624 lines
14 KiB
C
624 lines
14 KiB
C
// -*- mode: C; tab-width: 2 ; indent-tabs-mode: nil -*-
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//
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// Unfified Keyboard Project
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// ASDF keyboard firmware
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//
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// asdf_arch.c
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//
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// This file contains all the architecture dependent code, including register
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// setup, I/O, timers, etc.
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//
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// Copyright 2019 David Fenyes
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//
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// This program is free software: you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free Software
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// Foundation, either version 3 of the License, or (at your option) any later
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// version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along with
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// this program. If not, see <https://www.gnu.org/licenses/>.
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// Wiring Information:
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// Chip: {Microcontroller type and version}
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//
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// Example:
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// PIN NAME FUNCTION
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// 14-19,9,10 PORTB COLUMN inputs (1 bit per column)
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// 23-25 PORTC0-2 ROW outputs (row number)
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// 27 PORTC4
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#include <stdio.h>
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#include <stdint.h>
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#include "asdf_config.h"
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#include "asdf_physical.h"
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#include "asdf_arch.h"
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typedef enum {
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PULSE_EVENT_SET_HIGH,
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PULSE_EVENT_SET_LOW,
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PULSE_EVENT_DELAY,
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NUM_PULSE_EVENTS
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} pulse_event_t;
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static pulse_state_t pulse_transition_table[PD_ST_NUM_VALID_PULSE_STATES][NUM_PULSE_EVENTS] =
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{
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[PD_ST_INITIAL_STATE] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_STABLE_HIGH,
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[PULSE_EVENT_SET_LOW] = PD_ST_STABLE_LOW,
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[PULSE_EVENT_DELAY] = PD_ST_ERROR_PULSE_FROM_INITIAL_STATE,
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},
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[PD_ST_STABLE_LOW] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_TRANSITION_HIGH,
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[PULSE_EVENT_SET_LOW] = PD_ST_STABLE_LOW,
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[PULSE_EVENT_DELAY] = PD_ST_ERROR_NO_TRANSITION_BEFORE_DELAY,
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},
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[PD_ST_STABLE_HIGH] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_STABLE_HIGH,
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[PULSE_EVENT_SET_LOW] = PD_ST_TRANSITION_LOW,
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[PULSE_EVENT_DELAY] = PD_ST_ERROR_NO_TRANSITION_BEFORE_DELAY,
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},
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[PD_ST_TRANSITION_LOW] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_TRANSITION_HIGH,
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[PULSE_EVENT_SET_LOW] = PD_ST_STABLE_LOW,
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[PULSE_EVENT_DELAY] = PD_ST_PULSE_DELAY_LOW,
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},
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[PD_ST_TRANSITION_HIGH] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_STABLE_HIGH,
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[PULSE_EVENT_SET_LOW] = PD_ST_TRANSITION_LOW,
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[PULSE_EVENT_DELAY] = PD_ST_PULSE_DELAY_HIGH,
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},
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[PD_ST_PULSE_DELAY_LOW] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_PULSE_LOW_DETECTED,
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[PULSE_EVENT_SET_LOW] = PD_ST_ERROR_NO_TRANSITION_AFTER_DELAY,
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[PULSE_EVENT_DELAY] = PD_ST_ERROR_DOUBLE_DELAY,
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},
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[PD_ST_PULSE_DELAY_HIGH] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_ERROR_NO_TRANSITION_AFTER_DELAY,
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[PULSE_EVENT_SET_LOW] = PD_ST_PULSE_HIGH_DETECTED,
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[PULSE_EVENT_DELAY] = PD_ST_ERROR_DOUBLE_DELAY,
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},
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[PD_ST_PULSE_HIGH_DETECTED] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_TRANSITION_HIGH,
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[PULSE_EVENT_SET_LOW] = PD_ST_STABLE_LOW,
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[PULSE_EVENT_DELAY] = PD_ST_ERROR_NO_TRANSITION_BEFORE_DELAY
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},
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[PD_ST_PULSE_LOW_DETECTED] =
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{
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[PULSE_EVENT_SET_HIGH] = PD_ST_STABLE_HIGH,
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[PULSE_EVENT_SET_LOW] = PD_ST_TRANSITION_LOW,
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[PULSE_EVENT_DELAY] = PD_ST_ERROR_NO_TRANSITION_BEFORE_DELAY
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},
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};
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static uint8_t outputs[ASDF_PHYSICAL_NUM_RESOURCES];
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static pulse_state_t pulses[ASDF_PHYSICAL_NUM_RESOURCES];
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static asdf_keycode_t code_register;
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static uint8_t code_sent;
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// PROCEDURE: asdf_arch_send_code
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// INPUTS: asdf_keycode_t code
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// OUTPUTS: none
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// DESCRIPTION: emulates sending a code, by copying code to a register that can
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// be tested.
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//
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// SIDE_EFFECTS: sets code_sent variable and alters code_register
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_send_code(asdf_keycode_t code)
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{
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code_register = code;
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code_sent = 1;
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}
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// PROCEDURE: asdf_arch_get_sent_code
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// INPUTS: none
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// OUTPUTS: returns type (asdf_keycode_t) in register and zeros the register.
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// DESCRIPTION: faciliates test of sending a code, by reporting contents of the
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// "sent register". Resets code_sent variable.
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//
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// SIDE_EFFECTS: alters code_sent variable
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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asdf_keycode_t asdf_arch_get_sent_code(void)
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{
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code_sent = 0;
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return code_register;
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}
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// PROCEDURE: asdf_arch_was_code_sent
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// INPUTS: none
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// OUTPUTS: returns TRUE if a code was sent, FALSE otherwise.
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// DESCRIPTION: returns status of code_sent variable.
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//
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// SIDE_EFFECTS: sets code_sent variable and alters code_register
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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uint8_t asdf_arch_was_code_sent(void){
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return code_sent;
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}
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// PROCEDURE: pulse_detect
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// INPUTS: (pulse_state_t) current_state
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// (pulse_event_t) event - current input to the state machine
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// OUTPUTS: returns new pulse detector state for the output.
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//
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// DESCRIPTION: Given an output and a new value for the output, calculate the
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// next state of the pulse detector for the output.
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//
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// SIDE EFFECTS: none.
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//
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// NOTES:
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//
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// SCOPE: private
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//
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// COMPLEXITY: 2
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//
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static pulse_state_t pulse_detect(pulse_state_t current_state, pulse_event_t event)
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{
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pulse_state_t next_state = current_state;
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// advance state if current state is valid (not an error state)
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if (current_state < PD_ST_NUM_VALID_PULSE_STATES) {
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next_state = pulse_transition_table[current_state][event];
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}
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return next_state;
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}
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// PROCEDURE: set_output
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// INPUTS: (asdf_physical_dev_t) output_dev - the output to set
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// (uint8_t) value - value to assert on the output
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// OUTPUTS: none
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//
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// DESCRIPTION: Given an output and a new value for the output, set the output
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// and advance the pulse detector state for the output.
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//
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// SIDE EFFECTS: see above.
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//
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// NOTES:
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//
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// SCOPE: private
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//
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// COMPLEXITY: 1
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//
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static void set_output(asdf_physical_dev_t output_dev, uint8_t value)
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{
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pulse_event_t pulse_event = value ? PULSE_EVENT_SET_HIGH : PULSE_EVENT_SET_LOW;
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outputs[output_dev] = value;
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pulses[output_dev] = pulse_detect(pulses[output_dev], pulse_event);
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}
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// PROCEDURE: asdf_arch_null_output
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// INPUTS: (uint8_t) value - ignored
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// OUTPUTS: none
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//
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// DESCRIPTION: Does nothing.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 2
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//
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void asdf_arch_null_output(uint8_t value)
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{
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set_output(PHYSICAL_NO_OUT, value);
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}
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// PROCEDURE: asdf_arch_led1_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: If value is true, turn on LED1. If value is false, turn off LED1
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//
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// SIDE EFFECTS: See above.
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_led1_set(uint8_t value)
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{
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set_output(PHYSICAL_LED1, value);
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}
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// PROCEDURE: asdf_arch_led2_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: If value is true, turn on LED2. If value is false, turn off LED2
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//
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// SIDE EFFECTS: See above.
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_led2_set(uint8_t value)
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{
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set_output(PHYSICAL_LED2, value);
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}
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// PROCEDURE: asdf_arch_led3_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: If value is true, turn on LED3. If value is false, turn off LED3
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//
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// SIDE EFFECTS: See above.
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_led3_set(uint8_t value)
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{
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set_output(PHYSICAL_LED3, value);
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}
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// PROCEDURE: asdf_arch_out1_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Sets the OUT1 bit if value is true, and clear OUT1 if value is false.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_out1_set(uint8_t value)
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{
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set_output(PHYSICAL_OUT1, value);
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}
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// PROCEDURE: asdf_arch_out1_open_hi_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates setting the OUT1 bit to hi-z if value is true, and low
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// if value is false. For testing, set PHYSICAL_OUT1_OPEN_HI to the value.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_out1_open_hi_set(uint8_t value)
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{set_output(PHYSICAL_OUT1_OPEN_HI, value);
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}
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// PROCEDURE: asdf_arch_out1_open_lo_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates setting the OUT1 bit to high if value is true, and hi-z
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// if value is false. For testing, set PHYSICAL_OUT1_OPEN_LO to the value.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_out1_open_lo_set(uint8_t value)
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{set_output(PHYSICAL_OUT1_OPEN_HI, value);
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}
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// PROCEDURE: asdf_arch_out2_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Sets the OUT2 bit if value is true, and clear OUT2 if value is false.
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//
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// SIDE EFFECTS: See above.
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//
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// SCOPE: public
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//
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// COMPLEXITY: 2
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//
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void asdf_arch_out2_set(uint8_t value)
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{
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set_output(PHYSICAL_OUT2, value);
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}
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// PROCEDURE: asdf_arch_out2_open_hi_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates setting the OUT2 bit to hi-z if value is true, and low
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// if value is false. For testing, set PHYSICAL_OUT2_OPEN_HI to the value.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_out2_open_hi_set(uint8_t value)
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{set_output(PHYSICAL_OUT1_OPEN_HI, value);
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}
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// PROCEDURE: asdf_arch_out2_open_lo_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates setting the OUT2 bit to high if value is true, and hi-z
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// if value is false. For testing, set PHYSICAL_OUT2_OPEN_LO to the value.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_out2_open_lo_set(uint8_t value)
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{set_output(PHYSICAL_OUT1_OPEN_HI, value);
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}
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// PROCEDURE: asdf_arch_out3_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Sets the OUT3 bit if value is true, and clear OUT3 if value is false.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_out3_set(uint8_t value)
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{
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set_output(PHYSICAL_OUT3, value);
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}
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// PROCEDURE: asdf_arch_out3_open_hi_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates setting the OUT3 bit to hi-z if value is true, and low
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// if value is false. For testing, set PHYSICAL_OUT3_OPEN_HI to the value.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_out3_open_hi_set(uint8_t value)
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{set_output(PHYSICAL_OUT1_OPEN_HI, value);
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}
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// PROCEDURE: asdf_arch_out3_open_lo_set
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// INPUTS: (uint8_t) value
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates setting the OUT3 bit to high if value is true, and hi-z
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// if value is false. For testing, set PHYSICAL_OUT3_OPEN_LO to the value.
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//
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// SIDE EFFECTS: See above.
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_out3_open_lo_set(uint8_t value)
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{set_output(PHYSICAL_OUT1_OPEN_HI, value);
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}
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// PROCEDURE: asdf_arch_check_output
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// INPUTS:(asdf_physical_dev_t) device - which device to check
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// OUTPUTS: the value of the device setting.
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//
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// DESCRIPTION: For a given physical device, return the current setting (true or false)
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//
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// SIDE EFFECTS: none
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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uint8_t asdf_arch_check_output(asdf_physical_dev_t device)
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{
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return outputs[device];
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}
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// PROCEDURE: asdf_arch_check_pulse
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// INPUTS:(asdf_physical_dev_t) device - which device to check
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// OUTPUTS: the value of the device pulse detector
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//
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// DESCRIPTION: For a given physical device, return the state of the pulse detector
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//
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// SIDE EFFECTS: none
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//
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// NOTES:
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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uint8_t asdf_arch_check_pulse(asdf_physical_dev_t device)
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{
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return pulses[device];
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}
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// PROCEDURE: asdf_arch_pulse_delay
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// INPUTS: none
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates a delay by advancing the pulse detector state machine
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// for each output.
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//
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// SIDE EFFECTS: see above.
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//
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// NOTES: Set ASDF_PULSE_DELAY_US in asdf_config.h
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//
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// SCOPE: private
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//
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// COMPLEXITY: 2
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//
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void asdf_arch_pulse_delay(void)
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{
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for (uint8_t i = 0; i < ASDF_PHYSICAL_NUM_RESOURCES; i++) {
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pulses[i] = pulse_detect(pulses[i], PULSE_EVENT_DELAY);
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}
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}
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// PROCEDURE: asdf_arch_pulse_delay_long
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// INPUTS: none
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates a long delay by advancing the pulse detector state machine
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// for each output.
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//
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// SIDE EFFECTS: see above.
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//
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// NOTES: Set ASDF_PULSE_DELAY_US in asdf_config.h
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_pulse_delay_long(void)
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{
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asdf_arch_pulse_delay();
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}
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// PROCEDURE: asdf_arch_delay_ms
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// INPUTS: (uint16) delay_ms - the delay in msec.
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// OUTPUTS: none
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//
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// DESCRIPTION: Delays a specified number of milliseconds
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//
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// SIDE EFFECTS: see above.
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_delay_ms(uint16_t delay_ms)
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{
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asdf_arch_pulse_delay();
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}
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// PROCEDURE: asdf_arch_pulse_delay_short
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// INPUTS: none
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// OUTPUTS: none
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//
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// DESCRIPTION: Emulates a short delay by advancing the pulse detector state machine
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// for each output.
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//
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// SIDE EFFECTS: see above.
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//
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// NOTES: Set ASDF_PULSE_DELAY_US in asdf_config.h
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_pulse_delay_short(void)
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{
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asdf_arch_pulse_delay();
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}
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// PROCEDURE: asdf_arch_pos_strobe
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// INPUTS: none
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// OUTPUTS: none
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// DESCRIPTION: Initialize strobe output to positive polarity. Initial state is
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// LOW
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void asdf_arch_set_pos_strobe(void) {}
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// PROCEDURE: asdf_arch_neg_strobe
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// INPUTS: none
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// OUTPUTS: none
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// DESCRIPTION: Initialize strobe output
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void asdf_arch_set_neg_strobe(void) {}
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// PROCEDURE: asdf_arch_init
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// INPUTS: none
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// OUTPUTS: none
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//
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// DESCRIPTION: sets up all the hardware for the keyboard
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//
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// SIDE EFFECTS: see DESCRIPTION
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//
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// SCOPE: public
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//
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// COMPLEXITY: 1
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//
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void asdf_arch_init(void)
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{
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for (uint8_t i = 0; i < ASDF_PHYSICAL_NUM_RESOURCES; i++) {
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outputs[i] = 0;
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pulses[i] = PD_ST_INITIAL_STATE;
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}
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// initially, no keycodes have been sent via asdf_arch_send_code:
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code_sent = 0;
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}
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//-------|---------|---------+---------+---------+---------+---------+---------+
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// Above line is 80 columns, and should display completely in the editor.
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//
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