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Added support for Control characters and the characters <escape> and "<>{}[]^&%=\"

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This commit is contained in:
Bruce Barnett
2022-07-10 10:36:49 -04:00
parent c44f9546e3
commit f27d75ea35
5 changed files with 170 additions and 19 deletions
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6
app/Makefile Normal file
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@ -0,0 +1,6 @@
# Make it useful for Linux
all: keyboard.c keyboard.h usb.c
cd ../build;make
install: ../build/app/i2c_puppet.uf2
cp ../build/app/i2c_puppet.uf2 /media/${USER}/RPI-RP2

71
app/keyboard.c
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@ -2,6 +2,7 @@
#include "fifo.h"
#include "keyboard.h"
#include "reg.h"
#include <stdio.h> // BGB
#include <pico/stdlib.h>
@ -114,12 +115,76 @@ static void transition_to(struct list_item * const p_item, const enum key_state
if (reg_is_bit_set(REG_ID_CFG, CFG_USE_MODS)) {
const bool shift = (self.mods[KEY_MOD_ID_SHL] || self.mods[KEY_MOD_ID_SHR]) | self.capslock;
const bool alt = self.mods[KEY_MOD_ID_ALT] | self.numlock;
const bool is_button = (key <= KEY_BTN_RIGHT1) || ((key >= KEY_BTN_LEFT2) && (key <= KEY_BTN_RIGHT2));
// const bool is_button = (key <= KEY_BTN_RIGHT1) || ((key >= KEY_BTN_LEFT2) && (key <= KEY_BTN_RIGHT2));
const bool is_button = ((key == KEY_BTN_RIGHT1)
|| (key == KEY_BTN_RIGHT2)
|| (key == KEY_BTN_LEFT1)
|| (key == KEY_BTN_LEFT2));
const bool control = self.mods[KEY_MOD_ID_SYM];
if (alt && !is_button) {
if (is_button) {
switch (key) {
case KEY_BTN_LEFT1:
if (alt) {
key = '>';
} else if (shift) {
key = '<';
} else if (control) {
key = 'x';
} else {
key =0x1B; // ESC
}
break;
case KEY_BTN_LEFT2:
if (alt) {
key = ']';
} else if (shift) {
key = '[';
} else if (control) {
key ='x';
} else {
key = '%';
}
break;
case KEY_BTN_RIGHT1:
if (alt) {
key = '}';
} else if (shift) {
key = '{';
} else if (control) {
key = 'x';
} else {
key = '=';
}
break;
case KEY_BTN_RIGHT2:
if (alt) {
key = '&';
} else if (shift) {
key = '^';
} else if (control) {
key = 'x'; // TODO
} else {
key = '\\';
}
break;
default:
// printf(" ERROR: Illegal key: %d\n", key);
;
}
} else if (alt) {
printf(" alt \n");
key = p_entry->alt;
} else if (!shift && (key >= 'A' && key <= 'Z')) {
} else if (key >= 'A' && key <= 'Z') {
printf(" letter\n");
if (control) { // If the SYM key is held down, it's a control key
key = key - 0x40;
} else if (!shift) { // lower case letter
key = (key + ' ');
} else {
// it's an uppercase letter - do nothing
}
}
}

26
app/keyboard.h
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@ -22,24 +22,24 @@ enum key_mod
KEY_MOD_ID_LAST,
};
#define KEY_JOY_UP 0x01
#define KEY_JOY_DOWN 0x02
#define KEY_JOY_LEFT 0x03
#define KEY_JOY_RIGHT 0x04
#define KEY_JOY_CENTER 0x05
#define KEY_BTN_LEFT1 0x06
#define KEY_BTN_RIGHT1 0x07
#define KEY_JOY_UP 0x81
#define KEY_JOY_DOWN 0x82
#define KEY_JOY_LEFT 0x83
#define KEY_JOY_RIGHT 0x84
#define KEY_JOY_CENTER 0x85
#define KEY_BTN_LEFT1 0x86
#define KEY_BTN_RIGHT1 0x87
// 0x08 - BACKSPACE
// 0x09 - TAB
// 0x0A - NEW LINE
// 0x0D - CARRIAGE RETURN
#define KEY_BTN_LEFT2 0x11
#define KEY_BTN_RIGHT2 0x12
#define KEY_BTN_LEFT2 0x91
#define KEY_BTN_RIGHT2 0x92
#define KEY_MOD_ALT 0x1A
#define KEY_MOD_SHL 0x1B // Left Shift
#define KEY_MOD_SHR 0x1C // Right Shift
#define KEY_MOD_SYM 0x1D
#define KEY_MOD_ALT 0x9A
#define KEY_MOD_SHL 0x9B // Left Shift
#define KEY_MOD_SHR 0x9C // Right Shift
#define KEY_MOD_SYM 0x9D
struct key_callback
{

19
app/usb.c
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@ -55,8 +55,10 @@ static void key_cb(char key, enum key_state state)
return;
if (tud_hid_n_ready(USB_ITF_KEYBOARD) && reg_is_bit_set(REG_ID_CF2, CF2_USB_KEYB_ON)) {
uint8_t conv_table[128][2] = { HID_ASCII_TO_KEYCODE };
// conv_table needs to be 256 entries long because the special keys are in range 128-256 (0x80 - 0xFF)
uint8_t conv_table[256][2] = { HID_ASCII_TO_KEYCODE };
conv_table['\n'][1] = HID_KEY_ENTER; // Fixup: Enter instead of Return
conv_table['\b'][1] = HID_KEY_BACKSPACE; // Fixup: HID backspace (0x2A) instead of \b (0x08)
conv_table[KEY_JOY_UP][1] = HID_KEY_ARROW_UP;
conv_table[KEY_JOY_DOWN][1] = HID_KEY_ARROW_DOWN;
conv_table[KEY_JOY_LEFT][1] = HID_KEY_ARROW_LEFT;
@ -66,10 +68,21 @@ static void key_cb(char key, enum key_state state)
uint8_t modifier = 0;
if (state == KEY_STATE_PRESSED) {
if (conv_table[(int)key][0])
printf(" conv_table[%d][0,1]=%d,%d ",key, conv_table[(int)key][0], conv_table[(int)key][1]); // bgb
if (conv_table[(int)key][0]) {
modifier = KEYBOARD_MODIFIER_LEFTSHIFT;
} else if (key < 0x20) { // it's a control key
if ((key == '\n') || (key == '\b')) {
// leave alone - this is necessary because the Linux graphical login processes the HID equivalent
// which is done using conv_table[] below
} else {
// convert control key, i.e. [Control-A] converts to [modifier=control, key=A]
modifier=KEYBOARD_MODIFIER_RIGHTCTRL;
key=key + 0x40;
}
keycode[0] = conv_table[(int)key][1];
}
keycode[0] = conv_table[(int)key][1];
}
if (state != KEY_STATE_HOLD)