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???
02/15/05 13:44
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 		 #87509 - if it is really slow
Responding to: ???'s previous message
How would I know the bottle nick of the design, is it the program that is too slow or is it the LCD because program waits of LCD_BUSY signal to disappear?
If the busy times are significant making the busy loop control the gate of a timer can give useful information. This only gives relevant data if the wait for unbusy is more than a few cycles. Another method would be
Save This Code
while (TheBit)
{ // panel is busy
  WaitTimeAccumultor++
}

Both these methods will give somewhat false readings (the "get out of busy wait" will be a bit longer) but still give a reasonable estimate.

Erik


List of 42 messages in thread
TopicAuthorDate
GLCD Project (low frequency scope)            01/01/70 00:00      
   GLCD Scrolling            01/01/70 00:00      
      Lesson learned            01/01/70 00:00      
         did you check            01/01/70 00:00      
   hi Speed GLCD displays?            01/01/70 00:00      
      Probably            01/01/70 00:00      
      Hardware scroll            01/01/70 00:00      
         PaceSetter            01/01/70 00:00      
      Best Display >> None is perfect            01/01/70 00:00      
         Sweep mode            01/01/70 00:00      
            Scope Squares            01/01/70 00:00      
            8 Bits Update            01/01/70 00:00      
               like rotate it 90°?            01/01/70 00:00      
                  90° Rotation Indeed            01/01/70 00:00      
   One step further            01/01/70 00:00      
      Animation            01/01/70 00:00      
         scan too slow!!            01/01/70 00:00      
            15 seconds? !!!            01/01/70 00:00      
               or....            01/01/70 00:00      
               slightly more            01/01/70 00:00      
               Optimization            01/01/70 00:00      
                  calculation            01/01/70 00:00      
                     Will have a look            01/01/70 00:00      
                        assembler speedup            01/01/70 00:00      
                  if it is really slow            01/01/70 00:00      
                     too smart Man            01/01/70 00:00      
                        another way            01/01/70 00:00      
                  When do you wait?            01/01/70 00:00      
                     first choice            01/01/70 00:00      
               should I use Serial RAM for buffer?            01/01/70 00:00      
                  serial RAM and time            01/01/70 00:00      
                     lcd_not_busy();            01/01/70 00:00      
                        a much faster approach            01/01/70 00:00      
                           I don't have enough XRAM            01/01/70 00:00      
                              magic            01/01/70 00:00      
                              more tweaking            01/01/70 00:00      
                                 Good thinking Jan            01/01/70 00:00      
                                    tweaking II.            01/01/70 00:00      
                                       Magic Tweeking            01/01/70 00:00      
                  Serial RAM is useless            01/01/70 00:00      
   maybe this technique will work here            01/01/70 00:00      
      Multi-microcontrollers            01/01/70 00:00      

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