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Started implementing the low level PDI protocol in the AVRISP project, for XMEGA device programming.

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This commit is contained in:
Dean Camera 2009-12-03 00:53:45 +00:00
parent f92b56191d
commit f69f03cb0d
10 changed files with 240 additions and 37 deletions
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105
Projects/AVRISP/Lib/PDITarget.c Normal file
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/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
#if defined(ENABLE_XPROG_PROTOCOL)
/** \file
*
* Target-related functions for the PDI Protocol decoder.
*/
#define INCLUDE_FROM_PDITARGET_C
#include "PDITarget.h"
void PDITarget_SendByte(uint8_t Byte)
{
PDIDATA_LINE_PORT &= ~PDIDATA_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
for (uint8_t i = 0; i < 8; i++)
{
if (Byte & 0x01)
PDIDATA_LINE_PORT |= PDIDATA_LINE_MASK;
else
PDIDATA_LINE_PORT &= ~PDIDATA_LINE_MASK;
Byte >>= 1;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
}
PDIDATA_LINE_PORT |= PDIDATA_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
}
uint8_t PDITarget_ReceiveByte(void)
{
uint8_t ReceivedByte = 0;
PDIDATA_LINE_DDR &= ~PDIDATA_LINE_MASK;
bool FoundStartBit;
do
{
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
FoundStartBit = !(PDIDATA_LINE_PIN & PDIDATA_LINE_MASK);
} while (!FoundStartBit);
for (uint8_t i = 0; i < 8; i++)
{
if (PDIDATA_LINE_PIN & PDIDATA_LINE_MASK)
ReceivedByte |= 0x01;
ReceivedByte <<= 1;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
}
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDICLOCK_LINE_PORT ^= PDICLOCK_LINE_MASK;
PDIDATA_LINE_DDR |= PDIDATA_LINE_MASK;
return ReceivedByte;
}
#endif