calib_values.h File Reference

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Detailed Description

Configuration and macros.

Application note:

AVR055: Using a 32 kHz crystal to calibrate the internal RC oscillator

Documentation

For comprehensive code documentation, supported compilers, compiler settings and supported devices see readme.html

Author:

Atmel Corporation: http://www.atmel.com
Support email: avr@atmel.com

Name

RELEASE_1_1

Revision

1.2

RCSfile

calib_values.h,v

Date

2006/02/17 12:49:26

Definition in file calib_values.h.

#include "device_specific.h"

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Defines
#define	ABS(var)   (((var) < 0) ? -(var) : (var));
#define	CALIBRATION_FREQUENCY   1000000
	User defined values.
#define	COMPUTE_COUNT_VALUE()   countVal = ((EXTERNAL_TICKS*CALIBRATION_FREQUENCY)/(XTAL_FREQUENCY*LOOP_CYCLES));
#define	DEFAULT_OSCCAL   ((1 << (OSCCAL_RESOLUTION - 1)) | DEFAULT_OSCCAL_MASK)
#define	DEFAULT_OSCCAL_HIGH   ((1 << (OSCCAL_RESOLUTION - 1)) | DEFAULT_OSCCAL_MASK_HIGH)
#define	DEFAULT_OSCCAL_MASK   0x00
#define	DEFAULT_OSCCAL_MASK_HIGH   0x80
#define	EXTERNAL_TICKS   100
#define	FALSE   0
	Fixed calibration values and macros.
#define	FINISHED   1
#define	INITIAL_STEP   (1 << (OSCCAL_RESOLUTION - 2))
#define	NOP()   __no_operation()
#define	PREPARE_CALIBRATION()
#define	RUNNING   0
#define	SETUP_ASYNC_TIMER()
#define	TRUE   1
#define	XTAL_FREQUENCY   32768

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Define Documentation

#define ABS (  var   )     (((var) < 0) ? -(var) : (var));

Definition at line 109 of file calib_values.h. Referenced by CalibrateInternalRc().

#define CALIBRATION_FREQUENCY   1000000

User defined values. Modify CALIBRATION_FREQUENCY to desired calibration frequency Definition at line 44 of file calib_values.h.

#define COMPUTE_COUNT_VALUE (   )     countVal = ((EXTERNAL_TICKS*CALIBRATION_FREQUENCY)/(XTAL_FREQUENCY*LOOP_CYCLES));

Definition at line 74 of file calib_values.h. Referenced by CalibrationInit().

#define DEFAULT_OSCCAL   ((1 << (OSCCAL_RESOLUTION - 1)) | DEFAULT_OSCCAL_MASK)

Definition at line 67 of file calib_values.h. Referenced by CalibrationInit().

#define DEFAULT_OSCCAL_HIGH   ((1 << (OSCCAL_RESOLUTION - 1)) | DEFAULT_OSCCAL_MASK_HIGH)

Definition at line 65 of file calib_values.h. Referenced by main().

#define DEFAULT_OSCCAL_MASK   0x00

Definition at line 60 of file calib_values.h.

#define DEFAULT_OSCCAL_MASK_HIGH   0x80

Definition at line 61 of file calib_values.h.

#define EXTERNAL_TICKS   100

Definition at line 49 of file calib_values.h. Referenced by Counter().

#define FALSE   0

Fixed calibration values and macros. These values are fixed and used by all calibration methods. Not to be modified. Definition at line 56 of file calib_values.h.

#define FINISHED   1

Definition at line 59 of file calib_values.h. Referenced by BinarySearch(), CalibrateInternalRc(), and NeighborSearch().

#define INITIAL_STEP   (1 << (OSCCAL_RESOLUTION - 2))

Definition at line 66 of file calib_values.h.

#define NOP (   )     __no_operation()

Definition at line 105 of file calib_values.h. Referenced by BinarySearch(), CalibrateInternalRc(), CalibrationInit(), main(), and NeighborSearch().

#define PREPARE_CALIBRATION (   )

Value: calStep = INITIAL_STEP; \ calibration = RUNNING; Definition at line 70 of file calib_values.h. Referenced by main().

#define RUNNING   0

Definition at line 58 of file calib_values.h. Referenced by CalibrateInternalRc().

#define SETUP_ASYNC_TIMER (   )

Value: ASSR |= (1<<ASYNC_TIMER); \ ASYNC_TIMER_CONTROL_REGISTER = (1<<NO_PRESCALING); Definition at line 78 of file calib_values.h. Referenced by CalibrationInit().

#define TRUE   1

Definition at line 57 of file calib_values.h.

#define XTAL_FREQUENCY   32768

Frequency of the external oscillator. A 32kHz crystal is recommended Definition at line 48 of file calib_values.h.

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