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Atom058
- 21st August 2009, 22:13
Hello - I have started playing with an ISD4002 and have a working circuit and program. If I just want to record a message using the REC command and then play it back using the PLAY command, everything works fine. However, when trying to specify the address to start recording and playback (using SETREC and SETPLAY), I get nothing. I have poured through the forum and the spec sheet, but I can't seem to find out what I'm doing wrong. I would like to be able to record 2 different messages on the ISD chip and be able to chose which one to play back. I am using a PIC16LF628A chip and V2.5 PBP. Any insight would be appreciated. Thanks! Here is my code:


@ DEVICE HS_OSC ; Hi Speed Osc
@ DEVICE WDT_ON ; Enable Watch dog timer
@ DEVICE PWRT_ON ; Disable MCLR pin
@ DEVICE MCLR_OFF ; Enable Power-up timer
@ DEVICE BOD_OFF ; Enable Brown-out detect
@ DEVICE CPD_OFF ; Code Protect Off
@ DEVICE PROTECT_OFF ; EEPROM Protect Off

include "ModeDefs.bas"
DEFINE OSC 20

' I/O Definition
' ===============
'
TRISA = %00001100 ' PORTA Output on :
' PORTA.0 : Record LED
' PORTA.1 : Play Led
'
' PORTA Input on :
' PORTA.2 : "ALT PLAY" Button
' PORTA.3 : "PLAY" button
'
TRISB = %01111001 ' PORTB Output on :
' PORTB.1 : ISD4002 SS pin
' PORTB.2 : ISD4002 SCLK pin
' PORTB.7 : ISD4002 MOSI pin
'
' PORTB Input on :
' PORTB.0 : ISD4002 INT pin
' PORTB.5 : ISD4002 MISO pin
' PORTB.6 : ISD4002 RAC pin
' PORTB.3 : "SETUP" button
' PORTB.4 : "RECORD" button

OPTION_REG.7 = 0 ' enable pull-up on PORTB
CMCON = 7 ' disable analog comparator

' Variable definition
' ===================
'
RecordLED var PORTA.0
PlayLED var PORTA.1
AltPlayBtn var PORTA.2 ' "ALT PLAY" button
PlayBtn var PORTA.3 ' "PLAY" button
StopBtn var PORTB.3 ' "STOP" button
RecordBtn var PORTB.4 ' "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.7 ' ISD4002 MOSI pin
MISO var PORTB.5 ' ISD4002 MISO pin
RAC var PORTB.6 ' ISD4002 RAC pin

' ISD4002 Control Values:
' bits 0, 1 & 2 are actually bits 9, 10 & 11 of address
CmdPwrUp con $20 '%00100000 Power up the device
CmdPlay con $F0 '%11110000 Start playback
CmdRec con $B0 '%10110000 Start recording
CmdStop con $30 '%00110000 Stop current operation
CmdStopPwrDn con $10 '%00010000 Stop playback or record and power down
CmdSetPlay CON $70 '%11100000 Set the playback address
CmdSetRec CON $A0 '%10100000 Set the record address

ISDAddress var word

'************************************************* ***************
Pause 1000
high PlayLed
HIgh RecordLED
pause 500
low PlayLed
Low recordled

Start: 'scan buttons
if Recordbtn = 1 then
high recordLED
pause 250
gosub RecordAudio
low RecordLED
endif

if PlayBtn = 1 then
high PlayLED
pause 250
gosub PlayBack
low PlayLED
endif
goto Start

'************************************************* ***************
RecordAudio: ' Record message
LOW SS 'Select isd4002
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdPwrUp\8]
HIGH SS 'De-Select isd4002
PAUSE 25

LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdPwrUp\8]
HIGH SS
PAUSE 50

'start recording at address 0
ISDAddress.lowbyte = %00000001
ISDAddress.Highbyte = CmdsetRec
'ISDAddress = 10100000 00000001

LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[ISDAddress\16]
HIGH SS

Wait4Stop:
if StopBtn = 0 then goto Wait4Stop
gosub StopOp 'Issue Stop Operation cmd
return

'************************************************* ***************
PlayBack: ' Play Audio
LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdPwrUp\8]
HIGH SS
PAUSE 25

'start playback from address 0
ISDAddress.lowbyte = %00000001
ISDAddress.Highbyte = CmdsetPlay

LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[ISDAddress\16] 'Start Playback
HIGH SS
pause 25

Wait4Done:
if int = 1 or StopBtn = 1 then goto wait4done
gosub StopPwrDn
return

'************************************************* ***************
StopPwrDn: ' Reset ISDInt and power down cmd
LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdStopPwrDn\8]
HIGH SS
pause 20
return

'************************************************* ***************
StopOp: ' Stop Operation
LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdStop\8]
HIGH SS
pause 20
return

'************************************************* ***************
end
Atom058
- 23rd August 2009, 23:42
Well, I figured out my problem. I had the wrong value for SetPlay. Once I found that, everything worked fine. Here is the updated code:


@ DEVICE HS_OSC ; Hi Speed Osc
@ DEVICE WDT_ON ; Enable Watch dog timer
@ DEVICE PWRT_ON ; Disable MCLR pin
@ DEVICE MCLR_OFF ; Enable Power-up timer
@ DEVICE BOD_OFF ; Enable Brown-out detect
@ DEVICE CPD_OFF ; Code Protect Off
@ DEVICE PROTECT_OFF ; EEPROM Protect Off

include "ModeDefs.bas"
DEFINE OSC 20

' I/O Definition
' ===============
'
TRISA = %00001100 ' PORTA Output on :
' PORTA.0 : Record LED
' PORTA.1 : Play Led
'
' PORTA Input on :
' PORTA.2 : "ALT PLAY" Button
' PORTA.3 : "PLAY" button
'
TRISB = %01111001 ' PORTB Output on :
' PORTB.1 : ISD4002 SS pin
' PORTB.2 : ISD4002 SCLK pin
' PORTB.7 : ISD4002 MOSI pin
'
' PORTB Input on :
' PORTB.0 : ISD4002 INT pin
' PORTB.5 : ISD4002 MISO pin
' PORTB.6 : ISD4002 RAC pin
' PORTB.3 : "SETUP" button
' PORTB.4 : "RECORD" button

OPTION_REG.7 = 0 ' enable pull-up on PORTB
CMCON = 7 ' disable analog comparator

' Variable definition
' ===================
'
RecordLED var PORTA.0
PlayLED var PORTA.1
AltPlayBtn var PORTA.2 ' "ALT PLAY" button
PlayBtn var PORTA.3 ' "PLAY" button
StopBtn var PORTB.3 ' "STOP" button
RecordBtn var PORTB.4 ' "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.7 ' ISD4002 MOSI pin
MISO var PORTB.5 ' ISD4002 MISO pin
RAC var PORTB.6 ' ISD4002 RAC pin

' ISD4002 Control Values:
' bits 0, 1 & 2 are actually bits 9, 10 & 11 of address
' CCCCCAAA
' 43210119
' 10
CmdPwrUp con $20 '%00100000 Power up the device
CmdPlay con $F0 '%11110000 Start playback
CmdRec con $B0 '%10110000 Start recording
CmdStop con $30 '%00110000 Stop current operation
CmdStopPwrDn con $10 '%00010000 Stop playback or record and power down
CmdSetPlay CON $E0 '%11100000 Set the playback address
CmdSetRec CON $A0 '%10100000 Set the record address

ISDAddress var word

'************************************************* ***************
Pause 500
high PlayLed
HIgh RecordLED
pause 500
low PlayLed
Low recordled

Start: 'scan buttons
if Recordbtn = 1 then
high recordLED
pause 250
gosub RecordAudio
low RecordLED
endif

if PlayBtn = 1 then
high PlayLED
pause 250
gosub PlayBack
low PlayLED
endif
goto Start

'************************************************* ***************
RecordAudio: ' Record message
LOW SS 'Select isd4002
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdPwrUp\8]
HIGH SS 'De-Select isd4002
PAUSE 25

LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdPwrUp\8]
HIGH SS
PAUSE 50

'There are 600 memory blocks in the 4002. Each block is 200 mS long.
'start recording at address 16 (= $10, %00010000)
' this is 3.2 seconds in (200 mS/address) 16*0.200 = 3.2
ISDAddress.lowbyte = $10
ISDAddress.Highbyte = CmdsetRec '(= $A0, %10100000)
'ISDAddress = $A010, %10100000 00010000

LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[ISDAddress\16]
HIGH SS

Wait4Stop:
if StopBtn = 0 then goto Wait4Stop
gosub StopOp 'Issue Stop Operation cmd
return

'************************************************* ***************
PlayBack: ' Play Audio
LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdPwrUp\8]
HIGH SS
PAUSE 25

'start playback from address 16 (=$10)
ISDAddress.lowbyte = $10
ISDAddress.Highbyte = CmdsetPlay '(=$E0)

LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[isdaddress\16] 'Start Playback
HIGH SS
pause 25

Wait4Done:
if int = 1 and StopBtn = 0 then goto wait4done
gosub StopPwrDn
return

'************************************************* ***************
StopPwrDn: ' Reset ISDInt and power down cmd
LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdStopPwrDn\8]
HIGH SS
pause 20
return

'************************************************* ***************
StopOp: ' Stop Operation
LOW SS
SHIFTOUT MOSI,SCLK,LSBFIRST,[CmdStop\8]
HIGH SS
pause 20
return

'************************************************* ***************
end