rpi pwm

Code One:1 /*******************************2 program function: Aclk=32768hz3 PWM wave t=512/32768 duty ratio 75%4 *********************************/5 6#include 7 voidMain ()8 {9Wdtctl = Wdtpw +Wdthold;TenTactl = Tassel_1 +taclr; One ACCTL0 =0x00; -CCTL1 =0x00; - theCCR0 = +-1;//t=512/32768 -CCTL1 =outmod_7; -CCR1 =384;//384/512=0.75 -CCTL2 =outmod_7; + //CCR2 = 124; - +P1dir |=bit2;k AP1sel |=BIT2; atP2dir |=BIT0; -P2sel |=BIT0; - -Tactl

Fin: Crystal Oscillator frequency M: PLL0CFG [] N: PLL0CFG [] FCCO: PLL output frequency (Phase Lock output frequency) = Fin * 2 * M/N (this is not the case with the calculation formula of S3C2440, for more information, see datasheet) CCLKSEL []: The frequency division value. Set the frequency division of the CCLK from the PLL0 output signal through the CCLKSEL + 1. CCLK: system clock = FCCO/(CCLKSEL + 1) PCLKSEL []: Set the PWM1 peripheral clock frequency. All PCLKSEL are two-digit, PCLK =

A long time ago, He transplanted the dot doctor program from stm32f103 to STM32F4-Discovery (stm32f407), battery, gyroscope and PWM motor control programs have been tested, running for a period of time, normal. The following pictures are all connected by dubang, gyroscope, serial port, and other peripherals. In addition, there is also the nrf24l01, but the program of the nrf24l01 can read and write registers, and no attempt has been made to communicat

1 // ----------------------------------------------------------- // Function Description: MC9S12XS128--PWM routine 3 // instructions for use: Realize Channel 3 (ptp3) output frequency is 1 kHz, duty cycle is 50% square wave, use an oscilloscope to observe 4 // Program Design: demok Studio (demok.taobao.com) 5 // design time: 2010.01.21 6 // snapshot // 7 # include

When using the STM32L function of a gpio, you need to configure the Register GPIOX_AFRL and GPIOX_AFRHSTM32F differs from stm32l hereToday to debug a PWM output program, how also out of the waveformIs missing the gpio_pinafconfig (GPIOA,GPIO_PINSOURCE7,GPIO_AF_TIM3); The focus is not on the waveform.void Pwm_init (){Tim_timebaseinittypedef tim_timebasestructure;Tim_ocinittypedef tim_ocinitstructure;Gpio_inittypedef gpio_initstructure;Rcc_apb1periphclo

:f_out=clk0;1:F_OUT=CLK1;2:F_OUT=CLK2;3:F_OUT=CLK3;4:F_OUT=CLK4;5:F_OUT=CLK5;6:f_out=clk6;7:F_OUT=CLK7;EndcaseEndmoduleThe realization of the non-fixed duty ratio (frequency adjustment, the duty ratio will follow the change)Module Pulse_gen(Input clk_in,Inputrst_n_in,Inputkey_menu,INPUTKEY_UP,Inputkey_down,Outputmenu_state,Outputregpulse_out);Debounce for Key_menuDebounce debounce_menu (. CLK (Clk_in),. Rst_n (Rst_n_in),. Key_n (Key_menu),. Key_state (menu_state));Debounce for KEY_UPDebounce deb

p2.0 pwm1.1void Als_init(void) //initialization{LPC_SC, Pconp |= (11) | ( 12) | (1); Turn on the clockLPC_SC-PCLKSEL0 = ~ (32); Clock 25MLPC_SC-PCLKSEL0 = ~ (34);p2.0Lpc_pincon-PINSEL4 = ~ (0x03l0); GPIOLpc_pincon-PINMODE4 = ~ (0x03l0); To enable pull-upLpc_pincon-pinmode_od2 = ~ (0x011); Push-Pull Normal modeP2dir(0) = 1; OutputLpc_tim1, TCR |= (11); Reset TimerLPC_TIM1-CTCR = 0x00; Timer modeLPC_TIM1PC = 0x00;LPC_TIM1-PR = 1; Prescaler, Count frequency 1mLPC_TIM1-MR0 = ; 25*100 2500 Frequency

= pclk/{pre-division value + 1}/{division value}// {Pre-division value} = 0 ~ 255// {Frequency division value} = 2, 4, 8, 16// Pclk: 50 MHz clock frequency: 6250 kHz scheduled 1 ms count: clock frequency * Scheduled time-1// 50000000/(16*8) = 390625Rgpbcon = (rgpbcon ~ 0x3) | 0x2; // set the gpb0 port to tout PWM 0b10Rt1_0 = (rt1_0 ~ 0xff) | 15; // prescaler0 = 15 + 1Rtcfg1 = (rtcfg1 ~ 0xf) | 0x2; // MUX = 1/8 0b0010Rtcntb0 = 50000000/(16*8)/freq;Rtc

The following accessories are used:Raspberry Pi 3 * *Brushless ESC 30A *Brushless Motor A2212 1400kv *7.4V Power Supply * *5V Power Supply * *Connecting Wire several The simple connection diagram is as follows: Code: Import Rpi.gpio as Gpio import time, sys #我用的第12个引脚 pin = Gpio.setmode (gpio). BOARD) Gpio.setup (PIN, Gpio. Out) #频率设置为400Hz p = gpio. PWM (PIN, max) p.start (0) #占空比从10开始, gradually added to the DC = Ten for i in range (+):

The selected stepper motor model is 28byj-48 (or mp28ga,5v, speed ratio 1/64), the driving circuit selects the ULN2003 Chip's drive board, the control sequence diagram is as follows: Four-Phase Eight beat: a->ab->b->bc->c->cd->d->da Its a, B, C, d

Servo control generally requires a 20ms time-base pulse, the high-level portion of the pulse is generally the 0.5ms~2.5ms range of angle control pulse part. In the case of a 180-degree angle servo, the corresponding control relationship is as

  Connect as shown in the following figure:   The resistor size of the photosensitive resistor is inversely proportional to the brightness. By measuring the voltage of the resistor, you can know the resistor size of the photosensitive resistor to

configured by the board support Code, but the intention was to Eventually reach that goal. On Raspberry Pi, Device Tree usage is controlled from/boot/config.txt. By Default, the Raspberry Pi kernel boots with device tree enabled. You can Completely disable DT usage (for today) by adding: Device_tree= To your config.txt, which should cause your Pi to revert Doing things after a reboot. If you want to disable the device tree, simply write the device_tree= in Boot/config

Transferred from: http://blog.csdn.net/weiqing1981127/article/details/8511676All rights reserved, reprint must explain transfer from http://my.csdn.net/weiqing1981127The original Nanjing University of Posts and telecommunications communication and information System Professional research two Wei QingA Overview of backlight back photon systemOur LCD screen often needs a backlight, adjust the brightness of the LCD screen backlight, where the backlight is not just light and not light two, but accor

(){Initialize the motor drive IO as the output modePinmode (Left_motor_go,output); PIN 8 (PWM)Pinmode (Left_motor_back,output); PIN 9 (PWM)Pinmode (right_motor_go,output);//PIN (PWM)Pinmode (right_motor_back,output);//PIN One (PWM)}void run (int time)//forward{Digitalwrite (Right_motor_go,high); Right Motor forwardDig

ArticleDirectory Introduction Build HDL Hardware settings Software Development Statement: This article is original works, copyright belongs to the author of this blog, If You Need To reprint, please indicate the source of http://www.cnblogs.com/kingst/ Introduction As an embedded software-core processor built on FPGA, niosii can add any provided peripherals as needed, you can also customize user logic peripherals and Custom User commands to meet various application requi

Each capture/compare channel is centered around a capture/compare register (including the shadow register), including the captured input (digital filtering, multiplexing, and pre-divider ), and the output part (comparator and output control ). The capture/compare module consists of a preload register and a shadow register. Only the pre-loaded registers are operated during the read/write process. In the capture mode, the capture occurs in the shadow register and then copied to the pre-loaded regi

timer when matching. You can choose to interrupt the timer. 5. There are 3 timer 0 and 4 timer 1 correspond to the external output of the matching register. The output of matching is as follows: Set to low when matching Set to high when matching Flip When matching No action during Matching 6. For each timer, up to four matching registers can be configured as PWM, and up to three matching outputs can be used as PW