spi pwm

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

Linux Kernel SPI subsystem architecture analysis (clear) There are two types of equipment on the SPI bus: one is the main control end, which is usually used as a sub-module of the SoC system. For example, many embedded mpus usually contain SPI modules. One is the controlled end, such as flash and sensors of some SPI in

Pulse Width Modulation, or PWM, is a technique for getting Analog results with digital means. digital control is used to create a square wave, a signal switched between on and off. this on-off pattern can simulate voltages in between full on (5 volts) and off (0 volts) by changing the portion of the time the signal clock Ds on versus the time that the signal clock DS off. the duration of "on time" is called the pulse width. to get varying analog value

The chip used in this article is ipv8s103f3. The following describes how to configure tim2 Channel 1 as the PWM output. 1. Register Configuration 4-bit pre-divider, counter counting frequency fck_cnt = fck_psc/2 ^ (PSC []) = 16 m/2 ^ 0 = 16 m The count cycle is 1/16 us, that is, the counter counts every 1/16 us. Tim2_pscr = 0x00; // frequency division = 0 16 m Automatic Reload register, When the automatic reload register is set to 0, the co

[PURPOSE] The output of 7-way PWM signals with different duty cycles is a required example of each version of the St library. The main purpose of this experiment is not to show the powerful PWM function of the ST chip, but to complete accurate output computation. [Experiment content] Output 7-way PWM signal and use the oscilloscope to measure the output.

The Arduino is really good,Already addicted.This is a wind tunnel stabilized pellet system.First, the component moduleArduino FrontArduino PIN WiringThe drive board, it's Freescale's little broken car.Power.Wind tunnelFan modelSecond, the Arduino codeIt's a code of words.#include intinputpin=4;//define ultrasonic signal receiver pin ECHO to D4 intoutputpin=5;//define ultrasonic signal transmitter pin TRIG to D5 intPWM =6;//PWM output D6

Main function Accept: Using the MCU STM8S105C6 PWM Channel 2 PC2 to do the breathing light has been verified OK, ah//Ah, this PWM setup just started with a little trouble, because it is their own groping, take some time, or conquer. The child functions used are all called stm8s in the library function stm8s_tim.c. Macro definition://Divider macro//Counter clock frequency (fck_cnt) equals fck_psc/(pscr[15:0]

About I2C and SPI bus protocols Iicvs SPI Currently, in the low-end digital communication application field, we can see IIC (Inter-Integrated Circuit) and SPI (serial peripheral interface) everywhere. The reason is that these two communication protocols are very suitable for close-range and low-speed chip communication. Philips (for IIC) and Motorola (for

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

Stm32--spi InterfaceTenet: The learning of technology is limited and the spirit of sharing is limitless.First, SPI Agreement " serialperipheral Interface "Serial Peripheral interface, is a high-speed full-duplex communication bus. Communication between ADC/LCD and MCU.1 , SPI Signal LineThe SPI contains 4 buses, and th

Transferred from: http://blog.csdn.net/droidphone/article/details/23367051/Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Directory (?) [-] Hardware structure Working time series Software architecture SPI Controller Driver SPI Universal Interface Package layer SPI