diff --git a/platform/drivers/keyboard/keyboard_DM1701.c b/platform/drivers/keyboard/keyboard_DM1701.c new file mode 100644 index 00000000..14a84a13 --- /dev/null +++ b/platform/drivers/keyboard/keyboard_DM1701.c @@ -0,0 +1,166 @@ +/*************************************************************************** + * Copyright (C) 2023 by Federico Amedeo Izzo IU2NUO, * + * Niccolò Izzo IU2KIN, * + * Frederik Saraci IU2NRO * + * Silvano Seva IU2KWO * + * Amo BD4VOW * + * * + * 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 * + ***************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include "hwconfig.h" + +static int8_t old_pos = 0; + +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); + + /* Initialise old position */ + old_pos = platform_getChSelector(); +} + +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); +} + +keyboard_t kbd_getKeys() +{ + keyboard_t keys = 0; + + /* Read channel knob to send KNOB_LEFT and KNOB_RIGHT events */ + int8_t new_pos = platform_getChSelector(); + if (old_pos != new_pos) + { + int8_t diff = new_pos - old_pos; + if (diff < 0) + keys |= KNOB_LEFT; + else if (diff > 0) + keys |= KNOB_RIGHT; + else + { + if (old_pos < 0) + keys |= KNOB_LEFT; + else + keys |= KNOB_RIGHT; + } + old_pos = new_pos; + } + + + /* + * The row lines are in common with the display, so we have to configure + * them as inputs before scanning. However, before configuring them as inputs, + * we put them as outputs and force a low logical level in order to be sure + * that any residual charge on both the display controller's inputs and in + * the capacitors in parallel to the Dx lines is dissipated. + */ + gpio_setMode(LCD_D0, OUTPUT); + gpio_setMode(LCD_D1, OUTPUT); + gpio_setMode(LCD_D2, OUTPUT); + gpio_setMode(LCD_D3, OUTPUT); + gpio_setMode(LCD_D4, OUTPUT); + gpio_setMode(LCD_D5, OUTPUT); + gpio_setMode(LCD_D6, OUTPUT); + gpio_setMode(LCD_D7, OUTPUT); + + gpio_clearPin(LCD_D0); + gpio_clearPin(LCD_D1); + gpio_clearPin(LCD_D2); + gpio_clearPin(LCD_D3); + gpio_clearPin(LCD_D4); + gpio_clearPin(LCD_D5); + gpio_clearPin(LCD_D6); + gpio_clearPin(LCD_D7); + + + gpio_setMode(LCD_D0, INPUT_PULL_DOWN); + gpio_setMode(LCD_D1, INPUT_PULL_DOWN); + gpio_setMode(LCD_D2, INPUT_PULL_DOWN); + gpio_setMode(LCD_D3, INPUT_PULL_DOWN); + gpio_setMode(LCD_D4, INPUT_PULL_DOWN); + gpio_setMode(LCD_D5, INPUT_PULL_DOWN); + gpio_setMode(LCD_D6, INPUT_PULL_DOWN); + gpio_setMode(LCD_D7, INPUT_PULL_DOWN); + + /* + * 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. + */ + gpio_setPin(KB_ROW1); + + delayUs(10); + if(gpio_readPin(LCD_D0)) keys |= KEY_1; + if(gpio_readPin(LCD_D1)) keys |= KEY_4; + if(gpio_readPin(LCD_D2)) keys |= KEY_7; + if(gpio_readPin(LCD_D3)) keys |= KEY_STAR; + if(gpio_readPin(LCD_D4)) keys |= KEY_UP; + // if(gpio_readPin(LCD_D5)) + // if(gpio_readPin(LCD_D6)) + // if(gpio_readPin(LCD_D7)) + + gpio_clearPin(KB_ROW1); + gpio_setPin(KB_ROW2); + + delayUs(10); + if(gpio_readPin(LCD_D0)) keys |= KEY_2; + if(gpio_readPin(LCD_D1)) keys |= KEY_5; + if(gpio_readPin(LCD_D2)) keys |= KEY_8; + if(gpio_readPin(LCD_D3)) keys |= KEY_0; + if(gpio_readPin(LCD_D4)) keys |= KEY_DOWN; + if(gpio_readPin(LCD_D5)) keys |= KEY_ESC; + if(gpio_readPin(LCD_D6)) keys |= KEY_ENTER; + // if(gpio_readPin(LCD_D7)) + + gpio_clearPin(KB_ROW2); + gpio_setPin(KB_ROW3); + + delayUs(10); + if(gpio_readPin(LCD_D0)) keys |= KEY_3; + if(gpio_readPin(LCD_D1)) keys |= KEY_6; + if(gpio_readPin(LCD_D2)) keys |= KEY_9; + if(gpio_readPin(LCD_D3)) keys |= KEY_HASH; + // if(gpio_readPin(LCD_D4)) + if(gpio_readPin(LCD_D5)) keys |= KEY_F1; + if(gpio_readPin(LCD_D6)) keys |= KEY_MONI; + if(gpio_readPin(LCD_D7)) keys |= KEY_F2; + + gpio_clearPin(KB_ROW3); + return keys; +}