About 43102399

2016-10-30

Posted on October 30, 2016 at 23:19Hello everybody, I've got a NTSC camera with decoder which delivers me 480x272 image data in 4:2:2 YCbCr format. NTSC has the characteristic to transmit every second line. First the odd frame 1, 3, 5, ..., 271 (480...

2016-10-28

Posted on October 28, 2016 at 15:26Hey, I have some trouble configuring my camera interface. I am using an analog NTSC camera with differential data lines. For decoding it into digital YCbCr 4:2:2 I am using the Intersil TW9990. I think I configured...

2016-10-03

Posted on October 03, 2016 at 12:39Hello, I am using the STM32F746 Discovery Board with STM32 System Workbench IDE. I know SDRAM is a volatile memory but I want copy a picture to the external SDRAM at startup because it's too big for the internal Fl...

2016-09-27

Posted on September 27, 2016 at 15:17Hey guys, I have a problem with defining a section for the external SDRAM on the STM32F746-Disco. I red many posts in different forums but I didn't find the way to a working code. I initialized the SDRAM in the S...

2016-11-02

Posted on November 02, 2016 at 13:55Hello, I red the manuals before. They don't help a lot. Also I tried to set up the DMA for double buffering mode manually. It works until I enable one of the interrupts. For example the transfer complete interrupt...

2016-10-29

Posted on October 29, 2016 at 19:14I found the issue guys... I didn't connect the +3.3 V digital supply voltage between the STM and TW9990. Only GND. I thought that I don't need it because the TW9990 is on a demo board with its own supply voltage.

2016-10-07

Posted on October 07, 2016 at 09:05I understand the differences in hardware but what are the differences in software? Why is it possible to store data in qspi flash at startup without using the internal flash (home_alarm example from st firmware) an...

2016-10-06

Posted on October 06, 2016 at 09:13Ok one last question for that. Is there a difference between the SDRAM and the QSPI? Because when I look at the demo program for the home_alarm of the st firmware I can see that they initialize the qspi chip in the...

2016-10-05

Posted on October 05, 2016 at 09:58Ok yes it's true. I made what the title of the thread says. But my goal was that the pictures are stored directly in the SDRAM at startup. Not in the flash first and then copied into the SDRAM. I know it's a volati...

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DCMI with DMA in Double Buffer Mode

Camera DCMI with DMA issues

Copy data to SDRAM at startup

Section for external SDRAM STM32F746 GCC

Re: DCMI with DMA in Double Buffer Mode

Re: Camera DCMI with DMA issues

Re: Copy data to SDRAM at startup

Re: Copy data to SDRAM at startup

Re: Copy data to SDRAM at startup