Image insertion, flickering and blinking

[tobozo]

hey 😄

I got your shoutout on twitter all right and I suggest you try this code

[Mystereon]

Amazing . I'm keen for this to become more than just a ship viewer . Thank you for helping me out. I feel quite honoured :)

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On Fri, 1 Nov 2019, 17:33 tobozo, ***@***.***> wrote: hey 😄 I got your shoutout <https://twitter.com/Mystereon/status/1190243821822578691?s=20> on twitter all right and I suggest you try this code <https://github.com/tobozo/M5ELite> — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1?email_source=notifications&email_token=AEZMCP7ROGQ43DZCHLBQUG3QRRR7JA5CNFSM4JH52YFKYY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4HWFLK5Q>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEZMCP5JA3OF4C7BJARE6ODQRRR7JANCNFSM4JH52YFA> .

[Mystereon]

It has slowed down quite

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On Fri, 1 Nov 2019, 21:42 Ian Parker, ***@***.***> wrote: Amazing . I'm keen for this to become more than just a ship viewer . Thank you for helping me out. I feel quite honoured :) On Fri, 1 Nov 2019, 17:33 tobozo, ***@***.***> wrote: > hey 😄 > > I got your shoutout > <https://twitter.com/Mystereon/status/1190243821822578691?s=20> on > twitter all right and I suggest you try this code > <https://github.com/tobozo/M5ELite> > > — > You are receiving this because you are subscribed to this thread. > Reply to this email directly, view it on GitHub > <#1?email_source=notifications&email_token=AEZMCP7ROGQ43DZCHLBQUG3QRRR7JA5CNFSM4JH52YFKYY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4HWFLK5Q>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/AEZMCP5JA3OF4C7BJARE6ODQRRR7JANCNFSM4JH52YFA> > . >

[tobozo]

Actually it feels faster when compiled with the M5Stack-Core-ESP32 board or any ESP32 board with psram disabled,

The cause is that TFT_eSprite will allocate the sprite memory to the psram when available, even when it's not necessary.

Since the psram uses the SPI bus, that's a slowdown indeed.

One speed improvement is to disable psram, your project does not need much memory since it's already got plenty free (~180K);

Another improvement would be by using DMA transfer but that's out of my league (see these examples).

[Mystereon]

That all makes sense dude .. I looked at the DMA routines and yeah ..that looks like a brain freezer

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On Fri, 1 Nov 2019, 22:56 tobozo, ***@***.***> wrote: Actually it feels faster when compiled with the *M5Stack-Core-ESP32* board or any ESP32 board with psram disabled, The cause is that TFT_eSprite will allocate the sprite memory to the psram when available, even when it's not necessary <https://github.com/m5stack/M5Stack/blob/master/src/utility/Sprite.cpp#L109> . Since the psram uses the SPI bus, that's a slowdown indeed. One speed improvement is to disable psram, your project does not need much memory since it's already got plenty free (~180K); Another improvement would be by using DMA transfer but that's out of my league (see these examples <https://github.com/lovyan03/ESP32_DmaSamples> ). — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1?email_source=notifications&email_token=AEZMCP6SWLNXZWA3I7B4BYLQRSXY7A5CNFSM4JH52YFKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEC4LV3A#issuecomment-548977388>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEZMCP4H3R2HAUNULA7E2JTQRSXY7ANCNFSM4JH52YFA> .