Assembly Language???

[williB]

Re: here is ...

Amady here is the program and the circuit that i am using..it is working perfectly..so u try it and letme know...
from here you can get the software and the sys file ..if u r using windows XP or NT...If u need to view a picture of the working programmer here is the link.
**broken link removed**

that is a real nice circuit ..what did you use to draw it .??

 

[techknow]

I need help

hey guys did anyone interface HT9202G to a pic16f628...cause i am trying to make a DTMF dialer...i have some difficulty to write the code. hope u guys will help me .

 

[techknow]

hey willib

Hello willib..so u like it..i drew it on protel (the latest professional circuit drawing software) it very easy..and the best part is all the compornent library is there and PCB also can be draw to the scale..hope for more from u

 

[williB]

have you got a link to the pdf for HT9202G ?

 

[samcheetah]

Re: I need help

hey guys did anyone interface HT9202G to a pic16f628...cause i am trying to make a DTMF dialer...i have some difficulty to write the code. hope u guys will help me .

ive always wanted to build a DTMF dialer with a PIC. but i havent had enough time and the knowledge of building one. can you give more info on DTMF dialers. and have u seen a good DTMF project (based on a PIC) on the net ??

 

[techknow]

hi willib

hello willibi here is the link to HT9202G.pdf
www.alldatasheet.com/datasheet-pdf/pdf/HOLTEK/HT9202G.html
i am realy in need of a guy who can help me to make this work...it work with a keypad but the difficulty is when i connect it to a pic it does not..so hope for a solution

 

[techknow]

hi samcheetah

hello samcheetah. i am trying to make HT9202G works with pic16f628 but still it did not. the difficult part is its very difficult to get an DTMF IC which can interface to pic. But i have seen another cool ic from holtek it is HT9200A and HT9200B these two ic's can be interface to a microcontroller like pic and etc...and u can get data sheet from
https://www.alldatasheet.com/datasheet-pdf/pdf/HOLTEK/HT9200B.html

This DTMF ic is very easy to interface to microcontroller...by serialy and parallel..but i could not get from my region...
i am in maldives which is located in indian ocean and i face lots of difficulties to get compornents..i got HT9202G from a telephone. I think it is an general DTMF dialer ic which everyone use for phone applications..
hope a good news from u..

 

[Nigel Goodwin]

Re: hi willib

hello willibi here is the link to HT9202G.pdf
www.alldatasheet.com/datasheet-pdf/pdf/HOLTEK/HT9202G.html
i am realy in need of a guy who can help me to make this work...it work with a keypad but the difficulty is when i connect it to a pic it does not..so hope for a solution

Your problem is that the HT9202G is designed for a multiplexed keypad, so you can't simply connect the PIC to it - you need free-floating switches to feed the HT9202G.

The simplest way would be to use small DIL relays fed from the PIC, one for each button - rather crude, but it would work.

 

[techknow]

hi Nigel Goodwin

hello Nigel Goodwin...thanks for the hint..
i thought insted of relays i can use CD4066 indeed it is an CMOS QUAD BILATERAL SWITCH it will work with PIC ,which is the voltage level is compatible. relays makes more sound anyway thanks for all that.
https://www.alldatasheet.com/datasheet-pdf/pdf/TI/CD4066.html
can u give me an DTMF ic which can get easyly but it should be interface with PIC

 

[williB]

found one.. !!

**broken link removed**

 

[alamy]

ive always wanted to build a DTMF dialer with a PIC. but i havent had enough time and the knowledge of building one. can you give more info on DTMF dialers. and have u seen a good DTMF project (based on a PIC) on the net ??

maybe this group can help you...

https://groups.yahoo.com/group/rat_ring/

 

[techknow]

DTMF

ive always wanted to build a DTMF dialer with a PIC. but i havent had enough time and the knowledge of building one. can you give more info on DTMF dialers. and have u seen a good DTMF project (based on a PIC) on the net ??

Actually i dont make circuits basd on net projects..usually i see the datasheet of what i need to make and i design it for my ways...any way i also likes to make DTMF circuits but difficult part is to get an ic.. :cry:

 

[techknow]

thanks willib

hey i have seen the ic on net befor.**broken link removed**
but i could not get it from anyware...do u know any product which has that ic..so that it will be more easy for me...if u know a place that i can get it. let me know the link...thanks

 

[techknow]

help wanted

i am having very much difficulties to use these instructions...
ADDLW , ADDWF ,ANDLW ,ANDWF ,SUBLW ,XOR........these things ...i spent lots of time to study these instructions ..still could not fixed on my mind like others...so could anyone tell me some easy ways to learn these and some easy examples other than mikroelektronika's pdf..
so pls get me an easyway to lunderstand these instructions..thank u guys for helping me..in advance...

 

[Nigel Goodwin]

Re: help wanted

i am having very much difficulties to use these instructions...
ADDLW , ADDWF ,ANDLW ,ANDWF ,SUBLW ,XOR........these things ...i spent lots of time to study these instructions ..still could not fixed on my mind like others...so could anyone tell me some easy ways to learn these and some easy examples other than mikroelektronika's pdf..
so pls get me an easyway to lunderstand these instructions..thank u guys for helping me..in advance...

They are all explained in the datasheet (and in the MPASM helpfile), but for an example:

ADDLW is 'ADD Literal to W, it simply adds the literal value after the instruction to the W register - it's not very complicated?.

ADDWF adds a file (GPR) and the W register, the result can go to either the GPR or W, depending on the suffix at the end of the instruction (,W or ,F).

 

[techknow]

Little difficulty

i have interface two 7segment displays to a PIC16F628 and it was working fine. **broken link removed** here is the link in my forum to view it...from the code u can see the data to the segment is send separatly

segdata
call display1on ;set RA0 high( first display)
movlw 0x66 ; make pins high (b'11001100')
movwf portb ;of port b
call display1off ;set RA0 low
clrf portb ;clear portb
call display2on ;set RA1 high (second display)
movlw 0x07 ;make pins high (b'00000111')
movwf portb ;of port b
call display2off ;set RA1 low
clrf portb ;clear portb
goto segdatab ;again start

to first segment

call display1on ;set RA0 high( first display)
movlw 0x66 ; make pins high (b'11001100')
movwf portb ;of port b
call display1off ;set RA0 low
clrf portb

to second segment

call display2on ;set RA1 high (second display)
movlw 0x07 ;make pins high (b'00000111')
movwf portb ;of port b
call display2off ;set RA1 low
clrf portb

so i need a code which will be very easy .....like this example below

MOVLW       .21
         MOVWF       SEGMENTS

WHEN I USE THIS COMAND IT SHOULD "2" ON 1st SEGMANT AND "1" ON 2nd SEGMANT...so we can see "21" ......if there is aneasy way to modify my code let me know ...[/code][/quote]

 

[Nigel Goodwin]

I suggest you look at my seven segment display tutorial, it multiplexes two seven segment LED's using a 16F628 - it uses a lookup table to convert from numbers to the correct segments.

 

[techknow]

pic16f628

thank u for reminding me the link...hey i have tried you LCD code but i am having some difficulties i dot' know where t o connect the D4,D5,D6 AND D7.. and W/R,E ..etc so could u led me the circuit dagram to interface LCD to pic in 4bit mode

 

[Nigel Goodwin]

Re: pic16f628

thank u for reminding me the link...hey i have tried you LCD code but i am having some difficulties i dot' know where t o connect the D4,D5,D6 AND D7.. and W/R,E ..etc so could u led me the circuit dagram to interface LCD to pic in 4bit mode

The tutorials give all that information, the hardware pages give circuits and veroboard layouts.

 

[techknow]

thanks

thanks again...heheh i am dummm :lol: