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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
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
1 Preface This article simply introduces the Bluetooth protocol stack, including the HCI layer, ACL link, L2CAP layer, SDP service and several common profiles that let beginners of the Bluetooth protocol stackAn overall framework for the entire Bluetooth protocol stack is understood. 2 HCI Layer Control of 2.1 HCI command and Response Because different HCI com
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
Bluetooth bluetooth® technology is widely used in a variety of devices, and will continue to play a key role in the IoT world of IoT. Here are some tips on Bluetooth technology to prepare for reference.Bluetooth bluetooth® Technology was founded in 1994 with the name of a Danish king Harold Bluetoothin 10th century, wh
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
The abbreviation for the Serial Peripheral Interface (Serial peripheral interface,spi). is a high-speed, full-duplex, synchronous communication bus that occupies only four wires on the chip's pins. Motorola is first defined on its MC68HCXX series processors. The SPI interface is used primarily in eeprom,flash, real-time clocks, ad converters, and digital signal processors and digital signal decoders.The
Original URL: http://www.2cto.com/kf/201303/199175.htmlThe minimum Bluetooth required version is android2.0, and since the Android emulator does not support Bluetooth, apps running Bluetooth must be tested on the real machine.Bluetooth is an important short-range wireless communication protocol, widely used in a variety of devices (mobile phones, medical, automot
The first difference is of course the name:SPI (serial peripheral interface: serial peripheral interface );I2C (Inter IC Bus)UART (Universal Asynchronous Receiver Transmitter: Universal asynchronous transceiver)Second, the difference lies in the electrical signal line:The SPI bus consists of three signal lines: sclk, SDO, and SDI ). The SPI bus allows multiple SPI
http://blog.csdn.net/quhongwei_zhanqiu/article/details/41577235 SPI Interface Definition @spi annotations are defined Public @interface SPI { stringvalue () default ""; Specify the default extension point Only interface classes that have @spi annotations on the interface will find the extension point impl
(){ //deal with banan } } public class PeelOffFactory{ private Map For this method, the next time we want to add a new kind of fruit skinning, we just need to create a new fruit peeling class, let it implement the Peefoff interface just fine. The business logic implemented using the policy pattern is more flexible and is often used as a substitute for conditional statement blocks in programming. And the SPI mechanism is in fact simi
How to use Bluetooth with Android Bluetooth (details)I. Communication between bluetooth devices involves four steps Set the bluetooth device to find data transmission between devices that may or match devices in the LAN II. Specific programming implementation 1. Start the Bluetooth
Android4.3 (API level 18) introduces a built-in platform to support the central role of BLE, while providing APIs and app applications for discovering devices, querying services, and reading/writing characteristics. Unlike traditional Bluetooth (Classicbluetooth), Bluetooth low power (BLE) is designed to provide more significant low power consumption. This allows Android applications to communicate with low
The following are from: http://blog.csdn.net/mosquitolxw/article/details/25290315What is the difference between Service Provider Interface (SPI) and application Programming Interface (API)?More specifically, for Java libraries, what makes them an API and/or SPI?The API is the description of classes/interfaces/methods/... that's call and use to achieve a goalThe SPI
One, SPI mechanismHere is a concept of SPI, SPI English for service Provider interface is literally understood as the service provider interface, as in the name of the SPI to understand the SPI is the service provider interface My definition of
ObjectiveOpenWrt's newest kernel (3.14.28) has been able to support both read-write and erase operations for 32M SPI Flash. However, the system may be poorly considered or a bug in the MT7620 system, on the W25Q256 Development Board system configured MT7620, Unable to soft reset! after consulting the relevant data, found that the MT7620 default support 24bit (3byte) SPI address mode, and to support more tha
One, SPI mechanismHere is a concept of SPI, SPI English for service Provider interface is literally understood as the service provider interface, as in the name of the SPI to understand the SPI is the service provider interface My definition of
Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.I. What is Bluetooth?1.1 Buletooth is currently the most widely used wireless communication protocol1.2 Mainly for short-range equipment communication (10m)1.3 is commonly used to connect headphones, mouse and mobile communication devices.Two. Bluetooth-related APIs2.1 Bluetoothadapter:Represents a loc
After I wrote a simple SPI firewall program (only using IP filtering, but not packet filtering), I gave up research on SPI, however, a friend recently asked about the implementation of the SPI firewall, and now I will make a detailed analysis and summary of the SPI. First, let's take a look at the general implementatio
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