LED矩阵动画延迟

这是62.5Hz，应该能很好地工作。我认为比30Hz快的任何东西都应该看起来不错。是的，我建议你为延迟来计数帧，这比延迟环更精确。我不明白你所说的“当模式移动时非常闪烁的东西”是什么意思。是好还是坏？如果你想避免伪像，可以实现两个帧缓冲器，并交替显示和编辑哪一个。这意味着在下一个完整的帧被显示之前，任何改变都不会影响输出。（也可能在SWA之后很快完成动画。PS缓冲区以确保在下一次交换之前完成所有这些操作。



      以下为原文

   
That's 62.5Hz, which should work well.
I think anything quicker than 30Hz should look ok.
 

Yes, I recommend you count frames for your delays, that would be more accurate than delay loops.
 
I don't understand what you mean by "very little flicker thing when the patterns moving".
Is that good or bad?
If you want to avoid artifacts, it could be an idea to implement two frame buffers, and alternate which one you are displaying and editing.
That would mean that any changes wouldn't affect the output until the next complete frame is displayed.
(You may also have to do your animation soon after it swaps buffers to make sure you do it all before the next swap.)

精彩建议双缓冲的东西。你明白了我的意思。如果我做动画，让我把一个像素从右向左移动，我看到两个像素在移动。*它可能是移位延迟太高（对于缓慢的延迟没有问题）。*可能是ISR显示，而我是半个标记的移位循环。*可能是DE。Read不与显示刷新率等同步。对于静态图像，这不会发生，只有快速移动时才会发生。它不是重像。我不知道这个意思：（这是件坏事。我需要平稳地转移。



      以下为原文

   


Wonderful suggestion the double buffer thing. You got it what I mean.If I do an animation, let say I move a single pixel from right to left, I see two pixels while moving.
 
 
*It might be the shifting delay is too high (for slow delays there is no problem).
*It may be the ISR displaying while I'm half way mark in the shifting loop.
*It may be the delay is not synchronized with the display refresh rate etc...
*For still images this won't happen & it happens only when shifting speedily.
 
Its not ghosting. I don't know the meaning Artifact :(
 
Its a bad thing.I need to shift smoothly.

这是我的猜测。



      以下为原文

   
This would be my guess.
 

我通过分配另一个64字节RAM位置来实现双缓冲区。现在我有两个缓冲器，一个是工作缓冲器，另一个是显示缓冲器。更新每个帧的显示缓冲区结束。这是1ms中断x 16行＝16ms。所以对于每一帧，我更新我的显示缓冲器。测试结果，如果我移动一个像素@ 16ms速率。它的速度太快，我看不到有多少个LED移动。如果我移动一个像素@ 32毫秒速率（2帧速率），我看到两个LED轻微移动。如果我移动一个像素@ 48毫秒速率（3帧速率），我看到三个LED轻微移动。如果我移动一个像素@ 64毫秒速率（4帧速率），我看到四个LED移动SLY。只有移动时才会发生这种情况。如果我使用了一个缓冲区，那么上面的情况会发生什么？在动画延迟结束后更新显示缓冲区怎么样？这意味着，如果我想要一个动画延迟为64毫秒（4帧），我不会更新显示缓冲区直到4帧超过。



      以下为原文

    I implemented a double buffer by assigning another 64bytes RAM locations.
Now I have two buffers one is working buffer & the other is display buffer.
 
I update my display buffer end of the each frame. That is 1mS interrupt X 16 rows = 16mS.
So for every single frame I update my display buffer.
 
Tested results,
 
If I move a single pixel @ 16mS rate. It’s too speed I cannot see how many LEDs moving.
If I move a single pixel @ 32mS rate (2frames rate) I see two leds moving slightly.
If I move a single pixel @ 48mS rate (3frames rate) I see three leds moving slightly.
If I move a single pixel @ 64mS rate (4frames rate) I see four leds moving slightly.
 
This happens only when moving. The above happens if I used a single buffer as well.
 
What about updating the display buffer after expiring the animation delay?
That means If I want an animation delay of 64mS (4 frames) I won’t update display buffer until 4frames exceed.
 
Is that method ok instead of a fixed single frame display update?

我们能看到你的代码吗？现在你是双缓冲，我怀疑这是你的代码中的一个bug，如果你能看到两个LED。



      以下为原文

    Can we see your code?
Now you're double buffering, I suspect it's a bug in your code if you can see two LEDs on.
 

在这里，我完全确定这不是一个代码问题，但这是我多年来错过的一个时机。



      以下为原文

    Here it is.I'm completely sure it is not a code issue but its a timing thing which I was missing over the years :(
 
;OSC = 4MHz
;Interrupt rate = 250 X 4 = 1mS
;Frame Time = 1mS X 16 = 16mS
ISR_Mux bcf PIR1,TMR2IF ; clear TMR2 interrupt flag bit
   movlw .29
         movwf Col_Counter
         bsf STATUS,IRP ; point to display buffer (bank3)
         movlw 68h
         movwf FSR
         ;
         incf Row,F
         bcf Row,4
         movf Row,W
         addwf PCL,F
         goto Do_Row_1
         goto Do_Row_2
         goto Do_Row_3
         goto Do_Row_4
         goto Do_Row_5
         goto Do_Row_6
         goto Do_Row_7
         goto Do_Row_8
         goto Do_Row_9
         goto Do_Row_10
         goto Do_Row_11
         goto Do_Row_12
         goto Do_Row_13
         goto Do_Row_14
         goto Do_Row_15
         goto Do_Row_16
 
Do_Row_1 movlw .2
Feed_Row_1 bcf SR_Data
        btfsc INDF,0
        bsf SR_Data
        bsf SR_Clock
        bcf SR_Clock
        subwf FSR,F
        decfsz Col_Counter,F
        goto Feed_Row_1
        bsf PORTC,1 ; turn off 595 (turn off display)
        bsf PORTC,6 ; disable previous Row
        bcf PORTA,0 ; enable new Row
   goto DO_Make_Latch
   
Do_Row_2 ---

Do_Row_3 ---

Do_Row_4 ---
   
Do_Row_16 movlw .2
   incf FSR,F
Feed_Row_16 bcf SR_Data
   btfsc INDF,7
        bsf SR_Data
        bsf SR_Clock
        bcf SR_Clock
        subwf FSR,F
        decfsz Col_Counter,F
        goto Feed_Row_16
        bsf PORTC,1 ; turn off 595 (turn off display)
        bsf PORTC,7 ; disable previous Row
        bcf PORTC,6 ; enable new Row
   ;
   bsf Flag_Register,End_Frame
;copy working buffer to display buffer @ end of frame (16mS)
Copy_Buffer bcf STATUS,IRP ; point to working buffer on (Bank0)
   movlw 30h
                movwf FSR
                 movlw .29
                 movwf Counter
                ;
Copy_Loop movf INDF,W
                 bsf STATUS,IRP
                 movwf INDF
                 bcf STATUS,IRP
                 incf FSR,F
                 movf INDF,W
                 bsf STATUS,IRP
                 movwf INDF
                 bcf STATUS,IRP
                 incf FSR,F
                 decfsz Counter,F
                 goto Copy_Loop
                 ;
DO_Make_Latch nop
   nop
   nop
   nop
   bsf SR_Latch ; LATCH low to high transition
   nop ; tied both SR Latches
   bcf SR_Latch ; //
   bcf PORTC,1
         bcf STATUS,IRP ;point to working buffer
         
ISR_Exit ---
       
     
;==========================================================
Main_Loop movlw .7
        movwf Shift_Count
Shift_Init movlw b'00000001' ; load a pixel to working buffers
   movwf 30h
   movwf 32h
   movwf 34h
   movwf 36h
   movwf 38h
   movwf 3Ah
        ;
Shift_Loop bcf STATUS,C
        rlf 30h,F
        rlf 32h,F
        rlf 34h,F
        rlf 36h,F
        rlf 38h,F
        rlf 3Ah,F
        bsf PCLATH,3
        call Delay_64mS
        bcf PCLATH,3
        decfsz Shift_Count,F
        goto Shift_Loop
        movlw .7
        movwf Shift_Count
        goto Shift_Init
;---------------------------------------------------------
   org 0x0B00
     
Delay_64mS movlw .4
    movwf Del_Count ; 4 X 16mS = 64mS
        bcf Flag_Register,End_Frame
Del_Loop btfss Flag_Register,End_Frame
        goto $-1
        bcf Flag_Register,End_Frame
        decfsz Del_Count,F
        goto Del_Loop
        return

这是相当困难的，当你不张贴整个事情，并没有真正记录你所遗漏。



      以下为原文

    that's fairly hard to follow when you don't post the whole thing and don't really document what you've left out.