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stanleyella

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Joined: 25/06/2022
Location: United Kingdom
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Posted: 07:25pm 24 Jun 2023

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A new thread ok, when I got code to show. Your idea is valid but not for beginners..
Hope you sort it and share. take care Tom, stan, usually off piste

Mixtel90

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Joined: 05/10/2019
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Posted: 07:36pm 24 Jun 2023

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Does CLS work on the framebuffer or always on the main display?

Mick

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matherp
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Posted: 08:16pm 24 Jun 2023

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What happens to f in the loop and therefore why is n always blank?

thwill

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Joined: 16/09/2019
Location: United Kingdom
Posts: 4043

Posted: 10:01pm 24 Jun 2023

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matherp said What happens to f in the loop and therefore why is n always blank?

Am I having a senior moment, I still don't see it:

FRAMEBUFFER Create
' N is blank, F is blank

FRAMEBUFFER Write F
Text 50, 50, "Hello World"
' N is blank, F contains "Hello World"

FRAMEBUFFER Copy F, N
' N and F contain "Hello World"
' i.e. "Hello World" appears on the display
Pause 2000

Do
' N and F contain "Hello World", L does not exist

FRAMEBUFFER Layer
' N and F contain "Hello World", L is blank

FRAMEBUFFER Copy F, L
' N, F and L all contain "Hello World"

CLS
' N and L contain "Hello World", F is blank

FRAMEBUFFER Copy F, N
' N and F are blank, L contains "Hello World"
' i.e. "Hello World" disappears from the display
Pause 2000

FRAMEBUFFER Copy L, F
' N is blank, F and L contain "Hello World"

FRAMEBUFFER Copy F, N
' N, F and L all contain "Hello World"
' i.e. "Hello World" reappears on the display.
Pause 2000

FRAMEBUFFER CLOSE L
' N and F contain "Hello World", L does not exist (same as first time through loop)
Loop

State is the same at the beginning and end of the loop, so "Hello World" should disappear and then reappear every time we go through the loop shouldn't it ?

Note that as I understand it the difference between the behaviour of F and L never manifests because we never copy L to N.

Best wishes,

Tom

Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

Mixtel90

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Posts: 6798

Posted: 06:18am 25 Jun 2023

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I thought so too...

' Write Hello World to "F" and copy to the display N F L.
1 FRAMEBUFFER Write F _ _ x
2 Text 50, 50, "Hello World" _ HW x
3 FRAMEBUFFER Copy F, N HW HW x
' *** Display should now show "Hello World"
4 Pause 2000 HW HW x

5 Do

' Create "L" and copy "F" to "L"
6 FRAMEBUFFER Layer HW HW _
7 FRAMEBUFFER Copy F, L HW HW HW

' Clear "F" and copy to the display.
8 CLS HW _ HW
9 FRAMEBUFFER Copy F, N _ _ HW
' *** Display should now be blank.
10 Pause 2000 _ _ HW

' Copy "L" to "F" and then "F" to display.
11 FRAMEBUFFER Copy L, F _ HW HW
12 FRAMEBUFFER Copy F, N HW HW HW
' *** Display should now show "Hello World"
13 Pause 2000 HW HW HW

' Close "L"
14 FRAMEBUFFER CLOSE L HW HW x

15 Loop

Edited 2023-06-25 16:22 by Mixtel90

Mick

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matherp
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Posts: 9129

Posted: 07:22am 25 Jun 2023

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The second statement in the loop copies f to l. But from the second time round the loop f is blank because of the CLS

thwill

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Posts: 4043

Posted: 07:45am 25 Jun 2023

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matherp said The second statement in the loop copies f to l. But from the second time round the loop f is blank because of the CLS

Except after the CLS, line 11, as per Mixtel90's numbering, copies L (Hello World) to F so it is not blank the second time around the loop

.

Best wishes,

Tom
Edited 2023-06-25 17:50 by thwill

Game*Mite, CMM2 Welcome Tape, Creaky old text adventures

thwill

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Posted: 09:36am 29 Jun 2023

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Hi Peter,

I'm still hoping for an explanation I can understand

.

In the meantime is this supposed to work ?

PicoMite MMBasic Version 5.07.07
Copyright 2011-2023 Geoff Graham
Copyright 2016-2023 Peter Mather

> option list
PicoMite MMBasic Version 5.07.07
OPTION SYSTEM SPI GP6,GP3,GP4
OPTION CPUSPEED (KHz) 252000
OPTION LCDPANEL ILI9341, RLANDSCAPE,GP2,GP1,GP0
OPTION GUI CONTROLS 2
OPTION TOUCH GP5,GP7
GUI CALIBRATE 0, 4034, 2040, -2600000, -64285 <== Ignore, broken touch
OPTION SDCARD GP22
OPTION AUDIO GP20,GP21, ON PWM CHANNEL 2

> FrameBuffer Create
> FrameBuffer Copy N, F
Error: Invalid address - resetting
PicoMite MMBasic Version 5.07.07
Copyright 2011-2023 Geoff Graham
Copyright 2016-2023 Peter Mather

Best wishes,

Tom
Edited 2023-06-29 19:37 by thwill

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Martin H.

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Joined: 04/06/2022
Location: Germany
Posts: 1114

Posted: 11:25am 29 Jun 2023

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thwill said

> FrameBuffer Create
> FrameBuffer Copy N, F
Error: Invalid address - resetting
PicoMite MMBasic Version 5.07.07
Copyright 2011-2023 Geoff Graham
Copyright 2016-2023 Peter Mather

Best wishes,

Tom

As I see, you try to copy from a non existend Buffer (N)
There is no reserved screenmemory in a non VGA Picomite.

just my 2 cents

'no comment

Mixtel90

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Posted: 11:41am 29 Jun 2023

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The FRAMEBUFFER commands work in 5.07.07 for both versions now (for LCD panels it's only SPI colour, I think).

I really must print out a new manual. A lot has happened since 5.07.03...

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

thwill

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Posts: 4043

Posted: 11:47am 29 Jun 2023

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Martin H. said As I see, you try to copy from a non existent Buffer (N)
There is no reserved screenmemory in a non VGA Picomite.

Ah, perhaps that's it; in which case there should be a proper ERROR.

However I thought Peter had indicated this was possible for a MISO enabled display where N would refer to the actual display and copying from it to the C or L framebuffers was supported ... though the colours would obviously be converted to 4-bit in the process, so not the fastest operation.

Is this not the case ?

Best wishes,

Tom
Edited 2023-06-29 21:48 by thwill

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matherp
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Posts: 9129

Posted: 11:49am 29 Jun 2023

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It's a bug (typo). Will post a fix when I've finalised the changes in PIO DMA

ice2642

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Joined: 27/05/2023
Location: Brazil
Posts: 82

Posted: 12:45pm 29 Jun 2023

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I am using here PicoMite VGA, and the framebuffer is working well, but I do not know if it is possible to create more layers.

[code]
CLS
FRAMEBUFFER create
FRAMEBUFFER layer
Dim float vertices(2,7)=(-1,1,-1, 1,1,-1, 1,-1,-1, -1,-1,-1, -1,1,1, 1,1,1, 1,-1,1, -1,-1,1)
Dim integer facecount(5)=(4,4,4,4,4,4)
Dim integer faces(23)=(0,1,2,3, 1,5,6,2, 0,4,5,1, 5,4,7,6, 2,6,7,3, 0,3,7,4)
Dim integer colours(6)=(RGB(red),RGB(green),RGB(red), RGB(blue), RGB(red), RGB(yellow), RGB(cyan))
Dim integer edge(5)=(6,6,6,6,6,6)
Dim integer fill(5)=(0,1,2,3,4,5)
Dim n=1,nv=8,nf=6,camera=1
Dim zz =1, zy=1,zx=1
Math scale vertices(),100.0,vertices()

Draw3D create n,nv,nf,camera,vertices(),facecount(),faces(),colours(),edge(),fill()

Dim integer viewplane=400
Draw3D CAMERA n,viewplane

Dim integer x=0,y=0,z=900

MODE 2,4
Font 3
FRAMEBUFFER write l
Draw3D show n,x,y,z

Dim float yaw=Rad(1),pitch=Rad(2),roll=Rad(0.5)
Dim float q(4)

Dim escala(5)=(132,148,165,175,198,247)

Do
FRAMEBUFFER copy l,n
Math q_euler yaw,pitch,roll,q()
Draw3D rotate q(),n
Draw3D show n,x,y,z
Inc yaw, Rad(1)
Inc pich, Rad(2)
Inc roll, Rad(0.5)
Pause 1.3
x=x+zz
y=y+zy
z=z+zx
nota=nota+1
If nota> 5 Then nota = 1
Play tone escala(nota),0,100
Print @(10,10) " Marcio Esper 2023"
If x > 270 Then zz = -1
If x < -270 Then zz = 1
If y > 110 Then zy=-1
If y < -140 Then zy =1
If z >3290 Then zx =-2
If z < 600 Then zx =1
Loop
[/code]

Best regards,

MMBasic 5.0707 on PicoMite VGA

thwill

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Posts: 4043

Posted: 12:51pm 29 Jun 2023

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ice2642 said I am using here PicoMite VGA, and the framebuffer is working well, but I do not know if it is possible to create more layers.

As I understand it:

On the PicoMiteVGA:

Every framebuffer costs you 37.5K of RAM hence there only being at most 3: N (always exists and is what is actually displayed on the VGA screen, but doesn't come from variable memory), C and L.

On the standard PicoMite:

Also has up to 3 buffers, but N does not refer to a RAM framebuffer it refers to the buffer/memory of the display hardware itself, e.g. ILI9341. If the display hardware doesn't support MISO (i.e. you can't blit from it) then you can copy to N, but you can't copy from N - the "bug" is that copying from N isn't currently working in a case where it should be.

Best wishes,

Tom
Edited 2023-06-29 23:05 by thwill

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