tag:blogger.com,1999:blog-5879050571098780501.post4216154803100092755..comments2023-07-29T17:37:04.170+05:30Comments on The Code Artist: Omnivison ov3640 i2c sccbUnknownnoreply@blogger.comBlogger81125tag:blogger.com,1999:blog-5879050571098780501.post-90159700999236606972020-06-05T00:21:26.724+05:302020-06-05T00:21:26.724+05:30Hello, rather late to your article, but thank you,...Hello, rather late to your article, but thank you, very informative. <br />If I may ask you, I don't know if you recall, what is the response time of these cameras to the register writes? <br />I'm wondering if adjustments to the shutter and other parameters can be done per-frame. Two examples would be to increase dynamic range by combining frames with different exposures, or quickly windowing into image details at higher resolution.<br />Thanks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-64958151373645655192017-10-25T18:27:00.379+05:302017-10-25T18:27:00.379+05:30why someone goes all the way to define their own b...why someone goes all the way to define their own bus-specs when the hardware obviously works on I2C??? <br /><br />Obvious... to save millions in royalties they'd have to pay Philips.<br /><br />Sony did a very similar thing with their earlier Triniton TVs so they weren't crippled with PAL royalties.<br /><br />Answer to all questions, follow the money trail.....<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-11737790463312207522014-12-09T12:33:27.743+05:302014-12-09T12:33:27.743+05:30Any one kindly post the code to "capture the ...Any one kindly post the code to "capture the image using OV5642 module" which is directly connected to Arduino without any shield.<br /><br />Thank you.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-53591596893001778792014-12-09T11:44:21.549+05:302014-12-09T11:44:21.549+05:30hello sir,
im using OV5642 camera module with ardu...hello sir,<br />im using OV5642 camera module with arduino .Do you have any code related to it.kindly post it .i have been searching for it from many days.i didnt find anything related to it.i ahve directly connected the camera module to ardunio mega.i need a code to take a picture.<br />Thank you Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-52552185570341704982014-11-13T19:50:45.612+05:302014-11-13T19:50:45.612+05:30Azzy,
I'm hoping to attach an OmniVision came...Azzy,<br /><br />I'm hoping to attach an OmniVision camera module to a BeagleBone Black for a coin scanning application I'm developing. <br /><br />Have you had any luck getting the Cubie and Beagle to talk to each other?<br /><br />RayHAnonymoushttps://www.blogger.com/profile/10640375021440297987noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-51196631112841744952014-09-10T00:17:16.803+05:302014-09-10T00:17:16.803+05:30Hello Chinmay V S
I am using OV5642 camera sensor ...Hello Chinmay V S<br />I am using OV5642 camera sensor with IMX6 CSI0 interface, i am facing some issue.<br />1. I2C is not getting detected<br />2. OV5642 camera sensor is not getting detected<br /><br />link for connection b/w imx6 and OV5642 camera, source(code):<br />https://www.dropbox.com/sh/qooc04hca6tte3w/AAB01k0KmiagLkfLSwxz4QIXa?dl=0<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-35506910933817473002014-08-04T20:23:10.796+05:302014-08-04T20:23:10.796+05:30Hi, I am working OV5640 camera sensor. It is worki...Hi, I am working OV5640 camera sensor. It is working properly at 720p with frame rates of 30fps and 20fps. But at 10fps there is lot of noise in the video.<br />It is similar to the fixed pattern noise explained in the following link-<br />http://www.cambridgeincolour.com/tutorials/image-noise.htm<br /><br />Can you please suggest some appropriate register settings that could reduce this noise.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-75550896368118122262014-07-17T12:11:44.633+05:302014-07-17T12:11:44.633+05:30now it is working with
http://read.pudn.com/downlo...now it is working with<br />http://read.pudn.com/downloads189/sourcecode/embed/890065/TI_EVM_3530/SRC/CSP/OMAP/CAMERA/Sensor/OV3640/ov3640.h__.htmAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-45679682681000949182014-07-13T18:21:50.725+05:302014-07-13T18:21:50.725+05:30i have a ov3640 working with a STM32F429. Its well...i have a ov3640 working with a STM32F429. Its well working with a resolution of 640x480. when i try to change the resolution to 1600x1200 with<br /><br />{0x3362 ,(((V_PX+6) & 0xFF00)>>4) | (((H_PX+8) & 0xFF00)>>8)},<br />{0x3363 ,((H_PX+8) & 0xFF)},<br />{0x3364 ,((V_PX+6) & 0xFF)},<br />{0x3403 ,0x42},<br />{0x3088 ,(H_PX & 0xFF00)>>8},<br />{0x3089 ,(H_PX & 0xFF)},<br />{0x308a ,((V_PX+2)& 0xFF00)>>8},<br />{0x308b ,((V_PX+2)& 0xFF)},<br />{0x3f00 ,0x09},<br />{0x3400 ,0x01},<br />{0x3404 ,0x30},<br /><br />the vsync-signal gets lost. Someone can help me how to get a better resolution then vga?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-56179215025323551672014-06-17T06:43:15.474+05:302014-06-17T06:43:15.474+05:30aaah... :-) that you go. Glad to know you got it w...aaah... :-) that you go. Glad to know you got it wokring.TheCodeArtisthttps://www.blogger.com/profile/11629092532561603507noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-4467056654177331532014-06-17T01:07:36.693+05:302014-06-17T01:07:36.693+05:30the camera, by the way, is the model ov5642. I'...the camera, by the way, is the model ov5642. I'm using a clock of 25Mhz as input of XCLK pin. the rest of the registers remain with their default valueAnonymoushttps://www.blogger.com/profile/16698092880040039179noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-39193731978952613982014-06-17T01:04:33.637+05:302014-06-17T01:04:33.637+05:30Hi, maybe one of you that are working with this co...Hi, maybe one of you that are working with this could help. i'm using this camera with a fpga and I've seen links to the drivers (and got information out from them) but sincerely, copying all those registers and change the syntax is a bit hard (i'm programming in vhdl, not in c++ for arduino) and above all i want to understand what I'm doing.<br /><br />My problem, as a think was mentioned above, is the setting of the registers: I'm using ov5642 and managed to access the bank of registers, changing the value of some of them:<br /><br />register value<br />0x3017 0x7f<br />0x3018 0xfc<br /><br />The thing is that with this i manage to get VSYNC, HREF and PCLK signals, all of them for syncronizing but, on the other hand, i get no response on the data pins (the signals are quiet, like if the pins weren't enabled as outputs).<br /><br />I'm sure i'm missing some important register, so i'd be grateful if you Chinmay, or someone else who have had the same problem or known the solution, would tell me what is left or what i'm doing wrong.<br /><br />Thanks,<br /><br />FernandoAnonymoushttps://www.blogger.com/profile/16698092880040039179noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-30631848192680218232014-06-16T10:07:29.076+05:302014-06-16T10:07:29.076+05:30Hi Chinmay,
We obseved that in 8 bit mode OV5640 w...Hi Chinmay,<br />We obseved that in 8 bit mode OV5640 will output data from D9-D2. In our board the hardware connection with the host was wrong (It should have connected to D7-D0 but instead it was connected to D9-D2)<br /><br />The information regarding limitation in DVP interface with high PCLK from one of your replies to another query was helpful in debugging.<br /><br />ThanksAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-6925061712278498172014-05-17T15:38:27.612+05:302014-05-17T15:38:27.612+05:30OV5640's SC_PLL_CONTRL0 register (address 0x30...OV5640's SC_PLL_CONTRL0 register (address 0x3034), datasheet mentions as MIPI bit mode. Does it relate to DVP output. <br /><br />If it is in 8 bit mode which data pins will have data(D9-D2 or D7-D0).Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-4287269740058860602014-05-16T11:58:30.049+05:302014-05-16T11:58:30.049+05:30Register settings are same as you mentioned above....Register settings are same as you mentioned above.<br /><br />I measured D0-D9 from ov5640. <br /><br />I am able to read data but it is full noise and still am not getting data in D0-D1.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-53687427859411082852014-05-15T22:28:21.240+05:302014-05-15T22:28:21.240+05:30Check OV5640's SC_PLL_CONTRL0 register (addres...Check OV5640's SC_PLL_CONTRL0 register (address 0x3034). The lower nibble should read 0xA for 10-bit mode.<br /><br />Another possibility is that the buses are NOT perfectly aligned between the host chip and OV5640. Which D2-D9 pins are you measuring; are they the ones on the host chip? I have had instances where D0-D9 from OV5640 were connected to D2-D11 on the host chip.TheCodeArtisthttps://www.blogger.com/profile/11629092532561603507noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-80203410167741138332014-05-14T18:33:18.956+05:302014-05-14T18:33:18.956+05:30Hi, I am using OV5640. Driver is configured to us...Hi, I am using OV5640. Driver is configured to use 10 bit DVP. When I tested i found data is observed only in D9-D2. And not in D1-D0. Could you please tell me if it is a hardware issue or wrongly set register settings issue.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-48844832821855443602014-04-16T17:54:20.780+05:302014-04-16T17:54:20.780+05:30Not sure about this myself.
However, the table 8-...Not sure about this myself.<br /><br />However, the table 8-5 of the <a href="http://www.jmtsz.com/upLoad/down/month_1203/201203071210418594.pdf" rel="nofollow"><b>Ominivision OV5640 datasheet</b></a> containing the timing characteristics lists the maximum PCLK supported as 96Mhz with <b>additional restrictions</b>.<br /><br />As described in comment e alongside the table, it appears that high PCLK is supported for RAW@15fps. As we approach higher resolutions/speeds like 5M YUV@15fps (and above) the recommendation seems to be to go for MIPI interface and NOT use DVP.TheCodeArtisthttps://www.blogger.com/profile/11629092532561603507noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-15796159509382841422014-04-16T15:21:18.448+05:302014-04-16T15:21:18.448+05:30HI I am using ov5640 , for any resolution it works...HI I am using ov5640 , for any resolution it works fine for lower frame rate e.g. if my resolution is 720 p (raw YUV) it works fine till 25 fps , but when I try to increase my frame rate over 25 fps, the sensor stops giving pclk . For 25 fps , PCLK was coming around 75 MHz . For any resolution it works fine till the PCLK is in 75-80 MHz range? Any suggestions ? I am using DVP interface Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-63333596495566100942014-03-03T13:02:11.275+05:302014-03-03T13:02:11.275+05:30In JPEG mode, the compression-engine block of the ...In JPEG mode, the <b>compression-engine</b> block of the Omnivision sensor can be configured to compress the captured YUV image into a JPEG buffer. This is written to the on-chip FIFO (next stage following the ISP pipeline).<br /><br />Now the buffer read from the Omnivision chip on to the host is a JPEG image buffer which can <br />- be saved to file<br />OR<br />- uncompressed using a jpeg-decoder library/routine and displayed.<br /><br />Experiment with the various JPEG configuration registers (Tables 7-17, 7-18 & 7-19) of the <a href="www.jmtsz.com/upLoad/down/month_1203/201203071210418594.pdf" rel="nofollow"><b>Omnivision OV5640 Datasheet</b></a>.TheCodeArtisthttps://www.blogger.com/profile/11629092532561603507noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-38498496329207674182014-03-03T12:16:03.116+05:302014-03-03T12:16:03.116+05:30I am interfacing omnivision's (ov5640)image se...I am interfacing omnivision's (ov5640)image sensor with the FPGA and was able to capture raw frame in YUV422 format through the digital video port (DVP) parallel output interface.Now I am trying to capture the JPEG compressed output.The datasheet doesnot provide much detail of the JPEG mode and Since I have never studied JPEG mode I am unable to understand what the sensor will output in this mode(what bytes mean e.g. in raw yuv mode I knew the bytes coming are luma and chroma intensity values) and whether the sensor will output only the scan data or it will ouput all other necessary headers and info. that is required to make a complete JPEG file.I will be thankful for any help<br /><br />Regards<br />Az Ahmad<br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-33674487149209185752013-11-29T19:19:06.337+05:302013-11-29T19:19:06.337+05:30Hi Chinmay,
This is Azzy again. Back from a visit...Hi Chinmay,<br /><br />This is Azzy again. Back from a visit to the moon.<br /><br />After I last wrote to you. I looked at the problem ( cam interface) anew. It did not look like my usual MCS-52/AVR would do. After a bit of looking around I found the ARM processors, which seem quite ubiquitous and with the low cost availability of boards it seemed like an ARM processor was the way to go. <br />Unluckily no prior exposure to ARM. My search revealed the cancerous growth of Linux based software.<br />Anyways I decided to take the plunge and ordered a Cubieboard, a Beaglebone and two bare systems, one a board with an STM stm32f103rbt6 and a few support chips the other with a stm32f103zet6.<br /><br />I have managed to get the two stmf32.. boards under full control and can make them do tricks like (that guy with the monkey and the goat) but the Cubie and Beagle are still beyond my reach. I do realize the power of the Linux kernels the SS shells and other stuff but bare metal is closer to my heart. And am too old to learn new tricks. Perhaps the BB and QB will retire/relax in the cabinet.<br /><br />I recently built a high speed frequency agile front end with ’52 type processor (IP core, at the limit of what I could get out of it) and an AD9858 so there is no way to stop me from redoing it with the STM chip first. After that I will get into the camera. (Barring other distractions).<br /><br />So as things happen I will post them on your blog if you think that is OK. Hopefully it should be interesting.<br /><br />Azzy<br />azzythehillbillyhttps://www.blogger.com/profile/17525361880555704031noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-54229886781199129292013-11-11T11:19:11.562+05:302013-11-11T11:19:11.562+05:30Thanks for the timely reply and the above two link...Thanks for the timely reply and the above two links <br /><br />I studied the datasheet but unable to understand how to set the desired fps .Is there any specific formula that tells how the 6 registers associated with PLL (0x3034 ~ 0x3039) relates to the fps . I mean if my input clock(XVCLK) to the PLL module is lets say 25 MHz then to get the 30 fps what should be written in those 6 registers . Any example you can give will be greatly appreciated. <br /><br />Regards: LynchAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-87029681905967126212013-11-09T20:05:56.366+05:302013-11-09T20:05:56.366+05:30You can obtain a list of registers (and values) th...You can obtain a list of registers (and values) that need to be configured within existing drivers for ov5640 <b><a href="https://gitorious.org/omap4-v4l2-camera/omap4-v4l2-camera/source/cabfab980d196ab023a8b05cfadf871a3f34a15b:drivers/media/video/ov5640.c#L134" rel="nofollow">here</a></b> and <b><a href="https://android.googlesource.com/kernel/msm.git/+/77d02d8f25db4f6d5f0c4a3848098da36881d989/drivers/media/video/msm/ov5640.h" rel="nofollow">here</a></b><br /><br />(Note that both above links are from separate sources and may contain conflicting values/order. Feel free to experiment and choose what works best for you.)<br /><br />The arrays in the above drivers are address-value pairs. Entire arrays need to be written to the sensor module using i2c before turning on the sensor.<br /><br />The usual approach is to first write the init-array followed by the resolution, fps and img-format arrays. Next (optional) write any lens-correction, exposure, white-balance settings. Finally turn-on the streaming-bit of the camera.TheCodeArtisthttps://www.blogger.com/profile/11629092532561603507noreply@blogger.comtag:blogger.com,1999:blog-5879050571098780501.post-81095937542242091062013-11-09T17:57:32.109+05:302013-11-09T17:57:32.109+05:30I2c is working fine I just need the list that give...I2c is working fine I just need the list that gives the required registers to be configured for my case <br /><br />Regards: LynchAnonymousnoreply@blogger.com