Projects/AVRISP-MKII/Lib/V2ProtocolParams.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  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 disclaims 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_Reset_Polarity = 0x01;
  41
  42 /* Non-Volatile Parameter Values for EEPROM storage */
  43 static uint8_t EEMEM EEPROM_SCK_Duration   = 0x06;
  44
  45 /* Volatile Parameter Values for RAM storage */
  46 static ParameterItem_t ParameterTable[] =
  47         {
  48                 { .ParamID          = PARAM_BUILD_NUMBER_LOW,
  49                   .ParamPrivileges  = PARAM_PRIV_READ,
  50                   .ParamValue       = 0                                  },
  51
  52                 { .ParamID          = PARAM_BUILD_NUMBER_HIGH,
  53                   .ParamPrivileges  = PARAM_PRIV_READ,
  54                   .ParamValue       = 0                                  },
  55
  56                 { .ParamID          = PARAM_HW_VER,
  57                   .ParamPrivileges  = PARAM_PRIV_READ,
  58                   .ParamValue       = 0x00                               },
  59
  60                 { .ParamID          = PARAM_SW_MAJOR,
  61                   .ParamPrivileges  = PARAM_PRIV_READ,
  62                   .ParamValue       = 0x01                               },
  63
  64                 { .ParamID          = PARAM_SW_MINOR,
  65                   .ParamPrivileges  = PARAM_PRIV_READ,
  66                   .ParamValue       = FIRMWARE_VERSION_MINOR             },
  67
  68                 { .ParamID          = PARAM_VTARGET,
  69                   .ParamPrivileges  = PARAM_PRIV_READ,
  70                   .ParamValue       = (uint8_t)(3.3 * 10)                },
  71
  72                 { .ParamID          = PARAM_SCK_DURATION,
  73                   .ParamPrivileges  = PARAM_PRIV_READ | PARAM_PRIV_WRITE,
  74                   .ParamValue       = 6                                  },
  75
  76                 { .ParamID          = PARAM_RESET_POLARITY,
  77                   .ParamPrivileges  = PARAM_PRIV_READ | PARAM_PRIV_WRITE,
  78                   .ParamValue       = 0x01                               },
  79
  80                 { .ParamID          = PARAM_STATUS_TGT_CONN,
  81                   .ParamPrivileges  = PARAM_PRIV_READ,
  82                   .ParamValue       = STATUS_ISP_READY                   },
  83
  84                 { .ParamID          = PARAM_DISCHARGEDELAY,
  85                   .ParamPrivileges  = PARAM_PRIV_READ | PARAM_PRIV_WRITE,
  86                   .ParamValue       = 0x00                               },
  87         };
  88
  89
  90 /** Loads saved non-volatile parameter values from the EEPROM into the parameter table, as needed. */
  91 void V2Params_LoadNonVolatileParamValues(void)
  92 {
  93         /* Read parameter values that are stored in non-volatile EEPROM */
  94         uint8_t ResetPolarity = eeprom_read_byte(&EEPROM_Reset_Polarity);
  95         uint8_t SCKDuration   = eeprom_read_byte(&EEPROM_SCK_Duration);
  96
  97         /* Update current parameter table if the EEPROM contents was not blank */
  98         if (ResetPolarity != 0xFF)
  99           V2Params_GetParamFromTable(PARAM_RESET_POLARITY)->ParamValue = ResetPolarity;
 100
 101         /* Update current parameter table if the EEPROM contents was not blank */
 102         if (SCKDuration != 0xFF)
 103           V2Params_GetParamFromTable(PARAM_SCK_DURATION)->ParamValue   = SCKDuration;
 104 }
 105
 106 /** Updates any parameter values that are sourced from hardware rather than explicitly set by the host, such as
 107  *  VTARGET levels from the ADC on supported AVR models.
 108  */
 109 void V2Params_UpdateParamValues(void)
 110 {
 111         #if (defined(ADC) && !defined(NO_VTARGET_DETECT))
 112         /* Update VTARGET parameter with the latest ADC conversion of VTARGET on supported AVR models */
 113         V2Params_GetParamFromTable(PARAM_VTARGET)->ParamValue = (((uint16_t)(VTARGET_REF_VOLTS * 10 * VTARGET_SCALE_FACTOR) * ADC_GetResult()) / 1024);
 114         #endif
 115 }
 116
 117 /** Retrieves the host PC read/write privileges for a given parameter in the parameter table. This should
 118  *  be called before calls to \ref V2Params_GetParameterValue() or \ref V2Params_SetParameterValue() when
 119  *  getting or setting parameter values in response to requests from the host.
 120  *
 121  *  \param[in] ParamID  Parameter ID whose privileges are to be retrieved from the table
 122  *
 123  *  \return Privileges for the requested parameter, as a mask of \c PARAM_PRIV_* masks
 124  */
 125 uint8_t V2Params_GetParameterPrivileges(const uint8_t ParamID)
 126 {
 127         ParameterItem_t* const ParamInfo = V2Params_GetParamFromTable(ParamID);
 128
 129         if (ParamInfo == NULL)
 130           return 0;
 131
 132         return ParamInfo->ParamPrivileges;
 133 }
 134
 135 /** Retrieves the current value for a given parameter in the parameter table.
 136  *
 137  *  \note This function does not first check for read privileges - if the value is being sent to the host via a
 138  *        GET PARAM command, \ref V2Params_GetParameterPrivileges() should be called first to ensure that the
 139  *        parameter is host-readable.
 140  *
 141  *  \param[in] ParamID  Parameter ID whose value is to be retrieved from the table
 142  *
 143  *  \return Current value of the parameter in the table, or 0 if not found
 144  */
 145 uint8_t V2Params_GetParameterValue(const uint8_t ParamID)
 146 {
 147         ParameterItem_t* const ParamInfo = V2Params_GetParamFromTable(ParamID);
 148
 149         if (ParamInfo == NULL)
 150           return 0;
 151
 152         return ParamInfo->ParamValue;
 153 }
 154
 155 /** Sets the value for a given parameter in the parameter table.
 156  *
 157  *  \note This function does not first check for write privileges - if the value is being sourced from the host
 158  *        via a SET PARAM command, \ref V2Params_GetParameterPrivileges() should be called first to ensure that the
 159  *        parameter is host-writable.
 160  *
 161  *  \param[in] ParamID  Parameter ID whose value is to be set in the table
 162  *  \param[in] Value    New value to set the parameter to
 163  *
 164  *  \return Pointer to the associated parameter information from the parameter table if found, NULL otherwise
 165  */
 166 void V2Params_SetParameterValue(const uint8_t ParamID,
 167                                 const uint8_t Value)
 168 {
 169         ParameterItem_t* const ParamInfo = V2Params_GetParamFromTable(ParamID);
 170
 171         if (ParamInfo == NULL)
 172           return;
 173
 174         ParamInfo->ParamValue = Value;
 175
 176         /* The target RESET line polarity is a non-volatile parameter, save to EEPROM when changed */
 177         if (ParamID == PARAM_RESET_POLARITY)
 178           eeprom_update_byte(&EEPROM_Reset_Polarity, Value);
 179
 180         /* The target SCK line period is a non-volatile parameter, save to EEPROM when changed */
 181         if (ParamID == PARAM_SCK_DURATION)
 182           eeprom_update_byte(&EEPROM_SCK_Duration, Value);
 183 }
 184
 185 /** Retrieves a parameter entry (including ID, value and privileges) from the parameter table that matches the given
 186  *  parameter ID.
 187  *
 188  *  \param[in] ParamID  Parameter ID to find in the table
 189  *
 190  *  \return Pointer to the associated parameter information from the parameter table if found, NULL otherwise
 191  */
 192 static ParameterItem_t* const V2Params_GetParamFromTable(const uint8_t ParamID)
 193 {
 194         ParameterItem_t* CurrTableItem = ParameterTable;
 195
 196         /* Find the parameter in the parameter table if present */
 197         for (uint8_t TableIndex = 0; TableIndex < TABLE_PARAM_COUNT; TableIndex++)
 198         {
 199                 if (ParamID == CurrTableItem->ParamID)
 200                   return CurrTableItem;
 201
 202                 CurrTableItem++;
 203         }
 204
 205         return NULL;
 206 }
 207