Troubled with Instant Ints and TMR2

Hello....
I have been looking at this code all the day and cant find my mistake

i am using a 420Hz frequency as input to the Comparator in 16f628, the signal is correctly biased to 2.5v and Vref is set to Vcc/2.

So now... i am trying to sample this signal into a Bits array and then sending through serial port.

Code:

;----[ Change these to match your LCD ]--------------------------------------- LCD_DB4 VAR PORTA.6 LCD_DB5 VAR PORTB.6 LCD_DB6 VAR PORTB.5 LCD_DB7 VAR PORTB.4 LCD_RS VAR PORTA.0 LCD_E VAR PORTA.7 LCD_Lines CON 2 ' # of Lines on LCD, 1 or 2 (Note: use 2 for 4 lines) LCD_DATAUS CON 50 ' Data delay time in us LCD_COMMANDUS CON 2000 ' Command delay time in us INCLUDE "LCD_AnyPin.pbp" ; *** Include MUST be AFTER LCD Pin assignments **** INCLUDE "DT_INTS-14628.bas" INCLUDE "ReEnterPBP.bas" INCLUDE "modedefs.bas" INCLUDE "Elapsed_INT628b2.bas" DEFINE OSC 4 DEFINE HSER_RCSTA 90h ' Set transmit register to transmitter enabled DEFINE HSER_TXSTA 24h ' Set baud rate DEFINE HSER_BAUD 9600 DEFINE HSER_CLROERR 1 PinActivar VAR portb.0 PinDescuelgue VAR porta.5 PinPolaridad VAR porta.4 InZCD VAR porta.2 PinDTMF VAR portb.7 PinOffHook VAR portb.3 TMR2_clock VAR WORD FlagSample VAR BIT NumSamples VAR BYTE Samples VAR BIT [124] x VAR BYTE ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR2_INT, _Sample, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM @ INT_ENABLE TMR2_INT ; Enable Timer 1 Interrupts ;----[ Your Main program starts here ]---------------------------------------- LoopCount VAR WORD Config: trisb.0=0 trisa.5=1 trisa.4=1 trisa.2=1 trisb.7=0 trisb.3=0 CMCON = 5 VRCON = %11101100 OPTION_REG = %00000000 T2CON = %00000000 ' TMR2 prescale 1:1 PAUSE 500 : LCDOUT $FE,1 : PAUSE 250 PR2 = 125 ' load tmr2 PR2 to reset every 1ms MAIN: HIGH PINACTIVAR GOSUB GETSAMPLE PAUSE 1000 GOTO MAIN GetSample: T2CON.2 = 1 NumSamples = 0 FlagSample = 0 WHILE FlagSample = 0 WEND HSEROUT [":",10,13] FOR x = 0 TO 119 HSEROUT [DEC Samples [x],10,13] NEXT x RETURN Sample: Samples [NumSamples] = CMCON.7 NumSamples = NumSamples + 1 IF NumSamples = 120 THEN FlagSample = 1 T2CON.2 = 0 ENDIF @ INT_RETURN </code></pre></body>

My problem is that the frequency sample doesnt match, it seems like the interrupt period is not consecuent with my need..

I am using PR= 125, and with internal clock 4Mhz this should interrupt 0.000125s or 8000Hz.

This doesnt seemd to be the case. Please any advice on how to interrupt with this TMR2 each 125uS.

How can i confirm that my program is interrupting every 0.000125 Seconds?, maybe i am wrong somewhere else.

Thanks for any help

Code:

INCLUDE "LCD_AnyPin.pbp" ; *** Include MUST be AFTER LCD Pin assignments **** INCLUDE "DT_INTS-14628.bas" ' * * * * * this one * * * * INCLUDE "ReEnterPBP.bas" INCLUDE "modedefs.bas" INCLUDE "Elapsed_INT628b2.bas" ' * * * * and this one * * * *

Are the files marked ' * * * * this one * * * * altered from Darrels originals ?

INCLUDE "DT_INTS-14.bas" ' Base Interrupt System

INCLUDE "Elapsed_INT.bas" ' Elapsed Timer Routines

Or did I miss one of Darrel's Masterpiece releases ?

is it me or you should use TMR2 instead of PR2?

Try TMR2=TMR2+138 (or something around it) and toggle a led to know what happen

i'm a bit rusty here... and i can't test it... damn!

Joe,
no you didn't miss something, probably because Josuetas got a error message about a wsave beyond ram end or something like that.

So my guess is that he comment out the offending line in those files and use a specific name for it.

Thanks for your replies

Joe S.

Modifications...
i have a DT for 628A since it needs bank modification from 877A.
In the second one i am modifing Elapsed to interrupt every 125us it is not meant for timing but for interrupting. All i did was modifing the timerconst to be $FFA7 in the case of 4Mhz Osc. I am not using this anyway you can see the TMR1 interrupt is not defined for elapsed interrupt, only TMR2.

mister_e

If i get this right, and from the datasheet the timer2 interrupts when Tmr2 reaches PR2 value, tmr2 "should" go to 0 after this, BUT it seemed not TO i had to turn TMR2= 0 in the interrupt routine, Otherwise i was getting weird interruptions (watched it on my osciloscope)

Still cant get my 125us interrupt with 4Mhz internal OSC this should be possible unless DT´s routines take more than 125 instructions to work (just my guess),.. Patience....Again i am sure HE knows ;)

oups... missed the Elapsed timer... i'll read the according posts/thread about it as i never used it.

Sorry :(

I just doesnt work.. Impossible?

Ok i figured out a way to measure my interrupts.

The interrupt routine simply Toggles a pin of the micro on each interrupt and i measure such pin with my oscilloscope. The frequency of sampling is wrong.

Problems:

1. The TMR2 doesnt just go back to 0 after reaching PR2 value.. i had to set it to 0 otherwise i get unwanted interrupts.

2. I cant believe this to be impossible so i made a small RX int.... when i press "1" PR increases by one.. else it goes down one, so i can sweep controlling by my keyboard. RESULT: No No it doesnt work.... i never get to my 125us interrupt it suddenly jumps back to the lower frequency after a point.

Is 125us to much to ask for 4Mhz.. teorically i would say No.. 125 instructions are a lot of instructions... and i am only sampling at this point of my software so: what could be the problem?

I cant use other OSC since i am using internal OSC and A7 pin for other purpouses... Since i am only sampling would something like pauseuS 125 : sample work?... What should be the timing consideration in this case?

i still need someting like:

Code:

Sample: pauseus 125 Samples [NumSamples] = CMCON.7 NumSamples = NumSamples + 1 IF NumSamples = 120 THEN return goto Sample

How many instructions take this sub to work? i guess i have to take them into account for my timing to be correct!!!

Thanks on any help.. Interrupt 125uS 4Mhz still in need!!

mmm, can you (or someone else) try the following for me? Try both with a 4 MHz and then with a 20MHz crystal. You just need to change the DEFINE OSC and the code will automatically change for you (config fuses, Prescaller and PR2). Sit a scope on PinActivar (PORTB.0) and measure the frequency. It has to be close of 4KHz

Code 1 with ON INTERRUPT

Code:

DEFINE OSC 4 ' select 4 or 20 PinActivar VAR portb.0 LoopCount VAR WORD TMR2IF VAR PIR1.1 TRISB = 0 portb = 0 INTCON = %11000000 PIE1 = %00000010 PIR1 = %00000000 OPTION_REG = %00000000 PinActivar = 0 @ IF (OSC==20) @ __config _HS_OSC & _WDT_ON & _PWRTE_ON & _MCLRE_ON & _LVP_OFF & _CP_OFF pr2 = 155 T2CON = %00000101 ' TMR2 Prescale 1:4 @ ELSE @ __config _XT_OSC & _WDT_ON & _PWRTE_ON & _MCLRE_ON & _LVP_OFF & _CP_OFF PR2 = 118 T2CON = %00000100 ' TMR2 prescale 1:1 @ ENDIF ON INTERRUPT GOTO Sample MAIN: GOTO MAIN disable Sample: TOGGLE PinActivar tmr2if=0 resume enable

Code 2, with DT-INT

Code:

DEFINE OSC 4 ' select 4 or 20 INCLUDE "c:\pbp_prog\Include_routines\DT_INTS-14.bas" INCLUDE "c:\pbp_prog\Include_routines\ReEnterPBP.bas" ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR2_INT, _Sample, PBP, YES endm INT_CREATE ENDASM PinActivar VAR portb.0 TRISB = 0 portb = 0 OPTION_REG = %00000000 @ IF (OSC==20) @ __config _HS_OSC & _WDT_ON & _PWRTE_ON & _MCLRE_ON & _LVP_OFF & _CP_OFF pr2 = 155 ' load tmr2 PR2 to reset every 125 uSec T2CON = %00000101 ' TMR2 Prescale 1:4 @ ELSE @ __config _XT_OSC & _WDT_ON & _PWRTE_ON & _MCLRE_ON & _LVP_OFF & _CP_OFF PR2 = 118 T2CON = %00000100 ' TMR2 prescale 1:1 @ ENDIF @ INT_ENABLE TMR2_INT MAIN: GOTO MAIN Sample: toggle pinactivar @ INT_RETURN

i'm curious to knwo if there's any significant difference between the above, and how much. I feel them equal @20MHz, but some doubt on 4MHz.

Obviously this code don't do anything interesting... i'm just curious...

As i said, i can't check anything it here.

Quote:

Originally Posted by Josuetas

Still cant get my 125us interrupt with 4Mhz internal OSC this should be possible unless DT´s routines take more than 125 instructions to work (just my guess),.. Patience....Again i am sure HE knows ;)

This page might explain it.
http://darreltaylor.com/DT_INTS-14/kudos.html
Especially the last paragraph.

Ok now thats bad news

So Darrel if i made this with just an ASM interrupt i would be able to get my 125uS since i wouldnt need the Reenter Context Saving...

BUT please o please can you help me?..

I use to get to this point where: i dont know any assembler!!!
even worst
A bit Array of 120 samples in Assembler .... mmm..... mmmmm....

By the way would you consider (in my case) the pauseus 125 Take Sample option?

Please some lead to solve this matter.

Thanks again

DJC

Maybe this would work better tha Instant Interrupts here!

Quote:

Originally Posted by mister_e

Code 1 with ON INTERRUPT

Code:

DEFINE OSC 4 ' select 4 or 20 PinActivar VAR portb.0 LoopCount VAR WORD TMR2IF VAR PIR1.1 TRISB = 0 portb = 0 INTCON = %11000000 PIE1 = %00000010 PIR1 = %00000000 OPTION_REG = %00000000 PinActivar = 0 @ IF (OSC==20) @ __config _HS_OSC & _WDT_ON & _PWRTE_ON & _MCLRE_ON & _LVP_OFF & _CP_OFF pr2 = 155 T2CON = %00000101 ' TMR2 Prescale 1:4 @ ELSE @ __config _XT_OSC & _WDT_ON & _PWRTE_ON & _MCLRE_ON & _LVP_OFF & _CP_OFF PR2 = 118 T2CON = %00000100 ' TMR2 prescale 1:1 @ ENDIF ON INTERRUPT GOTO Sample MAIN: GOTO MAIN disable Sample: TOGGLE PinActivar tmr2if=0 resume enable

Mister_E i am going to test with the ON INTERRUPT way because it might work better here, i am not doing much code between Samples so this could work fine. Thanks for the idea...

The DT option as you can read at Darrels link will not work either.

>> So Darrel if i made this with just an ASM interrupt i would be able to get my 125uS since i wouldnt need the Reenter Context Saving...
Correct.

>> A bit Array of 120 samples in Assembler .... mmm..... mmmmm....
In ASM, you would just shift the bits into a byte var. After 8 bit's move to the next byte. After 15 bytes you're done.

>> By the way would you consider (in my case) the pauseus 125 Take Sample option?

YES!
Your program just sits in a loop anyways, waiting for the sample to finish.
No need to use interrupts, if it's not doing anything in the first place.

Or, you can still use the timer. Just poll the TMR2IF Flag.

Thanks for your advise Darrel

I will keep working on the interrupt option... This is supposed to detect DTMF (we talk about it before) so for it to work in the background of anything else is the best choice.

Everything is so complicated in ASM!.. thanks god there is picbasic.

Here's a quick untested stab at an ASM handler.

Change the Handler type to ASM

Code:

Samples VAR BYTE[15] BANK0 SYSTEM SamplePTR VAR BYTE BANK0 SYSTEM SamplesAddr CON EXT @SamplesAddr = Samples BitCount VAR BYTE BANK0 SYSTEM ByteCount VAR BYTE BANK0 SYSTEM FlagSample VAR BIT TMR2ON VAR T2CON.2 ;----[Start getting the 120 samples]------------------------------------------ GetSamples: FlagSample = 0 SamplePTR = SamplesAddr ByteCount = 15 BitCount = 8 PR2 = 125 : TMR2 = 0 : TMR2ON = 1 return ;----[TMR2 Handler]----------------------------------------------------------- ASM Sample MOVE?BB SamplePTR, FSR ; Load FSR with pointer to array MOVE?TT CMCON,7, STATUS,C ; Put sample in carry flag rrf INDF, F ; Shift in the sample bit decfsz BitCount, F ; Are all 8 bits in ? goto Int_Done ; NO, done for now MOVE?CB 8, BitCount ; Yes, reset bitcount incf SamplePTR, F ; Point to next byte decfsz ByteCount, F ; Are all 15 bytes done ? goto Int_Done ; NO, done for now MOVE?CT 1, _FlagSample ; Yes, Indicate - Samples Complete MOVE?CT 0, _TMR2ON ; stop the timer Int_Done INT_RETURN ENDASM

I Will be testing it for the next couple of hours

Your wish to help is INFITE and appreciated Darrel.

Thanks Again

Ha!

You are using ....

LCD_AnyPin
Instant Interrupts
Elapsed Timer

and you showed your "Colors" when posting.

How could I possibly Not Help?? :)

Hey!!!! your right

Hey!!!!

Wait a second... your right!!

Soon i´ll end up looking like a mouse with a red Book in my hands!! :D

2 Attachment(s)

Ok it took me more than a couple of hours

Hi Darrel

I made some tests on the ASM handler for my TMR2 interrupt, it works ALMOST fine.

Before posting i double checked this.

First The timer is interrupting correctly every 0.000125uS and taking the samples, how did i checked this? well first i used HSEROUT to my serial port of the whole sample and i got something. At the Same time i needed to check the timing, so i modified the handler to add a toggle of a pin in the uC after each Sample, then i measured it with the oscilloscope and got the correct frequency.

Code:

<html> <head></head> <body><pre><code>CLEAR DEFINE OSC 4 DEFINE HSER_RCSTA 90h ' Set transmit register to transmitter enabled DEFINE HSER_TXSTA 24h ' Set baud rate DEFINE HSER_BAUD 9600 DEFINE HSER_CLROERR 1 LCD_DB4 VAR PORTA.6 ;************LCD_AnyPin declarations LCD_DB5 VAR PORTB.6 LCD_DB6 VAR PORTB.5 LCD_DB7 VAR PORTB.4 LCD_RS VAR PORTA.0 LCD_E VAR PORTA.7 LCD_Lines CON 2 LCD_DATAUS CON 50 LCD_COMMANDUS CON 2000 INCLUDE "LCD_AnyPin.pbp" INCLUDE "DT_INTS-14628.bas" INCLUDE "ReEnterPBP.bas" INCLUDE "Elapsed_INT.bas" PinActivar VAR porta.3 PinDescuelgue VAR porta.5 PinPolaridad VAR porta.4 InZCD VAR porta.2 PinDTMF VAR portb.7 PinOffHook VAR portb.0 Samples VAR BYTE[15] BANK0 SYSTEM SamplePTR VAR BYTE BANK0 SYSTEM SamplesAddr CON EXT @SamplesAddr = Samples BitCount VAR BYTE BANK0 SYSTEM ByteCount VAR BYTE BANK0 SYSTEM FlagSample VAR BIT TMR2ON VAR T2CON.2 NumSamples VAR BYTE ComIn VAR BYTE x VAR BYTE 'Counter Byte ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? ;INT_Handler RX_INT, _Hablar, PBP, yes INT_Handler TMR2_INT, Sample, ASM, yes ;INT_Handler TMR1_INT, _ClockCount, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM ;@ INT_ENABLE RX_INT ; Enable Timer 1 Interrupts ;@ INT_ENABLE TMR1_INT ; Enable Timer 1 Interrupts @ INT_ENABLE TMR2_INT ; Enable Timer 1 Interrupts Config: trisb.0=0 trisa.5=1 trisa.4=1 trisa.2=1 trisb.7=0 trisb.3=0 trisa.3=0 CMCON = 5 CMCON.5 = 1 'INVERTIDO VRCON = %11101100 OPTION_REG = %00000000 PAUSE 500 : LCDOUT $FE,1 : PAUSE 250 HSEROUT ["7"] 'gosub ResetTime 'gosub StartTimer ;@ INT_DISABLE TMR1_INT ; Enable Timer 1 Interrupts ;@ INT_DISABLE RX_INT ; Enable Timer 1 Interrupts 'HPWM 1,127,420 LOW PinDTMF HIGH PinOffHook main1: GOSUB GetSamples WHILE FlagSample = 0 WEND GOTO main1 MAIN: HIGH PinActivar GOSUB GetSamples WHILE FlagSample = 0 WEND HSEROUT [":",10,13] FOR x = 0 TO 14 HSEROUT [BIN8 Samples[x],10,13] NEXT x PAUSE 5000 GOTO MAIN ;----[Start getting the 120 samples]------------------------------------------ GetSamples: FlagSample = 0 SamplePTR = SamplesAddr ByteCount = 15 BitCount = 8 PR2 = 125 : TMR2 = 0 : TMR2ON = 1 RETURN ;----[TMR2 Handler]----------------------------------------------------------- 'ASM 'Sample ' MOVE?BB SamplePTR, FSR ; Load FSR with pointer to array ' MOVE?TT CMCON,7, STATUS,C ; Put sample in carry flag ' rrf INDF, F ; Shift in the sample bit ' decfsz BitCount, F ; Are all 8 bits in ? ' goto Int_Done ; NO, done for now ' MOVE?CB 8, BitCount ; Yes, reset bitcount ' incf SamplePTR, F ; Point to next byte ' decfsz ByteCount, F ; Are all 15 bytes done ? ' goto Int_Done ; NO, done for now ' MOVE?CT 1, _FlagSample ; Yes, Indicate - Samples Complete ' MOVE?CT 0, _TMR2ON ; stop the timer 'Int_Done ' btfsc PORTA, 3 ; Toggle porta.3 to check Interruption on OScilloscope ' goto Int_DNZ ; this really looks stupid.. longer than the rest of the ' goto Int_DZ ; routine :P ' Int_DZ ' bsf PORTA, 3 ' goto Int_Done1 ' Int_DNZ ' bcf PORTA, 3 ' Int_Done1 ' INT_RETURN 'ENDASM ASM Sample MOVE?BB SamplePTR, FSR ; Load FSR with pointer to array MOVE?TT CMCON,7, STATUS,C ; Put sample in carry flag rrf INDF, F ; Shift in the sample bit decfsz BitCount, F ; Are all 8 bits in ? goto Int_Done ; NO, done for now MOVE?CB 8, BitCount ; Yes, reset bitcount incf SamplePTR, F ; Point to next byte decfsz ByteCount, F ; Are all 15 bytes done ? goto Int_Done ; NO, done for now MOVE?CT 1, _FlagSample ; Yes, Indicate - Samples Complete MOVE?CT 0, _TMR2ON ; stop the timer Int_Done btfsc CMCON,7 ; Toggle porta.3 to check Interruption on OScilloscope goto Int_DNZ ; this really looks stupid.. longer than the rest of the goto Int_DZ ; routine :P Int_DZ bcf PORTA, 3 goto Int_Done1 Int_DNZ bsf PORTA, 3 Int_Done1 INT_RETURN ENDASM Hablar: ' FUNCION DE INTERRUPCION DEL PUERTO SERIE, RECIBE CORRECTAMENTE TODOS LOS DATOS WHILE PIR1.5 ' If RCIF is set, then read RCREG until it's clear ComIn = RCREG WEND HSEROUT [ComIn] @ INT_RETURN </code></pre></body> </html>

Then here is what i got from my Serial Port

11111110
00000011
11111000
00011111
11000000
01111111
00000000
11111110
00000111
11110000
00011111
10000000
11111111
00000000
11111100

My first impression GREAT!! but nono. Why? because The fecuency sampled is 420Hz, considering 0.000125 samples per second the period of the signal should be (1/420Hz)/0.000125uS = 19 samples aproximately. From what i am getting you can see that the period is around 15 samples, which means 533,3 Hz.

So i Though maybe the comparator is not working correctly...but... Another modification to the handler to make porta.3 follow the comparator output showed this picture. Its a DTMF code not the 420Hz i used as sample.

<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2071&stc=1&d=1 191624484" width="160" height="98" />

So the Comp is working fine, and the sampling is being done a the correct frequency.
Here i took the 420Hz Comparator Output.

<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2072&stc=1&d=119162493 3" width="160" height="98" />

Could it be... this is my last one... that something is wrong with the Handler... maybe between Byte changes a bit is missing? Obviously i have no idea of what you did there, BY THE WAY you will laugh at my ASM code to check things at porta.3 it has to be awful !!:D. It works but is longer than the sampling part.

Hope you can give me any ideas.

I think I see the confusion. It depends on how you line up the bytes.

For Binary arrays, they go from Right To Left.

Here's the results again ...<table border=1><tr><td align=center>
11111110
00000011
11111000
00011111
11000000
01111111
00000000
11111110
00000111
11110000
00011111
10000000
11111111
00000000
11111100
</td></tr><tr><td align=left>Correct way. 4 bytes Aligned right to left 
<pre> 00011111111110000000001111111110 |------ 19 -------|</pre>
</td></tr><tr><td>Wrong way. 4 bytes Aligned left to right 
<pre> 11111110000000111111100000011111 |---- 14 ----|</pre>
</td></tr></table>

HTH,

Doh!

Doh!
Doh!
Doh!
A whole day looking a that :D

Darrel this is the next question (i havent even look through it), now i have an array of 15 bytes, but i see it has a pointer EXT, is there a way to point to each Bit of this array? i am going to do some math to each bit now and this would be useful.

Something else, this project is short in code Space since i only have 2k of my 628A (no16F88 around here) removing ReEnter could save me 150 instructions? the fact is this piece of code is like 780 words already and i havent done anything :P.

Anyway tomorrow i´ll do the short math, i´ll begin to cry when the word count reaches 1800.

Quote:

...is there a way to point to each Bit of this array?

Melanie has provided the answer. See 3. How can I reference a BIT in a BYTE ARRAY? in her very helpful Bits, Bytes Words and Arrays Post.

Thanks again Melanie. :D

SteveB

Thanks for that link Steve

Thanks Steve i will be using it.

On the other hand.

Darrel this link
http://www.picbasic.co.uk/forum/show...php?t=3891#LAB ...

Its the post about the EXT modifier, i have been using it as a label to create tables in codespace in the past, BUT: right now i am using 628A wich doesn´t support READCODE instruction, can i still use it to create a table in codespace? if so (i guess i can) how can i read it?. It is a 14 bits x 120 Word, since the device is 14 bit i guess i could store each word in a memory space? kind of like the code to store strings in codespace? I havent been able to use the last one since i dont know how the data would be stored as Words and not as strings. Again ignorant about asm:(.

This is my table

Code:

ASM DataTable DW 11111111111111b DW 01010111111111b DW 00000101010101b DW 00000001010101b DW 10101000000101b DW 11111000000000b DW 01111110000000b DW 01011110101000b DW 00000111101010b DW 10000011111010b DW 11100001111110b DW 11111001011111b DW 01111000010111b DW 00011100010111b DW 10000110000101b DW 10000110000001b DW 11100010100001b DW 01110011100000b DW 00111011111000b DW 00011101111000b DW 10001101111110b DW 11000100011110b DW 11100100011111b DW 01110010000111b DW 00111010000111b DW 10011011100001b DW 10001111100001b DW 11001101100001b DW 01100101111000b DW 00110000111000b DW 00110000011000b DW 10011010011110b DW 11001010001110b DW 01001110000110b DW 01100111000111b DW 00110111100111b DW 10110001100011b DW 11010001110001b DW 11001000111001b DW 01001100011001b DW 00101110011000b DW 10110110011100b DW 10110111001100b DW 11010011001110b DW 01001001100110b DW 01001001100111b DW 00101100110011b DW 10110100110011b DW 11110110110001b DW 11010010011001b DW 01000010011001b DW 00001011001100b DW 10101111001100b DW 10111101101100b DW 11110101100110b DW 01010100100110b DW 00000000110110b DW 00001010110011b DW 10101010010011b DW 11111111011011b DW 01111111011001b DW 01010101001001b DW 00000001001101b DW 10000000101100b DW 11101000100100b DW 11111010110110b DW 01111110110110b DW 00010110110010b DW 00000111010011b DW 10000011010011b DW 11100001001011b DW 01111001001001b DW 01111100101101b DW 00011100101101b DW 10000110101100b DW 11000110110100b DW 11100011110100b DW 01111011010010b DW 00111001010010b DW 10011101000010b DW 10001100001011b DW 11000100001011b DW 01100010101011b DW 00110010101101b DW 00111010111101b DW 10011011110101b DW 11001111010100b DW 11000101010100b DW 01100101010010b DW 00110000000010b DW 10111000001010b DW 10011010101011b DW 11001110101011b DW 01001111111111b DW 00100111111101b DW 00110001111101b DW 10110001010101b DW 11011000010100b DW 01001000000000b DW 01001110000000b DW 00100110100010b DW 10110110101010b DW 11110011101010b DW 11010011111111b DW 01001001111111b DW 00001101011111b DW 10101100010101b DW 10110100000101b DW 11110110000101b DW 01010010000000b DW 01001011100000b DW 00001011101010b DW 10101101111010b DW 11111101111010b DW 11110100111111b DW 01010000011111b DW 00000010010111b DW 10001010000101b DW 10101010000101b DW 11111111100001b ENDASM

There's still the 128 Byte EEPROM on board option... but it's way too limited.

LOOKUP(2)?

External EEPROM?

Hi! Thanks Eproom for other stuff

Eproom will store the strings of my LCD, and i would need 256 Bytes to store this table in Eproom vs the posible 120 "SemiWords" of codeSpace.

Thanks for your concern

And.. no external component.. i am looking for a low budget device here, also low Real State.

Quote:

Originally Posted by Josuetas

Doh!
Doh!
Doh!
A whole day looking a that :D

Darrel this is the next question (i havent even look through it), now i have an array of 15 bytes, but i see it has a pointer EXT, is there a way to point to each Bit of this array? i am going to do some math to each bit now and this would be useful.

Something else, this project is short in code Space since i only have 2k of my 628A (no16F88 around here) removing ReEnter could save me 150 instructions? the fact is this piece of code is like 780 words already and i havent done anything :P.

Anyway tomorrow i´ll do the short math, i´ll begin to cry when the word count reaches 1800.

Hi Josuetas,
16F648A is the same chip with 2X the codespace and similar price, uses same data sheet too, but you get 4K instead of 2K.
JS

Thanks Joe just need to store table in codespace.

You cant imagine how nice it would be for me to find one around here!

The fact is that 648A is sold out, today i went looking for it with no success.

Not finding supplies around here really makes me sad.

So it seems i will have to upgrade the uC to something like 876A, easily found here. Though more expensive. Its sad because 876A is not improving anything for me, maybe just the speed, but even there i will have to use an external OSC ($$).

What i really need here is 16F88, int OSC 8 Mhz always better than 4 Mhz and 4K memory should be enough.

I am from Colombia South America by the way... wanna switch? ;)

Leaving this discussion Aside... i am not done with 628A you know? i havent reached 1800 words (where i will cry) right now i just need to store the table in code space... do you know the way? the solutions about this given in the forum use READCODE wich 628A cant execute.

Aside from lack of PICs, oh and that thing about the cartels . . .I hear Colombia has many nice things, great coffee, emeralds, cattle ranches, I knew a girl from there who went back and became Miss Colombia, and she was cute too !, but no I am too old to make that big of a change. I did not know from where you are hailing, will U S Suppliers not ship to Colombia? I do not know of any techknowlegy restrictions regarding shipping to your Country, You might check with www.Mouser.com

Sure you are right

No complains... it would take like two weeks for that pic to arrive here, and would cost me around 45 dolars (Shipping). Its not that i cant find pics here... there are just not all the ones i want.. switching to 876 its possible but... we are forgetting the real problem... nOT THE PIC!!... i need to store and retrieve that table!!! it has to be pretty simple.. REMEMBER 628 still has free code space.

By the way every one seems to know someone from Colombia... i´ve had more foreign Girlfriends than girls from here.. although yes YES... women here are hot hot. I was kidding about switching i´ve been to many places and i wouldnt.... but the invite is still on the table you MUST visit us :D... someday...