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208 lines
7.6 KiB
208 lines
7.6 KiB
8 years ago
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2017.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all 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 disclaims 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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static uint8_t EEMEM EEPROM_Reset_Polarity = 0x01;
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/* Non-Volatile Parameter Values for EEPROM storage */
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static uint8_t EEMEM EEPROM_SCK_Duration = 0x06;
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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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.ParamPrivileges = PARAM_PRIV_READ,
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.ParamValue = 0 },
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{ .ParamID = PARAM_BUILD_NUMBER_HIGH,
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.ParamPrivileges = PARAM_PRIV_READ,
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.ParamValue = 0 },
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{ .ParamID = PARAM_HW_VER,
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.ParamPrivileges = PARAM_PRIV_READ,
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.ParamValue = 0x00 },
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{ .ParamID = PARAM_SW_MAJOR,
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.ParamPrivileges = PARAM_PRIV_READ,
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.ParamValue = 0x01 },
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{ .ParamID = PARAM_SW_MINOR,
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.ParamPrivileges = PARAM_PRIV_READ,
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.ParamValue = FIRMWARE_VERSION_MINOR },
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{ .ParamID = PARAM_VTARGET,
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.ParamPrivileges = PARAM_PRIV_READ,
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.ParamValue = (uint8_t)(3.3 * 10) },
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{ .ParamID = PARAM_SCK_DURATION,
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.ParamPrivileges = PARAM_PRIV_READ | PARAM_PRIV_WRITE,
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.ParamValue = 6 },
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{ .ParamID = PARAM_RESET_POLARITY,
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.ParamPrivileges = PARAM_PRIV_READ | PARAM_PRIV_WRITE,
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.ParamValue = 0x01 },
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{ .ParamID = PARAM_STATUS_TGT_CONN,
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.ParamPrivileges = PARAM_PRIV_READ,
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.ParamValue = STATUS_ISP_READY },
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{ .ParamID = PARAM_DISCHARGEDELAY,
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.ParamPrivileges = PARAM_PRIV_READ | PARAM_PRIV_WRITE,
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.ParamValue = 0x00 },
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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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/* Read parameter values that are stored in non-volatile EEPROM */
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uint8_t ResetPolarity = eeprom_read_byte(&EEPROM_Reset_Polarity);
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uint8_t SCKDuration = eeprom_read_byte(&EEPROM_SCK_Duration);
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/* Update current parameter table if the EEPROM contents was not blank */
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if (ResetPolarity != 0xFF)
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V2Params_GetParamFromTable(PARAM_RESET_POLARITY)->ParamValue = ResetPolarity;
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/* Update current parameter table if the EEPROM contents was not blank */
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if (SCKDuration != 0xFF)
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V2Params_GetParamFromTable(PARAM_SCK_DURATION)->ParamValue = SCKDuration;
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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) && !defined(NO_VTARGET_DETECT))
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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 = (((uint16_t)(VTARGET_REF_VOLTS * 10 * VTARGET_SCALE_FACTOR) * 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 \c 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* const 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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* \note This function does not first check for read privileges - if the value is being sent to the host via a
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* GET PARAM command, \ref V2Params_GetParameterPrivileges() should be called first to ensure that the
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* parameter is host-readable.
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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* const ParamInfo = V2Params_GetParamFromTable(ParamID);
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if (ParamInfo == NULL)
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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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* \note This function does not first check for write privileges - if the value is being sourced from the host
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* via a SET PARAM command, \ref V2Params_GetParameterPrivileges() should be called first to ensure that the
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* parameter is host-writable.
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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,
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const uint8_t Value)
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{
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ParameterItem_t* const ParamInfo = V2Params_GetParamFromTable(ParamID);
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if (ParamInfo == NULL)
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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_update_byte(&EEPROM_Reset_Polarity, Value);
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/* The target SCK line period is a non-volatile parameter, save to EEPROM when changed */
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if (ParamID == PARAM_SCK_DURATION)
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eeprom_update_byte(&EEPROM_SCK_Duration, 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* const V2Params_GetParamFromTable(const uint8_t ParamID)
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{
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ParameterItem_t* CurrTableItem = ParameterTable;
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/* Find the parameter in the parameter table if present */
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for (uint8_t TableIndex = 0; TableIndex < TABLE_PARAM_COUNT; TableIndex++)
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{
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if (ParamID == CurrTableItem->ParamID)
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return CurrTableItem;
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CurrTableItem++;
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}
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return NULL;
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}
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