About mthanh2602

mthanh2602 · 2019-01-09

Hello everyone.I want to use only CPU to read and process VGA image with YUV format from camera. It's mean we have 640*480*2 = 600kbytes each frame and this is more than the 500 kbytes memory of CPU that I use. (I want to transfer directly data from ...

mthanh2602 · 2018-12-02

Hello, sorry for posting this post again. I have a problem with my code. I'm trying to write a program to take picture from camera and save it as motion jpeg video (MJPEG) in to USB. I build already the header and the structure of MJPEG file but it's...

mthanh2602 · 2018-11-29

Hello everyone.I have a problem with my code. I'm trying to write a program to take picture from camera and save it as motion jpeg video (MJPEG) in to USB, using JPEG encoder. I build already the header and the structure of MJPEG file but it had prob...

mthanh2602 · 2018-11-28

Hello everyone,I have a problem with my code. I'm trying to write a program to take picture from camera and save it as motion jpeg video (MJPEG) in to USB. I build already the header and the structure of MJPEG file but it's really weird when I try to...

mthanh2602 · 2018-10-08

Hello everyone.Sorry for post this question again. But I really need some help.I am trying to write a program can take picture from camera and save it into SD card when I press a button.I had finish this, but it had one problem. I don't know why but ...

mthanh2602 · 2019-01-10

Hi JW. Thanks for your comment.I had tried by configure the window size but It just efficient after whole data transfered from DCMI to CPU. So I think configure window with small size does not mean transfer data is smaller. Then I reduce the length d...

mthanh2602 · 2018-12-05

Yes, I'm writing data to USB. 1 VGA frame around 1.5kbyte.But good news is I had fixed my problem. The max define buffer of f_write is 512. It's okay when I increase this value to 1024 but not effective with 2048 and 4096. So I divided a big data i w...

mthanh2602 · 2018-12-02

Hi Clive. Many thanks for your reply.Maybe it was closed because I posted the same thing again. Have person told me that this mistake is "3 bytes were dropped", do you have any ideal about this?I created one data with 5754 bytes and write it 50 time...

mthanh2602 · 2018-10-09

Dear Clive Two.Zero. Many thank for your answer.It's hard a bit for a newbie like me to understand what you said. I'll research about it.

mthanh2602 · 2018-10-09

Thanks Avatar. I really appreciate your help.I had set dma stream1 for DCMI to highest priority. But it's still stop. But I have some confusing about what is interrupt? Are these below an interrupt?--> void JPEG_IRQHandler(void)--> void DMA2_Stream...

User statistics

User Activity

Is it possible using DMA to read the second half data from DCMI.

f_write dropped 3 bytes

Problem with MJPEG output data (STM32F769)

Issue with f_write function (STM32F769I EVAL)

STM32F769I EVAL: Why camera stop streaming when creating a JPEG file into SD card?

Re: Is it possible using DMA to read the second half data from DCMI.

Re: Problem with MJPEG output data (STM32F769)

Re: Problem with MJPEG output data (STM32F769)

Re: STM32F769I EVAL: Why camera stop streaming when creating a JPEG file into SD card?

Re: STM32F769I EVAL: Why camera stop streaming when creating a JPEG file into SD card?