Sample Code ISD17XX

[ICQ34791919]

I can't to control ISD1790 by SPI interface.
I don't know why.

i send 0x40 to ISD1790 voice not responding but ISD1790 return value to PIC

any one have sample code


thanks.

reg.

[Orcino Borges]

Hi,

 I am developing a project that uses the ISD1730 and am not having success with SPI interface. Does anyone have any examples in C that can share ?

              Thanks i advance

[ICQ34791919]

Bit Riversal
exp data sent 1 2 3 4 5 6

bit riversal

6 5 4 3 2 1

and ISD Work

[kaizer]

i dont know how ISD17xx works..

but this is my Soft SPI routine which i used in my ISD4002

Code:

   #define POWERUP 0b0010000000000000
   #define SETPLAYMODE 0b1110000000000111
   #define PLAYBACK 0b1111000000000000
   #define SETREC 0b1010000000000111
   #define REC 0b1011000000000000
   #define STOP 0b0011000000000000
   
   #define DATAPIN  ra2
   #define DATAIN  ra3
   #define CLOCKPIN  rb5
   #define CSPIN rb4

void SendSPI(long cmd)
{
   unsigned char ctr;

   CSPIN=LOW; //chipselect activate
   delay_us(20);
   
   for(ctr=0;ctr<16;ctr++)
   {      
      DATAPIN=(Data>>(ctr)) & 0x01;
      delay_cycles(400);
      
      CLOCKPIN=HIGH;      
      delay_us(500);      
      CLOCKPIN=LOW;
      delay_us(500);
   }
      
   CSPIN=HIGH; //chipselect deactivate
   delay_us(1);
}

void SetPlay()
{
   SendSPIData(POWERUP);
   delay_ms(15);
   SendSPIData(SETPLAYMODE | Address);
}

void SetRecord()
{
   SendSPIData(POWERUP);
   delay_ms(15);   
   SendSPIData(POWERUP);
   delay_ms(25);
   SendSPIData(SETREC | Address);
}

hope this helps you=)