112 lines
4.1 KiB
C
112 lines
4.1 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2020 by Federico Amedeo Izzo IU2NUO, *
|
|
* Niccolò Izzo IU2KIN *
|
|
* Frederik Saraci IU2NRO *
|
|
* Silvano Seva IU2KWO *
|
|
* *
|
|
* 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 <http://www.gnu.org/licenses/> *
|
|
***************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include "gpio.h"
|
|
#include "delays.h"
|
|
#include "keyboard.h"
|
|
#include "hwconfig.h"
|
|
|
|
void kbd_init()
|
|
{
|
|
/* Set the two row lines as outputs */
|
|
gpio_setMode(KB_ROW1, OUTPUT);
|
|
gpio_setMode(KB_ROW2, OUTPUT);
|
|
gpio_setMode(KB_ROW3, OUTPUT);
|
|
gpio_clearPin(KB_ROW1);
|
|
gpio_clearPin(KB_ROW2);
|
|
gpio_clearPin(KB_ROW3);
|
|
}
|
|
|
|
void kbd_terminate()
|
|
{
|
|
/* Back to default state */
|
|
gpio_clearPin(KB_ROW1);
|
|
gpio_clearPin(KB_ROW2);
|
|
gpio_clearPin(KB_ROW3);
|
|
gpio_setMode(KB_ROW1, INPUT);
|
|
gpio_setMode(KB_ROW2, INPUT);
|
|
gpio_setMode(KB_ROW3, INPUT);
|
|
}
|
|
|
|
uint32_t kbd_getKeys()
|
|
{
|
|
/*
|
|
* First of all, configure the row lines as inputs. Since they are in common
|
|
* with the display, their configuration can have been screwed up by display
|
|
* driver among two subsequent calls of this function.
|
|
*/
|
|
gpio_setMode(LCD_D0, INPUT);
|
|
gpio_setMode(LCD_D1, INPUT);
|
|
gpio_setMode(LCD_D2, INPUT);
|
|
gpio_setMode(LCD_D3, INPUT);
|
|
gpio_setMode(LCD_D4, INPUT);
|
|
gpio_setMode(LCD_D5, INPUT);
|
|
gpio_setMode(LCD_D6, INPUT);
|
|
gpio_setMode(LCD_D7, INPUT);
|
|
|
|
/*
|
|
* Scan keyboard by coloumns.
|
|
* For key configuration, see: https://www.qsl.net/dl4yhf/RT3/md380_hw.html#keyboard
|
|
*
|
|
* Keys coloumns (LCD_D...) have 1k series resistor and a 10pF capacitor
|
|
* connected to ground, making a low-pass filter with a settling time of
|
|
* ~50ns. CPU runs at 168MHz and 50ns are approximately eigth instructions,
|
|
* this means that we have to put a small delay before reading the GPIOs to
|
|
* allow voltage to settle.
|
|
*/
|
|
uint32_t keys = 0;
|
|
gpio_setPin(KB_ROW1);
|
|
|
|
delayUs(1);
|
|
if(gpio_readPin(LCD_D7)) keys |= KEY_STAR;
|
|
if(gpio_readPin(LCD_D2)) keys |= KEY_3;
|
|
if(gpio_readPin(LCD_D1)) keys |= KEY_2;
|
|
if(gpio_readPin(LCD_D0)) keys |= KEY_1;
|
|
if(gpio_readPin(LCD_D6)) keys |= KEY_0;
|
|
if(gpio_readPin(LCD_D5)) keys |= KEY_6;
|
|
if(gpio_readPin(LCD_D4)) keys |= KEY_5;
|
|
if(gpio_readPin(LCD_D3)) keys |= KEY_4;
|
|
|
|
gpio_clearPin(KB_ROW1);
|
|
gpio_setPin(KB_ROW2);
|
|
|
|
delayUs(1);
|
|
if(gpio_readPin(LCD_D7)) keys |= KEY_ESC;
|
|
if(gpio_readPin(LCD_D2)) keys |= KEY_DOWN;
|
|
if(gpio_readPin(LCD_D1)) keys |= KEY_UP;
|
|
if(gpio_readPin(LCD_D0)) keys |= KEY_ENTER;
|
|
if(gpio_readPin(LCD_D6)) keys |= KEY_HASH;
|
|
if(gpio_readPin(LCD_D5)) keys |= KEY_9;
|
|
if(gpio_readPin(LCD_D4)) keys |= KEY_8;
|
|
if(gpio_readPin(LCD_D3)) keys |= KEY_7;
|
|
|
|
gpio_clearPin(KB_ROW2);
|
|
gpio_setPin(KB_ROW3);
|
|
|
|
delayUs(1);
|
|
if(gpio_readPin(FUNC_SW)) keys |= KEY_F1;
|
|
if(gpio_readPin(MONI_SW)) keys |= KEY_MONI;
|
|
|
|
gpio_clearPin(KB_ROW3);
|
|
return keys;
|
|
}
|