Projects/AVRISP-MKII/Lib/V2ProtocolParams.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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  *  V2Protocol parameter handler, to process V2 Protocol device parameters.
  34  */
  35
  36 #define  INCLUDE_FROM_V2PROTOCOL_PARAMS_C
  37 #include "V2ProtocolParams.h"
  38
  39 /* Non-Volatile Parameter Values for EEPROM storage */
  40 static uint8_t EEMEM EEPROM_Rest_Polarity = 0x00;
  41
  42 /* Volatile Parameter Values for RAM storage */
  43 static ParameterItem_t ParameterTable[] =
  44         {
  45                 { .ParamID          = PARAM_BUILD_NUMBER_LOW,
  46                   .ParamPrivileges  = PARAM_PRIV_READ,
  47                   .ParamValue       = 0                                  },
  48
  49                 { .ParamID          = PARAM_BUILD_NUMBER_HIGH,
  50                   .ParamPrivileges  = PARAM_PRIV_READ,
  51                   .ParamValue       = 0                                  },
  52
  53                 { .ParamID          = PARAM_HW_VER,
  54                   .ParamPrivileges  = PARAM_PRIV_READ,
  55                   .ParamValue       = 0x00                               },
  56
  57                 { .ParamID          = PARAM_SW_MAJOR,
  58                   .ParamPrivileges  = PARAM_PRIV_READ,
  59                   .ParamValue       = 0x01                               },
  60
  61                 { .ParamID          = PARAM_SW_MINOR,
  62                   .ParamPrivileges  = PARAM_PRIV_READ,
  63                   .ParamValue       = 0x0D                               },
  64
  65                 { .ParamID          = PARAM_VTARGET,
  66                   .ParamPrivileges  = PARAM_PRIV_READ,
  67                   .ParamValue       = 0x32                               },
  68
  69                 { .ParamID          = PARAM_SCK_DURATION,
  70                   .ParamPrivileges  = PARAM_PRIV_READ | PARAM_PRIV_WRITE,
  71                   .ParamValue       = 6                                  },
  72
  73                 { .ParamID          = PARAM_RESET_POLARITY,
  74                   .ParamPrivileges  = PARAM_PRIV_WRITE,
  75                   .ParamValue       = 0x01                               },
  76
  77                 { .ParamID          = PARAM_STATUS_TGT_CONN,
  78                   .ParamPrivileges  = PARAM_PRIV_READ,
  79                   .ParamValue       = STATUS_ISP_READY                   },
  80
  81                 { .ParamID          = PARAM_DISCHARGEDELAY,
  82                   .ParamPrivileges  = PARAM_PRIV_WRITE,
  83                   .ParamValue       = 0x00                               },
  84         };
  85
  86
  87 /** Loads saved non-volatile parameter values from the EEPROM into the parameter table, as needed. */
  88 void V2Params_LoadNonVolatileParamValues(void)
  89 {
  90         /* Target RESET line polarity is a non-volatile value, retrieve current parameter value from EEPROM */
  91         V2Params_GetParamFromTable(PARAM_RESET_POLARITY)->ParamValue = eeprom_read_byte(&EEPROM_Rest_Polarity);
  92 }
  93
  94 /** Updates any parameter values that are sourced from hardware rather than explicitly set by the host, such as
  95  *  VTARGET levels from the ADC on supported AVR models.
  96  */
  97 void V2Params_UpdateParamValues(void)
  98 {
  99         #if (defined(ADC) && !defined(NO_VTARGET_DETECT))
 100         /* Update VTARGET parameter with the latest ADC conversion of VTARGET on supported AVR models */
 101         V2Params_GetParamFromTable(PARAM_VTARGET)->ParamValue = (((uint16_t)(VTARGET_REF_VOLTS * 10 * VTARGET_SCALE_FACTOR) * ADC_GetResult()) / 1024);
 102         #endif
 103 }
 104
 105 /** Retrieves the host PC read/write privileges for a given parameter in the parameter table. This should
 106  *  be called before calls to \ref V2Params_GetParameterValue() or \ref V2Params_SetParameterValue() when
 107  *  getting or setting parameter values in response to requests from the host.
 108  *
 109  *  \param[in] ParamID  Parameter ID whose privileges are to be retrieved from the table
 110  *
 111  *  \return Privileges for the requested parameter, as a mask of PARAM_PRIV_* masks
 112  */
 113 uint8_t V2Params_GetParameterPrivileges(const uint8_t ParamID)
 114 {
 115         ParameterItem_t* ParamInfo = V2Params_GetParamFromTable(ParamID);
 116
 117         if (ParamInfo == NULL)
 118           return 0;
 119
 120         return ParamInfo->ParamPrivileges;
 121 }
 122
 123 /** Retrieves the current value for a given parameter in the parameter table.
 124  *
 125  *  \note This function does not first check for read privileges - if the value is being sent to the host via a
 126  *        GET PARAM command, \ref V2Params_GetParameterPrivileges() should be called first to ensure that the
 127  *        parameter is host-readable.
 128  *
 129  *  \param[in] ParamID  Parameter ID whose value is to be retrieved from the table
 130  *
 131  *  \return Current value of the parameter in the table, or 0 if not found
 132  */
 133 uint8_t V2Params_GetParameterValue(const uint8_t ParamID)
 134 {
 135         ParameterItem_t* ParamInfo = V2Params_GetParamFromTable(ParamID);
 136
 137         if (ParamInfo == NULL)
 138           return 0;
 139
 140         return ParamInfo->ParamValue;
 141 }
 142
 143 /** Sets the value for a given parameter in the parameter table.
 144  *
 145  *  \note This function does not first check for write privileges - if the value is being sourced from the host
 146  *        via a SET PARAM command, \ref V2Params_GetParameterPrivileges() should be called first to ensure that the
 147  *        parameter is host-writable.
 148  *
 149  *  \param[in] ParamID  Parameter ID whose value is to be set in the table
 150  *  \param[in] Value    New value to set the parameter to
 151  *
 152  *  \return Pointer to the associated parameter information from the parameter table if found, NULL otherwise
 153  */
 154 void V2Params_SetParameterValue(const uint8_t ParamID,
 155                                 const uint8_t Value)
 156 {
 157         ParameterItem_t* ParamInfo = V2Params_GetParamFromTable(ParamID);
 158
 159         if (ParamInfo == NULL)
 160           return;
 161
 162         ParamInfo->ParamValue = Value;
 163
 164         /* The target RESET line polarity is a non-volatile parameter, save to EEPROM when changed */
 165         if (ParamID == PARAM_RESET_POLARITY)
 166           eeprom_update_byte(&EEPROM_Rest_Polarity, Value);
 167 }
 168
 169 /** Retrieves a parameter entry (including ID, value and privileges) from the parameter table that matches the given
 170  *  parameter ID.
 171  *
 172  *  \param[in] ParamID  Parameter ID to find in the table
 173  *
 174  *  \return Pointer to the associated parameter information from the parameter table if found, NULL otherwise
 175  */
 176 static ParameterItem_t* V2Params_GetParamFromTable(const uint8_t ParamID)
 177 {
 178         ParameterItem_t* CurrTableItem = ParameterTable;
 179
 180         /* Find the parameter in the parameter table if present */
 181         for (uint8_t TableIndex = 0; TableIndex < TABLE_PARAM_COUNT; TableIndex++)
 182         {
 183                 if (ParamID == CurrTableItem->ParamID)
 184                   return CurrTableItem;
 185
 186                 CurrTableItem++;
 187         }
 188
 189         return NULL;
 190 }
 191