Video capture interface camera link application in 8148

(1) Application background

(2) Camera link Introduction

(3) Camera link and 8148

(4) Camera link Application Example

---------------------AUTHOR:PKF

----------------------------time:2015-2-28

----------------------------------qq:1327706646

(1) Application background

Last year began to contact the camera link, just started to listen to think ti is something, after the start, he is a video transmission protocol, now and 8148 in the 9135 decoding chip together, as 16-bit data input, the middle plus a transfer board, 24-bit rgb,d0 to d15pin feet, The inputs can be input using FPGAs. Ray X Company has this application.

(2) Camera link Introduction

Camera Link has evolved from Channel Link technology, adding some transmission control signals based on channel link technology and defining some relevant transmission standards. Any product with a "Camera link" logo can be easily connected. The camera link standard is customized, modified and released by AIA, the American Society of automation, and the camera link interface solves the problem of high-speed transmission.

Interface ConfigurationCamera Link's interface has three configuration base, Medium, full, mainly to solve the problem of data transmission, which provides different speed of the camera to provide the appropriate configuration and connection.BaseBase occupies 3 ports, (a channel link chip contains 3 ports), 1 channel link chips, 24bit video data. One base uses one connection port. If you use 2 of the same base interface, you become a dual-base interface. Maximum transfer speed: 2.0gb/s @ 85MHZMediumMedium = 1 Base +1 Channel Link basic unit max transfer speed: 4.8gb/s @ 85MHZ FullFull = 1 base + 2 Channel Link basic unit Maximum transfer speed: 5.4gb/s @ 85MHZ

Configuration	Supported ports	Number of chips	Number of interfaces	Effective data bandwidth
BASE	A,b,c	1	1	75m*8*3=1.8gbps
MEDIUM	A,b,c,d,e,f	2	2	75m*8*6=3.6gbps
Full	A,b,c,d,e,f,g,h	3	2	75m*8*8=4.8gbps

(3) Camera link and 8148

In the 8148 Core board sensor 23+23 Matthews Foot on the addition of an adapter board, you can put 24-bit, 16-bit RGB,YUV data input, with the camera link, video data input mode becomes diversified, FPGA, sensor, HDMI, SDI, VGA, Dvo and so on can input data, in TI's capture link and usecase in the Change collection Viport port, acquisition mode, acquisition bits, the limit of the field, the acquisition of clocks.

Char *gcapturelink_portname[] = {
"VIP0 PortA", "VIP0 PORTB", "VIP1 PortA", "VIP1 PORTB",
};

Char *gcapturelink_ifname[] = {
"8-bit", "16-bit", "24-bit",
};

Char *gcapturelink_modename[] = {
"Non-mux Embedded Sync",//hdmi default input
"Line-mux Embedded Sync",
"Pixel-mux Embedded Sync",
"Non-mux discrete sync-hsync_vblk",
"Non-mux discrete Sync-hsync_vsync",//row field mode
"Non-mux discrete sync-actvid_vblk",
"Non-mux discrete Sync-actvid_vsync",
"Split line Embedded Sync"
};

Vport port in UseCase in the modification did not take effect, the latter had to be in the VPSS system_const.c in the init function is changed to a fixed 0, before it takes effect

(4) Camera link Application Example

FPGA Xilink

Http://www.baike.com/wiki/cameraLink

http://baike.baidu.com/link?url=MckH3wDxW6aSFYQ0Mri_V-Dv7mZCZsmdeenxNQmGEOgZpp61KTzkHjU96-_h9YWoEwpIF5MpTPMaexdb0icF5a

Http://en.wikipedia.org/wiki/Camera_Link

Http://wenku.baidu.com/link?url= 5mdkmmm4bggi7grdgskjqhwtuitr6lardarvijru4aafojlibrvpzx0nfxej63dr8suypqz6yoogsgysekikc4uteehhfbffrspx_nfrzzu

Http://zhidao.baidu.com/link?url=rkr-Eme44HuK83ikAuYOoZRXHh12ISuiGID9ayce4JJaTUCO5QjOyVHRDhQKvuRgfVoVC1c1BQSZOowu1hRDKa

Http://en.wikipedia.org/wiki/Camera_Link

Video capture interface camera link application in 8148