as $key = $val)echo "$key-$val,";Echo '';4Reset ($arr);while ($item =each ($arr)) {echo $item [' key ']. ' -'. $item [' value ']. ', ';}Echo '';5Reset ($arr);while (list ($key, $val) =each ($arr)) {echo "$key-$val,";}Echo '';?> Use statement a $arr =array (' a ' =