A time and temperature talking device project

[keeble]

Hi,
I am keeble and I am doing a a time and temperature talking device. It can display both time and temperature too. So does it can produce sound. My project is almost done except it cannot produce sound. It can only display. I am tired of troubleshooting both hardware devices and prgramming codes. All the things work except it cannot produce sound. Can you help me please? I am using CCSC compiler for my project. THe following are the devices I used.
DS1307( Real time clock)
DS1620 ( thermometer chip)
SLED4C
EMIC (Text to speech module)
PIC16F876A

The programming codes and schematics can be easily obtained from the following website.
http://www.rentron.com/CCS_C/SERLED_C.htm.
Please help me. Thank you.

[Bruce]

Make sure you have the EMIC DIP switch set to receive commands in ASCII format.

[keeble]

Is there any setting has to be made in order to work EMIC? Actually I have connected components according to the given circuit and programmed it all the same accroding the the codes available on the site. I did not do anything. Will you plase tell me how to set the EMIC dip switch because i am really new for those stuffs. In the EMIC, it's said if switch 1 is set to on, it will command to ASCII format but I dunno how to set SW1 on. Is it at the programming or hardwared device itself? I did not see any physical switch at the EMIC. Will you please help me? Thank you.

Keeble

[Bruce]

Do you have the EMIC data sheet?

If you don't, I recommend you download a copy. http://www.parallax.com/dl/docs/prod...micModules.pdf

Unless you have a newer model EMIC, that doesn't have the switch, it should have a 2-position DIP switch
located just below the Winbond IC.

Just like the one shown in this photo below towards the center of the Winbond IC.
http://www.parallax.com/images/prod_jpg/30006.jpg

These are labeled 1 and 2 on the DIP switch. Move 1 to the ON position (up).

Page #5 in the data sheet covers the DIP switch.

[keeble]

As per given suggestion, I have set the EMIC DIP sw1 to ON. But still the EMIC device is unable to produce the sound. Do you think is there any other reason?

[Bruce]

Since this forum is for PicBasic, here's a simple test routine to check out the EMIC module.

DEFINE OSC 20

' -----[ I/O Definitions ]---------------------------

Tx    VAR PORTC.0   ' wire to EMIC sin pin
Busy  VAR PORTC.2   ' wire to EMIC busy pin
Rst   VAR PORTC.1   ' wire to EMIC reset pin

' -----[ Constants ]---------------------------------

BAUD            CON     0  ' T2400
Yes             CON     1

' -----[ Initialization ]----------------------------
  TRISC = %000010100
  
Setup:
  GOSUB Hard_Reset                 ' restore defaults
  PAUSE 1000
  SEROUT TX, Baud, ["volume=7;"]   ' max volume
  GOSUB Check_Busy
  SEROUT TX, Baud, ["pitch=1;"]    ' adjust voice pitch
  GOSUB Check_Busy
  SEROUT TX, Baud, ["speed=1;"]    ' set speech speed
  GOSUB Check_Busy
  
Talk:
  SEROUT TX,Baud,["say= I should be using pick basic pro;"] 
  GOSUB Check_Busy    ' wait for busy to release
  PAUSE 10000         ' long pause between message
  GOTO Talk

' -----[ Subroutines ]---------------------------------
' -- wait until Busy line released by Emic

Check_Busy:
  PAUSE 5                      ' allow busy time to activate
  WHILE Busy = Yes : WEND      ' wait until not busy
  RETURN
    
' Hard reset
' -- good when comm link is lost

Hard_Reset:                      ' reset to default values
  LOW Rst                        ' pull reset line low
  PAUSEUS 200                    ' 200uS pause
  INPUT Rst                      ' let reset float

  RETURN

I've included the .hex file here for you. Wire your 16F876A to the EMIC as shown in the I/O
Definitions section, and program it with the .hex file attached.

If it doesn't work, then you may have a damaged EMIC module, bad speaker, or something
isn't wired properly. If it does work, let me know.