Instant Interrupts - Revisited

**Darrel Taylor** · - 9th October 2009, 05:56

WOW!

Kudos to Microchip Direct!!!
Ordered them on the 5th, shipped from Thailand on the 6th, received on the 8th.
I can't get anything from California shipped that fast.

5 - 16F1937
5 - 16F1936
1 - 16F1934

$34 with shipping (Fed-Ex).

Everything else is on hold.
Time to update DT_INTS-14.

<br>

**Ioannis** · - 9th October 2009, 07:03

I can double that. My experience with Microchip Direct was wonderful.

Either 1 pcs or 250, service is top.

Ioannis

**circuitpro** · - 10th October 2009, 00:56

Darrel,

Want to thank you again for your Instant Interrupts. I inserted them into my huge 18F program, and the elapsed timer is working perfectly! Am going to watch your website and waiting for the "Command Reference"!!

**bcd** · - 10th October 2009, 01:04

I find it is actually easier and quicker to deal with Microchipdirect than the local microchip office - seems to be a lot cheaper as well ! I wonder if the office just orders online and then drop ships ???

Glad to hear you got some new toys ! Looking forward to the news.

bill.

**Darrel Taylor** · - 10th October 2009, 01:22

These chips are Amazing ....
They've got everything you could need in a 16F.
I think I even found a kitchen sink

And they are backwards compatible enough that it shouldn't even take very long for the update to DT_INTS.

At $2.52 ea. for the 40-pin jobs, I may never use another 16F.<hr>

And for the "Command reference" ... It's been waiting a few years now.

Everyone just kinda picked it up and went with it. So I got lazy.
Should've, could've, would've, maybe ...
<br>

**bcd** · - 10th October 2009, 02:31

I love the fact they are 5v as well - seemed a lot of the newer 18f series were moving to 3.3v only.

I think they are my new favourite series of PICs.

bill

**Ioannis** · - 10th October 2009, 10:36

I do not want to destroy the good climate that 16F193x have created, but look at the errata file 80479A.pdf. They have some issues that may affect users that will use EEPROM or CCP rgisters.

Ioannis

**Ioannis** · - 14th October 2009, 16:13

I think next one Darrel has to answer, but if anyone knows...

How fast will the DT-INTS 14 interrupts (with PBP service) respond to a PORTB Interrupt on change?

Or better put, how many cycles will it take?

I am testing a Wiegand-26 reader the has 48uSec pulses every 2ms and at 4MHz the 16F628 chip does not feel it at all.

Another reader the has 0,38ms pulse is OK with the 16F628. The PIC is running rather slow at 4MHz.

I'd prefer a way to calculate the time it takes to respond on an Interrupt.

My service test routine is something like this:

Code:

CardReader:
   if d0=0 then
        array[index]=0
        index=index+1
    endif
   
    if d1=0 then
        array[index]=1
        index=index+1
    endif
@ INT_RETURN

Ioannis

P.S. After some testings I found that the pulse must stay at more that 150uSec for the PIC to grab it. Thats it at 4MHz.

**Ioannis** · - 7th January 2010, 10:14

Originally Posted by Darrel Taylor

WOW!

5 - 16F1937
5 - 16F1936
1 - 16F1934
Time to update DT_INTS-14.

<br>

Hi Darrel. Did you had any luck with these new chips?

Ioannis

**Darrel Taylor** · - 8th January 2010, 05:21

I have.
But they haven't been tested very thoroughly..

The update also includes every interrupt source I could find for 14-bit cores. (including F1's).

This page shows the added sources.
If you use the menu on the left, it will take you back to the old version. So don't.
http://www.darreltaylor.com/DT_INTS-14/intro2.html

Download the file at the bottom of the page. Not the one from the Download page.
DT_INTS-14 version 1.0

Woohoo! It's 1.0 finally.

But consider it still beta.

**Ioannis** · - 8th January 2010, 09:47

I like smiling faces!

Amazing! Thanks.

I have to test them on the new PICs. Wonder whenthey are coming...

Ioannis

**alanmcf** · - 11th January 2010, 01:28

Hey Darrel--

I've been trying to reach you re: the consulting I'd hired you to do. I've sent three emails with no response. If you need more money, I'm happy to pay it, and you also have $2200 of my company's equipment... won't you please reply to me?

Thanks--

--Alan McFarland
www.nila.tv

**Darrel Taylor** · - 11th January 2010, 01:47

That's just wrong, on so many levels.
I have no Public response. But I will leave this post here.

<br>

**vamtbrider** · - 25th March 2010, 19:16

I have a small test board that has an ICSP and a USB connection to a pic 18f4550. I have a reset button on the MCLR and a second button on portb.1. An led is connected to portb.0

The ICSP is used to program a bootloader onto the chip. Then USB is used to add the user program.

I have loaded the Diolan bootloader onto this chip and it is working.

I can make a test program in PBP 2.6 that flashes the LED on port b.0
like this: The Bootloader required code to start at 0x800

Code:

DEFINE OSC 48
DEFINE RESET_ORG 0x800
' Example program to blink an LED connected to PORTB.0 about 
' once a second

Main:   
   High 0          ' Turn on LED connected to PORTB.0
   Pause 500       ' Delay for .5 seconds

   Low 0           ' Turn off LED connected to PORTB.0
   Pause 500       ' Delay for .5 seconds

   Goto Main       ' Go back to loop and blink LED forever
   End

The above program works as expected. So the next step was to try the DT_INTS-18 with the bootloader...the code appears to load into the PIC fine, but after reset there is a pause of about 5 seconds then the chip shows up as an un-recognized USB device but does not enter the bootloader mode. To enter bootloader mode the PB on portb.1 is held down during power-on/reset. OR the user application can branch to 0x0016.

It appears the program is branching somewhere to restart the bootloader code since the pic shows up as an unrecognized USB device. It should not show up at all after the code is loaded since I don't have any usb code in the user app listed below.

Here is my test program with the DT_INTS-18 that is not working...

Code:

    DEFINE OSC 20          
    DEFINE RESET_ORG 0x800  
                          
INCLUDE "DT_INTS-18.bas"     ' Base Interrupt System
INCLUDE "ReEnterPBP-18.bas"     ' Include if using PBP interrupts

LED1   VAR  PORTB.0

ASM
INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler   TMR1_INT,  _ToggleLED1,   PBP,  yes
    endm
    INT_CREATE               ; Creates the interrupt processor
ENDASM

T1CON = $31                ; Prescaler = 8, TMR1ON
@ INT_ENABLE  TMR1_INT     ; enable Timer 1 interrupts

Main:
  PAUSE 1
GOTO Main

'---[TMR1 - interrupt handler]--------------------------------------------------
ToggleLED1:
     TOGGLE LED1
@ INT_RETURN

Any thoughts on why it's not blinking the led using the DT_INTS-18 code and running off into la la land?

ADDED: I am using the MPASM assembler as well.

Thanks
Tom

**Bruce** · - 25th March 2010, 20:26

Does it work if you disable A/D on RB0?

**vamtbrider** · - 25th March 2010, 21:00

I added the port configuration and acon register configs. That has an effect...
The bootloader never leaves the bootloader mode to run the user app.

if I comment out the Hardware configuration section and compile I can load the code via the bootloader, the device disappears from the USB list and then ~10seconds later I get the USB device not recognized.

I have reloaded the led test program just to make sure the bootloader and chip are still working and they are. Very puzzling, but the registers do seem to have an effect.

Nothing in the DT_INT writes to EEPROM 0x00? If there is a 5A there then the bootloader thinks its still in boot mode.

Code:

    LED1   VAR  PORTB.0
    
    DEFINE OSC 20          
    DEFINE RESET_ORG 0x800  
    
    INCLUDE "DT_INTS-18.bas"        ' Base Interrupt System
    INCLUDE "ReEnterPBP-18.bas"     ' Include if using PBP interrupts                                           

    '   Hardware configuration
    '   ======================    
        '
        '   I/O and PORTs
        '   -------------  
    PORTB   =   0
    PORTC   =   0
    PORTD   =   0
    PORTE   =   0
    TRISB   =   %00000000       '<2-1> Inputs
    TRISC   =   0
    TRISA   =   0
    TRISD   =   0
    TRISE   =   0
        '
        '   A/D converter
        '   -------------       
    ADCON0  =   %00000000       ' A/D converter off     
    ADCON1  =   %00001111       ' All Digital Inputs
 '   ADCON2  =   %00000000 
                           


ASM
INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler   TMR1_INT,  _ToggleLED1,   PBP,  yes
    endm
    INT_CREATE               ; Creates the interrupt processor
ENDASM    




T1CON = $31                ; Prescaler = 8, TMR1ON
@ INT_ENABLE  TMR1_INT     ; enable Timer 1 interrupts

Main:
    Pause 10  
GOTO Main

'---[TMR1 - interrupt handler]--------------------------------------------------
ToggleLED1:
     TOGGLE LED1
@ INT_RETURN

Still puzzled...

**ScaleRobotics** · - 14th July 2010, 22:05

Is there a way to use an assembly lookup table from within a DT INTS ASM interupt? When I try, the interrupt locks up on me. If I comment out the CALL SineTable, all is fine. I have tried it a few different ways, but no go so far.

Code:

INCLUDE "DT_INTS-18.bas"     ; Base Interrupt System
LOW  LED1     
high led2     
ASM

INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler   TMR1_INT,   ToggleLED1,   ASM,  yes
    endm
    INT_CREATE               ; Creates the interrupt processor
ENDASM

T1CON = $31                  ; Prescaler = 8, TMR1ON
@   INT_ENABLE  TMR1_INT     ; Enable Timer 1 Interrupts  

Main:
    @ NOP
GOTO Main

'---[TMR1_INT - interrupt handler]------------------------------------------
ASM

ToggleLED1
        btg     _LED1               ; toggle the pin
        btg     _LED2
StepLoop
        movf    _STEPCOUNT,W    ; Pass table offset via W
        call    SineTable    ; Get table value 
        movwf   CCPR1L
        decfsz  _STEPCOUNT,F    ; Next step
        goto    $+6
        movlw   d'32'
        movwf   _STEPCOUNT ;_STEPCOUNT    ; Load counter for 32 steps  
        NOP
        NOP
        NOP
        NOP
    INT_RETURN
SineTable   
        addwf   WREG        ;added for pic18f each address is 16 bits
        addwf    PCL,F
        retlw   d'0'          ; Dummy table value
        retlw   d'128'        ; 0 degree, 2.5 volt
        retlw   d'148'
        retlw   d'167'
        retlw   d'185'
        retlw   d'200'
        retlw   d'213'
        retlw   d'222'
        retlw   d'228'
        retlw   d'230'        ; 90 degree, 4.5 volt
        retlw   d'228'
        retlw   d'222'
        retlw   d'213'
        retlw   d'200'
        retlw   d'185'
        retlw   d'167'
        retlw   d'148'
        retlw   d'128'        ; 180 degree, 2.5 volt
        retlw   d'108'
        retlw   d'89'
        retlw   d'71'
        retlw   d'56'
        retlw   d'43'
        retlw   d'34'
        retlw   d'28'
        retlw   d'26'        ; 270 degree, 0.5 volt
        retlw   d'28'
        retlw   d'34'
        retlw   d'43'
        retlw   d'56'
        retlw   d'71'
        retlw   d'89'
        retlw   d'108'
ENDASM

**Darrel Taylor** · - 14th July 2010, 23:12

You should be able to do that.

But I think you need to initialize the STEPCOUNT variable, or put a CLEAR at the top.
If it powers up with a value higher than 32, the table jump will throw it outside of the interrupt code.

hth,

**younesmaia** · - 6th February 2010, 14:43

Hi,

I´m not being able to access Darrell´s website to download DT_INTS-14 (I already use INTS-18, which is great, but I´m working on a project which runs on a 16F628A this time). Can someone please attach the latest version of both INTS-14 and INTS-18 to this thread, so people can download even if the site is down?

Thanks!

**ScaleRobotics** · - 6th February 2010, 15:02

Here is the latest version 1.00 of DT_INTS-14. The link is to is site, which is back up. http://www.darreltaylor.com/DT_INTS-14/NEW_DT_INTS.zip

More info on above:http://darreltaylor.com/DT_INTS-14/intro2.html
Older version of above:http://darreltaylor.com/DT_INTS-14/intro.html

and here is the latest version of DT_INTS-18 http://www.picbasic.co.uk/forum/showthread.php?p=82871
More info on DTS_INTS-18: http://darreltaylor.com/DT_INTS-18/home.html

Besides the webpages above, this post contains info about the time re-enter takes, which I did not see details of on Darrel's site.
http://www.picbasic.co.uk/forum/show...7587#post17587

**younesmaia** · - 6th February 2010, 15:04

Originally Posted by scalerobotics

Here is the latest version 1.00 of DT_INTS-14. The link is to is site, which is back up. http://www.darreltaylor.com/DT_INTS-14/NEW_DT_INTS.zip

More info on above:http://darreltaylor.com/DT_INTS-14/intro2.html

and here is the latest version of DT_INTS-18 http://www.picbasic.co.uk/forum/showthread.php?p=82871

Still down for me here in Brazil... Even tried do flush my DNS cache to make sure... Would you be kind enough to attach INTS-14 to your post, so I can continue working?

Thanks!

**younesmaia** · - 6th February 2010, 15:25

Thanks. Now only the only file I still need is elapsed_int-14. Could you please upload that one as well?

Thanks again!

Thread: Instant Interrupts - Revisited

Thread Tools

Search Thread

Display

Hybrid View

I'll third that !!

Time to respond to an interrupt.

Trying to reach Darrel...

Diolan Bootloader, 18F4550, DT_INTS-18

Odd

Help with assembly table lookup with DT INTS?

DT site down...

Similar Threads

Clock using Instant Interrupts

DT instant interrupts with mister_e keypad

DT's Instant Interrupts trouble

Keypad and DT's Instant Interrupts

Problems with instant interrupts from DT for pic18

Members who have read this thread : 5

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions