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Move pio_fast.h stuff into pio.h to simplify dependency graphs for the students

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Michael Hayes 14 years ago
parent ce75df1ad9
commit 4666d4a1b0
2 changed files with 161 additions and 169 deletions
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163
drivers/avr/pio.h
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@ -107,11 +107,170 @@ bool pio_output_get (pio_t pio);
@param state value to write pio */ @param state value to write pio */
void pio_output_set (pio_t pio, bool state); void pio_output_set (pio_t pio, bool state);
#else #else
/* Use fast PIO implementation instead. */ /* WARNING: BEWARE ALL YE WHO LOOK BELOW! IT MAY DO YOUR HEAD IN.
#include "pio_fast.h"
The following uses advanced C techniques such as macros and inline
functions to achieve a fast PIO implementation. */
/** Define a PIO as a unique 16 bit number encoding the low part of
the PORT address offset in the low byte and the bit mask in the
high byte. PORTB is used for the pattern since PORTA is not
always defined for some AVRs. */
#define PIO_DEFINE(PORT, PORTBIT) ((((PORT) - PORT_B) * 3) | (BIT(PORTBIT) << 8))
/** Private macro to lookup bitmask. */
#define PIO_BITMASK_(PIO) ((PIO) >> 8)
/** Private macro to lookup port register. */
#define PIO_PORT_(PIO) (&PORTB + ((PIO) & 0xff))
/** Private macro to map a pio to its corresponding data direction
register (DDR). NB, the DDR and PORT registers must be separated
by the same number of bytes in all cases. PORTB is used for the
pattern since PORTA is not always defined for some AVRs. */
#define PIO_DDR_(PIO) (*(PIO_PORT_ (PIO) + (&DDRB - &PORTB)))
/** Private macro to map a pio to its input register (PIN). NB, the
PIN and PORT registers must be separated by the same number of
bytes in all cases. PORTB is used for the pattern since PORTA is
not always defined for some AVRs. */
#define PIO_PIN_(PIO) (*(PIO_PORT_ (PIO) + (&PINB - &PORTB)))
/** Private macro to access a pio data register. */
#define PIO_DATA_(PIO) (*PIO_PORT_ (PIO))
/** Configure pio.
@param pio PIO to configure
@param config PIO configuration type
@return non-zero for success. */
static inline
bool pio_config_set (pio_t pio, pio_config_t config)
{
switch (config)
{
case PIO_OUTPUT_LOW:
PIO_DATA_ (pio) &= ~PIO_BITMASK_ (pio);
PIO_DDR_ (pio) |= PIO_BITMASK_ (pio);
return 1;
case PIO_OUTPUT_HIGH:
PIO_DATA_ (pio) |= PIO_BITMASK_ (pio);
PIO_DDR_ (pio) |= PIO_BITMASK_ (pio);
return 1;
case PIO_INPUT:
PIO_DDR_ (pio) &= ~PIO_BITMASK_ (pio);
PIO_DATA_ (pio) &= ~PIO_BITMASK_ (pio);
return 1;
case PIO_PULLUP:
PIO_DDR_ (pio) &= ~PIO_BITMASK_ (pio);
PIO_DATA_ (pio) |= PIO_BITMASK_ (pio);
return 1;
default:
return 0;
}
}
/** Return pio configuration
@param pio
@return config */
static inline
pio_config_t pio_config_get (pio_t pio)
{
bool ddr;
bool port;
ddr = PIO_DDR_ (pio) & PIO_BITMASK_ (pio);
port = PIO_DATA_ (pio) & PIO_BITMASK_ (pio);
if (ddr)
{
if (port)
return PIO_OUTPUT_HIGH;
else
return PIO_OUTPUT_LOW;
}
if (port)
return PIO_PULLUP;
return PIO_INPUT;
}
/** Set pio high.
@param pio */
static inline
void pio_output_high (pio_t pio)
{
PIO_DATA_ (pio) |= PIO_BITMASK_ (pio);
}
/** Set pio low.
@param pio */
static inline
void pio_output_low (pio_t pio)
{
PIO_DATA_ (pio) &= ~PIO_BITMASK_ (pio);
}
/** Toggle pio.
@param pio */
static inline
void pio_output_toggle (pio_t pio)
{
PIO_DATA_ (pio) ^= PIO_BITMASK_ (pio);
}
/** Read input state from pio.
@param pio
@return input state of pio */
static inline
bool pio_input_get (pio_t pio)
{
return (PIO_PIN_ (pio) & PIO_BITMASK_ (pio)) != 0;
}
/** Get output state of pio.
@param pio
@return output state of pio */
static inline
bool pio_output_get (pio_t pio)
{
return (PIO_DATA_ (pio) & PIO_BITMASK_ (pio)) != 0;
}
/** Set pio to desired state.
@param pio
@param state value to write pio */
static inline
void pio_output_set (pio_t pio, bool state)
{
state ? pio_output_high (pio) : pio_output_low (pio);
}
#endif #endif
#endif #endif

167
drivers/avr/pio_fast.h
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@ -1,167 +0,0 @@
/** @file pio-fast.h
@author M. P. Hayes, UCECE
@date 11 Jan 2006
@brief Fast PIO hardware abstraction for AVR microcontroller.
@note Macros and inline functions are used to avoid function
call overhead and to allow compile-time constant folding.
*/
#ifndef PIO_FAST_H
#define PIO_FAST_H
#include "system.h"
#ifdef AVR
#include <avr/io.h>
#endif
/** Define a PIO as a unique 16 bit number encoding the low part of
the PORT address offset in the low byte and the bit mask in the
high byte. PORTB is used for the pattern since PORTA is not
always defined for some AVRs. */
#define PIO_DEFINE(PORT, PORTBIT) ((((PORT) - PORT_B) * 3) | (BIT(PORTBIT) << 8))
/** Private macro to lookup bitmask. */
#define PIO_BITMASK_(PIO) ((PIO) >> 8)
/** Private macro to lookup port register. */
#define PIO_PORT_(PIO) (&PORTB + ((PIO) & 0xff))
/** Private macro to map a pio to its corresponding data direction
register (DDR). NB, the DDR and PORT registers must be separated
by the same number of bytes in all cases. PORTB is used for the
pattern since PORTA is not always defined for some AVRs. */
#define PIO_DDR_(PIO) (*(PIO_PORT_ (PIO) + (&DDRB - &PORTB)))
/** Private macro to map a pio to its input register (PIN). NB, the
PIN and PORT registers must be separated by the same number of
bytes in all cases. PORTB is used for the pattern since PORTA is
not always defined for some AVRs. */
#define PIO_PIN_(PIO) (*(PIO_PORT_ (PIO) + (&PINB - &PORTB)))
/** Private macro to access a pio data register. */
#define PIO_DATA_(PIO) (*PIO_PORT_ (PIO))
/** Configure pio.
@param pio PIO to configure
@param config PIO configuration type
@return non-zero for success. */
static inline
bool pio_config_set (pio_t pio, pio_config_t config)
{
switch (config)
{
case PIO_OUTPUT_LOW:
PIO_DATA_ (pio) &= ~PIO_BITMASK_ (pio);
PIO_DDR_ (pio) |= PIO_BITMASK_ (pio);
return 1;
case PIO_OUTPUT_HIGH:
PIO_DATA_ (pio) |= PIO_BITMASK_ (pio);
PIO_DDR_ (pio) |= PIO_BITMASK_ (pio);
return 1;
case PIO_INPUT:
PIO_DDR_ (pio) &= ~PIO_BITMASK_ (pio);
PIO_DATA_ (pio) &= ~PIO_BITMASK_ (pio);
return 1;
case PIO_PULLUP:
PIO_DDR_ (pio) &= ~PIO_BITMASK_ (pio);
PIO_DATA_ (pio) |= PIO_BITMASK_ (pio);
return 1;
default:
return 0;
}
}
/** Return pio configuration
@param pio
@return config */
static inline
pio_config_t pio_config_get (pio_t pio)
{
bool ddr;
bool port;
ddr = PIO_DDR_ (pio) & PIO_BITMASK_ (pio);
port = PIO_DATA_ (pio) & PIO_BITMASK_ (pio);
if (ddr)
{
if (port)
return PIO_OUTPUT_HIGH;
else
return PIO_OUTPUT_LOW;
}
if (port)
return PIO_PULLUP;
return PIO_INPUT;
}
/** Set pio high.
@param pio */
static inline
void pio_output_high (pio_t pio)
{
PIO_DATA_ (pio) |= PIO_BITMASK_ (pio);
}
/** Set pio low.
@param pio */
static inline
void pio_output_low (pio_t pio)
{
PIO_DATA_ (pio) &= ~PIO_BITMASK_ (pio);
}
/** Toggle pio.
@param pio */
static inline
void pio_output_toggle (pio_t pio)
{
PIO_DATA_ (pio) ^= PIO_BITMASK_ (pio);
}
/** Read input state from pio.
@param pio
@return input state of pio */
static inline
bool pio_input_get (pio_t pio)
{
return (PIO_PIN_ (pio) & PIO_BITMASK_ (pio)) != 0;
}
/** Get output state of pio.
@param pio
@return output state of pio */
static inline
bool pio_output_get (pio_t pio)
{
return (PIO_DATA_ (pio) & PIO_BITMASK_ (pio)) != 0;
}
/** Set pio to desired state.
@param pio
@param state value to write pio */
static inline
void pio_output_set (pio_t pio, bool state)
{
state ? pio_output_high (pio) : pio_output_low (pio);
}
#endif
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