Lib. for Atmel 1Mbits Serial EEPROM, AT24C1024B
Dependents: LPC1114_data_logger dmx_to_stepper BSM02 LPC1114_barometer_with_data_logging
AT24C1024.cpp@3:e2268ee1cb0a, 2015-06-07 (annotated)
- Committer:
- kenjiArai
- Date:
- Sun Jun 07 07:54:11 2015 +0000
- Revision:
- 3:e2268ee1cb0a
- Parent:
- 2:36339fd174d0
- Child:
- 4:1c6bba12f698
changed address data type from int to uint32_t
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kenjiArai | 0:b9f5cf0309af | 1 | /* |
kenjiArai | 2:36339fd174d0 | 2 | * mbed library program |
kenjiArai | 0:b9f5cf0309af | 3 | * Control AT24C1024 EEPROM |
kenjiArai | 0:b9f5cf0309af | 4 | * |
kenjiArai | 2:36339fd174d0 | 5 | * Copyright (c) 2014,'15 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 | 2:36339fd174d0 | 9 | * Revised: Feburary 21st, 2015 |
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 | #include "mbed.h" |
kenjiArai | 0:b9f5cf0309af | 19 | #include "AT24C1024.h" |
kenjiArai | 0:b9f5cf0309af | 20 | |
kenjiArai | 2:36339fd174d0 | 21 | AT24C1024::AT24C1024 (PinName p_sda, PinName p_scl) : _i2c(p_sda, p_scl) |
kenjiArai | 2:36339fd174d0 | 22 | { |
kenjiArai | 0:b9f5cf0309af | 23 | AT24C1024_addr = AT24C1024ADDR; |
kenjiArai | 0:b9f5cf0309af | 24 | } |
kenjiArai | 0:b9f5cf0309af | 25 | |
kenjiArai | 2:36339fd174d0 | 26 | AT24C1024::AT24C1024 (I2C& p_i2c) : _i2c(p_i2c) |
kenjiArai | 2:36339fd174d0 | 27 | { |
kenjiArai | 0:b9f5cf0309af | 28 | AT24C1024_addr = AT24C1024ADDR; |
kenjiArai | 0:b9f5cf0309af | 29 | } |
kenjiArai | 0:b9f5cf0309af | 30 | |
kenjiArai | 3:e2268ee1cb0a | 31 | uint8_t AT24C1024::read(uint32_t addr) |
kenjiArai | 2:36339fd174d0 | 32 | { |
kenjiArai | 2:36339fd174d0 | 33 | uint8_t eep_dt[2]; |
kenjiArai | 2:36339fd174d0 | 34 | uint8_t tmp_addr; |
kenjiArai | 0:b9f5cf0309af | 35 | |
kenjiArai | 0:b9f5cf0309af | 36 | tmp_addr = AT24C1024_addr; |
kenjiArai | 2:36339fd174d0 | 37 | if ( addr & 0x10000 ) { // addr > 0xffff then P0 sets 1 |
kenjiArai | 0:b9f5cf0309af | 38 | tmp_addr += 0x02; // P0=1 |
kenjiArai | 0:b9f5cf0309af | 39 | } |
kenjiArai | 0:b9f5cf0309af | 40 | eep_dt[0] = ( uint8_t )( (addr & 0xff00) >> 8 ); |
kenjiArai | 0:b9f5cf0309af | 41 | eep_dt[1] = ( uint8_t )( (addr & 0xff) ); |
kenjiArai | 3:e2268ee1cb0a | 42 | _i2c.write((uint8_t)tmp_addr, (char *)eep_dt, 2); |
kenjiArai | 3:e2268ee1cb0a | 43 | _i2c.read((uint8_t)tmp_addr, (char *)eep_dt, 1); |
kenjiArai | 0:b9f5cf0309af | 44 | return eep_dt[0]; |
kenjiArai | 0:b9f5cf0309af | 45 | } |
kenjiArai | 0:b9f5cf0309af | 46 | |
kenjiArai | 3:e2268ee1cb0a | 47 | void AT24C1024::write(uint32_t addr, uint8_t dt) |
kenjiArai | 2:36339fd174d0 | 48 | { |
kenjiArai | 2:36339fd174d0 | 49 | uint8_t eep_dt[3]; |
kenjiArai | 2:36339fd174d0 | 50 | uint8_t tmp_addr; |
kenjiArai | 0:b9f5cf0309af | 51 | |
kenjiArai | 0:b9f5cf0309af | 52 | tmp_addr = AT24C1024_addr; |
kenjiArai | 2:36339fd174d0 | 53 | if ( addr & 0x10000 ) { // addr > 0xffff then P0 sets 1 |
kenjiArai | 0:b9f5cf0309af | 54 | tmp_addr += 0x02; // P0=1 |
kenjiArai | 0:b9f5cf0309af | 55 | } |
kenjiArai | 0:b9f5cf0309af | 56 | eep_dt[0] = ( uint8_t )( (addr & 0xff00) >> 8 ); |
kenjiArai | 0:b9f5cf0309af | 57 | eep_dt[1] = ( uint8_t )( (addr & 0xff) ); |
kenjiArai | 0:b9f5cf0309af | 58 | eep_dt[2] = dt; |
kenjiArai | 3:e2268ee1cb0a | 59 | _i2c.write((uint8_t)tmp_addr, (char *)eep_dt, 3); |
kenjiArai | 0:b9f5cf0309af | 60 | } |
kenjiArai | 0:b9f5cf0309af | 61 | |
kenjiArai | 2:36339fd174d0 | 62 | AT24C_STATUS AT24C1024::read_page(uint32_t addr_page_top, uint8_t *dt, int size) |
kenjiArai | 2:36339fd174d0 | 63 | { |
kenjiArai | 2:36339fd174d0 | 64 | uint8_t eep_dt[2]; |
kenjiArai | 2:36339fd174d0 | 65 | uint8_t tmp_addr; |
kenjiArai | 0:b9f5cf0309af | 66 | |
kenjiArai | 2:36339fd174d0 | 67 | if (size >= 256 + 2) { |
kenjiArai | 2:36339fd174d0 | 68 | if ((addr_page_top & 0xff) == 0) { |
kenjiArai | 0:b9f5cf0309af | 69 | tmp_addr = AT24C1024_addr; |
kenjiArai | 2:36339fd174d0 | 70 | if ( addr_page_top & 0x10000 ) { // addr > 0xffff then P0 sets 1 |
kenjiArai | 0:b9f5cf0309af | 71 | tmp_addr += 0x02; // P0=1 |
kenjiArai | 0:b9f5cf0309af | 72 | } |
kenjiArai | 0:b9f5cf0309af | 73 | eep_dt[0] = ( uint8_t )( (addr_page_top & 0xff00) >> 8 ); |
kenjiArai | 0:b9f5cf0309af | 74 | eep_dt[1] = 0; |
kenjiArai | 3:e2268ee1cb0a | 75 | _i2c.write((uint8_t)tmp_addr, (char *)eep_dt, 2); |
kenjiArai | 3:e2268ee1cb0a | 76 | _i2c.read((uint8_t)tmp_addr, (char *)dt, 256); |
kenjiArai | 0:b9f5cf0309af | 77 | return AT24C_OK; |
kenjiArai | 0:b9f5cf0309af | 78 | } else { |
kenjiArai | 0:b9f5cf0309af | 79 | return AT24C_WRONG_TOP_ADDR; |
kenjiArai | 0:b9f5cf0309af | 80 | } |
kenjiArai | 0:b9f5cf0309af | 81 | } else { |
kenjiArai | 0:b9f5cf0309af | 82 | return AT24C_WRONG_BF_SIZE; |
kenjiArai | 0:b9f5cf0309af | 83 | } |
kenjiArai | 0:b9f5cf0309af | 84 | } |
kenjiArai | 0:b9f5cf0309af | 85 | |
kenjiArai | 2:36339fd174d0 | 86 | AT24C_STATUS AT24C1024::write_page(uint32_t addr_page_top, uint8_t *dt, int size) |
kenjiArai | 2:36339fd174d0 | 87 | { |
kenjiArai | 2:36339fd174d0 | 88 | uint8_t tmp_addr; |
kenjiArai | 2:36339fd174d0 | 89 | int i; |
kenjiArai | 0:b9f5cf0309af | 90 | |
kenjiArai | 2:36339fd174d0 | 91 | if (size >= 256 + 2) { |
kenjiArai | 2:36339fd174d0 | 92 | if ((addr_page_top & 0xff) == 0) { |
kenjiArai | 2:36339fd174d0 | 93 | for (i = 255 + 2; i > 1; i--) { // shift data |
kenjiArai | 0:b9f5cf0309af | 94 | dt[i] = dt[i-2]; |
kenjiArai | 0:b9f5cf0309af | 95 | } |
kenjiArai | 0:b9f5cf0309af | 96 | tmp_addr = AT24C1024_addr; |
kenjiArai | 2:36339fd174d0 | 97 | if ( addr_page_top & 0x10000 ) { // addr > 0xffff then P0 sets 1 |
kenjiArai | 0:b9f5cf0309af | 98 | tmp_addr += 0x02; // P0=1 |
kenjiArai | 0:b9f5cf0309af | 99 | } |
kenjiArai | 0:b9f5cf0309af | 100 | dt[0] = ( uint8_t )( (addr_page_top & 0xff00) >> 8 ); |
kenjiArai | 0:b9f5cf0309af | 101 | dt[1] = 0; |
kenjiArai | 3:e2268ee1cb0a | 102 | _i2c.write((uint8_t)tmp_addr, (char *)dt, 256 + 2); |
kenjiArai | 0:b9f5cf0309af | 103 | return AT24C_OK; |
kenjiArai | 0:b9f5cf0309af | 104 | } else { |
kenjiArai | 0:b9f5cf0309af | 105 | return AT24C_WRONG_TOP_ADDR; |
kenjiArai | 0:b9f5cf0309af | 106 | } |
kenjiArai | 0:b9f5cf0309af | 107 | } else { |
kenjiArai | 0:b9f5cf0309af | 108 | return AT24C_WRONG_BF_SIZE; |
kenjiArai | 0:b9f5cf0309af | 109 | } |
kenjiArai | 0:b9f5cf0309af | 110 | } |
kenjiArai | 0:b9f5cf0309af | 111 | |
kenjiArai | 2:36339fd174d0 | 112 | void AT24C1024::frequency(int hz) |
kenjiArai | 2:36339fd174d0 | 113 | { |
kenjiArai | 2:36339fd174d0 | 114 | _i2c.frequency(hz); |
kenjiArai | 0:b9f5cf0309af | 115 | } |