Subversion Repositories NaviCtrl

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/* !!! THIS IS NOT FREE SOFTWARE !!!                                                     */

/*#######################################################################################*/

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// + Copyright (c) 2008 Ingo Busker, Holger Buss

// + Nur für den privaten Gebrauch / NON-COMMERCIAL USE ONLY

// + FOR NON COMMERCIAL USE ONLY

// + www.MikroKopter.com

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation),

// + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist.

// + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt

// + bzgl. der Nutzungsbedingungen aufzunehmen.

// + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen,

// + Verkauf von Luftbildaufnahmen, usw.

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht,

// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts

// + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de"

// + eindeutig als Ursprung verlinkt werden

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion

// + Benutzung auf eigene Gefahr

// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// + Die Portierung oder Nutzung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur

// + mit unserer Zustimmung zulässig

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// + Redistributions of source code (with or without modifications) must retain the above copyright notice,

// + this list of conditions and the following disclaimer.

// +   * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived

// +     from this software without specific prior written permission.

// +   * The use of this project (hardware, software, binary files, sources and documentation) is only permitted

// +     for non-commercial use (directly or indirectly)

// +     Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted

// +     with our written permission

// +   * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be

// +     clearly linked as origin

// +   * porting the sources to other systems or using the software on other systems (except hardware from www.mikrokopter.de) is not allowed

//

// +  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

// +  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

// +  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

// +  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

// +  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

// +  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

// +  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

// +  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

// +  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

// +  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// +  POSSIBILITY OF SUCH DAMAGE.

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

#include <string.h>

#include <stdio.h>

#include "91x_lib.h"

#include "i2c.h"

#include "uart1.h"

#include "timer1.h"

#include "eeprom.h"

#include "led.h"

// The EEPROM M24C64 (64k) ist connected via I2C1 interface to the controller.

// The E0, E2, E3 pins are set to low. Therefore the slave adressbits b3, b2, b1 are 0.

#define EEPROM_I2C_ADDRESS      0xA0

#define EEPROM_SIZE                     65536L  // 64k bytes

#define EEPROM_WRITE            1

#define EEPROM_READ                     0

// timing

#define I2C_IDLE_TIMEOUT                150 // 150 ms

#define I2C_TRANSFER_TIMEOUT    150 // 150 ms

#define I2C_ACCESS_RETRYS               20      // retry 20 times

// globals for rx handler

volatile u8     *EEPROM_pData = 0;

volatile u16 EEPROM_DataLen = 0;

// rx data handler for eeprom data read access

void EEPROM_RxDataHandler(u8* pRxBuffer, u8 RxBufferSize)

{       // if number of byte are matching

        if((RxBufferSize == EEPROM_DataLen))

        {       //copy data from primary buffer to target buffer 

                if(EEPROM_pData) memcpy((u8*)EEPROM_pData, pRxBuffer, EEPROM_DataLen);

        }        

}

// ----------------------------------------------------------------------------------------

EEPROM_Result_t EEPROM_Transfer(u8 Direction, u16 Address, u8 *pData, u16 DataLen)

{

        u16 i, TxBytes = 0;

        u8 retry = 0;

        EEPROM_Result_t retval = EEPROM_ERROR_UNKNOWN;

        if(((u32)Address + (u32)DataLen) >= (EEPROM_SIZE - 1))

        {

                retval = EEPROM_ERROR_OUT_OF_ADDRESS_RANGE;

                return(retval);

        }

        if((DataLen+2) > I2C_BUFFER_LEN)

        {

                retval = EEPROM_I2C_BUFFER_OVERRUN;

                return(retval);

        }

        do

        {

                if(!I2C_LockBuffer(I2C_IDLE_TIMEOUT)) return EEPROM_ERROR_I2C_IDLE_TIMEOUT;

                // buffer is now locked

                TxBytes = 0;

                // transmitt address

                I2C_Buffer[TxBytes++] = (u8)(0x00FF & (Address>>8));

                I2C_Buffer[TxBytes++] = (u8)(0x00FF & Address);

                if(Direction == EEPROM_WRITE)

                {       // copy data to i2c transfer buffer

                        for(i = 0; i<DataLen;i++)

                        {

                                I2C_Buffer[TxBytes++] = pData[i];

                        }

                        // prepare pointer to rx data

                        EEPROM_pData = 0;

                        EEPROM_DataLen = 0;

                        // start transmission

                        if(!I2C_Transmission(EEPROM_I2C_ADDRESS, TxBytes, 0, 0))

                        {

                                return(retval);

                        }

                }

                else // Direction == EEPROM_READ

                {

                        // prepare pointer to rx data

                        EEPROM_pData = pData;

                        EEPROM_DataLen = DataLen;

                        // start transmission

                        if(!I2C_Transmission(EEPROM_I2C_ADDRESS, TxBytes, &EEPROM_RxDataHandler, DataLen))

                        {

                                return(retval);

                        }

                }

                //wait for end of this transfer

                if(I2C_WaitForEndOfTransmission(I2C_TRANSFER_TIMEOUT))

                {

                        if(I2C_Error == I2C_ERROR_NONE) return(EEPROM_SUCCESS);

                        else retval = EEPROM_DATA_TRANSFER_INCOMPLETE;

                }

                else// i2c transfer timed out

                {

                        return(EEPROM_ERROR_I2C_TRANSFER_TIMEOUT);     

                }

                // or retry             

        } while(++retry < I2C_ACCESS_RETRYS);

        return(retval);

}

EEPROM_Result_t EEPROM_WriteBlock(u16 Address, u8 *pData, u16 DataLen)

{

        u16 len;

        EEPROM_Result_t retval;

        // there can be 32 bytes written in a single cycle if the adresses are locates in the same row

        // i.e. the upper 11 bits of the addres are constant

        #define EEPROM_WRITE_BLOCK_SIZE 32

        len = EEPROM_WRITE_BLOCK_SIZE - Address%EEPROM_WRITE_BLOCK_SIZE; // number of bytes to match the next row

        if(len >= DataLen) len = DataLen; // do not write more than neccesarry

        do

        {

                retval = EEPROM_Transfer(EEPROM_WRITE, Address, pData, len);

                Address += len; // Address of the next row

                pData += len;   // pointer to start of next data block

                DataLen -= len; // reduce the number of to be transmitted

                if(DataLen > EEPROM_WRITE_BLOCK_SIZE) len = EEPROM_WRITE_BLOCK_SIZE; // limit next block size to 32

                else len = DataLen;

        }

        while(DataLen && (retval == EEPROM_SUCCESS)); // repeat until all data have been sent and no error has occured

        return(retval);

}

// a data block can be subsequently read after setting the start address once

EEPROM_Result_t EEPROM_ReadBlock(u16 Address, u8 *pData, u16 DataLen)

{

        EEPROM_Result_t retval = EEPROM_ERROR_UNKNOWN;

        u16 AdrOffset = 0;

        u16 RxLen;

        while(DataLen > 0)

        {

                if(DataLen > I2C_BUFFER_LEN) RxLen = I2C_BUFFER_LEN;

                else RxLen = DataLen;

                retval = EEPROM_Transfer(EEPROM_READ, Address+AdrOffset, &(pData[AdrOffset]), RxLen);

                if(retval != EEPROM_SUCCESS) break;

                AdrOffset += RxLen;

                DataLen -= RxLen;

        }

        return(retval);

}

u8 EEPROM_Init(void)

{

        u8 data[20];

        u8 i, retval = 0;

        UART1_PutString("\r\n EEprom init..");

        // check if data can be read from eeprom

        for(i=0;i<10;i++)

        {

                UART1_Putchar('.');

                if(EEPROM_SUCCESS == EEPROM_ReadBlock(0, data, 20)) retval = 1;

                if(retval) break;              

        }

        if(retval)  UART1_PutString("ok");

        else            UART1_PutString("failed");

        return(retval);

}