Projects/Incomplete/AVRISP/Lib/V2ProtocolTarget.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Target-related functions for the V2 Protocol decoder.
  34  */
  35
  36 #include "V2ProtocolTarget.h"
  37
  38 /** Current memory address for FLASH/EEPROM memory read/write commands */
  39 uint32_t CurrentAddress;
  40
  41 /** Table of masks for SPI_Init() from a given PARAM_SCK_DURATION value */
  42 static const uint8_t SPIMaskFromSCKDuration[] =
  43         {
  44                 #if (F_CPU == 8000000)
  45                 SPI_SPEED_FCPU_DIV_2,
  46                 #endif
  47                 SPI_SPEED_FCPU_DIV_2, SPI_SPEED_FCPU_DIV_4, SPI_SPEED_FCPU_DIV_8,
  48                 SPI_SPEED_FCPU_DIV_16, SPI_SPEED_FCPU_DIV_32, SPI_SPEED_FCPU_DIV_64
  49                 #if (F_CPU == 16000000)
  50                 , SPI_SPEED_FCPU_DIV_128
  51                 #endif
  52         };
  53
  54
  55 uint8_t V2Protocol_GetSPIPrescalerMask(void)
  56 {
  57         uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);
  58
  59         if (SCKDuration >= sizeof(SPIMaskFromSCKDuration))
  60           SCKDuration = (sizeof(SPIMaskFromSCKDuration) - 1);
  61
  62         return SPIMaskFromSCKDuration[SCKDuration];
  63 }
  64
  65 void V2Protocol_ChangeTargetResetLine(bool ResetTarget)
  66 {
  67         if (ResetTarget)
  68         {
  69                 RESET_LINE_DDR  |= RESET_LINE_MASK;
  70
  71                 if (!(V2Params_GetParameterValue(PARAM_RESET_POLARITY)))
  72                   RESET_LINE_PORT |= RESET_LINE_MASK;
  73         }
  74         else
  75         {
  76                 RESET_LINE_PORT &= ~RESET_LINE_MASK;
  77                 RESET_LINE_DDR  &= ~RESET_LINE_MASK;
  78         }
  79 }
  80
  81 void V2Protocol_DelayMS(uint8_t MS)
  82 {
  83         while (MS--)
  84           _delay_ms(1);
  85 }
  86
  87 uint8_t V2Protocol_WaitWhileTargetBusy(void)
  88 {
  89         uint8_t TimeoutMS = TARGET_BUSY_TIMEOUT_MS;
  90         uint8_t ResponseByte;
  91
  92         do
  93         {
  94                 V2Protocol_DelayMS(1);
  95
  96                 SPI_SendByte(0xF0);
  97                 SPI_SendByte(0x00);
  98
  99                 SPI_SendByte(0x00);
 100                 ResponseByte = SPI_ReceiveByte();
 101         }
 102         while ((ResponseByte & 0x01) && (TimeoutMS--));
 103
 104         if (!(TimeoutMS))
 105           return STATUS_CMD_TOUT;
 106         else
 107           return STATUS_CMD_OK;
 108 }
 109
 110 void V2Protocol_LoadExtendedAddress(void)
 111 {
 112         SPI_SendByte(0x4D);
 113         SPI_SendByte(0x00);
 114         SPI_SendByte((CurrentAddress & 0x00FF0000) >> 16);
 115         SPI_SendByte(0x00);
 116 }