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The EEPROM stream read/write functions now use eeprom_update_byte() instead of eeprom_write_byte(), so that only changed bytes are written to EEPROM to preserve its lifespan.

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Changed over the AVRISP-MKII and TemperatureDataLogger projects to use eeprom_update_byte() when writing non-volatile parameters to EEPROM to preserve its lifespan.
This commit is contained in:
Dean Camera 2010-05-26 11:54:55 +00:00
parent bb9fb1051c
commit 670413603f
6 changed files with 23 additions and 10 deletions
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14
Projects/AVRISP-MKII/Lib/V2ProtocolParams.c
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@ -98,7 +98,7 @@ void V2Params_UpdateParamValues(void)
{
#if (defined(ADC) && !defined(NO_VTARGET_DETECT))
/* Update VTARGET parameter with the latest ADC conversion of VTARGET on supported AVR models */
V2Params_GetParamFromTable(PARAM_VTARGET)->ParamValue = ((5 * 10 * ADC_GetResult()) / 1024);
V2Params_SetParameterValue(PARAM_VTARGET, ((5 * 10 * ADC_GetResult()) / 1024));
#endif
}
@ -121,6 +121,10 @@ uint8_t V2Params_GetParameterPrivileges(const uint8_t ParamID)
}
/** Retrieves the current value for a given parameter in the parameter table.
*
* \note This function does not first check for read privileges - if the value is being sent to the host via a
* GET PARAM command, \ref V2Params_GetParameterPrivileges() should be called first to ensure that the
* parameter is host-readable.
*
* \param[in] ParamID Parameter ID whose value is to be retrieved from the table
*
@ -137,6 +141,10 @@ uint8_t V2Params_GetParameterValue(const uint8_t ParamID)
}
/** Sets the value for a given parameter in the parameter table.
*
* \note This function does not first check for write privileges - if the value is being sourced from the host
* via a SET PARAM command, \ref V2Params_GetParameterPrivileges() should be called first to ensure that the
* parameter is host-writable.
*
* \param[in] ParamID Parameter ID whose value is to be set in the table
* \param[in] Value New value to set the parameter to
@ -153,8 +161,8 @@ void V2Params_SetParameterValue(const uint8_t ParamID, const uint8_t Value)
ParamInfo->ParamValue = Value;
/* The target RESET line polarity is a non-volatile parameter, save to EEPROM when changed */
if ((ParamID == PARAM_RESET_POLARITY) && (eeprom_read_byte(&EEPROM_Rest_Polarity) != Value))
eeprom_write_byte(&EEPROM_Rest_Polarity, Value);
if (ParamID == PARAM_RESET_POLARITY)
eeprom_update_byte(&EEPROM_Rest_Polarity, Value);
}
/** Retrieves a parameter entry (including ID, value and privileges) from the parameter table that matches the given