Some more DCMI problems F207IG

[stbbrad3]

Posted on January 09, 2012 at 16:30

Hello everyone,

A couple months back I was having some issues with DCMI that were mostly solved with some help here at the forums. You can see the pevious thread [DEAD LINK /public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/DCMI Issues, looking for insight&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&TopicsView=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/AllItems.aspx?Paged%3DTRUE%26p_StickyPost%3D%26p_DiscussionLastUpdated%3D20111212%252010%253a46%253a14%26p_ID%3D19852%26View%3D%257bF47A9ED8%252dE726%252d42BE%252dACED%252d732F13B66581%257d%26FolderCTID%3D0x012001%26PageFirstRow%3D121&currentviews=590]here. I am now attempting to get high resolution images working. I have a new board in with direct connections of the data, sync, and clock lines from the MT9v024 sensor ( previously through LVDS ). I have no problem capturing low resolution images which has the pixel clock binned by 4 from 14MHz to 3.5MHz. When I try to bin by 2 or without any binning at all I cannot see the end of frame get set. I am clocking the HCLK up from 32MHz to 120MHz, as well as maxing out the peripheral clocks, to capture the image ( even when binning by 4 ). Has anyone else ran across this type of issue, or have any idea why I would not be seeing end of frame with a faster pixel clock. From my understanding 14MHz should be well within range of the DCMI processing, escpecially with the MCU clocked up to 120MHz. Any response would be appreciated. Thanks, Brad #dcmi

[chtatasever]

Posted on January 17, 2013 at 20:38

[amin23]

Posted on January 18, 2013 at 10:06

The following example may help you: STM32F2 and STM32F4 demonstration builder platform:

http://www.st.com/internet/mcu/product/252134.jsp

[nakulrao]

Posted on January 18, 2013 at 19:14

I have been attempting to interface the MT9D111 with the STM32F4, but to no avail. It just doesn't respond to I2C start at all. I have hooked it up to the oscilloscope and can see the correct device address being transmitted. the camera is supposed to give an acknowledgement. But it never happens.

Any ideas on what I should be doing...