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148 lines
4.0 KiB
148 lines
4.0 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Target-related functions for the V2 Protocol decoder.
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*/
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#include "V2ProtocolTarget.h"
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/** Current memory address for FLASH/EEPROM memory read/write commands */
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uint32_t CurrentAddress;
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uint8_t V2Protocol_GetSPIPrescalerMask(void)
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{
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static const uint8_t SPIMaskFromSCKDuration[] =
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{
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#if (F_CPU == 8000000)
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SPI_SPEED_FCPU_DIV_2,
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#endif
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SPI_SPEED_FCPU_DIV_2, SPI_SPEED_FCPU_DIV_4, SPI_SPEED_FCPU_DIV_8,
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SPI_SPEED_FCPU_DIV_16, SPI_SPEED_FCPU_DIV_32, SPI_SPEED_FCPU_DIV_64
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#if (F_CPU == 16000000)
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, SPI_SPEED_FCPU_DIV_128
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#endif
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};
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uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);
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if (SCKDuration >= sizeof(SPIMaskFromSCKDuration))
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SCKDuration = (sizeof(SPIMaskFromSCKDuration) - 1);
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return SPIMaskFromSCKDuration[SCKDuration];
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}
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void V2Protocol_ChangeTargetResetLine(bool ResetTarget)
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{
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if (ResetTarget)
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{
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RESET_LINE_DDR |= RESET_LINE_MASK;
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if (!(V2Params_GetParameterValue(PARAM_RESET_POLARITY)))
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RESET_LINE_PORT |= RESET_LINE_MASK;
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}
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else
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{
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RESET_LINE_PORT &= ~RESET_LINE_MASK;
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RESET_LINE_DDR &= ~RESET_LINE_MASK;
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}
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}
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void V2Protocol_DelayMS(uint8_t MS)
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{
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TCNT0 = 0;
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while (TCNT0 < MS);
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}
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uint8_t V2Protocol_WaitForProgComplete(uint8_t ProgrammingMode, uint16_t PollAddress, uint8_t PollValue,
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uint8_t DelayMS, uint8_t ReadMemCommand)
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{
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uint8_t ProgrammingStatus = STATUS_CMD_OK;
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/* Determine method of Programming Complete check */
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switch (ProgrammingMode & ~(PROG_MODE_PAGED_WRITES_MASK | PROG_MODE_COMMIT_PAGE_MASK))
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{
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case PROG_MODE_WORD_TIMEDELAY_MASK:
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case PROG_MODE_PAGED_TIMEDELAY_MASK:
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V2Protocol_DelayMS(DelayMS);
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break;
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case PROG_MODE_WORD_VALUE_MASK:
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case PROG_MODE_PAGED_VALUE_MASK:
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TCNT0 = 0;
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do
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{
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SPI_SendByte(ReadMemCommand);
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SPI_SendByte(PollAddress >> 8);
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SPI_SendByte(PollAddress & 0xFF);
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}
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while ((SPI_TransferByte(0x00) != PollValue) && (TCNT0 < TARGET_BUSY_TIMEOUT_MS));
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if (TCNT0 >= TARGET_BUSY_TIMEOUT_MS)
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ProgrammingStatus = STATUS_RDY_BSY_TOUT;
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break;
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case PROG_MODE_WORD_READYBUSY_MASK:
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case PROG_MODE_PAGED_READYBUSY_MASK:
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ProgrammingStatus = V2Protocol_WaitWhileTargetBusy();
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break;
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}
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return ProgrammingStatus;
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}
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uint8_t V2Protocol_WaitWhileTargetBusy(void)
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{
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TCNT0 = 0;
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do
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{
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SPI_SendByte(0xF0);
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SPI_SendByte(0x00);
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SPI_SendByte(0x00);
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}
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while ((SPI_ReceiveByte() & 0x01) && (TCNT0 < TARGET_BUSY_TIMEOUT_MS));
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if (TCNT0 >= TARGET_BUSY_TIMEOUT_MS)
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return STATUS_RDY_BSY_TOUT;
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else
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return STATUS_CMD_OK;
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}
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void V2Protocol_LoadExtendedAddress(void)
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{
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SPI_SendByte(0x4D);
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SPI_SendByte(0x00);
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SPI_SendByte((CurrentAddress & 0x00FF0000) >> 16);
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SPI_SendByte(0x00);
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}
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