From b814bc2ab370832431d3fa659521949482aa2180 Mon Sep 17 00:00:00 2001 From: Jérémy Dufour Date: Mon, 21 Apr 2008 23:56:02 +0200 Subject: * digital/io/src - move functions definitions of switch module to a source file ; - add a filter when getting the state value of the jack ; - add jack events transmission to the top FSM into the main loop ; - make it build for host implementation. --- digital/io/src/switch.avr.c | 143 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 digital/io/src/switch.avr.c (limited to 'digital/io/src/switch.avr.c') diff --git a/digital/io/src/switch.avr.c b/digital/io/src/switch.avr.c new file mode 100644 index 00000000..dcc35765 --- /dev/null +++ b/digital/io/src/switch.avr.c @@ -0,0 +1,143 @@ +/* switch.c */ +/* io - Input & Output with Artificial Intelligence (ai) support on AVR. {{{ + * + * Copyright (C) 2008 Dufour Jérémy + * + * 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. + * + * }}} */ + +#include "switch.h" + +#include "common.h" +#include "modules/utils/utils.h" /* set_bit */ +#include "io.h" /* PORT/PIN, bit_is_set */ + +/** + * @defgroup SwitchConfiguration Configuration of the switch module. + * You can change the value of the defines and variables of this group to + * configure the module. + */ + +/** + * Color selector switch port. + */ +#define SWITCH_COLOR_PORT PORTC + +/** + * Color selector read register port. + */ +#define SWITCH_COLOR_PIN PINC + +/** + * Color selector switch pin number of the port. + */ +#define SWITCH_COLOR_PIN_NUMBER 0 + +/** + * Jack switch port. + */ +#define SWITCH_JACK_PORT PORTC + +/** + * Jack switch read register port. + */ +#define SWITCH_JACK_PIN PINC + +/** + * Jack switch pin number of the port. + */ +#define SWITCH_JACK_PIN_NUMBER 1 + +/** + * Number of iteration of 4.4 ms to have for the filter. + */ +#define SWITCH_JACK_FILTER_NUMBER 50 + +/** + * Get the current state of the jack switch. + * @return the state of the jack without any filter. + */ +static inline uint8_t +switch_get_jack_raw (void); + +/** + * The current filtered value of the jack. + */ +uint8_t switch_jack_filtered_value_; + +/** @} */ + +/* Initialize the switch module. */ +void +switch_init (void) +{ + /* By default, all pins are in input direction */ + /* Enable the pull-ups */ + set_bit (SWITCH_COLOR_PORT, SWITCH_COLOR_PIN_NUMBER); + set_bit (SWITCH_JACK_PORT, SWITCH_JACK_PIN_NUMBER); + /* By default, there is no jack inserted */ + switch_jack_filtered_value_ = 1; +} + +/* Update the switch module. */ +void +switch_update (void) +{ + /* Filter counter */ + static uint8_t switch_jack_filter = 0; + + /* If the get return the same as the cached one */ + if (switch_get_jack_raw () == switch_jack_filtered_value_) + /* Ensure filter counter is zero */ + switch_jack_filter = 0; + else + { + /* Increment filter counter and compare it to the max filter */ + if (switch_jack_filter++ == SWITCH_JACK_FILTER_NUMBER) + { + /* We change the value of the jack */ + switch_jack_filtered_value_ = !switch_jack_filtered_value_; + /* Reset filter counter */ + switch_jack_filter = 0; + } + } +} + +/* Get the current state of the select colors switch. */ +enum team_color_e +switch_get_color (void) +{ + return bit_is_set (SWITCH_COLOR_PIN, SWITCH_COLOR_PIN_NUMBER); +} + +/* Get the current state of the jack switch. */ +static inline uint8_t +switch_get_jack_raw (void) +{ + return bit_is_set (SWITCH_JACK_PIN, SWITCH_JACK_PIN_NUMBER); +} + +/* Get the value of the jack with filtering. */ +uint8_t +switch_get_jack (void) +{ + return switch_jack_filtered_value_; +} + -- cgit v1.2.3