forked from mirrors/qmk_firmware
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/*
|
|
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);
|
|
}
|