Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all 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 ISP Protocol decoder.
  34  */
  35
  36 #include "ISPTarget.h"
  37
  38 #if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)
  39
  40 /** Converts the given AVR Studio SCK duration parameter (set by a SET PARAM command from the host) to the nearest
  41  *  possible SPI clock prescaler mask for passing to the SPI_Init() routine.
  42  *
  43  *  \return Nearest SPI prescaler mask for the given SCK frequency
  44  */
  45 uint8_t ISPTarget_GetSPIPrescalerMask(void)
  46 {
  47         static const uint8_t SPIMaskFromSCKDuration[] =
  48         {
  49         #if (F_CPU == 8000000)
  50                 SPI_SPEED_FCPU_DIV_2,    // AVRStudio =   8MHz SPI, Actual =   4MHz SPI
  51                 SPI_SPEED_FCPU_DIV_2,    // AVRStudio =   4MHz SPI, Actual =   4MHz SPI
  52                 SPI_SPEED_FCPU_DIV_4,    // AVRStudio =   2MHz SPI, Actual =   2MHz SPI
  53                 SPI_SPEED_FCPU_DIV_8,    // AVRStudio =   1MHz SPI, Actual =   1MHz SPI
  54                 SPI_SPEED_FCPU_DIV_16,   // AVRStudio = 500KHz SPI, Actual = 500KHz SPI
  55                 SPI_SPEED_FCPU_DIV_32,   // AVRStudio = 250KHz SPI, Actual = 250KHz SPI
  56                 SPI_SPEED_FCPU_DIV_64,   // AVRStudio = 125KHz SPI, Actual = 125KHz SPI
  57         #elif (F_CPU == 16000000)
  58                 SPI_SPEED_FCPU_DIV_2,    // AVRStudio =   8MHz SPI, Actual =   8MHz SPI
  59                 SPI_SPEED_FCPU_DIV_4,    // AVRStudio =   4MHz SPI, Actual =   4MHz SPI
  60                 SPI_SPEED_FCPU_DIV_8,    // AVRStudio =   2MHz SPI, Actual =   2MHz SPI
  61                 SPI_SPEED_FCPU_DIV_16,   // AVRStudio =   1MHz SPI, Actual =   1MHz SPI
  62                 SPI_SPEED_FCPU_DIV_32,   // AVRStudio = 500KHz SPI, Actual = 500KHz SPI
  63                 SPI_SPEED_FCPU_DIV_64,   // AVRStudio = 250KHz SPI, Actual = 250KHz SPI
  64                 SPI_SPEED_FCPU_DIV_128   // AVRStudio = 125KHz SPI, Actual = 125KHz SPI
  65         #else
  66                 #error No SPI prescaler masks for chosen F_CPU speed.
  67         #endif
  68         };
  69
  70         uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);
  71
  72         if (SCKDuration >= sizeof(SPIMaskFromSCKDuration))
  73           SCKDuration = (sizeof(SPIMaskFromSCKDuration) - 1);
  74
  75         return SPIMaskFromSCKDuration[SCKDuration];
  76 }
  77
  78 /** Asserts or deasserts the target's reset line, using the correct polarity as set by the host using a SET PARAM command.
  79  *  When not asserted, the line is tristated so as not to interfere with normal device operation.
  80  *
  81  *  \param[in] ResetTarget Boolean true when the target should be held in reset, false otherwise
  82  */
  83 void ISPTarget_ChangeTargetResetLine(const bool ResetTarget)
  84 {
  85         if (ResetTarget)
  86         {
  87                 AUX_LINE_DDR |= AUX_LINE_MASK;
  88
  89                 if (!(V2Params_GetParameterValue(PARAM_RESET_POLARITY)))
  90                   AUX_LINE_PORT |= AUX_LINE_MASK;
  91         }
  92         else
  93         {
  94                 AUX_LINE_DDR  &= ~AUX_LINE_MASK;
  95                 AUX_LINE_PORT &= ~AUX_LINE_MASK;
  96         }
  97 }
  98
  99 /** Waits until the last issued target memory programming command has completed, via the check mode given and using
 100  *  the given parameters.
 101  *
 102  *  \param[in] ProgrammingMode  Programming mode used and completion check to use, a mask of PROG_MODE_* constants
 103  *  \param[in] PollAddress  Memory address to poll for completion if polling check mode used
 104  *  \param[in] PollValue  Poll value to check against if polling check mode used
 105  *  \param[in] DelayMS  Milliseconds to delay before returning if delay check mode used
 106  *  \param[in] ReadMemCommand  Device low-level READ MEMORY command to send if value check mode used
 107  *
 108  *  \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT or
 109  *          \ref STATUS_CMD_TOUT otherwise
 110  */
 111 uint8_t ISPTarget_WaitForProgComplete(const uint8_t ProgrammingMode, const uint16_t PollAddress, const uint8_t PollValue,
 112                                       const uint8_t DelayMS, const uint8_t ReadMemCommand)
 113 {
 114         uint8_t ProgrammingStatus  = STATUS_CMD_OK;
 115         uint8_t TimeoutMSRemaining = 100;
 116
 117         /* Determine method of Programming Complete check */
 118         switch (ProgrammingMode & ~(PROG_MODE_PAGED_WRITES_MASK | PROG_MODE_COMMIT_PAGE_MASK))
 119         {
 120                 case PROG_MODE_WORD_TIMEDELAY_MASK:
 121                 case PROG_MODE_PAGED_TIMEDELAY_MASK:
 122                         ISPProtocol_DelayMS(DelayMS);
 123                         break;
 124                 case PROG_MODE_WORD_VALUE_MASK:
 125                 case PROG_MODE_PAGED_VALUE_MASK:
 126                         do
 127                         {
 128                                 /* Manage software timeout */
 129                                 if (TIFR0 & (1 << OCF0A))
 130                                 {
 131                                         TIFR0 |= (1 << OCF0A);
 132                                         TimeoutMSRemaining--;
 133                                 }
 134
 135                                 SPI_SendByte(ReadMemCommand);
 136                                 SPI_SendByte(PollAddress >> 8);
 137                                 SPI_SendByte(PollAddress & 0xFF);
 138                         }
 139                         while ((SPI_TransferByte(0x00) == PollValue) && TimeoutMSRemaining);
 140
 141                         if (!(TimeoutMSRemaining))
 142                          ProgrammingStatus = STATUS_CMD_TOUT;
 143
 144                         break;
 145                 case PROG_MODE_WORD_READYBUSY_MASK:
 146                 case PROG_MODE_PAGED_READYBUSY_MASK:
 147                         ProgrammingStatus = ISPTarget_WaitWhileTargetBusy();
 148                         break;
 149         }
 150
 151         return ProgrammingStatus;
 152 }
 153
 154 /** Waits until the target has completed the last operation, by continuously polling the device's
 155  *  BUSY flag until it is cleared, or until the command timeout period has expired.
 156  *
 157  *  \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT otherwise
 158  */
 159 uint8_t ISPTarget_WaitWhileTargetBusy(void)
 160 {
 161         uint8_t TimeoutMSRemaining = 100;
 162
 163         do
 164         {
 165                 /* Manage software timeout */
 166                 if (TIFR0 & (1 << OCF0A))
 167                 {
 168                         TIFR0 |= (1 << OCF0A);
 169                         TimeoutMSRemaining--;
 170                 }
 171
 172                 SPI_SendByte(0xF0);
 173                 SPI_SendByte(0x00);
 174                 SPI_SendByte(0x00);
 175         }
 176         while ((SPI_ReceiveByte() & 0x01) && TimeoutMSRemaining);
 177
 178         return ((TimeoutMSRemaining) ? STATUS_CMD_OK : STATUS_RDY_BSY_TOUT);
 179 }
 180
 181 /** Sends a low-level LOAD EXTENDED ADDRESS command to the target, for addressing of memory beyond the
 182  *  64KB boundary. This sends the command with the correct address as indicated by the current address
 183  *  pointer variable set by the host when a SET ADDRESS command is issued.
 184  */
 185 void ISPTarget_LoadExtendedAddress(void)
 186 {
 187         SPI_SendByte(LOAD_EXTENDED_ADDRESS_CMD);
 188         SPI_SendByte(0x00);
 189         SPI_SendByte((CurrentAddress & 0x00FF0000) >> 16);
 190         SPI_SendByte(0x00);
 191 }
 192
 193 #endif