spi pwm

What is SPI The SPI is the service Provider Interface, which provides the interface. SPI thought Abstract in our system of the various modules, often have a lot of different implementations, such as the program of the log module, XML parsing module, the JDBC module scheme. In the object-oriented design, we generally recommend that the modules are base

Digression: In the face of success and failure, a person has no " champion Heart ", directly affect his performance.A few weeks ago to analyze the Linux SPI driver Framework, it is clear why, for such a huge framework, not every line of code to knock on their own, because the predecessors have already set up the framework, as the driver of the developers we just need to figure out which part of the need to modify or re-write it OK.Based on the concept

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

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

The S3C2440 contains two serial peripheral device interfaces (SPI ports), each of which has two 8-shift register for sending and receiving, respectively, in one SPI communication, data is synchronously sent (in serial mode) and received (in serial mode ). The rate of 8-bit serial data is determined by the content of the relevant control register. If you only want to send data, some virtual data will be rece

1. IntroductionThe SPI full name is the service Provider Interface, the provider interface, the service usually refers to an interface or an abstract class, the service provider is a concrete implementation of this interface or abstract class, by the third party to implement the interface to provide specific services. SPI provides a dynamic mechanism for extending applications, often as an extension of the

Disclaimer: This article is an original work and copyright belongs to the author of this blog.All. If you need to repost, please indicate the sourceHttp://www.cnblogs.com/kingst/ Introduction In this section, let's talk about the usage of the SPI bus in the nioshi II. First of all, let's briefly introduce the SPI bus. SPI is short for serial peripheral int

The ad7708 is a 16-bit Σ-△type adconverter chip. in low-frequency applications, the ad7708 can be used as the complete front end of a single power supply. The ad7708 contains a PGA (Programmable Gain Amplifier) to enlarge the signal. The PGA range is 20-28, which is programmable, when the reference voltage is V, the voltage from 20mv to 2.56v can be measured. The ad7708 and ad7718 pin functions exactly the same, but the number of digits ad7718 is 24 bits. If you use 7718, you only need to change

SPI (Serial peripheral Interface), serial Peripheral interface. SPI is a high-speed, full-duplex, synchronous communication bus.The SPI interface typically uses 4 lines of communication:Miso Master device data input, from device data outputMOSI Master device data output, from device data inputSCLK clock signal, with main device generatedCS from the device chip se

1. SPI Bus structureSPI Serial Peripheral Interface, is a high-speed, full-duplex, synchronous communication bus. Adopt master-Slave mode architecture, support multiple slave, generally only support single masterThere are 4 signal lines in the SPI interface, namely:Device Selection Line (SS), clock Line (SCK), serial output data cable (MOSI), serial input data cable (miso).2. Data transfer processThe master

The Serial Peripherals Interface (serial peripheral INTERFACE,SPI) is developed by Motorola to provide a low-cost, Easy-to-use interface between microcontrollers and peripheral chips (SPI is sometimes referred to as a 4-line interface). This interface can be used to connect memory, Ad/da converters, real-time clock calendars, LCD drives, sensors, audio chips, and even other processors. Currently, there are

: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 (+):

Principles, differences and Applications of SPI, I2C, and UART Serial Bus 1. UART is a two-line interface. One transmission and one receiving interface can communicate with each other in full duplex mode, and the number of lines is relatively small. Data is transmitted asynchronously, with strict timing requirements on both parties, and the communication speed is not fast. It is used most frequently for multi-host communication.2. Compared

Serial communication: UART, SPI, i²c differential "reference"1, the UART is two lines, one sends a receive, can be full duplex communication, the number of lines is also relatively small. The data is transmitted asynchronously, the timing requirements of both sides are stricter, and the communication speed is not very fast. The most used on multi-machine communication.2, SPI interface and above the UART, mo

SPI Communication Protocol The SPI is a synchronous serial communication interface.SPI is the abbreviation of English serial Peripheral interface, as the name implies is the serial peripheral device interface. SPI is a high-speed, full-duplex, synchronous communication bus, the standard SPI also uses only 4 pins, comm

1: Configure PIN for SPI function At the end of the board-mx6q_sabresd.h, the copy is redefined (To add SPI2 as an example) [CPP]View Plaincopy "FONT-SIZE:18PX;" > MX6Q_PAD_EIM_CS0__ECSPI2_SCLK, Mx6q_pad_eim_cs1__ecspi2_mosi, Mx6q_pad_eim_oe__ecspi2_miso, MX6Q_PAD_CSI0_DAT11__ECSPI2_SS0, After that, the board-level file BOARD-MX6Q_SABRESD.C will have related functions for the unified initialization