85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
// -*- mode: C; tab-width: 2 ; indent-tabs-mode: nil -*-
|
|
//
|
|
// Unfified Keyboard Project
|
|
// ASDF keyboard firmware
|
|
//
|
|
// main.c
|
|
//
|
|
// main program loop. Initialize hardware. Schedule key scans and i/o.
|
|
//
|
|
// Copyright 2019 David Fenyes
|
|
//
|
|
// 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 3 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, see <https://www.gnu.org/licenses/>.
|
|
|
|
#include <stdint.h>
|
|
#include "asdf.h"
|
|
#include "asdf_arch.h"
|
|
#include "asdf_buffer.h"
|
|
#include "asdf_hook.h"
|
|
|
|
// PROCEDURE: main
|
|
// INPUTS: none
|
|
// OUTPUTS: none
|
|
//
|
|
// DESCRIPTION: Initialize hardware, Schedule key scans and i/o
|
|
//
|
|
// SIDE EFFECTS: See above
|
|
//
|
|
// NOTES: This code just initializes the hardware, and then loops. The loop
|
|
// includes:
|
|
//
|
|
// - Check every 1 ms (or whatever the tick is set to), calls the keyboard
|
|
// scan routine.
|
|
//
|
|
// - Check every pass through if any characters are buffered to send. If so,
|
|
// send them.
|
|
//
|
|
// This is not the most efficient use of the hardware, but is an example of how
|
|
// the keyboard scanner is used. Of course, this loop can be replaced with an
|
|
// RTOS process as well. If an RTOS is used, then asdf_buffer can be modified
|
|
// to use RTOS message queues instead of an internal buffer, or to keep the
|
|
// internal buffer and use a counting semaphore to indicate characters in the
|
|
// buffer.
|
|
//
|
|
// If you are adding special functions when using an RTOS, make sure the
|
|
// functions do not block, or do any heavy computation. Rather, they should be
|
|
// small and pass messages to appropriate processes to handle the activities.
|
|
//
|
|
// COMPLEXITY: 2
|
|
//
|
|
int main(void)
|
|
{
|
|
// initialize the keyboard logic:
|
|
asdf_init();
|
|
|
|
while (1) {
|
|
|
|
if (asdf_arch_tick()) {
|
|
asdf_keycode_t code = asdf_next_code();
|
|
|
|
if (code < ASDF_INVALID_CODE) {
|
|
// This is inside the loop because the output function may change
|
|
void (*output_function)(asdf_keycode_t) =
|
|
(void (*)(asdf_keycode_t)) asdf_hook_get(ASDF_HOOK_OUTPUT);
|
|
(*output_function)(code);
|
|
}
|
|
asdf_keyscan();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//-------|---------|---------+---------+---------+---------+---------+---------+
|
|
// Above line is 80 columns, and should display completely in the editor.
|