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- /*
- Copyright 2017 Balz Guenat
- based on work by Jun Wako <wakojun@gmail.com>
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #include "ad5258.h"
- #include "i2c_master.h"
-
- ///////////////////////////////////////////////////////////////////////////////
- //
- // AD5258 I2C digital potentiometer
- // http://www.analog.com/media/en/technical-documentation/data-sheets/AD5258.pdf
- //
- #define AD5258_I2C_ADDRESS 0x30
- #define AD5258_INST_RDAC 0x00
- #define AD5258_INST_EEPROM 0x20
-
- void ad5258_init(void) {
- i2c_init();
- }
-
- uint8_t ad5258_read_rdac(void) {
- // read RDAC register
- uint8_t ret = 0;
- i2c_read_register(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &ret, 1, 100);
- return ret;
- }
-
- uint8_t ad5258_read_eeprom(void) {
- uint8_t ret = 0;
- i2c_read_register(AD5258_I2C_ADDRESS, AD5258_INST_EEPROM, &ret, 1, 100);
- return ret;
- }
-
- void ad5258_write_rdac(uint8_t rdac) {
- // write RDAC register:
- uint8_t data = rdac & 0x3F;
- i2c_write_register(AD5258_I2C_ADDRESS, AD5258_INST_RDAC, &data, 1, 100);
- }
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