A little DTMF help

[BigWumpus]

It compiles fine with the MP (instead of MPASM). (228 words in a 16F876A .. snif)
You must put some lines together.... they are wrapped.

Maybe it is interesting to check the OEM-signal of the ISD-chip to wait for the end of a message, before sending the next...

The "pause 20" around the ce=x can be shortened to "pauseus 10".

Why are you using 20Mhz ? It is VERY fast for this slow devices !
at 4MHz you can throw away some pauses....

[Travin77]

I did that. I had a routine that was interupt based on the EOM pin during which the pic would do nothing until the EOM bit was pulsed low. I found that I really didn't need to do that. I didn;t gain anything from it. My problem isn't the decode, its the if then statements. The pic just won't do them. It won't go on in the program, it won't play the error message, it just wants to loop back to the beginning. Do you have another way of doing the password section? As to why I am using 20 mhz, I don't know, thats just what I was using. I will try a 4 mhz osc. Now I guess my question for that is it still as OSC_hs or just external?

Travin

[BigWumpus]

Your code looked good:

if password[0]<>"1" Then goto error
if password[1]<>"2" Then goto error
...
if password[7]<>"8" Then goto error
menu:

error:



You can extend the Output_DTMF-routine to wait for the EOM-bit in the beginning.
And you can add some code in order to use this routine to play the other menu-messages, too.

[Travin77]

Well, I don't know what else to try. The code just doesn't work past the entry. The if then statements just don't work for some reason or maybe the pic is bad. I know for sure the decode process works as well as all of the addresses for the messages work as well. thanks for the help.

Travin

[BigWumpus]

OK,

the if-then-part must work !

Just insert this before:

password[0]="1"
password[1]="2"
...
password[7]="8"

and write, what happens !

[Travin77]

I found the problem. The isd chip is not playing the error or menu message. I put a led in those routines. I know now that the program is getting through them I guess I am not interfacing with the isd chip correctly. Back to the manual. Thanks for the help bigwimpus. If anyone knows how to properly interface to a isd chip (25120) and wouldn't mind sharing there knowledge, this bald guy would appreciate it. thanks again.

travin