isd4002 problems help required please

[khoog]

Hi Nick,

I used the SETPLAY command (%11100000) instead of PLAY (%11110000). It went something like this:

CmdPlay VAR WORD
CmdPwrUp CON %0010000

SHIFTOUT MOSI, SCLK, 0, [CmdPwrUp\8]
HIGH SS
PAUSE 20
LOW SS

CmdPlay = %111000010001011 'SETPLAY + address
SHIFTOUT MOSI, SCLK, 0, [CmdPlay\16]
HIGH SS

Klaus

[Agent36]

Hi Klaus,

Thanks for the code example, I have checked the code and I am using set_play (11100000). The problem I have is reading in the play address using 4 bits on porta and then looking it up in the array. I have included the full code in notepad if you want to look at it. I dont think my 1st post was very clear.

I am going to keep your code sample and play with it once I get this working

thanks again
Nick

[charudatt]

Hi Nick,

Can you share the code once done. I have a similar chip APR6016 to play with.

Thanks for the start code.

regards

[BobK]

Hi Nick,

I haven't used a PIC in this manner but I think the line:
"TRISA = %00001111 'Bits 0-3 address select"
is wrong. TRISA sets the data direction for PortA.

Now if you had "TRISA = %00000000" then all of the lines of PortA are set as outputs. The next line should then be "PortA = %00001111".

This would then turn PortA 0 - 3 on and 4 - 7 off.

BobK

Sorry, I didn't look at the date of the original post!

[Agent36]

Hi BobK,

PortA bits 0-3 are for a binary switch; they set the play address for the isd4002.

charudatt,
I have worked out all the problems myself, now it stores the address to eeprom and can be selected via the binary switch using a lookup table. Is this what you are after? Contact me via email in my personal info and I will send you the completed code.

Regards
Nick

[Agent36]

Hi BobK,

PortA bits 0-3 are for a binary switch; they set the play address for the isd4002.

charudatt,
I have worked out all the problems myself, now it stores the address to eeprom and can be selected via the binary switch using a lookup table. Is this what you are after? Contact me via email in my personal info and I will send you the completed code.

Regards
Nick

[charudatt]

Hi Nick,

Sent You A Pm Some Days Back. Don't Know If You Got It.

Regards
Charudatt

[charudatt]

JUST IN CASE IF SOME ONE WAS INTERESTED, I HAVE A SIMILAR PROJECT USING APR6016 IC.

THIS CONNECTS TO A DEVELOPMENT BOARD FOR CONTROL.

APR6016 IS MANUFACTURED BY APLUS AND THE DATASHEET CAN BE FOUND AT http://www.aplusinc.com.tw/data/reco...et/apr6016.zip

REGARDS