nrf51822 pwm

This article introduces a program of 51 series single-chip microcomputer that uses pulse width modulation (PWM) to control the brightness of LED lights. We all know that 51 Single-Chip Microcomputer itself has no pwm interface. This program is The software simulates pwm and adjusts the duty cycle of high voltage and low level in a certain frequency square wave to

Discussion on the understanding of PWM1. What is PWM?PWM (pulse width modulation) is a simple frequency conversion technology, is to change the pulse width to control the output voltage, by changing the period to control its output frequency. If it's not clear enough, well, let's take a look at the examples in our real life, why do we have to twist the fan, the speed of the fan will change; adjust the sound

PWM is a technology to regulate the output power (commonly known as voltage regulation), the principle is to change the duty ratio of the output square wave, the specific output see: The output signal is the voltage value, when the load is constant resistance, the output power is 25%, 50%, 75%, respectively. The implementation method is as follows: Set up a counter in which the first line is a 4-bit counter that automatically changes to 0 p

---restore content starts---16-bit Timer timer_a output Precision PWM1. Mode operationTimer_a support: Multi-channel capture/Compare, PWM output, timingSimultaneous support: Interrupts Timer_a Features: Asynchronous 16-bit timer/counter with four modes selectable, configurable clock resources Up to 7 configurable capture/comparison registers Features with PWM configuration asynchronous input and o

Smart Car PWM control DC Motor In the automotive industry, we must not only control the operation of automobiles through the CAN bus, but also need a DC motor to control the speed of the automobile in the intelligent remote control automobile market: we can use PWM wave at ordinary times, hardware changes voltage and other methods to change the voltage value at both ends of the vehicle motor, and then adju

OID Tim3_init (void){Tim_timebaseinittypedef tim_timebasestructure;Tim_ocinittypedef tim_ocinitstructure;/* PWM signal level hopping value */U16 ccr1= 36000;U16 Ccr2= 36000;/*pclk1 after twice octave as TIM3 clock source equals 72mhz*/Rcc_apb1periphclockcmd (RCC_APB1PERIPH_TIM3, ENABLE);/* Time Base configuration */Tim_timebasestructure.tim_period = 1599; Counting Cycle 1600Tim_timebasestructure.tim_prescaler = 1; Set Prescaler: Prescaler = 2, which i

#include //program is written based on KEIL-C51, introducing 8051 header files Sbit p10=p1^0; Sbit p11=p1^1;unsigned intScale//Duty ratio control variablevoidMainvoid) {unsigned intN//delay cycle variableTmod=0x02;//Timer 0, operating mode 2 (0000 0010), 8-bit timingth0=0x06;//Timing 250US (12M oscillator)tl0=0x06;//Preset valuetr0=1;//Start timer 0et0=1;//Start Timer 0 InterruptEa=1;//Open Total Interrupt while(1) { for(n=0;n50000; n++);//delay for some timescale++;//Duty ratio cont

1, first set up software simulation, you can see the STM32 not complete manual of the 2.4 software simulation chapter(Original file name: 1.jpg)Example functionality:-Clock Settings:-XTAL = 8.00 MHz-SYSCLK = 72.00 MHz-HCLK = SYSCLK = 72.00 MHz-PCLK1 = HCLK/2 = 36.00 MHz-PCLK2 = HCLK = 72.00 MHz-ADCLK = PCLK2/6 = 12.00 MHz-SYSTICK = HCLK/8 = 9.00 MHz-TIM4 is running at 100Hz.LEDs PB8, PB9 is dimmed using the PWM function of TIM4 channel3, Channel4The T

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

51 single-chip microcomputer is capable of output PWM, the trouble of comparison. In this case, an internal timer is needed to implement it, which can be implemented with two timers or with a timer. The method of using two timers is to control the frequency with the timer T0, and the timer T1 to control the duty ratio. The general programming idea is this: T0 timer interrupt let a I0 port output high level, in this timer T0 interrupt in the start Time

This article is based on a week CC2541 notes summarySuitable for overview and quick index of knowledge--All Links:Intermediate Tutorial-osal Operating system \osal operating system-a preliminary study of experimental osal"Insert" sourceinsight-Engineering Establishment methodIntermediate Tutorial-osal Operating System (Osal System solution basic routines)Intermediate Tutorial-osal Operating system (learn more about-oled normal keys and 5-directional buttons-interrupts!!!) This system drive laye

　　　　　　　　　　　　　　　　　　　　　Using STM32 to generate a PWM wave that can be adjusted by the duty ratioPopular Science: PWM (pulse width modulation) pulse width modulationAbout the generation of PWM waves:1. First look at the code:Configuration of PWM wave mode (using Timer TIM3)static void Tim3_mode_config (void){Tim_timebasei

Today a customer doing CC2541 a problem, set up a PWM register, found that the normal frequency output can not be set PWM.1. I suggested that he turn off the power_saving, the result can be normal output PWM, because when the POWER_SAVING,MCU will go into hibernation, this is the 32MHz crystal off, and the Timer default to use 32MHz crystal oscillator, so

Source: DC Motor Drive PWM frequency1, there is no unified standard, in fact, the frequency of PWM and your motor inductance and you need the speed response time has a great relationship. The general motor with 14K is enough. Of course, since the need for a simple speed adjustment can be casually selected. If the motor speed is relatively high, inductance is relatively small, you can use a relatively high f

PWM of Ti-rtosThe CC1310 has 4 timers,8 PWM channels, and the ti-rtos Its driver is written well, the reference needs to include the PWM.h header file. is typically preceded by the task principal, or the main function is initialized.BOARD_INITPWM ();//...Pwmhandle = Pwm_open ();Pwm_open (Pwmhandle);-------------------the above code only needs to be called once -----------------------------------Pwm_setdu

[Serialization] FPGA OpenGL series instances DC motor PWM Control Based on OpenGL I. Prerequisites In the previous article, I summarized the control of the stepper motor. This time I will learn about the control of the DC motor. First, we will briefly understand the difference between the stepper motor and the DC motor. (1) step-by-step movement of stepper motors, DC motors usually adopt continuous movement control. (2) The stepping motor adopts direc

reproduced in the original: http://bbs.eeworld.com.cn/thread-446834-1-1.html thank you very much. Pulse width modulation (PWM) is a method for digitally encoding analog signal levels. With the use of high-resolution counters, the duty ratio of the square wave is modulated to encode the level of a specific analog signal. The PWM signal is still digital, because at any given moment the full-amplitude DC pow

Circuit Simulation and Analysis When designing the PWM wave RC filter circuit, the time constant should be determined according to the response time requirement, and the RC time constant should be far greater than the PWM period. The RC charge/discharge time constant should be equal as much as possible. In addition, the RC parameters should be determined according to the voltage precision requirements.

About ARDUINOPWM pin Frequency control output Board: Arduino M0 Pro Zero Use Tone (pin_led_13, 1000); /* Change Current PIN frequency */ Use Analogwrite (pin_led_13, 200);/* Output PWM waveform */ The principle is that the tone function changes the Prescaler value of the clock domain, causing the PWM output waveform frequency to change Minor adjustments can change the count upper value in the Analogwrite

STM32 advanced timer TIM1 generates two-way complementary PWM wave (with dead zone), stm32tim1 Test environment: Keil 5.2.160.0 STM32F103RBT6 Firmware Library version: STM32F10x_StdPeriph_Lib_V3.5.0 (2011) In this paper, TIM1 Channel 1 and Channel 2 are used to generate two complementary PWM waves with 1 khz and 1 us dead zone. IO port used: We use pin PA9, PA10, complementary Output Using PB14, PB15 Some