Pic+isd4002

[eyalf]

hi fellows,

i'm new to this forum, and thank you for being there.
before i elaborate more,
has anyone wokred with the PIC as a controller of the ISD4002 (or of the 4000 series) chipcorder? if so, can i verify the I/O pind between the two devices with you?

thanks, and a very merry xmas,

eyal.

[mister_e]

For sure you can, simply post the exact things you're looking for

[eyalf]

hi Steve,

thanx for the reply.

so:
as far as i can tell, connection-wise, there should be 4 pins connecting the PIC and the chipcorder.

from the PIC: RB4/5/6/7 (pins # 10-13).
from the ISD: SS, SCLK, MOSI, MISO (pins # 1,2,3, 28).

could you (or anyone else) verify that from your knowledge or experience?

also, the non-programmer that i am, I want to use JAL to do the coding. I've used it sporadically before, but never with the microcontroller AND a sound chip. would anyone have suggestions/shortcuts/no-no's before i sink in?

thanks again, and try to stay in high places :-O
eyal.

[mister_e]

Your pinout can be almost everything ther since i don't know wich PIC you'll be using for this project.

The important part for the code... JAL... i don't know that, never heard about it, so i can't help with anything on that.

I, and most here, use Melabs PICBASIC PRO v2.45.

BUT i've some ISD4002 somewhere here under the dust. I buy those several years ago and i think it's now the time for me to give a try with them. I'll let you know when something will work.

[eyalf]

thanks Steve,

the pic i'm using is the 16f876. JAL (Just Another Language) is a cute little Assembler-based code and compiler.
try http://www.voti.nl/jal/. I just never tried it with a chipcorder.

[mister_e]

i just have a really fast look to this. Try to find something in JAL who can gives you SPI or Microwire protocol read/write. That's all i can tell you for now. BTW i'm begining in a few hours some code line to do some playback/record from this chip.

You can give a try with the free PBP compiler on http://www.compilespot.com/startdemo.htm too.

i agree it's a bit limited, but that way, everybody here will be able to help you for your project.

[eyalf]

I'll try, Steve, thanx.

[julioelectronic]

i need a correct interface to connect 16f877a and isd4002

[mister_e]

Just a teaser. I'll not post the whole thing, just the pin assignement.

    ' LCD definition
    ' ==============
    ' 
    DEFINE LCD_DREG PORTA  ' 
    DEFINE LCD_DBIT 0      ' LCD data port : PORTA<3:0>
                           '
    DEFINE LCD_EREG PORTA  ' 
    DEFINE LCD_EBIT 6      ' LCD enable bit : PORTA.6
                           '
    DEFINE LCD_RSREG PORTA ' 
    DEFINE LCD_RSBIT 7     ' LCD RS bit : PORTA.7


    ' I/O Definition
    ' ===============
    '
    TRISA = %00110000    ' PORTA Output on :
                         '         PORTA<3:0> : LCD data 
                         '         PORTA<7:6> : LCD RS & E bit
                         '
                         ' PORTA Input on :
                         '         PORTA.4 : "ALT PLAY" Button
                         '         PORTA.5 : "PLAY" button    
                         '
    TRISB = %11110001    ' PORTB Output on : 
                         '         PORTB.1 : ISD4002 SS pin 
                         '         PORTB.2 : ISD4002 SCLK pin 
                         '         PORTB.3 : ISD4002 MOSI pin
                         '
                         ' PORTB Input on :
                         '         PORTB.0 : ISD4002 INT pin
                         '         PORTB.4 : ISD4002 MISO pin
                         '         PORTB.5 : ISD4002 RAC pin
                         '         PORTB.6 : "SETUP" button
                         '         PORTB.7 : "RECORD" button
    OPTION_REG.7 = 0     ' enable pull-up on PORTB
    CMCON = 7            ' disable analog comparator
    
    
    ' Variable definition
    ' ===================
    '
    AltPlay              var PORTA.4 ' "ALT PLAY" button
    Play                 var PORTA.5 ' "PLAY" button
    Setup                var PORTB.6 ' "SETUP" button
    Record               var PORTB.7 ' "RECORD" button
    INT                  var PORTB.0 ' ISD4002 INT pin
    SS                   var PORTB.1 ' ISD4002 SS pin
    SCLK                 var PORTB.2 ' ISD4002 SCLK pin
    MOSI                 var PORTB.3 ' ISD4002 MOSI pin
    MISO                 var PORTB.4 ' ISD4002 MISO pin
    RAC                  var PORTB.5 ' ISD4002 RAC pin

Was setup on 16F628, you'll need to use SHIFTIN/SHIFTOUT

[anderson037]

The melabs LAB-XT board has a socket for this family of ISD chip. You can download the schematic and sample code:

http://melabs.com/products/labxt.htm

[julioelectronic]

I watch the circuit that you recommended to me anderson , but the only thing that my circuit do, are sounds when pic send the pulses to isd, good i will continue treating, thanks for the help.

[angie14]

currently I made the next circuit

i found in this page http://hem.passagen.se/communication/speach.html
and I find the next firm for the pic

#include <REGX52.H>

#include <string.h>

#include <stdio.h>

#include <absacc.h>

#include <intrins.h>

sbit ss=P1^0;

sbit mosi=P1^1;

sbit sclk=P1^4;

void delay_ms(unsigned int ms)

{

unsigned char i;

while(ms--)

{

i=112;

while(i--);

}

}

void spi_mosi(unsigned char spi_data)

{

unsigned char BitCnt;

mosi=0;

sclk=0;

for(BitCnt=0;BitCnt<8;BitCnt++)

{

sclk=0;

_nop_();

if((spi_data>>BitCnt)&0x01)

mosi=1;

else

mosi=0;

_nop_();

_nop_();

_nop_();

sclk=1;

_nop_();

_nop_();

_nop_();

}

_nop_();

_nop_();

_nop_();

}

void play_isd4002(unsigned int addr)

{

unsigned char addr_l,addr_h;

addr_l=addr;

addr_h=addr>>8;

addr_h=addr_h|0xe0;

ss=0;

spi_mosi(0x20);

ss=1;

delay_ms(50);

ss=0;

spi_mosi(addr_l);

spi_mosi(addr_h);

ss=1;

delay_ms(10);

ss=0;

spi_mosi(0xf0);

ss=1;

}

void stop_isd4002()

{

ss=0;

spi_mosi(0x70);

ss=1;

delay_ms(50);

}

void main()

{

play_isd4002(0x86);

}

but i can't record the file... so I need a correct configuration for the ISD4002 ...thanks