spi multiplexer

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

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

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

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: **************************************** * *************

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

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

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

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

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

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

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

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 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