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179 lines
6.6 KiB
C
179 lines
6.6 KiB
C
/*
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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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* V2Protocol parameter handler, to process V2 Protocol device parameters.
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*/
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#define INCLUDE_FROM_V2PROTOCOL_PARAMS_C
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#include "V2ProtocolParams.h"
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/* Non-Volatile Parameter Values for EEPROM storage */
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uint8_t EEMEM EEPROM_Rest_Polarity = 0x00;
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/* Volatile Parameter Values for RAM storage */
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static ParameterItem_t ParameterTable[] =
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{
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{ .ParamID = PARAM_BUILD_NUMBER_LOW,
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.ParamValue = (LUFA_VERSION_INTEGER >> 8),
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.ParamPrivileges = PARAM_PRIV_READ },
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{ .ParamID = PARAM_BUILD_NUMBER_HIGH,
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.ParamValue = (LUFA_VERSION_INTEGER & 0xFF),
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.ParamPrivileges = PARAM_PRIV_READ },
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{ .ParamID = PARAM_HW_VER,
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.ParamValue = 0x00,
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.ParamPrivileges = PARAM_PRIV_READ },
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{ .ParamID = PARAM_SW_MAJOR,
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.ParamValue = 0x01,
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.ParamPrivileges = PARAM_PRIV_READ },
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{ .ParamID = PARAM_SW_MINOR,
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.ParamValue = 0x0C,
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.ParamPrivileges = PARAM_PRIV_READ },
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{ .ParamID = PARAM_VTARGET,
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.ParamValue = 0x32,
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.ParamPrivileges = PARAM_PRIV_READ },
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{ .ParamID = PARAM_SCK_DURATION,
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.ParamValue = (TOTAL_ISP_PROGRAMMING_SPEEDS - 1),
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.ParamPrivileges = PARAM_PRIV_READ | PARAM_PRIV_WRITE },
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{ .ParamID = PARAM_RESET_POLARITY,
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.ParamValue = 0x00,
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.ParamPrivileges = PARAM_PRIV_WRITE },
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{ .ParamID = PARAM_STATUS_TGT_CONN,
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.ParamValue = 0x00,
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.ParamPrivileges = PARAM_PRIV_READ },
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{ .ParamID = PARAM_DISCHARGEDELAY,
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.ParamValue = 0x00,
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.ParamPrivileges = PARAM_PRIV_WRITE },
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};
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/** Loads saved non-volatile parameter values from the EEPROM into the parameter table, as needed. */
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void V2Params_LoadNonVolatileParamValues(void)
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{
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/* Target RESET line polarity is a non-volatile value, retrieve current parameter value from EEPROM -
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* NB: Cannot call V2Protocol_SetParameterValue() here, as that will cause another EEPROM write! */
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V2Params_GetParamFromTable(PARAM_RESET_POLARITY)->ParamValue = eeprom_read_byte(&EEPROM_Rest_Polarity);
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}
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/** Updates any parameter values that are sourced from hardware rather than explicitly set by the host, such as
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* VTARGET levels from the ADC on supported AVR models.
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*/
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void V2Params_UpdateParamValues(void)
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{
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#if defined(ADC)
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/* Update VTARGET parameter with the latest ADC conversion of VTARGET on supported AVR models */
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V2Params_GetParamFromTable(PARAM_VTARGET)->ParamValue = ((5 * 10 * ADC_GetResult()) / 1024);
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#endif
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}
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/** Retrieves the host PC read/write privileges for a given parameter in the parameter table. This should
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* be called before calls to \ref V2Params_GetParameterValue() or \ref V2Params_SetParameterValue() when
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* getting or setting parameter values in response to requests from the host.
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*
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* \param[in] ParamID Parameter ID whose privileges are to be retrieved from the table
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*
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* \return Privileges for the requested parameter, as a mask of PARAM_PRIV_* masks
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*/
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uint8_t V2Params_GetParameterPrivileges(const uint8_t ParamID)
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{
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ParameterItem_t* ParamInfo = V2Params_GetParamFromTable(ParamID);
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if (ParamInfo == NULL)
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return 0;
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return ParamInfo->ParamPrivileges;
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}
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/** Retrieves the current value for a given parameter in the parameter table.
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*
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* \param[in] ParamID Parameter ID whose value is to be retrieved from the table
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*
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* \return Current value of the parameter in the table, or 0 if not found
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*/
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uint8_t V2Params_GetParameterValue(const uint8_t ParamID)
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{
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ParameterItem_t* ParamInfo = V2Params_GetParamFromTable(ParamID);
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if ((ParamInfo == NULL) || !(ParamInfo->ParamPrivileges & PARAM_PRIV_READ))
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return 0;
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return ParamInfo->ParamValue;
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}
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/** Sets the value for a given parameter in the parameter table.
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*
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* \param[in] ParamID Parameter ID whose value is to be set in the table
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* \param[in] Value New value to set the parameter to
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*
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* \return Pointer to the associated parameter information from the parameter table if found, NULL otherwise
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*/
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void V2Params_SetParameterValue(const uint8_t ParamID, const uint8_t Value)
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{
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ParameterItem_t* ParamInfo = V2Params_GetParamFromTable(ParamID);
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if ((ParamInfo == NULL) || !(ParamInfo->ParamPrivileges & PARAM_PRIV_WRITE))
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return;
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ParamInfo->ParamValue = Value;
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/* The target RESET line polarity is a non-volatile parameter, save to EEPROM when changed */
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if (ParamID == PARAM_RESET_POLARITY)
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eeprom_write_byte(&EEPROM_Rest_Polarity, Value);
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}
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/** Retrieves a parameter entry (including ID, value and privileges) from the parameter table that matches the given
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* parameter ID.
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*
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* \param[in] ParamID Parameter ID to find in the table
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*
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* \return Pointer to the associated parameter information from the parameter table if found, NULL otherwise
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*/
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static ParameterItem_t* V2Params_GetParamFromTable(const uint8_t ParamID)
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{
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/* Find the parameter in the parameter table if present */
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for (uint8_t TableIndex = 0; TableIndex < (sizeof(ParameterTable) / sizeof(ParameterTable[0])); TableIndex++)
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{
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if (ParamID == ParameterTable[TableIndex].ParamID)
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return &ParameterTable[TableIndex];
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}
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return NULL;
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}
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