avr_compiler.h File Reference

AVR compiler. More...

#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>

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Defines
#define	AVR_ENTER_CRITICAL_REGION()
	This macro will protect the following code from interrupts.
#define	AVR_LEAVE_CRITICAL_REGION()   SREG = saved_sreg;
	This macro must always be used in conjunction with AVR_ENTER_CRITICAL_REGION so the interrupts are enabled again.
#define	F_CPU   32000000UL
	Define default CPU frequency, if this is not already defined.

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Detailed Description

AVR compiler.

This file contains the avr includes for: AN1320: True 400kHz operation for TWI slave

• Compiler: IAR EWAVR
• Supported devices: XMEGA A1 series

Author:

Atmel Corporation: http://www.atmel.com
Support and FAQ: http://support.atmel.no/

Definition in file avr_compiler.h.

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Define Documentation

 

#define AVR_ENTER_CRITICAL_REGION

(

)

Value:

uint8_t volatile saved_sreg = SREG; \
                                     cli();

This macro will protect the following code from interrupts.

Definition at line 60 of file avr_compiler.h.

 

#define AVR_LEAVE_CRITICAL_REGION

(

)

SREG = saved_sreg;

This macro must always be used in conjunction with AVR_ENTER_CRITICAL_REGION so the interrupts are enabled again.

Definition at line 66 of file avr_compiler.h.

#define F_CPU   32000000UL

Define default CPU frequency, if this is not already defined.

Definition at line 51 of file avr_compiler.h.