spi multiplexer

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Java SPI mechanism and usage examples

Introduction to JAVA SPIThe SPI is a service load method provided by Java, with the full name of the services Provider Interface. According to the Java SPI specification, we can define a service interface, where the implementation is provided by the corresponding implementation provider, i.e. the service provider. Then in the use of the SPI specification to obtai

SRAM, PSRAM, SPI Flash Miscellaneous

The current work is mainly in the RDA5981 platform for product development and design, in the design process to contact the SRAM, Psram and SPI Flash, so take this opportunity to collate the relevant knowledge.The following is a messy, mainly recorded the concept of SRAM, PSRAM, DRAM, SDRAM and the introduction of PSRAM, and the SPI Flash need to master some of the knowledge points. SRAM RDA5981 has 448KByt

LCD SPI interface Analysis

The LCD and CPU cables are divided into control lines and data lines. The control lines are generally based on the SPI protocol. We initialize the LCD registers through this. Under the premise that the output format of the main chip is fixed, LCD adjustment is the rest of the initial registers. Generally, we need to care about this part of LCD transplantation. The data line is used to transmit pixel data to the LCD, which generally does not need to be

Implementation of the 3-line SPI bus (ds1302 clock chip) of the MSP430 variant Edition)

For example, this is a three-line SPI bus of the Internet-called variant edition: A clock line, an enabling line, and a bidirectional Io line. One module and two files: // Spi3.c # include "typedef. H "# include" spi3.h "/******************************** * ************************************ name: init_spi3 Description: SPI3 initialization function parameter: (none) return :( none) Description: **************************************** * *************

Stm32 SPI bus

About SPI in Data Manual 2.3.18 serial peripheral interface (SPI)Up to two spis are able to communicate up to 18 Mbits/s in slave and master modes in fullduplexand simplex communication modes. the 3-bit prescaler gives 8 master modefrequencies and the frame is retriable to 8 bits or 16 bits. the hardware crcgeneration/VerificationSupports basic SD card/MMC modes.Both spis can be served by the DMA Controller

SPI of NRF51822

1 /** @brief Function for initializing a SPI master driver.2 *3 * @param [in] p_instance Pointer to SPI Master driver instance.4 */5 Static voidSpi_master_init (nrf_drv_spi_tConst*p_instance)6 {7uint32_t Err_code =nrf_success;8 9nrf_drv_spi_config_t config =Ten { One A. irq_priority =App_irq_priority_low, -. Orc =0x80, -. Frequency =nrf_drv_spi_freq_1m, the. Mode =Nrf_drv_spi_mode_0, -. Bit_ord

Vert.x Core Module (16) Streamline process secure SPI OSGi

worry about this. Metric SPI The default vert.x does not log any metric information. The Vert.x returns an SPI for other implementations and what can be added to the classpath. This metric SPI is an advanced feature that enables it to fetch events from vert.x and collect metrics. For more information about this, you can query the API documentation. In the case

SPI-driven porting and application testing under Linux __linux

The SPI-driven migration under Linux2.6.32 is shown in the following illustration: the following needs to modify some of the kernel code, the following actions: 1. Modify the arch/arm/mach-s3c2440/mach-mini2440.c file Add the following code after the include header file code line SPI Add by Shiguang#include #include static struct Spi_board_info s3c2410_spi0_board[] = {[0] = {. Modalias = "Spidev",. Bus

"STM32. Net MF Development Board Learning-10" SPI test touch screen coordinate acquisition

STM32F103XX CORTEX-M3 series of chips containing three-way SPI channel, Red Bull Development Board used two roads, SPI1 connection at45db161b model SPI flash,spi2 connection ADS7843 touch screen signal processing chip, SPI3 is best not to use, Because there is a conflict with the JTAG pin, there will be problems in debugging. The em-stm3210e Development Board, which does not contain a touch screen, uses onl

The SPI mechanism of Java

Today, we see spring MVC using the Java Validation Api (JSR-303) for validation and need to load a specific implementation (such as Hibernate Validator), which is not a problem at all, but it suddenly occurred to me what kind of loading process it was. , which means why can spring find hibernate validator as a concrete implementation of JSR-303?1. The SPI mechanism in JavaThis article is relatively easy to understand about the

CC1110F32 for SPI slave-side configuration

1, using the serial port 0 for SPI SlaveThe error settings are as follows:U0CSR = ~ (u0csr_mode) | U0csr_slave;The correct settings are as follows:U0CSR = (U0CSR ~u0csr_mode) | U0csr_slave;Where the macro is defined in Ioccxx10_bitdef.h, as shown below:// U0CSR (0x86)-USART 0 Control and Status #define U0csr_mode 0x80#define u0csr_re 0x40#define u0csr_slave 0x20#define U0CSR_ FE

SPI and sdio protocols

Serial peripheral interface (SPI: serial peripheralInterface) is a serial synchronous communication protocol (read and write at the same time), composed of SDI (serial data input), SDO (serial data output), sck (Serial shift clock ), CS (fromEnable signal) composed of four signals. CS determines the only slave device that communicates with the master device. If there is no CS signal, only one slave device can exist. The master device initiates communi

The SPI mechanism in Java __java related

the SPI mechanism in Java 1 Introduction of SPI mechanism The full name of the SPI is the service Provider Interface. Most developers may be unfamiliar because this is for vendors or plug-ins. A more detailed description is available in the Java.util.ServiceLoader documentation. Simply summarize the idea of the Java SPI

Interpretation of Cypeess USB3.0 program---SPI Read and write

Before we have read the Gpio and synchronous FIFO operation, let's look at an example of SPI read and write, which is the main program command reads and writes some data from the SPI. SPI Transfer subroutine look at: page address, byte count, buffer, read-write flag Because only one page of read or write, so read and write always start from the page address /*

The difference between SPI and API

Reproduced from Stack Overflow, original address: Http://stackoverflow.com/questions/2954372/difference-between-spi-and-api What 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/met

UART, SPI, and i²c explanations

To do SCM Development UART,SPI and I²c are our most commonly used hardware interface, I collected the relevant specific materials on these three kinds of interfaces are explained in detail.UartThe UART is a universal serial data bus that is used for asynchronous communication. The bus bidirectional communication, can achieve full duplex transmission and reception. In the embedded design, the UART is used for communication between the host and the auxi

Arm bare metal development (5) SPI

The following bare metal program is based on gt2440 and the compiler is a arm-linux-gcc-4.4.3. Program structure: This program only has one SPI. s file. Program process: first, the power-on Reset enters the reset exception. In the reset exception, call the subroutine to close the watchdog, initialize the system clock, initialize the serial port, and finally call SPI to send data, the data sent by

Explanation of cypeess usb3.0 Program-SPI read/write

The gpio and FIFO synchronization operations have been explained earlier. Let's take a look at an SPI read/write example. It is the main program command to read and write some data from SPI. SPI transmission Subroutine: page address, byte count, buffer, read/write flag Because only one page can be read or written, the read and write operations always start from t

About the 2.6 SPI driver, spidev, use the slave device.

ATMEL-based SPI Model Let's take a look at this article.ArticleAnalysis: Http://blog.chinaunix.net/u3/96265/showart_1925533.html [Post indicated source] http://blog.csdn.net/lanmanck However, some details are not mentioned. I would like to add it. If not, please point it out: 1. the driver has the concept of bus and equipment. SPI controller is the bus (

A brief introduction to SPI __java

Recently saw some of the company's framework and some of the open source framework seen before some of the service discovery and access are using the Java SPI mechanism. So simply summarize the idea of the Java SPI mechanism. The full name of the SPI is the service Provider Interface. Ordinary developers may be unfamiliar because this is for vendors or plug-ins.

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