/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2011 by Amaury Pouly * * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #ifndef __PWM_IMX233_H__ #define __PWM_IMX233_H__ #include "system.h" #include "regs/regs-pwm.h" /* fake field for simpler programming */ #define BP_PWM_CTRL_PWMx_ENABLE(x) (x) #define BM_PWM_CTRL_PWMx_ENABLE(x) (1 << (x)) #define IMX233_PWM_MAX_PERIOD (1 << 16) #define IMX233_PWM_NR_CHANNELS 5 void imx233_pwm_init(void); void imx233_pwm_setup(int channel, int period, int cdiv, int active, int active_state, int inactive, int inactive_state); /* helper function to compute adequate divisor and period, given a minimum * period resolution (for active/inactive) */ void imx233_pwm_lookup_freq(int freq, int min_period, int *period, int *cdiv); /* simple setup with active 1, inactive 0, duty cycle in percent */ void imx233_pwm_setup_simple(int channel, int freq, int duty_cycle); void imx233_pwm_enable(int channel, bool enable); bool imx233_pwm_is_enabled(int channel); struct imx233_pwm_info_t { bool enabled; int cdiv; int period; int inactive, active; char inactive_state, active_state; // '0', '1' or 'Z' }; struct imx233_pwm_info_t imx233_pwm_get_info(int channel); #endif /* __PWM_IMX233_H__ */