Lib. for Atmel 1Mbits Serial EEPROM, AT24C1024B
Dependents: LPC1114_data_logger dmx_to_stepper BSM02 LPC1114_barometer_with_data_logging
AT24C1024.h@1:05012e75c050, 2014-06-29 (annotated)
- Committer:
- kenjiArai
- Date:
- Sun Jun 29 06:52:37 2014 +0000
- Revision:
- 1:05012e75c050
- Parent:
- 0:b9f5cf0309af
- Child:
- 2:36339fd174d0
small modofocation
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kenjiArai | 0:b9f5cf0309af | 1 | /* |
kenjiArai | 0:b9f5cf0309af | 2 | * mbed library program |
kenjiArai | 0:b9f5cf0309af | 3 | * Control AT24C1024 EEPROM |
kenjiArai | 0:b9f5cf0309af | 4 | * |
kenjiArai | 0:b9f5cf0309af | 5 | * Copyright (c) 2014 Kenji Arai / JH1PJL |
kenjiArai | 0:b9f5cf0309af | 6 | * http://www.page.sannet.ne.jp/kenjia/index.html |
kenjiArai | 0:b9f5cf0309af | 7 | * http://mbed.org/users/kenjiArai/ |
kenjiArai | 0:b9f5cf0309af | 8 | * Created: June 17th, 2014 |
kenjiArai | 1:05012e75c050 | 9 | * Revised: June 25th, 2014 |
kenjiArai | 0:b9f5cf0309af | 10 | * |
kenjiArai | 0:b9f5cf0309af | 11 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
kenjiArai | 0:b9f5cf0309af | 12 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE |
kenjiArai | 0:b9f5cf0309af | 13 | * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
kenjiArai | 0:b9f5cf0309af | 14 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
kenjiArai | 0:b9f5cf0309af | 15 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
kenjiArai | 0:b9f5cf0309af | 16 | */ |
kenjiArai | 0:b9f5cf0309af | 17 | |
kenjiArai | 0:b9f5cf0309af | 18 | #ifndef AT24C1024_H |
kenjiArai | 0:b9f5cf0309af | 19 | #define AT24C1024_H |
kenjiArai | 0:b9f5cf0309af | 20 | |
kenjiArai | 0:b9f5cf0309af | 21 | #include "mbed.h" |
kenjiArai | 0:b9f5cf0309af | 22 | |
kenjiArai | 0:b9f5cf0309af | 23 | /** Interface for 1Mbit Serial EEPROM (I2C Interface) Atmel Corp. AT24C1024B |
kenjiArai | 0:b9f5cf0309af | 24 | * |
kenjiArai | 0:b9f5cf0309af | 25 | * @code |
kenjiArai | 0:b9f5cf0309af | 26 | * #include "mbed.h" |
kenjiArai | 0:b9f5cf0309af | 27 | * |
kenjiArai | 0:b9f5cf0309af | 28 | * // I2C Communication |
kenjiArai | 0:b9f5cf0309af | 29 | * AT24C1024 at24c1024(dp5,dp27);// SDA, SCL |
kenjiArai | 0:b9f5cf0309af | 30 | * // If you connected I2C line not only this device but also other devices, |
kenjiArai | 0:b9f5cf0309af | 31 | * // you need to declare following method. |
kenjiArai | 0:b9f5cf0309af | 32 | * I2C i2c(dp5,dp27); // SDA, SCL |
kenjiArai | 0:b9f5cf0309af | 33 | * AT24C1024 at24c1024(i2c); // Atmel 1Mbit EE-PROM |
kenjiArai | 0:b9f5cf0309af | 34 | * |
kenjiArai | 0:b9f5cf0309af | 35 | * int main() { |
kenjiArai | 0:b9f5cf0309af | 36 | * at24c1024.write(0,dt); // write addr=0 data=dt |
kenjiArai | 0:b9f5cf0309af | 37 | * dt = at24c1024.read(0); // read addr=0 |
kenjiArai | 0:b9f5cf0309af | 38 | * // page write mode, addr top=0x1ff00, 256bytes data (save it in eep_buf[]) |
kenjiArai | 0:b9f5cf0309af | 39 | * status = at24c1024.write_page(0x1ff00, eep_buf, sizeof(eep_buf)); |
kenjiArai | 0:b9f5cf0309af | 40 | * } |
kenjiArai | 0:b9f5cf0309af | 41 | * @endcode |
kenjiArai | 0:b9f5cf0309af | 42 | */ |
kenjiArai | 0:b9f5cf0309af | 43 | |
kenjiArai | 0:b9f5cf0309af | 44 | // EEPROM Atmel AT24C1024 |
kenjiArai | 0:b9f5cf0309af | 45 | // Address b7=1,b6=0,b5=1,b4=0,b3=A2pin,b2=A1pin,b1=page addr, b0=R/W |
kenjiArai | 0:b9f5cf0309af | 46 | #define AT24C1024ADDR 0xa0 // as initial data (A2=A1=GND) |
kenjiArai | 0:b9f5cf0309af | 47 | |
kenjiArai | 0:b9f5cf0309af | 48 | typedef enum { |
kenjiArai | 0:b9f5cf0309af | 49 | AT24C_OK = 0, |
kenjiArai | 0:b9f5cf0309af | 50 | AT24C_BUSY, |
kenjiArai | 0:b9f5cf0309af | 51 | AT24C_WRONG_BF_SIZE, |
kenjiArai | 0:b9f5cf0309af | 52 | AT24C_WRONG_TOP_ADDR, |
kenjiArai | 0:b9f5cf0309af | 53 | AT24C_ERROR |
kenjiArai | 0:b9f5cf0309af | 54 | } AT24C_STATUS; |
kenjiArai | 0:b9f5cf0309af | 55 | |
kenjiArai | 0:b9f5cf0309af | 56 | class AT24C1024 |
kenjiArai | 0:b9f5cf0309af | 57 | { |
kenjiArai | 0:b9f5cf0309af | 58 | public: |
kenjiArai | 0:b9f5cf0309af | 59 | /** Configure data pin |
kenjiArai | 0:b9f5cf0309af | 60 | * @param data SDA and SCL pins |
kenjiArai | 0:b9f5cf0309af | 61 | */ |
kenjiArai | 0:b9f5cf0309af | 62 | AT24C1024(PinName p_sda, PinName p_scl); |
kenjiArai | 0:b9f5cf0309af | 63 | |
kenjiArai | 0:b9f5cf0309af | 64 | /** Configure data pin (with other devices on I2C line) |
kenjiArai | 0:b9f5cf0309af | 65 | * @param I2C previous definition |
kenjiArai | 0:b9f5cf0309af | 66 | */ |
kenjiArai | 0:b9f5cf0309af | 67 | AT24C1024(I2C& p_i2c); |
kenjiArai | 0:b9f5cf0309af | 68 | |
kenjiArai | 0:b9f5cf0309af | 69 | /** Read one data from EEPROM |
kenjiArai | 0:b9f5cf0309af | 70 | * @param dat_address (0 to 0x1ffff) |
kenjiArai | 0:b9f5cf0309af | 71 | * @return read data |
kenjiArai | 0:b9f5cf0309af | 72 | */ |
kenjiArai | 0:b9f5cf0309af | 73 | uint8_t read(int addr); |
kenjiArai | 0:b9f5cf0309af | 74 | |
kenjiArai | 0:b9f5cf0309af | 75 | /** Write one data to EEPROM |
kenjiArai | 0:b9f5cf0309af | 76 | * @param data_address (o to 0x1ffff), data (byte) |
kenjiArai | 0:b9f5cf0309af | 77 | * @return none |
kenjiArai | 0:b9f5cf0309af | 78 | */ |
kenjiArai | 0:b9f5cf0309af | 79 | void write(int addr, uint8_t dt); |
kenjiArai | 0:b9f5cf0309af | 80 | |
kenjiArai | 0:b9f5cf0309af | 81 | /** Page read (256 bytes) from EEPROM |
kenjiArai | 0:b9f5cf0309af | 82 | * @param top_address (o to 0x1ffxx) e.g. 0x00,0x100,0x200 --- 0x1fe00, 0x1ff00 |
kenjiArai | 0:b9f5cf0309af | 83 | * @param dt -> buffer (at least need to keep 258 bytes), data top = buffer[0] |
kenjiArai | 0:b9f5cf0309af | 84 | * @param size -> sizeof(buffer) |
kenjiArai | 0:b9f5cf0309af | 85 | * @return status 0=OK, others=Error |
kenjiArai | 0:b9f5cf0309af | 86 | */ |
kenjiArai | 0:b9f5cf0309af | 87 | AT24C_STATUS read_page(uint32_t addr_page_top, uint8_t *dt, int size); |
kenjiArai | 0:b9f5cf0309af | 88 | |
kenjiArai | 0:b9f5cf0309af | 89 | /** Page write (256 bytes) to EEPROM |
kenjiArai | 0:b9f5cf0309af | 90 | * @param top_address (o to 0x1ffxx) e.g. 0x00,0x100,0x200 --- 0x1fe00, 0x1ff00 |
kenjiArai | 0:b9f5cf0309af | 91 | * @param dt -> buffer (at least need to keep 258 bytes), data top = buffer[0] |
kenjiArai | 0:b9f5cf0309af | 92 | * @param size -> sizeof(buffer) |
kenjiArai | 0:b9f5cf0309af | 93 | * @return status 0=OK, others=Error |
kenjiArai | 0:b9f5cf0309af | 94 | */ |
kenjiArai | 0:b9f5cf0309af | 95 | AT24C_STATUS write_page(uint32_t addr_page_top, uint8_t *dt, int size); |
kenjiArai | 0:b9f5cf0309af | 96 | |
kenjiArai | 0:b9f5cf0309af | 97 | protected: |
kenjiArai | 0:b9f5cf0309af | 98 | void i2c_read_n_bytes(int, char*, int); |
kenjiArai | 0:b9f5cf0309af | 99 | void i2c_write_n_bytes(int, char*, int); |
kenjiArai | 0:b9f5cf0309af | 100 | |
kenjiArai | 0:b9f5cf0309af | 101 | I2C i2c; |
kenjiArai | 0:b9f5cf0309af | 102 | |
kenjiArai | 0:b9f5cf0309af | 103 | private: |
kenjiArai | 0:b9f5cf0309af | 104 | uint8_t AT24C1024_addr; |
kenjiArai | 0:b9f5cf0309af | 105 | }; |
kenjiArai | 0:b9f5cf0309af | 106 | |
kenjiArai | 1:05012e75c050 | 107 | #endif // AT24C1024_H |