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Slightly speed up software USART in the AVRISP project - faster parity computation, ensure received data is byte aligned when receive is complete by throwing away the start bit during reception.

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This commit is contained in:
Dean Camera 2009-12-16 08:03:04 +00:00
parent 108a22a66a
commit f0b4d79629
3 changed files with 25 additions and 9 deletions
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12
Projects/AVRISP/Lib/PDITarget.h
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@ -54,7 +54,17 @@
/* Defines: */
#if ((BOARD == BOARD_XPLAIN) || (BOARD == BOARD_XPLAIN_REV1))
#define PDI_VIA_HARDWARE_USART
// #define PDI_VIA_HARDWARE_USART
#define BITBANG_PDIDATA_PORT PORTD
#define BITBANG_PDIDATA_DDR DDRD
#define BITBANG_PDIDATA_PIN PIND
#define BITBANG_PDIDATA_MASK (1 << 3)
#define BITBANG_PDICLOCK_PORT PORTD
#define BITBANG_PDICLOCK_DDR DDRD
#define BITBANG_PDICLOCK_PIN PIND
#define BITBANG_PDICLOCK_MASK (1 << 5)
#else
#define BITBANG_PDIDATA_PORT PORTB
#define BITBANG_PDIDATA_DDR DDRB