cc1000avr.c

CodevisionAVR 开发环境。 用AVR控制TI/Chipcon非常常用的CC1000射频收发芯片。

/****************************************************************************/
/* Application note AN009                                                   */
/* CC1000 interface library                                                 */
/*                                                                          */
/* File:      cc1000avr.c                                                   */
/* Revision:  2.1                                                           */
/*                                                                          */
/* Microcontroller:                                                         */
/*          Atmel AVRmega8L                                                 */
/* Written for the IAR AVR compiler                                         */
/*                                                                          */
/* Author:  Karl H. Torvmark, Field Applications Engineer, Chipcon          */
/*                                                                          */
/* Contact: Chipcon AS [phone]                                      */
/*          [e-mail]                                            */
/*                                                                          */
/* Changes:                                                                 */
/*      2.1 : First AVR version                                             */
/****************************************************************************/

/****************************************************************************/
/* This library contains functions for configuring the CC1000. These        */
/* routines use bit-banging to program the CC1000.                          */
/* Routines to read and write the calibration values in the CC1000 are      */
/* provided, they aree useful in frequency-agile and frequency hopping      */
/* applications. See application note AN009 for more information.           */
/* The routines in this file will have to be adapted depending on the MCU   */
/* and compiler used.                                                       */
/****************************************************************************/

/*                                                                           *
 * Revision history:                                                         *
 *   
 *
 *Changed to ATmega48 and Pin ReAssignment  2006-8-13 8:57      LY
 *Change to CodeViosion AVR C compiler and IDE
 *
 *
 *
 *
 * $Log: cc1000avr.c,v $
 * Revision 2.5  2003/05/08 10:51:52  tos
 * Corrected LOCK monitor in Calibrate.
 *
 * Revision 2.4  2003/05/08 10:05:26  tos
 * Corrections according to Errata Note 01: reset freq.synth if unable to lock PLL.
 *
 * Revision 2.3  2003/04/28 08:21:14  tos
 * Corrected inconsistent monitoring of CC1000: [calibration complete] + [lock].
 *
 *
 *                                                                           *
 ****************************************************************************/

#include "CC1000.h"
//#include "iom8.h"
#include "mega48.h"
#include <stdio.h>
#include <configure.h>
extern void putchar(char c);
extern void writeln(char flash*str);

/****************************************************************************/
/*  This routine sends new configuration data to the CC1000                 */
/*  Based on bit bashing (general I/O pin use)                              */
/****************************************************************************/

void ConfigureCC1000(char Count, short Configuration[])
{
  char  BitCounter;
  char  WordCounter;
  short Data;
 
 
   
  PORTC|=(1<<PALE); //PALE=1
  
  for (WordCounter=0;WordCounter<Count;WordCounter++)
  {
    Data=Configuration[WordCounter];
    PORTC&=~(1<<PALE); // PALE=0
    
    /* Send address bits */
    for (BitCounter=0;BitCounter<7;BitCounter++)
    {
      PORTC|=(1<<PCLK); // PCLK=1
      if ((Data&0x8000)==0) {
        PORTC&=~(1<<PDATA); // PDATA=0
      }
      else {
        PORTC|=(1<<PDATA); // PDATA=1
      }
      Data=Data<<1;
      PORTC&=~(1<<PCLK); //PCLK=0;
    }
    
    /* Send read/write bit */
    /* Ignore bit in data, always use 1 */
    
    PORTC|=(1<<PCLK); //PCLK=1
    PORTC|=(1<<PDATA);  //PDATA=1
    PORTC&=~(1<<PCLK); //PCLK=0
    Data=Data<<1;
    PORTC|=(1<<PCLK); //PCLK=1
    PORTC|=(1<<PALE); //PALE=1
    
    /* Send data bits */
    
    for (BitCounter=0;BitCounter<8;BitCounter++)
    {
      PORTC|=(1<<PCLK); //PCLK=1
      if ((Data&0x8000)==0) {
        PORTC&=~(1<<PDATA); // PDATA=0
      }
      else {
        PORTC|=(1<<PDATA); // PDATA=1
      }
      Data=Data<<1;
      PORTC&=~(1<<PCLK); //PCLK=0
     }
  PORTC|=(1<<PCLK); //PCLK=1
  }   /* Finished with word */   
}

/****************************************************************************/
/*  This routine writes to a single CC1000 register                         */
/****************************************************************************/

void WriteToCC1000Register(char addr, char data)
{
  short val;
  
  val=(short)(addr&0x7F)<<9 | (short) (data&0xFF);
  ConfigureCC1000(1,&val);
}

/****************************************************************************/
/*  This routine writes to a single CC1000 register, with data and address  */
/*  given in the same variable                                              */
/****************************************************************************/

void WriteToCC1000RegisterWord(short addranddata)
{
 
  ConfigureCC1000(1,&addranddata);
}

/****************************************************************************/
/*  This routine reads from a single CC1000 register                        */
/****************************************************************************/

char ReadFromCC1000Register(char addr)
{
  char BitCounter;
  char Data;
  char Debug;
  
    
  PORTC|=(1<<PALE); //PALE=1
  
  Data=addr<<1;
  PORTC&=~(1<<PALE);
    
  /* Send address bits */
  for (BitCounter=0;BitCounter<7;BitCounter++)
  {
    PORTC|=(1<<PCLK); // PCLK=1
    if ((Data&0x80)==0) {
      PORTC&=~(1<<PDATA); // PDATA=0
    }
    else {
      PORTC|=(1<<PDATA); // PDATA=1
    }
    Data=Data<<1;
    PORTC&=~(1<<PCLK); //PCLK=0;
  }
  
  /* Send read/write bit */
  /* Ignore bit in data, always use 0 */
  
  PORTC|=(1<<PCLK); //PCLK=1
  PORTC&=~(1<<PDATA); //PDATA=0
  PORTC&=~(1<<PCLK); //PCLK=0
 
 
  PORTC|=(1<<PCLK); //PCLK=1
  PORTC|=(1<<PALE); //PALE=1
    
  /* Receive data bits */
  
  PORTC|=(1<<PDATA); //PDATA=1
   
  DDRC&=~(1<<PDATA); /* Set up PDATA as an input */
    
  for (BitCounter=0;BitCounter<8;BitCounter++)
  {
    PORTC&=~(1<<PCLK); //PCLK=0
    Data=Data<<1;
    Debug=(1<<PDATA);
    if ((PINC&Debug)==0) {
      Data&=0xFE;
    } else {
      Data|=0x01;
    }
    PORTC|=(1<<PCLK); //PCLK=1
  }
  
  
  DDRC|=(1<<PDATA); /* Set up PDATA as an output again */
  
  return Data;
}
  
/****************************************************************************/
/*  This routine resets the CC1000, clearing all registers.                 */
/****************************************************************************/  

void ResetCC1000(void)
{
  char MainValue;
  int i;
  
  MainValue=ReadFromCC1000Register(CC1000_MAIN);
  WriteToCC1000Register(CC1000_MAIN,MainValue & 0xFE);         // Reset CC1000    
  for (i=0;i<0x1000;i++);
  WriteToCC1000Register(CC1000_MAIN,MainValue | 0x01);         // Bring CC1000 out of reset
}


/****************************************************************************/
/*  This routine calibrates the CC1000                                      */
/*  Returns 0 if calibration fails, non-zero otherwise. Checks the LOCK     */
/*  to check for success.                                                   */
/****************************************************************************/

char CalibrateCC1000(void)
{  
  int TimeOutCounter,i;

  WriteToCC1000Register(CC1000_PA_POW,0x00); // Turn off PA to avoid spurs
                                             // during calibration in TX mode
  WriteToCC1000Register(CC1000_CAL,0xA6); // Start calibration