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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); |
| } |