From 3ec66893e377b088c1284d2d23adb2aeea6d7965 Mon Sep 17 00:00:00 2001 From: Aidan MacDonald Date: Sat, 27 Feb 2021 22:08:58 +0000 Subject: New port: FiiO M3K on bare metal Change-Id: I7517e7d5459e129dcfc9465c6fbd708619888fbe --- firmware/target/mips/ingenic_x1000/pwm-x1000.h | 47 ++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 firmware/target/mips/ingenic_x1000/pwm-x1000.h (limited to 'firmware/target/mips/ingenic_x1000/pwm-x1000.h') diff --git a/firmware/target/mips/ingenic_x1000/pwm-x1000.h b/firmware/target/mips/ingenic_x1000/pwm-x1000.h new file mode 100644 index 0000000000..0cea266d63 --- /dev/null +++ b/firmware/target/mips/ingenic_x1000/pwm-x1000.h @@ -0,0 +1,47 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2021 Aidan MacDonald + * + * 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_X1000_H__ +#define __PWM_X1000_H__ + +/* Usage: + * - There are 5 PWM channels (0-4) corresponding to TCUs 0-4 + * - Call pwm_init(n) before using channel n + * - Call pwm_set_period() to change the period and duty cycle at any time + * - Call pwm_enable() and pwm_disable() to turn the output on and off + * - Don't allow two threads to control the same channel at the same time + * - Don't call pwm_init(), pwm_enable(), or pwm_disable() from an interrupt + * + * After calling pwm_init(), the channel is essentially in a disabled state so + * you will need to call pwm_set_period() and then pwm_enable() to turn it on. + * Don't alter the channel's TCU or GPIO pin state after calling pwm_init(). + * + * After calling pwm_disable(), it is safe to use the channel's TCU or GPIO pin + * for some other purpose, but you must call pwm_init() before you can use the + * channel as PWM output again. + */ + +extern void pwm_init(int chn); +extern void pwm_set_period(int chn, int period_ns, int duty_ns); +extern void pwm_enable(int chn); +extern void pwm_disable(int chn); + +#endif /* __PWM_X1000_H__ */ -- cgit v1.2.3