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Jeff Corr
09/04/05 08:49
Read: 729 times


 
#100571 - system im using
Responding to: Jan Waclawek's previous message
Yes that Dallas 8051 is pretty fast. With just the software PWM loop running, the output to both motors is around 15Khz.

From Andy's last post it was clearing up a few things in my head as to what happens in the INT, and I'm seeing now that I can't simply expect to grab all three bytes in one INT jump.

I was thinking that I'll need some type of way to grab one byte and return from the INT, and on the next call, grab the next byte to the next register.

On another note, I've never really had any problems using registers for my programs because I remember and notate what each one is to be used for, however I'm used to looking at R1-R7 as regular variable space, I suppose a bad habit to get into down the road. How do you guys do it? Assuming the Dallas 8051 I use starts with direct RAM at &20h, can I simply use MOV &20H, data to store a byte there? Sorry, never did it that way before :-)

I thought I would show you all what I've done.
http://www.geocities.com/adempha/ss.jpg < screenshot of the app used to control this (hopefully soon anyway) Box with green lines shows the current image which would be displayed with the laser. Thats the standard laser test pattern everyone uses.
http://www.geocities.com/adempha/projector.jpg < Closeup of the laser module, two motors with mirrors.
http://www.geocities.com/adempha/system.jpg < Complete system showing the 8051 board as well as projector. I added a fan over the voltage regulator to cool it because after the motors and laser module were connected it started to get relatively hot. Two chips on the left are a Max 233 and a 74241 for interfacing the serial port to the 8051. The chip above the 8051 is an 8 channel serial ADC, which you guys will never believe, but I wrote some code for it and it worked on the very first try using a "bit banging" method. Like I said in an earlier post, this board was to eventually be used for a robot I was building.


List of 85 messages in thread
TopicAuthorDate
Laser system serial port com      Jeff Corr      09/02/05 01:25      
   MHz?      Oliver Sedlacek      09/02/05 01:32      
      11.059      Jeff Corr      09/02/05 01:54      
         also...      Jeff Corr      09/02/05 01:55      
   Even more... anybody got any ideas?      Jeff Corr      09/02/05 02:30      
      Values in      Anders Sandström      09/02/05 02:58      
   text???      Jan Waclawek      09/02/05 03:14      
      thanks so far      Jeff Corr      09/02/05 05:29      
         Back to basics      Andy Neil      09/02/05 05:53      
         Oh, come on...      Andy Neil      09/02/05 06:45      
      "Program" or "Code?"      Andy Neil      09/02/05 11:01      
   Oh dear...      Andy Neil      09/02/05 03:57      
   Fundamental Comms Problem      Andy Neil      09/02/05 04:05      
   Serial Code - Doomed!      Andy Neil      09/02/05 04:23      
      this is getting ridiculous      Erik Malund      09/02/05 06:13      
         learning process      Jan Waclawek      09/02/05 06:21      
            oh well      Erik Malund      09/02/05 06:54      
               agreed - waiting for the real stuff :-)      Jan Waclawek      09/02/05 06:58      
            cart before horse      Andy Neil      09/02/05 07:03      
               weekend approaching?      Jan Waclawek      09/02/05 07:34      
                  sure we can, but then why do you say the      Erik Malund      09/02/05 07:55      
   this belong in the chat, but since it is      Erik Malund      09/02/05 11:07      
      hrm      Jeff Corr      09/02/05 12:10      
         make an effort do not "whip up some code      Erik Malund      09/02/05 13:36      
            facts & emotions      Jan Waclawek      09/02/05 14:50      
               k      Jeff Corr      09/02/05 15:29      
                  Good luck with the 430's      Russell Bull      09/02/05 18:20      
                     int      Jeff Corr      09/02/05 18:44      
                        Slight misconception.      Andy Neil      09/03/05 02:13      
                           Next step      Andy Neil      09/03/05 02:39      
         -1 provocative troll      Terry Lingle      09/02/05 17:25      
            read      Jeff Corr      09/02/05 18:50      
               which derivative?      Jan Waclawek      09/03/05 07:20      
                  dallas      Jeff Corr      09/04/05 00:37      
                     DS89C420      Jan Waclawek      09/04/05 03:55      
                        system im using      Jeff Corr      09/04/05 08:49      
                           int      Jeff Corr      09/04/05 09:28      
                              Process      Andy Neil      09/05/05 00:04      
                                 Why do you persist      Erik Malund      09/06/05 09:02      
                              2 byte protocol      Robert Revens      09/05/05 03:24      
                                 Intersting, but...      Andy Neil      09/05/05 04:50      
                                    very interesting      Jeff Corr      09/05/05 19:33      
                                       How to proceed      Andy Neil      09/06/05 00:02      
                     a problem and a suggestion      Erik Malund      09/06/05 09:00      
   Problems many & varied      Russell Bull      09/05/05 20:46      
      Begin at the beginning!      Andy Neil      09/05/05 23:59      
         started again      Jeff Corr      09/06/05 00:31      
            Re: started again      Hans Van Pelt      09/06/05 01:07      
               ah crap.      Jeff Corr      09/06/05 01:18      
                  ah my eyes!      Hans Van Pelt      09/06/05 01:36      
                     continued..      Jeff Corr      09/06/05 01:47      
                        Second UART      Hans Van Pelt      09/06/05 01:58      
                           int vector      Jeff Corr      09/06/05 02:33      
                              Look at the datasheet !      Steve M. Taylor      09/06/05 02:37      
                                 yup      Jeff Corr      09/06/05 03:37      
            serial port 1 interrupt vector      Jan Waclawek      09/06/05 02:06      
               okay      Jeff Corr      09/06/05 02:41      
                  Still not OK      Hans Van Pelt      09/06/05 03:18      
                     ISR reset      Jeff Corr      09/06/05 03:41      
                  take rest      Jan Waclawek      09/06/05 03:18      
                     rest........      Jeff Corr      09/06/05 03:43      
                        STOP      Steve M. Taylor      09/06/05 04:07      
                        just to be sure...      Jan Waclawek      09/06/05 04:09      
                           man int triggering      Jeff Corr      09/06/05 05:48      
            Craig, please remove this thread this is      Erik Malund      09/06/05 09:05      
               Request        Craig Steiner      09/06/05 09:16      
   num      Jeff Corr      09/06/05 07:32      
      again      Jan Waclawek      09/06/05 07:57      
         Thanks ALOT Jan !!      Jeff Corr      09/06/05 11:11      
            works, so now do the reading      Jan Waclawek      09/06/05 14:46      
               serial port int      Jeff Corr      09/07/05 20:41      
                  transmit      Jan Waclawek      09/07/05 23:15      
                     transmit      Jeff Corr      09/08/05 08:53      
                        Oh dear      Donald Catto      09/09/05 09:55      
                           I dont give up.      Jeff Corr      09/09/05 16:22      
                              er      Steve M. Taylor      09/09/05 17:31      
                                 brains?      Jeff Corr      09/10/05 08:19      
                                    Or lack thereof...      Donald Catto      09/12/05 06:45      
                              Persistance is a virtue      Russell Bull      09/09/05 17:39      
                                 basics      Jeff Corr      09/10/05 08:22      
   updated      Jeff Corr      09/14/05 18:48      
      Solve i problem at a time      Russell Bull      09/15/05 01:44      
   one more problem knocked down      Jeff Corr      09/16/05 00:32      
      PWM spoiled by Rx      Jan Waclawek      09/16/05 03:51      
         lines      Jeff Corr      09/16/05 13:45      

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