spi multiplexer

| = 0x40000; // key. You must first set pclk to SPI clock; otherwise, the SPI-related registers cannot be set !!!Rsppre0 = 0x01; // you can specify the SPI baud rate.Rspcon0 = 0x19; // set to query modeRsppin0 = 0x02;For (I = 0; I {Rsptdat0 = 0xff;} // Initialize the deviceReturn 0;}Static int spi_release (struct inode * inode, struct file * file){Return 0;}Stat

SPI (Serial peripheral Interface: Serial Peripheral Interface ); SpiThe bus consists of three signal lines: serial clock(SCLK), serial data output(SDO), serial data input(SDI). SPIThe bus can implement multipleSPIdevices are connected to each other. ProvideSPIof the serial clockSPIdevice isSPIhost or main device(Master), other devices areSPIslave or slave device(Slave). The master-slave device can achieve full-duplex communication, and when there are

Motan Source Analysis II: Using the SPI mechanism for class loading Motan in the source code used a lot of SPI mechanism for the creation of objects, below we have a concrete analysis of its implementation methods. 1. In the actual jar package in the \meta-inf\services directory to introduce related files, such as the following image, I extracted the core jar file after the corresponding file list: 2. In t

1. What is the SPI for JavaSPI is all called (Service Provider Interface) and is a service delivery discovery mechanism built into the JDK. There are many frameworks that use it to do service expansion discovery, simply put, it is a dynamic substitution discovery mechanism, for example, there is an interface, want to run the dynamic to add to it implementation, you just need to add an implementation.Specifically, in the jar package "src/meta-inf/servi

Reproduced in the original: http://blog.csdn.net/hw5226349/article/details/50767454 thank you very much. After a period of research finally the tms320c6657 single-core and dual-core SPI Nor Flash program to write tune. Tools are predecessors of the work, there is a need to leave the mailbox, I have free to send. Principle reference Chanfong's "TI c66x series DSP multi-core boot research" paper. All processes of the loa

SPI extension mechanism Dubbo micro-container Extension mechanism function Introduction The 1.dubbo extension mechanism is very similar to the SPI mechanism in Java, but adds the following features:can easily get a desired extension implementation, Java's SPI mechanism does not provide such a function 2. The IOC dependency injection function is implemented fo

)); }1, Platform_driverFiles:/driver/spi/omap2_mcspi.cStatic Const structDev_pm_ops Omap2_mcspi_pm_ops ={. Resume=Omap2_mcspi_resume,};Static structPlatform_driver Omap2_mcspi_driver ={. Driver={. Name="Omap2_mcspi",. Owner=This_module,. PM= Omap2_mcspi_pm_ops},. Remove=__exit_p (Omap2_mcspi_remove),};Static int__init Omap2_mcspi_init (void) {Omap2_mcspi_wq= Create_singlethread_workqueue (/*Create a work queue*/omap2_mcspi_driver.driver.name); if(Omap

First, implement the filter interface 1, Consumer filter: Consumertracefilter.java PackageCom.dubbo.demo.Filter;ImportCom.alibaba.dubbo.rpc.*;ImportJava.util.Map;ImportJava.util.UUID; Public classConsumertracefilterImplementsFilter {@Override PublicResult Invoke (invokerthrowsrpcexception {Mapinvocation.getattachments (); //Setting ParametersStringstringmap.put ("Patentid", "0"); Stringstringmap.put ("Traceid", Uuid.randomuuid (). toString ()); System.out.println ("Generate TradeID:" +stringstri

Overview:The SPI (Serial peripheral Interface, Serial Peripheral Interface) is a four-wire serial synchronous bus that Motorola introduces. Full Duplex Master-Slave mode Synchronous communication Four line:sdi-receive data, Master sends to slavesdo-send data, slave sent to mastersck-clock, synchronous clock generated by masterss-chip selection signal, generated by the master, if only one, can be directly connected to the high levelWorkin

Mail: bookworepeng@Hotmail.com QQ: 196568501 Author: drivermonkey Phone: 13410905075 Tested hardware platform: Ti am335x Test code: /* * SPI testing utility (using spidev driver) * * Copyright (c) 2007 MontaVista Software, Inc. * Copyright (c) 2007 Anton Vorontsov Test results: Currently, the SPI Driver Interface transfers up to 4 K bytes of data at a time.

Reference http://www.fpga4fun.com/SPI2.html CLK is a 50 m crystal oscillator of FPGA To use the four-wire SPI mode, the SSEL signal must be available. 8-bit data mode, polarity = 0, phase = 1. Send data: Send the data to byte_data_tosent, and byte_sent_request provides a rising edge, so that byte_sent_int also gives the DSP a rising edge, triggering dsp spi reading. Receive data: When byte_received gene

This solution is based on NXP's lpc1768 microprocessor and uses Keil mdk4.70a as the development tool to automatically update programs through SPI. For this solution, see the NXP official application manual an11257. Program Design: The program consists of three parts: bootloader, low-zone user program, and high-zone user program. Bootloader implements program jump and IAP program burning. The low-Zone Program is located at 0x1000 ~ of the lpc1768 ~ 0

This article allows reprint, please specify the source:Http://blog.csdn.net/fulinusThe Linux kernel code is too big, a small module will let you unprepared, this afternoon resolved to take the SPI drive a good look.First analyze the spidev.c file, which defines the members in the struct file_operations structure. Members have Spidev_write, Spidev_read, and Spidev_ioctl, and the first two implement half-duplex communication, which implements full-duple

When writing drivers, it is generally necessary to add node information to the device tree, which provides a way to add device information directly to the drive.The drive template for I²c is as follows#include The SPI driver template is as follows#include The SPI and IIC drivers under Linux are not programmed to add device information on the device tree

spi_master *master; : : sizeof(*info)); : mutex_lock (board_lock); : list_add_tail (bi->list, board_list); 17: if master first registers, then performs a spi_match_master_to_boardinfo match, 19: : * / : list_for_each_entry (master, spi_master_list, list) : spi_match_master_to_boardinfo (master, bi->board_info);At : mutex_unlock (board_lock); : } : : return 0; : }

SPI is all called (Service Provider Interface) and is a service delivery discovery mechanism built into the JDK. There are many frameworks that use it to do service expansion discovery, simply put, it is a dynamic substitution discovery mechanism, for example, there is an interface, want to run the dynamic to add to it implementation, you just need to add an implementation.When the provider of the service provides an implementation of an interface, it

First of all, say something.Yesterday in the look at the JDBC source code when see Drivermanage.getconnection () This method, click into the Drivermanage class see Getconnection () method of the core statement does the following for (Driverinfo Adriver:registereddrivers) {Connection con = aDriver.driver.connect (URL, info);Where Driver is a member variable of the Driver type in the Driverinfo class, and Driver (Java.sql.Driver) is an interface, the Connect method that points in is just a method

NSS PIN for STMFirst we say that the pin has two levels to note, one is the external level connected to the NSS pin, and the other is the internal level of the NSS pin.Then we know that at the time of SPI Communication, master must be able to communicate at the internal level of the NSS pin before it is high, and the slaver can communicate at low levels at the internal level of the NSS pin. This is a precondition.We know that there are two ways to man

The full name of the SPI is the service Provider Interface. Ordinary developers may be unfamiliar because this is for vendors or plug-ins. A more detailed description is available in the Java.util.ServiceLoader documentation. In simple terms, the implementation class of the interface is specified through the configuration file. When we develop a framework, a set of mechanisms, a plug-in or a set of APIs, if the need for Third-party service support, ca

I use the ADC081SD chip, Cpol:cs is pulled to low power sclk is high, Cpol for 1,cs was pulled to low power sclk for 0 o'clock, Cpol for 0;The Cpha:cs is pulled to the low level after the first clock edge is 0, and the second clock along the acquisition data is 1.When the corresponding acquisition data bits of the clock rise are stable, the rising edge is collected, and the clock falling along the corresponding acquisition data bits are collected along the falling edge.As shown in the SCLK, the