About Sprat.1

Sprat.1 · 2020-05-04

I have an OV7670 interfaced to a nucleo board. Frame rate=10fpsImage format= qcif(174X144) ; YUV422(monochrome only)Pixel clock =8MhzSuccessive bytes of a row(Line) ,arrive at the rate of 8M bytes/sec, which is too high to directly transfer the incom...

Sprat.1 · 2020-04-28

Hi, any reply is greatly appreciated. I intend to interface ov7670 with my nucleo board for a qvga with yuv422. To get 30 frames per second ,the pclk must be set to 24Mhz(according to the data sheet). What this means is that each byte is received fro...

Sprat.1 · 2020-05-04

"Why would it do so? The UART will only transmit what you tell it to, otherwise it will be idle".Apologies for not mentioning earlier, I have the following plan in mindstep 1.ARM samples the arriving bytes from camera and places them into the buffer(...

Sprat.1 · 2020-05-04

@Piranha ,@TDK please consider the below scenario(which is the reason i ask this question) From the timing diagrams,the camera doesn't spit out rows of an image in quick succession ie, there is time gap b/w the arrival of different row...

Sprat.1 · 2020-05-04

"The UART stream is continuous (start bit immediately after stop bit) as long as you feed bytes to the UART in time"@TDK ,yes, the uart stream is continuous as long as you are able to feed bytes to the uart in time.

Sprat.1 · 2020-05-04

"By the way, because of start and stop bits in USART protocol, from 10 bits on a line only 8 are data bits. Therefore one frame will take 83,52 ms."@Piranha Yes, I did not include time taken to transmit control bits in each USART frame, thank you fo...

Sprat.1 · 2020-04-28

> There is no reason your incoming data clock needs to match the outgoing data clockBut if the rate at which bytes of a line arrive on the parallel interface is higher that the Uart transmission rate, this will again cause overruns(which should not b...

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If UART buad rate < Data rate from camera,there will be data losses, but Is it a problem if UART baud rate >data rate from camera?

Uart baud rate never seems to be enough to transmit the 30fps received from ov7670

Re: If UART buad rate < Data rate from camera,there will be data losses, but Is it a problem if UART baud rate >data rate from camera?

Re: If UART buad rate < Data rate from camera,there will be data losses, but Is it a problem if UART baud rate >data rate from camera?

Re: If UART buad rate < Data rate from camera,there will be data losses, but Is it a problem if UART baud rate >data rate from camera?

Re: If UART buad rate < Data rate from camera,there will be data losses, but Is it a problem if UART baud rate >data rate from camera?

Re: Uart baud rate never seems to be enough to transmit the 30fps received from ov7670