PSoC3 EEPROM example

//config.h

/* ========================================
 *
 * Copyright YOUR COMPANY, THE YEAR
 * All Rights Reserved
 * UNPUBLISHED, LICENSED SOFTWARE.
 *
 * CONFIDENTIAL AND PROPRIETARY INFORMATION
 * WHICH IS THE PROPERTY OF your company.
 *
 * ========================================
*/
#ifndef CONFIG_H
#define CONFIG_H

#define EEPROM_CONFIG_LOCATION 0x00

//struct for storing Brix Meter config data
//note: should be no longer than 16 bytes for current storeConfig implementation
typedef struct _brix_Config
{
    uint16 u16hostTemperatureTenths;
    int16 i16slaveBrixMeasuredHundredths;
    uint16 u16slaveBrixNonZeroCalPointTenths;
    uint16 u16zeroCalCounts;
    uint16 u16nonzeroCalCounts;
    uint16 u16slavePumpStrengthFixed;
    uint16 u16slavePumpStrengthAuto;
    uint8 u8brixInitializedFlag; //Indicates that the device has been configured before. Leave at end of struct.
    uint8 u8fillerVar1; //variable to fill the 16 bytes
} brix_Config;

void storeConfig(void);

void recallConfig(void);

#endif
//[] END OF FILE

//config.c

/* ========================================
 *
 * Copyright YOUR COMPANY, THE YEAR
 * All Rights Reserved
 * UNPUBLISHED, LICENSED SOFTWARE.
 *
 * CONFIDENTIAL AND PROPRIETARY INFORMATION
 * WHICH IS THE PROPERTY OF your company.
 *
 * ========================================
*/
#include <device.h>
#include "config.h"
#include "main.h"
#include "brix.h"

brix_Config brixConfig = {0,0,0,0,0,0,0,0,0};
reg8 * EEPROMRegPointer = (reg8 *) CYDEV_EE_BASE;
reg8 * brixConfigPointer = &brixConfig.u16hostTemperatureTenths;


//function to store current brix configuration in EEPROM
void storeConfig(void)
{
    uint8 writeStatus;
    EEPROM_Start();
    //CySetTemp();
    writeStatus = EEPROM_Write(brixConfigPointer, EEPROM_CONFIG_LOCATION);

    if(writeStatus!=CYRET_SUCCESS)
    {
        if(writeStatus==CYRET_UNKNOWN)
        {
            //failure. do something?
            CY_NOP; //a no-op
        }
    }
}

//function to populate brix configuration from EEPROM
//should populate config with default values if un-initialized
void recallConfig(void)
{
    //recall from EEPROM
    int8 index;

    EEPROM_Start();

    for(index = 0; index < SIZEOF_EEPROM_ROW; index++)
    {
        brixConfigPointer[index] = EEPROMRegPointer[index];
    }

    //check for config initialization
    if(!brixConfig.u8brixInitializedFlag)
    {
        //initialize the configuration
        brixConfig.u16hostTemperatureTenths = 0;
        brixConfig.i16slaveBrixMeasuredHundredths = 0;
        brixConfig.u16slaveBrixNonZeroCalPointTenths = 0;
        brixConfig.u16zeroCalCounts = 0;
        brixConfig.u16nonzeroCalCounts = 0;
        //initially, the Brix Meter should be set up for automatic pump strength
        //MAXK: Fix this code
        //brixConfig.u16slavePumpStrengthFixed = HOST_PUMP_AUTO;
//      brixConfig.u16slavePumpStrengthAuto = PUMP_MEAS_DEFAULT;
        //set the initialized flag to show EEPROM has been populated
        brixConfig.u8brixInitializedFlag = TRUE;

        //write that configuration to EEPROM
        storeConfig();
    }
    //MAXK: populate I2C buffer here?
}

/* [] END OF FILE */