Waterfall work at slow speeds

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Diskussions- und Newsboard des DARC-Ortsverbandes I40 | allgemeine Kategorie | UHSDR Firmware (Moderators: DF8OE, DL1PQ) | Topic: Waterfall work at slow speeds

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Topic: Waterfall work at slow speeds (Read 2015 times)

SP3OSJ
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Waterfall work at slow speeds
« on: 19. April 2018, 15:10:25 »

« Last Edit: 29. June 2022, 21:07:28 by SP3OSJ »

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DF8OE
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Stellvertr. OVV I40, Jugend / Nachwuchsreferent

Re:Waterfall work at slow speeds
« Reply #1 on: 19. April 2018, 15:42:23 »

Hi Artur,

you compare apples with pears. We do have magnification routines in new firmware which are based on a complete different data structure than old firmware. And you can set speed of waterfall and scope independent on new firmware to save horse power. We need much more horse power for audio interrupt (DSP functions) so transfer time to LCD must be minimized as much as possible. SPI would be too slow and you would get audio distortions because there is too much time wasted with LCD data transfer in SPI. At low speeds of course you see the "stepping" when new dataset arrives. If we would "smooth" that there will again be a big data traffic. Slowing down LCD should result in LOWER transfer of data - it makes no sense to lower the speed and stuck transferred data at the same level. So look at new LCD and be happy

vy 73
Andreas

« Last Edit: 19. April 2018, 15:44:50 by DF8OE »

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SP9BSL
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Re:Waterfall work at slow speeds
« Reply #2 on: 20. April 2018, 09:45:36 »

The stepping of waterfall at low speed is because of lack of ram and thereof we use display of two or three lines per one line of data recorded from spectrum. Have idea how to make it smooth. Will try it next week.

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73 Slawek

SP9BSL
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alter Hase

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Re:Waterfall work at slow speeds
« Reply #3 on: 07. May 2018, 11:54:30 »

Corrected display routine waits for merge. After that, please test it. For me it looks much better now.

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73 Slawek

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