vcom.h

00001 /*
00002   Plastic Logic EPD project on MSP430
00003 
00004   Copyright (C) 2013 Plastic Logic Limited
00005 
00006   This program is free software: you can redistribute it and/or modify
00007   it under the terms of the GNU General Public License as published by
00008   the Free Software Foundation, either version 3 of the License, or
00009   (at your option) any later version.
00010 
00011   This program is distributed in the hope that it will be useful,
00012   but WITHOUT ANY WARRANTY; without even the implied warranty of
00013   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014   GNU General Public License for more details.
00015 
00016   You should have received a copy of the GNU General Public License
00017   along with this program.  If not, see <http://www.gnu.org/licenses/>.
00018 */
00019 /*
00020  * vcom.h -- VCOM Calculation support
00021  *
00022  * Authors: Nick Terry <nick.terry@plasticlogic.com>
00023  *
00024  */
00025 
00026 #ifndef VCOM_H_
00027 #define VCOM_H_
00028 
00029 #include <pl/hwinfo.h>
00030 #include <stdint.h>
00031 
00032 struct vcom_cal {
00033     int32_t swing;
00034     int32_t swing_ideal;
00035     int32_t dac_offset;
00036     int32_t dac_dx;
00037     int32_t dac_dy;
00038     int32_t dac_step_mv;
00039 };
00040 
00041 /** Initialise a vcom_cal structure */
00042 extern void vcom_init(struct vcom_cal *v, const struct pl_hw_vcom_info *c);
00043 
00044 /** Get the DAC register value for a given VCOM input voltage */
00045 extern int vcom_calculate(const struct vcom_cal *v, int input_mv);
00046 
00047 #endif /* VCOM_H_ */