0,0 → 1,220 |
/*#######################################################################################*/ |
/* !!! 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); |
} |