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Proteus run incorrect with SPI between 2 PIC18, help me !

 
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iVoVa



Joined: 12 Mar 2011
Posts: 7

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Proteus run incorrect with SPI between 2 PIC18, help me !
PostPosted: Mon Mar 14, 2011 1:17 pm     Reply with quote
Code:
#include<18F4520.h>
#use delay(clock=4000000)
#use FAST_IO(D)

void main()
{
   int number;

   setup_spi(SPI_MASTER );
   while(1)
   {
      number = input_D();
      spi_write(number);
   }
   
   
}



Code:
#include<18F4520.h>
#use delay(clock=4000000)
#use FAST_IO( D)


void main()
{
   int8 num;
   setup_spi(SPI_SLAVE );
   while(1)
   {
      num = spi_read();
      output_D(num);   
   }

}





PORTD of Slaver do not change when I change input to MASTER and it run incorrect.
Please help me. Thanks a lot.
temtronic



Joined: 01 Jul 2010
Posts: 9174
Location: Greensville,Ontario

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PostPosted: Mon Mar 14, 2011 2:22 pm     Reply with quote
hmmm... you're using fast_io() but where's your setup of the tris registers ?
Have you disabled other peripherals you don't use ?
Do you need a chip select for the slave ?
Your hardware for switch and LED is incomplete.
active high, active low ?
iVoVa



Joined: 12 Mar 2011
Posts: 7

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PostPosted: Tue Mar 15, 2011 3:55 am     Reply with quote
temtronic wrote:
hmmm... you're using fast_io() but where's your setup of the tris registers ?
Have you disabled other peripherals you don't use ?
Do you need a chip select for the slave ?
Your hardware for switch and LED is incomplete.
active high, active low ?


Thanks temtronic so much, i have solved problem, pin SS must be connected GND.
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