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| 248 | killagreg | 1 | /*#######################################################################################*/ |
| 2 | /* !!! THIS IS NOT FREE SOFTWARE !!! */ |
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| 3 | /*#######################################################################################*/ |
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| 4 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 5 | // + Copyright (c) 2008 Ingo Busker, Holger Buss |
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| 6 | // + Nur für den privaten Gebrauch / NON-COMMERCIAL USE ONLY |
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| 7 | // + FOR NON COMMERCIAL USE ONLY |
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| 8 | // + www.MikroKopter.com |
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| 9 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 10 | // + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation), |
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| 11 | // + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist. |
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| 12 | // + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt |
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| 13 | // + bzgl. der Nutzungsbedingungen aufzunehmen. |
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| 14 | // + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen, |
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| 15 | // + Verkauf von Luftbildaufnahmen, usw. |
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| 16 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 17 | // + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht, |
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| 18 | // + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen |
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| 19 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 20 | // + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts |
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| 21 | // + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de" |
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| 22 | // + eindeutig als Ursprung verlinkt werden |
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| 23 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 24 | // + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion |
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| 25 | // + Benutzung auf eigene Gefahr |
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| 26 | // + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden |
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| 27 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 28 | // + Die Portierung oder Nutzung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur |
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| 29 | // + mit unserer Zustimmung zulässig |
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| 30 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 31 | // + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen |
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| 32 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 33 | // + Redistributions of source code (with or without modifications) must retain the above copyright notice, |
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| 34 | // + this list of conditions and the following disclaimer. |
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| 35 | // + * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived |
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| 36 | // + from this software without specific prior written permission. |
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| 37 | // + * The use of this project (hardware, software, binary files, sources and documentation) is only permitted |
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| 38 | // + for non-commercial use (directly or indirectly) |
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| 39 | // + Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted |
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| 40 | // + with our written permission |
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| 41 | // + * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be |
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| 42 | // + clearly linked as origin |
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| 43 | // + * porting the sources to other systems or using the software on other systems (except hardware from www.mikrokopter.de) is not allowed |
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| 44 | // |
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| 45 | // + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 46 | // + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 47 | // + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 48 | // + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 49 | // + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 50 | // + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 51 | // + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 52 | // + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 53 | // + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 54 | // + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 55 | // + POSSIBILITY OF SUCH DAMAGE. |
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| 56 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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| 57 | #include <string.h> |
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| 58 | #include "91x_lib.h" |
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| 59 | #include "i2c.h" |
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| 60 | #include "uart1.h" |
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| 61 | #include "timer1.h" |
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| 62 | #include "eeprom.h" |
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| 63 | |||
| 64 | |||
| 65 | // The EEPROM M24C64 (64k) ist connected via I2C1 interface to the controller. |
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| 66 | // The E0, E2, E3 pins are set to low. Therefore the slave adressbits b3, b2, b1 are 0. |
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| 67 | |||
| 68 | #define EEPROM_I2C_ADDRESS 0xA0 |
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| 69 | #define EEPROM_SIZE 65536L // 64k bytes |
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| 70 | #define EEPROM_WRITE 1 |
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| 71 | #define EEPROM_READ 0 |
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| 72 | |||
| 73 | // timing |
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| 74 | #define I2C_IDLE_TIMEOUT 50 // 50 ms |
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| 75 | #define I2C_TRANSFER_TIMEOUT 50 // 50 ms |
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| 76 | #define I2C_ACCESS_RETRYS 20 // retry 20 times |
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| 77 | |||
| 78 | // globals for rx handler |
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| 79 | u8 *EEPROM_pData = 0; |
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| 80 | u16 EEPROM_DataLen = 0; |
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| 81 | |||
| 82 | // rx data handler for eeprom data read |
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| 83 | void EEPROM_RxData(u8* pRxBuffer, u8 RxBufferSize) |
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| 84 | { // if number of byte are matching |
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| 85 | if(RxBufferSize == EEPROM_DataLen) |
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| 86 | { //copy data from primary buffer to target buffer |
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| 87 | if(EEPROM_pData) memcpy(EEPROM_pData, pRxBuffer, sizeof(EEPROM_DataLen)); |
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| 88 | } |
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| 89 | } |
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| 90 | |||
| 91 | // ---------------------------------------------------------------------------------------- |
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| 92 | EEPROM_Result_t EEPROM_Transfer(u8 Direction, u16 Address, u8 *pData, u16 DataLen) |
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| 93 | { |
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| 94 | u16 i, TxBytes; |
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| 95 | u8 retry = 0; |
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| 96 | EEPROM_Result_t retval = EEPROM_ERROR_UNKNOWN; |
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| 97 | |||
| 98 | if(((u32)Address + (u32)DataLen) >= (EEPROM_SIZE - 1)) |
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| 99 | { |
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| 100 | retval = EEPROM_ERROR_OUT_OF_ADDRESS_RANGE; |
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| 101 | return(retval); |
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| 102 | } |
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| 103 | if((DataLen+2) > I2C_BUFFER_LEN) |
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| 104 | { |
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| 105 | retval = EEPROM_I2C_BUFFER_OVERRUN; |
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| 106 | return(retval); |
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| 107 | } |
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| 108 | do |
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| 109 | { |
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| 110 | if(!I2C_LockBuffer(I2C_IDLE_TIMEOUT)) return EEPROM_ERROR_I2C_TRANSFER_TIMEOUT; |
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| 111 | // buffer is now locked |
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| 112 | TxBytes = 0; |
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| 113 | // transmitt address |
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| 114 | I2C_Buffer[TxBytes++] = (u8)(0x00FF & (Address>>8)); |
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| 115 | I2C_Buffer[TxBytes++] = (u8)(0x00FF & Address); |
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| 116 | if(Direction == EEPROM_WRITE) |
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| 117 | { // copy data to i2c transfer buffer |
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| 118 | for(i = 0; i<DataLen;i++) |
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| 119 | { |
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| 120 | I2C_Buffer[TxBytes++] = pData[i]; |
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| 121 | } |
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| 122 | // prepare pointer to rx data |
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| 123 | EEPROM_pData = 0; |
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| 124 | EEPROM_DataLen = 0; |
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| 125 | // start transmission |
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| 126 | if(!I2C_Transmission(EEPROM_I2C_ADDRESS, TxBytes, 0, 0)) |
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| 127 | { |
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| 128 | return(retval); |
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| 129 | } |
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| 130 | } |
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| 131 | else // Direction == EEPROM_READ |
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| 132 | { |
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| 133 | // prepare pointer to rx data |
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| 134 | EEPROM_pData = pData; |
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| 135 | EEPROM_DataLen = DataLen; |
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| 136 | // start transmission |
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| 137 | if(!I2C_Transmission(EEPROM_I2C_ADDRESS, TxBytes, &EEPROM_RxData, DataLen)) |
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| 138 | { |
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| 139 | return(retval); |
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| 140 | } |
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| 141 | } |
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| 142 | //wait for end of this transfer |
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| 143 | if(I2C_WaitForEndOfTransmission(I2C_TRANSFER_TIMEOUT)) |
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| 144 | { |
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| 145 | retval = EEPROM_SUCCESS; |
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| 146 | break; |
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| 147 | } |
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| 148 | // or retry |
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| 149 | I2C_State = I2C_STATE_IDLE; |
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| 150 | } while(++retry < I2C_ACCESS_RETRYS); |
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| 151 | return(retval); |
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| 152 | } |
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| 153 | |||
| 154 | EEPROM_Result_t EEPROM_WriteBlock(u16 Address, u8 *pData, u16 DataLen) |
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| 155 | { |
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| 156 | u16 len; |
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| 157 | EEPROM_Result_t retval; |
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| 158 | |||
| 159 | // there can be 32 bytes written in a single cycle if the adresses are locates in the same row |
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| 160 | // i.e. the upper 11 bits of the addres are constant |
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| 161 | #define EEPROM_WRITE_BLOCK_SIZE 32 |
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| 162 | |||
| 163 | len = EEPROM_WRITE_BLOCK_SIZE - Address%EEPROM_WRITE_BLOCK_SIZE; // number of bytes to match the next row |
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| 164 | if(len >= DataLen) len = DataLen; // do not write more than neccesarry |
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| 165 | |||
| 166 | do |
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| 167 | { |
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| 168 | retval = EEPROM_Transfer(I2C_MODE_TRANSMITTER, Address, pData, len); |
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| 169 | Address += len; // Address of the next row |
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| 170 | pData += len; // pointer to start of next data block |
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| 171 | DataLen -= len; // reduce the number of to be transmitted |
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| 172 | if(DataLen > EEPROM_WRITE_BLOCK_SIZE) len = EEPROM_WRITE_BLOCK_SIZE; // limit next block size to 32 |
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| 173 | else len = DataLen; |
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| 174 | } |
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| 175 | while(DataLen && (retval == EEPROM_SUCCESS)); // repeat until all data have been sent and no error has occured |
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| 176 | |||
| 177 | return(retval); |
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| 178 | } |
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| 179 | |||
| 180 | // a data block can be subsequently read after setting the start address once |
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| 181 | EEPROM_Result_t EEPROM_ReadBlock(u16 Address, u8 *pData, u16 DataLen) |
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| 182 | { |
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| 183 | return EEPROM_Transfer(I2C_MODE_RECEIVER, Address, pData, DataLen); |
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| 184 | } |