/*
avr_misc.h

provide functions to set up hardware

Copyright 2005 EIT European Infotech AB www.eit.se.

This file is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

History

2005-02-16
Created. 
Henrik Björkman

2005-07-01
cleanup
Henrik
*/


#ifndef AVR_MISC_H
#define AVR_MISC_H


#ifndef NULL
#define NULL 0
#endif


#ifdef DEBUG_LED_PORT


/* enable debug LED as output */
#define DEBUG_LED_ENABLE() DEBUG_LED_DDR|= _BV(DEBUG_LED_BIT);

/* disable debug LED as output */
#define DEBUG_LED_DISABLE() DEBUG_LED_DDR&= ~(_BV(DEBUG_LED_BIT));

/* set debug LED output to on */
#ifdef DEBUG_LED_ACTIVE_HIGH
#define DEBUG_LED_ON() DEBUG_LED_PORT|= _BV(DEBUG_LED_BIT);
#else
#define DEBUG_LED_ON() DEBUG_LED_PORT &= ~_BV(DEBUG_LED_BIT);
#endif

/* set debug LED output to off */
#ifdef DEBUG_LED_ACTIVE_HIGH
#define DEBUG_LED_OFF() DEBUG_LED_PORT &= ~_BV(DEBUG_LED_BIT);
#else
#define DEBUG_LED_OFF() DEBUG_LED_PORT|= _BV(DEBUG_LED_BIT);
#endif

#else

// Dummy macros, in case there is no debug LED.
#define DEBUG_LED_ENABLE()
#define DEBUG_LED_DISABLE()
#define DEBUG_LED_ON()
#define DEBUG_LED_OFF()

#endif


/* compatibilty macros for old style */
/* for new design instead of "sbi(DDRC,PC5);" use "DDRC|= _BV(PC5);" */
#if 0

#ifndef cbi
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#endif

#ifndef sbi
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif

#ifndef outp
#define outp(value,sfr) (_SFR_BYTE(sfr) = value)
#endif

#ifndef inp
#define inp(sfr) (_SFR_BYTE(sfr))
#endif

#endif



int avr_blink(char n);


// set up hardware (port directions, registers etc.)
void avr_init(void);


// busy-wait seconds, milliseconds or microseconds
void avr_delay_s(int s);
void avr_delay_ms(int ms);
void avr_delay_us(int us);

// Enter power save mode
inline void avr_idle(void);




void debug_uart_init(void);


/* send if not using interrupt */
void debug_uart_putchar(char data );


/* receive if not using interrupt */
/* wait until a character is available */
unsigned char debug_uart_waitchar( void );


/* receive if not using interrupt */
/* return -1 if no character was available */
int debug_uart_getchar(void);


void debug_uart_print_P(const char *addr);

void debug_uart_test(void);


/* send if not using interrupt */
void debug_uart_putchar(char data );


/* receive if not using interrupt */
/* wait until a character is available */
unsigned char debug_uart_waitchar( void );


/* receive if not using interrupt */
/* return -1 if no character was available */
int debug_uart_getchar(void);

void debug_uart_print_P(const char *addr);

void debug_uart_test(void);



#endif // AVR_H