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Use even faster and smaller PIO implemenation and add delay navswitch to fix read

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This commit is contained in:
Michael Hayes
2011-09-02 06:11:03 +00:00
parent d6cec3f386
commit 5e75e06e6a
4 changed files with 196 additions and 54 deletions
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drivers/avr/pio.h
+7 -7
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@@ -69,25 +69,25 @@ typedef enum pio_config_enum
/** Define a PIO as a unique 16 bit number encoding the low part of
the PORT address 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 + (uint16_t) (&PORTB)) & 0xff) + (BIT(PORTBIT) << 8))
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)
#define PIO_BITMASK_(PIO) ((PIO) >> 8)
/** Private macro to lookup port register. */
#define PIO_PORT_(pio) ((pio_port_t)(pio & 0xff))
#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)))
#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