Thoughts on DaVinci platform development

  After ten months of hard work, we finally successfully implemented two-way D1 + two-way CIF h264 encoding on dm365, and implemented four-way D1 + four-way CIF h264 encoding on dm368. Throughout the development process, there were anger,

The wireless router cannot generate signals.

When I go home at night, the wireless router cannot generate wireless signals? What's going on? When the power supply is connected, the wireless router must have a signal, right? Is it a configuration problem? Enter 192.168.1.1 or open the webpage.

MTD Technology in uClinux (1): flash drive implementation

The development environment is: uClinux-2.6, bf561, the compiler is vdsp4.5 1 norflash: am29lv320mtAm29lv320mt is a 4 m, 16-bit norflash that supports the CFI interface. Its address space is 0x2000 0000 ~ 0x2040 0000. 1. Configure asynchronous

Home has a treasure of treasure

The little girl is almost five years old. One day, I told a story to the girl and asked a question: "How can we make the house fly ?" Little girl: "A bomb can be installed under the house, and a rocket can be bound to the house ." I am smart: "Can I

See the basic structure of the NS2.

The following example is provided in the document of NS2. some basic concepts of NS2. Step 2: Create a simulation manager simulatorset NS [New simulator]; # Step 2, create the file set f [open out. tr w] $ NS trace-all $ fset NF [open out. NAM w] $

Extended Section:. CommandLine in DOJ

  Happy shrimp Http://blog.csdn.net/lights_joy/ Lights@hb165.com   This article applies Bfinutils-2.19 Vs2008 Visual DSP +++ 5.0   Reprinted, but keep the author information   The DOJ

File Management-change the file owner

1. Related Function Description   # Include # Include Define the function int chown (const char * path, uid_t owner, gid_t group );Function Description chown () changes the owner of the file specified by the parameter path to the user represented by

Memory ing I/O

1. Concept Creates a ing relationship between a file and a buffer in the memory. The user reads and writes the buffer, which is equivalent to reading and writing the corresponding file.   2. Create memory ing # Include Define the function void *

Inode: I _mode

  After loading rootfs. initramfs In the uClinux kernel, test the inode corresponding to each dentry and find something that is incomprehensible: The following code is used to determine whether a struct dentry is a directory: If (s_isdir (pentry-> d_

Comparison between bf561 and dm365 (3): colinux disk preparation

This article applies ADSP-BF561 Davinci-DM365 Reprinted, but keep the author information Happy shrimp lights@wo.com.cn During colinux installation, the fedora used as the root file system is only 4 GB, which is obviously too small. We create a

Section (1) in the VC application: Preparation

Happy shrimp Http://blog.csdn.net/lights_joy/ Lights@hb165.com This article applies XP SP3 Vs2008   Reprinted, but keep the author information   We know that a program will contain multiple sections, such as code and data, after it is generated.

Network Programming basics-non-blocking Socket

1. Non-blocking Network Program-server side Because the socket is a special file, you can change the blocking status of the socket by changing the blocking status of the file. When the socket is set to a non-blocking status, if you perform

This evening, I learned a little bit about address management.

In recent days, I have been reading a DD source. I found that the management of the address cannot be understood. I searched for a night and read a lot of articles. I found that I am still confused. Before going to bed, let's write down today's

Inter-process communication-semaphores

1. Create a semaphore   # Include Int segget (key_t key, int nsems, int flag );   Semop is used to operate a semaphore set.   # Include Int semop (INT Semid, struct sembuf semoparray [], size_t NOPs );   NOPs indicates the number of elements in

Socket (3)

A typicalTCPPort ScannerConnectThe function tries to connect the server to determine whether the port on the server is open. This scanner is multi-threaded.WinSockMost programming uses multithreading technology to make full use of bandwidth,

Volatile keyword description

The volatile keyword is a type modifier that uses the type variables it declares to indicate that it can be changed by unknown factors in some compilers. When variable I declared with the volatile keyword is accessed every time, the execution part

Atomic operation, spin lock

An atomic operation is an operation that is not interrupted by other code paths during execution.   The Linux Kernel provides a series of functions to perform atomic operations in the kernel. These functions are divided into two types, namely,

H.264 MVPs explanation

MVP is predicted based on the MV values of blocks A, B, and C in the frame. Then, the MVP is added to the current vertex o to obtain the new matching vertex x, search on the basis of the new vertex x to obtain the smallest vertex Y in the mcost, and

Htons () Usage

Htons () Description: Converts the unsigned short integer count of the host to the network byte sequence. # Include U_short Pascal far htons (u_short hostshort ); Hostshort: The 16-digit host in bytes. Note: This function converts a 16-digit

H.264 data segmentation

When data separation is used, the source encoder arranges different types of separation in three different buffers, and the size of the split must be adjusted to ensure that it is smaller than the MTU length, therefore, it is an encoder rather than

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