Audio (voice) - Stock 9X PCB

[C.João]

Hi flaps30. I had a problem like your on my sound module. can you scope around the SD card lines ?

my problem was simple. when I removed the SD-card holder (to get it else were) I "lost" the sound module. it seems that the ground line uses the SD-card holder as a jumper...

either you have a dead solder joint or any other problem... probe around the sd-card lines and report back

[thomas9x]

The SD card is loaded with the sound files from here.. So far no joy on getting any audio output.

1. The SD card should be 2GB or less (a cheap 1GB card is fine). It must be formatted for legacy FAT16; Larger capacity cards will default to FAT32 (sound module won't like FAT32). So double check your formatting.
2. The sound file numbers must match the 9X software version you are using. Don't assume anything, check to see you have the correct sound files (again).

The backlight works, but I don't see anything that could be called clock pulses on PB7.

If your 9X is correctly operating the backlight from the HC574 pin 17 then this means the PB7 clock is working. Don't assume the LED control is working 100% correct -- double check that the 9X has FULL backlight control using the various 9X backlight menu settings.

What should we see on pin 14 & 15 on the 574? Both of them are high all the time.

These two signals spend almost all of their time as logic high signals (3.3V). Because of their low duty rate, observing them will be difficult with an analog scope. Use a digital (storage) scope and set the trigger for rising edge on HC574 pin-19. At each new speech sentence there will be 16 clocks (125uS each) on pin 19.

Pin-18 is the data signal (which is latched at the rising edge of each pin-19 clock). During the clocking period data will be mostly logic low with occasional logic highs. for example, file 0101.wav would have a data sequence of 0000000100000001.

I do see packets of pulses on LCD D0,1,2 & D3.

LCD0 - LCD3 are very busy, but the data seen here is mostly (99.9% of the time) for the LCD. At the rising edge of PB7, whatever is on LCD0-LCD3 is latched on the HC574. This activity will probably require a digital scope to see it.

What should appear on the busy line (P06) from the sound module?

Successful communication will cause the MP3 module's Pin-13 (busy) to go logic high for the duration of the speech sentence. The recorded sounds are short so this signal will be logic high for less than 1 or 2 seconds at a time.

Question - Does the SD card need any label?

My card's volume name is Voice9X. But I doubt that any name is needed.


If I had to guess, I would say your hardware might be fine. My gut feeling is you may have a problem with the SD card (wrong files or wrong formatting) or a menu setup issue. So start there before diving back into your hardware.

- Thomas

[Flaps 30]

Thanks for the detailed reply Thomas. Very useful stuff there.

My SD card is an ancient 512 Mb unit that is formatted to FAT 16. So that is a box ticked.

Yes the backlight is working with all the different settings. Another box ticked.

Having set up the throttle switch as per the guide. Things have changed slightly for the good.

574 - Pin 14 CLK (P05) toggles high and low depending upon throttle switch.

574 - Pin 15 Data (P04) Is high normally. I do see a burst of data (my scope is a normal one) on switch transition.

SPKR + & - Small positive pulse (2 Volt) appears on both on switch transition

P06 Busy line stays low regardless of any of the above.

Trish

Edit - I noticed that the module I have happens to be a WTV020 - SD 20SS. Looking at the ebay site where I bought it. It seems they ship the MP3 version by default. ----> http://www.ebay.co.uk/itm/MP3-SD-Card-S ... 3f0a7bf704 Perhaps that is the problem?

João - This is a new transmitter that is clean. So I will look at your settings..

[jhsa]

Trish, I don't know if you have models already loaded in your radio, but if you want you can try to load my eeprom. it has all the correct settings for the audio.. if it doesn't work then you can rule the settings out

João

[Crucial]

If you have more sd cards try some another ones. I had to try 3 different cards before I found one that would work.

[thomas9x]

My SD card is an ancient 512 Mb unit that is formatted to FAT 16. So that is a box ticked.
Yes the backlight is working with all the different settings. Another box ticked.
Having set up the throttle switch as per the guide. Things have changed slightly for the good.
574 - Pin 14 CLK (P05) toggles high and low depending upon throttle switch.
574 - Pin 15 Data (P04) Is high normally. I do see a burst of data (my scope is a normal one) on switch transition.
SPKR + & - Small positive pulse (2 Volt) appears on both on switch transition
P06 Busy line stays low regardless of any of the above.

I could be wrong, but my gut feeling says that the HC574 voice interface is fine. Top on the suspect list is your SD card. It would be worth your effort to borrow a 1GB card, do a fresh FAT16 format, and reload the sound files.

I noticed that the module I have happens to be a WTV020 - SD 20SS.

Both of mine are silk-screened like that too. But I would not be surprised to find that all the MP3 module variants have the same part number.

- Thomas

[argo]

+1 on SD card problems. It took two cards for me to find success and I still find files truncate unless I overwrite all files every change. Module seems to be fussy with respect to cards.
Cheers.

[jhsa]

that's what i do everytime i write to the SD card. Maybe that is the reason i never had problems.

[bill516]

If you did not specify a two line serial module then you will have got the mp3 module, I did the same when I ordered mine. When I got the right one the only way to tell the difference was there was 1_1 on the rear of the board.

[jhsa]

Yeah, I've got a second module on the way.. I asked for the 2 line serial control module and specified that I want the 20 pin one (I wrote the reference, which I don't remember now), and asked them to mail me back confirming that they sent the one I wanted, which they did.. so, fingers crossed. They do ship very fast..

João

[Flaps 30]

Having had a decent sleep on this issue. I tend to agree with others, that the basic system is working, and that the fault is with the SD module being the incorrect one.

Looking at the Ebay listingt for the card. They say "WTV020-SD module is a voice-rewritable voice modules with maximum storage capacity up to 1GB SD card memory. It supports WAV and AD4 audio format.

WTV020-SD voice module adopts WTV020SD-20S as core procesing chip. It supports MP3 control mode, key control models (3-voice and 5-voice),pwer control mode or two-line serial control mode . Control mode is set while producing, which can not be changed through configuring."

So I'm guessing that I need to specify the WTV020-SD rather than the WTV020SD-20S. How have others gone about ordering the correct unit?

Trish

[jhsa]

You have to ask for the WTV020SD-20SS with two-line serial control mode.. and ask them to confirm back..

João

[Flaps 30]

Ohh! ... Okay.. I will do that, although I would have thought that ordering the SD version rather than the 20S version would be the way forward. It's a bit sad that the supplier should have lumped both types together, whilst being vague (to my mind) as to which to order. Just a little rantette there

Trish

[bill516]

No problem having a rant I felt the same, I scoured the data sheets to see what the difference is between the two modules but could not find anything, even comparing the two side by side when I got my correct one. All the connection diagrams are virtually all the same with only minor changes like capacitors and stuff. What seems strange to me though is why make two different modules with the same name and number with some obscure identification on it, if the chip had a different ident then would be something. Maybe its the China being unscroupable unscroupabable devious.

[jhsa]

Yeah, they hope that you buy the wrong one so you have to buy twice.. But then, why would they state at their internet site that we must say which one we want otherwise they will ship the default so called mp3 player that doesn't even play mp3
They do warn us..
On the internet page (I bought from their ebay shop) they even have a drop down box where you can choose the version you want..

João

[C.João]

I'm try to email them about the possibility to change the module's mode of work (mp3 / 3 data lines). I did that before and they even seem to track orders "back" (when I asked them which module they sen't me.)

with no change on the module, with no reference on the module... it could be a fw config... a couple of bytes sent into the chip or something...

[jhsa]

So, they probably program the module after you order it?

[bill516]

That would be nice then I could use this module thats sat collecting dust in my, ahem spares box. Ah but then I would have a module that works a stripboard that works and nothing to put it in, hm I might have to buy another TX wonder what the wife will say.

[MikeB]

Mine said "E R 9 X" into the microphone

Mike.

[C.João]

So, they probably program the module after you order it?

probably yes. it surely seems right to me...

of course I will sell the information for high costs since my keystrokes cost a lot of money

[impeeza]

Hi, anybody has tried use the internal +5V and + 3.3V power supply spots? this way you will avoid use six electronic components. there is any reason for not use internal voltage regulators? amp restrictions? by the way, anybody has been tried this module: http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0860428730 ? this module seems to be the same module but using micro SD regards.

[hageha]

look at this
viewtopic.php?f=5&t=948&start=900
and my post one page back
viewtopic.php?f=5&t=948&start=1331
Hans

[Kilrah]

there is any reason for not use internal voltage regulators?

Yep, they won't be able to supply enough current / will overheat.

by the way, anybody has been tried this module: http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0860428730 ? this module seems to be the same module but using micro SD regards.

The microSD version unfortunately doesn't behave exactly the same. It has a very slow response time.

[HC1969]

I do not understand, both located inside the same ICs!

[jhsa]

This seems to be the 16 pin version of the chip.. "Mini SD Card MP3 Sound Module For PIC Arduino WTV020-SD-16P "

Maybe that would make a difference??

[HC1969]

No, both of IC WTV020SD-20S. Please see:
http://www.emartee.com/Attachment.php?name=41928.pdf (page 19).
this is no difference.

I think it will be the following error:



This is supposed to control.

[MikeB]

From r774, the timing has been changed.

Mike.

[HC1969]

From r774, the timing has been changed.

Mike.

Thanks!!!

[HC1969]

I read your description to P02, P03 and P07 control input serial data soon! These inputs are floating on the drawings.
They should not be problematic?????
Description page 22 (section 8.9)

Sufficient internal pull-up resistors?
I try 3V3 pull up fix....

[impeeza]

looking in the micro sd and full sd versions (20D & 16SP) the only difference i can find is the micro sd only can use 128mb card but if both circuits uses the same chip how can this be true?