2008-04-14 04:32:57 adv7183b frame capture program

Bastien Briec (FRANCE)

Message: 54192 hello, I work on a cm-bf537e with an ext-bf5xx-video, I use the ppifcd framecapture driver and I try the following test program in order to get a picture :

#define IMG_WIDTH 640

#define IMG_HEIGHT 480

#include <stdio.h>

#include <stdlib.h>

#include <fcntl.h>

#include <unistd.h>

#include <sys/ioctl.h>

#include "bfin_ppi.h"

#include "pflags.h"

void getImage();

char rawImgBuff[IMG_WIDTH*IMG_HEIGHT*1]; //buffer to store frame from PPI port

int main( int argc, char** argv )

{

int fd_oe;

fd_oe = open("/dev/pg13", O_RDWR, 0);

if (fd_oe < 0) {

printf("open error pg13 \t\n");

return -1;

}

ioctl(fd_oe, SET_FIO_DIR, OUTPUT);

ioctl(fd_oe, SET_FIO_INEN, INPUT_DISABLE);

write(fd_oe, "0", sizeof("0"));

int fileDes; //file descriptor variable

getImage();// call getImage to capture frame from PPI port

fileDes=creat("capturedImg.raw",O_WRONLY); //create file "capturedImg.raw"

write(fileDes,rawImgBuff,IMG_WIDTH*IMG_HEIGHT*1);// write image to that file

close(fileDes);//close image file

return 0;

}

void getImage(void)

{

int fd;

fd = open("/dev/ppi0", O_RDWR,0);

if (fd==-1)

{

printf(" error opening device. fd=-1\n");

exit(1);

}

ioctl(fd, CMD_PPI_LINELEN, IMG_WIDTH);

ioctl(fd, CMD_PPI_NUMLINES, IMG_HEIGHT);

ioctl(fd, CMD_PPI_PORT_DIRECTION, CFG_PPI_PORT_DIR_RX);

ioctl(fd, CMD_PPI_XFR_TYPE, CFG_PPI_XFR_TYPE_646_AF);

ioctl(fd, CMD_PPI_FIELD_SELECT, CFG_PPI_FIELD_SELECT_1);

ioctl(fd, CMD_PPI_PACKING, CFG_PPI_PACK_ENABLE);

ioctl(fd, CMD_PPI_SKIPPING, CFG_PPI_SKIP_ENABLE);//set skipping to get greyscale image from ADV7183

//otherwise remove this line

ioctl(fd, CMD_PPI_DATALEN, CFG_PPI_DATALEN_8);

ioctl(fd, CMD_PPI_SET_DIMS, CFG_PPI_DIMS_2D);

ioctl(fd, CMD_PPI_SETGPIO, 1);

read(fd,rawImgBuff,IMG_WIDTH*IMG_HEIGHT*1);

close(fd);

};

The first problem is I get a file which size is 294912(1024*288?) instead of 307200(640*480) and i don't know why, and the other is about the ioctl command, here is any documentation about the meaning of the CMD_PPI_* for the configuration of the ppi.

Bests regards,

Bastien

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2008-04-15 05:46:55 Re: adv7183b frame capture program

Yi Li (CHINA)

Message: 54250 did you read:

http://docs.blackfin.uclinux.org/doku.php?id=sample_ppi_driver

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2008-04-15 10:49:35 Re: adv7183b frame capture program

Bastien Briec (FRANCE)

Message: 54282 yes I read it but I don't want to do my own driver, i just want to use the ppifcd one, I already configure the adv7183 with i2c and am able to see the video using the direct loop throught the adv7171 but I can't capture a frame, do I need to synchronize with the dma or is it done in the driver, cause there is no fsc pin

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2008-04-15 22:33:35 Re: adv7183b frame capture program

Yi Li (CHINA)

Message: 54296 Hi,

Please refer to the test case: uclinux-dist/user/blkfin-test/ppifcd-test/. As the Readme.txt in the folder says:

"The test application defaults to a Micron MT9M001 1.3 Megapixel CMOS digital imagine sensor.

(1280 x 1024 pixels). In case you want to use this application with an different sensor,

you have to do some slight modifications to the source code in ppifcd_test.c."

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2008-04-16 02:56:59 Re: adv7183b frame capture program

Yi Li (CHINA)

Message: 54303 BTW, if you just want to get raw image from adv7171 framebuffer driver, you can refer to: http://docs.blackfin.uclinux.org/doku.php?id=framebuffer

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2008-04-16 08:58:18 Re: adv7183b frame capture program

Bastien Briec (FRANCE)

Message: 54333 I use the ppifcd_test program I modify for the adv7183b (the gpio pin oe) but I don't get a correct frame, I see in adsp-ppifcd.h that there where a configuration like :

#ifdef MT9V022

#define POL_C 0x0000

#define POL_S 0x0000

#define PIXEL_PER_LINE 720

#define LINES_PER_FRAME 488

#define CFG_GP_Input_3Syncs 0x0020

#define GP_Input_Mode 0x000C

#define PPI_DATA_LEN DLEN_8

#define PPI_PACKING PACK_EN

#define DMA_FLOW_MODE 0x0000 //STOPMODE

#define DMA_WDSIZE_16 WDSIZE_16

#endif

I think I have to do the same for the adv but where can i find the values to put in those define and does the driver work without hardware synchronization without hsynch and vsynch and fsynch and how to synchonize with the soft

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2008-04-17 04:09:35 Re: adv7183b frame capture program

Bastien Briec (FRANCE)

Message: 54388 I use the bfin_ppi.c driver instead of the bfin_ppifcd.c, but when running my frame capture program i get the following error :

PPI Error: PPI Status = 0x100

PPI Error: PPI Status = 0x500

PPI Error: PPI Status = 0x100

PPI Error: PPI Status = 0x500

PPI Error: PPI Status = 0x100

PPI Error: PPI Status = 0x1000