From b4a96cca3985cba6079d1b7a16f30aa43432a9b3 Mon Sep 17 00:00:00 2001 From: Nicolas Schodet Date: Fri, 6 May 2011 01:55:49 +0200 Subject: digital/io-hub: add PWM --- digital/io-hub/src/common/pwm.h | 60 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 digital/io-hub/src/common/pwm.h (limited to 'digital/io-hub/src/common/pwm.h') diff --git a/digital/io-hub/src/common/pwm.h b/digital/io-hub/src/common/pwm.h new file mode 100644 index 00000000..aff84b39 --- /dev/null +++ b/digital/io-hub/src/common/pwm.h @@ -0,0 +1,60 @@ +#ifndef pwm_h +#define pwm_h +/* pwm.h */ +/* io-hub - Modular Input/Output. {{{ + * + * Copyright (C) 2011 Nicolas Schodet + * + * APBTeam: + * Web: http://apbteam.org/ + * Email: team AT apbteam DOT org + * + * 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * }}} */ + +/** Handle PWM output with direction. Also handle timed PWM setting to apply + * a PWM value for a given number of update, then switch to a resting value. + * + * AC_IOHUB_PWM should be set to a list of space separated PWM macro call: + * + * PWM (timer, pwm, pwm_io_port, pwm_io_n, dir_io_port, dir_io_n) + * + * For example: + * + * PWM (1, A, B, 1, B, 2) => use output compare A on timer 1, PWM output on + * B1, direction on B2. */ + +/** Maximum positive value. */ +#define PWM_MAX 0x3ff + +/** Initialise PWM module. */ +void +pwm_init (void); + +/** Update PWM module (handle timed PWM). */ +void +pwm_update (void); + +/** Set PWM value for given PWM index. */ +void +pwm_set (uint8_t index, int16_t value); + +/** Set PWM value for given PWM index for a given time. After time elapsed, + * use a rest value. */ +void +pwm_set_timed (uint8_t index, int16_t value, uint16_t time, int16_t value_rest); + +#endif /* pwm_h */ -- cgit v1.2.3