Problem with DS1620 + PIC16F887.

[sirbill]

Dear all,

I got a riddiculous problem with DS1620 and PIC 17F887. When I use PIC C Compier, the code I provided below work well, no problem. However, when I use MikroC, after I download the same code to 16F887, nothing happens. It seems that DS1620 does not work when I compile my code by MikroC. In my code, there is nothing special, just work with ports and that all. I wonder what I have to configure or something like that to make MikroC compile my code correctly.

Please help me, thank

//#include <16F887.h>
//#include <def_887.h>
//#fuses HS,WDT,NOPROTECT,NOLVP
//#use delay(clock = 12000000)
//#use fast_io (a)
//#use fast_io (b)
//#use fast_io (c)
//#use fast_io (d)
//#use fast_io (e)

//#bit DQ  = 0x08.7
//#bit CLK = 0x08.6
//#bit RST = 0x08.5
#define DQ   PORTA.F1
#define CLK  PORTA.F2
#define RST  PORTA.F3

int read_ds1620(void);
void write_ds1620(unsigned char data1);
void init_temp_ds1620(void);
int temperature, sign;

void main()
{
   TRISB = 0x00;
   init_temp_ds1620();
   while (1)
   {
   RST = 1;
   write_ds1620(0xAA);
   temperature = 0;
   temperature = read_ds1620();
   RST = 0;
   PORTB = temperature;
   //delay_ms(1000);
   }
}

int read_ds1620(void)
{
    int i = 0;
   TRISA = 0x02;
   temperature = 0;
   CLK = 1;
   for (i = 0; i <= 7; ++i)
   {
   CLK = 0;
   if (DQ == 1)
   temperature |= (1 << i);
   //temperature = (temperature << 1);
   CLK = 1;
   }
   CLK = 0;
   if (DQ == 1)
   sign = 1;
   else sign = 0;
   CLK = 1;
   return(temperature);
}

void write_ds1620(unsigned char data1)
{
           int i = 0;
   TRISA = 0x00;

   CLK = 1;
   for (i = 0; i <= 7; ++i)
   {
   DQ = (data1 & 0x01);
   CLK = 0;
   CLK = 1;
   data1 = (data1 >> 1);
   }
}

void init_temp_ds1620(void)
{
      RST = 1;                
      write_ds1620(0x0C);    
      write_ds1620(0x08);
      RST = 0;
      RST = 1;               
      write_ds1620(0xEE);    
      RST = 0;
}

 

[glenville12]

hello, I am trying with difficulty as well to read a ds1620 to a pic 18f14k50 ... I did notice in your init_temp-ds1620 function that the second write_ds1620(0x08) ... I can't find 0x08 in the datasheet ... shouldn't it be write 0x0C then 0x00 then EE?