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DM355 and CMOS

Kirill Brilliantov
Genius 3510 points

Hello!

I have a TMX320DM355 Evalution Module 702065 Rev C 30 Nov 07 and I have to connect CMOS MT9M131 C12STC.

I slightly modify mt9001.h, defined my register and, when I run module, I get an error:

I2C write failed<6>
I2C write failed<6>
I2C write failed<6>
I2C write failed<6>

My debug in dmesg:

Starting mt9m131_i2c_init
Stoping mt9m131_i2c_init with err = 0
Starting mt9m131_i2c_cleanup
Stoping mt9m131_i2c_cleanup
Starting mt9m131_i2c_init
Stoping mt9m131_i2c_init with err = 0
Starting mt9m131_i2c_cleanup
Stoping mt9m131_i2c_cleanup
Starting mt9m131_i2c_init
Stoping mt9m131_i2c_init with err = 0
Starting mt9m131_i2c_cleanup
Stoping mt9m131_i2c_cleanup
Starting mt9m131_i2c_init
Starting mt9m131_i2c_probe_adapter
Stoping mt9m131_i2c_probe_adapter
Starting mt9m131_attache_client
mt9m131_attache_client addr = 5d
mt9m131_attache_client driver = bf001908
mt9m131_attache_client adapter = c02fa4f8
Stoping mt9m131_attache_client with err = -16
Succesfully register mt9m131_i2c_registration = 1.
 I2C write failed<7>Stoping mt9m131_init<7>Stoping mt9m131_i2c_init with err = 0

How I can solve this problem?

 

I have modified driver/media/video/davinci/mt9t001.c by inserting printk(KERN_DEBUG) message.

But after reboot I see in dmesg only output mt9t001_i2c_init:

dmesg | grep mt9t001
Starting mt9t001_i2c_init
Stoping mt9t001_i2c_init

I have tryed with and without parametrs v4l2_video_capture=device:MT9T031.

My boot options:

DM355 EVM # printenv
bootdelay=3
baudrate=115200
bootfile="uImage"
bootargs=console=ttyS0,115200n8 root=/dev/mtdblock3 rw rootfstype=yaffs2 ip=off mem=116M video=davincifb:vid0=720x576x16,2500K:vid1=720x576x16,2500K:osd0=720x576x16,2025K davinci_enc_mngr.ch0_output=COMPOSITE dac
bootcmd=nboot 0x80700000 0 0x400000;bootm
stdin=serial
stdout=serial
stderr=serial
videostd=ntsc
videomode=video=davincifb:vid0=720x576x16,2500K:vid1=720x576x16,2500K:osd0=720x576x16,2025K davinci_enc_mngr.ch0_output=COMPOSITE davinci_enc_mngr.ch0_mode=ntsc v4l2_video_capture=device:MT9T031

 

Thank you and excuse me for my bad english.

  • 0
    TI__Mastermind 41665 points

    I am not very familiar with the MT9M131 however if you are getting I2C errors I would first check to ensure that the MT9M131 is connected properly to the I2C bus and that it uses the same addresses as the CMOS sensors that the driver package supports. An I2C error like this could actually mean a number of things, since this is the initial communication with the sensor it could mean anything from the sensor not being powered up to the driver trying to access the wrong I2C addresses.