spi2508.c

pic单片机于2508 的protues 仿真

///////////////////////////////////////////////////////////////////////////////
// MPLAB IDE V7.11 + CCS C3.18
// by zhongwei
// 2009/05/10
///////////////////////////////////////////////////////////////////////////////

#if defined(__PCH__)
#include <18F452.h>
#device *=8
#device adc=10
#opt 10
#use delay(clock = 4000000)
#fuses NOWDT,XT, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT
//#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
//#use i2c(Master,Fast,sda=PIN_C4,scl=PIN_C3)

#else
#include <16F877A.h>
#device *=16
#device adc=10
#use delay(clock = 4000000)
#fuses NOWDT,XT, NOPUT, NOPROTECT, NODEBUG, NOBROWNOUT, NOLVP, NOCPD, NOWRT
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
//#use i2c(Master,Fast,sda=PIN_C4,scl=PIN_C3)
#endIf
///////////////////////////////////////////////////////////////////////////////

#byte INTCON  = 0x0B//
#byte PIE1    = 0x8C
#byte PIR1    = 0x0C
#byte ADCON1  = 0x9F
#byte TRISA   = 0x85
#byte TRISC   = 0x87
#byte PORTC   = 0x07
#byte SSPBUF  = 0x13
#byte SSPCON  = 0x14
#byte SSPSTAT = 0x94

#bit SMP = SSPSTAT.7 //sample mode
#bit CKE = SSPSTAT.6//edge select
#bit BF  = SSPSTAT.0 //
#bit SSPEN = SSPCON.5
#bit CKP = SSPCON.4 //
#bit SSPIF = PIR1.3 //


#define CS        PIN_B2

#define sck       PIN_B3//soft
#define SDI       PIN_B4
#define SDO       PIN_B5

//instruction
#define I_wren    0x06
#define I_wrdi    0x04
#define I_rdsr    0x05
#define I_wrsr    0x01
#define I_read    0x03
#define I_write   0x02

#define eeprom_addr  int16
//#include "25c080.c"
///////////////////////////////////////////////////////////////////////////////
//seg code                 '0'    '1'   '2'   '3'   '4'   '5'   '6'   '7'   '8'   '9'   off   -
const int8 DIsp_led_cc[]={ 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x00, 0x40};//common chnode
const int8 DIsp_led_ca[]={ 0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90, 0xff};//common anode
int8 count;

////////////////////////////////////////////////////////////////////////////////

void init_mcu(void)
{


   setup_adc_ports(NO_ANALOGS);
   setup_adc(ADC_OFF);
   setup_psp(PSP_DISABLED);
   setup_spi(SPI_MASTER|SPI_H_TO_L|SPI_CLK_DIV_4);
   //setup_spi(SPI_MASTER|SPI_L_TO_H|SPI_SCK_DIV_4);// NG??????????
   setup_counters(RTCC_INTERNAL,RTCC_DIV_256);
   setup_timer_1(T1_DISABLED);
   setup_timer_2(T2_DISABLED,0,1);
   setup_ccp1(CCP_OFF);
   setup_ccp2(CCP_OFF);
   setup_comparator(NC_NC_NC_NC);
   setup_vref(FALSE);

  // enable_interrupts(int_RTCC);
  // enable_interrupts(global);


}
///////////////////////////////////////////////////////////////////////////////
void spi_out(int8 dat)
{
   sspbuf=dat;
   while(!sspif);//ok
   sspif=0;

}
///////////////////////////////////////////////////////////////////////////////

int8 spi_in()
{
   //int8 data;
   sspbuf=0;//must (generate pulse)
   while(!sspif);
   sspif=0;
  // data=sspbuf;
   return(sspbuf);

}
///////////////////////////////////////////////////////////////////////////////

void init_ext_eeprom()
{
   short int i;

   output_high(CS);
   output_low(SDI);
   output_low(SCK);
   output_low(SDO);

}

///////////////////////////////////////////////////////////////////////////////
int1 ext_eeprom_ready()
{

   int8 data;

   output_low(CS);
   spi_write(0x05);         //rdsr instruction
   data=spi_read();
   output_high(CS);//opration complete must set cs high
   return !bit_test(data, 0);   //return wip
}
#if defined spi_library//ng?????????????????????????????????????????????????
///////////////////////////////////////////////////////////////////////////////
void write_ext_eeprom(int8 page, int8 addr, int8 dat)
{

   output_low(CS);//
   spi_write(0x06);          //wren
   output_high(CS);        //must
   delay_us(10);

   output_low(CS);
   spi_write(0x02);         //write instruction
   spi_write(page);        //high 8 bits
   spi_write(address);
   spi_write(dat);
   output_high(CS);//opration complete must set cs high

}
///////////////////////////////////////////////////////////////////////////////
int8 read_ext_eeprom(int8 page, int8 address)
{
   int8 data;
   //while(!ext_eeprom_ready());
   output_low(CS);
   spi_write(0x03);//read eeprom instruction
   spi_write(page);//high 8 bits
   spi_write(address );
   data=spi_read(0);
   output_high(CS);

   return(data);
}
#else  //ok
///////////////////////////////////////////////////////////////////////////////
void write_ext_eeprom(int16 addr, int8 dat)
{
   //int8 i_write;

   output_low(CS);//select chip
   spi_write(0x06);          //wren
   output_high(CS);        //must
   //delay_us(10);

   output_low(CS);
   spi_out(0x02);//write instruction
   spi_out((int8)(addr>>8));//high 8 bits
   spi_out((int8)(addr));
   spi_out(dat);
   output_high(CS);//opration complete must set cs high

}
///////////////////////////////////////////////////////////////////////////////
int8 read_ext_eeprom( int16 addr)
{
   int8 data;
   
   //while(!ext_eeprom_ready());
   output_low(CS);
   spi_out(0x03);//read eeprom instruction
   spi_out((int8)(addr>>8));//high 8 bits
   spi_out((int8)(addr));
   data=spi_in();
   output_high(CS);

   return(data);
}
#endif
////////////////////////////////////////////////////////////////////////////////
void main ()
{
   int16  i=1,j,recdata;
   int16 adr;
  /*
  // library spi    ng????????????????????????????
   setup_spi(SPI_MASTER|SPI_H_TO_L|SPI_CLK_DIV_4);
  // init_ext_eeprom();
   //while(1)
   {

      //spi_write(DIsp_led_cc[i++]);
      //delay_ms(1000);
     for(i=0;i<15;i++)
     {
        WRITE_EXT_EEPROM(2,i,i);
        delay_ms(500);
     }

   }
  */
   //self_hard spi   ok
   trisc=0xd7;
   sspstat=0x00;
   sspcon=0x30;
   set_timer0(81); //timer0 initial value
   //while(1)
   {
         ////////////////////////////write
         for(i=0;i<1024;i++)
         {
           WRITE_EXT_EEPROM(i,i);
           delay_ms(1);
         }
        
         ///////////////////////////read
         for(i=0;i<1024;i++)
         {

           printf("%u\n\r",READ_EXT_EEPROM(i));
           delay_ms(1);
         }
        
   }

}