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keybrd/tutorials/keybrd_3b_autoShift/keybrd_3b_autoShift.ino

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/* keybrd_3_autoShift_annotated.ino
This sketch:
is a simple 2-layer keyboard with AutoShift
runs on the first two rows and columns of a breadboard keyboard
| Layout | **0** | **1** |
|:------:|-------|-------|
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| **0** | shift | a ! |
| **1** | fn | b @ |
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The layered keys in row 0 have two layers; one character for each layer.
Letters 'a' and 'b' are on the normal layer. Symbols '!' and '@' are one the fn layer.
Holding the fn key down makes it the active layer. Releasing the fn key restores the normal layer.
*/
// ################## GLOBAL ###################
// ================= INCLUDES ==================
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//Keys
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#include <Code_Sc.h>
#include <Code_ScS.h>
#include <Code_Shift.h>
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#include <LayerState.h>
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#include <Code_LayerHold.h>
#include <Key_LayeredKeysArray.h>
//Matrix
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#include <Row_uC.h>
#include <ScanDelay.h>
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// ============ SPEED CONFIGURATION ============
ScanDelay scanDelay(9000);
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// ================ ACTIVE STATE ===============
const bool Scanner_uC::STROBE_ON = LOW;
const bool Scanner_uC::STROBE_OFF = HIGH;
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// =================== PINS ====================
uint8_t readPins[] = {14, 15};
uint8_t READ_PIN_COUNT = sizeof(readPins)/sizeof(*readPins);
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// =================== CODES ===================
// ---------------- LAYER CODE -----------------
enum layers { NORMAL, FN };
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LayerState layerState;
Code_LayerHold l_fn(FN, layerState);
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/* ---------------- SCAN CODES -----------------
The "Sc" in Code_Sc means "scancode".
When a Code_Sc is pressed, it sends its scancode.
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*/
Code_Sc s_a(KEY_A);
Code_Sc s_b(KEY_B);
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/* The "ScS" in Code_ScS means "scancode shifted".
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When Code_ScS is pressed, it calls Code_AutoShift before sending its scancode.
*/
Code_ScS s_exclamation(KEY_1);
Code_ScS s_at(KEY_2);
// ----------------- SHIFT CODE ----------------
/*
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The Code_Shift constructor takes one shift scancode.
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*/
Code_Shift s_shift(MODIFIERKEY_LEFT_SHIFT);
/*
Code_Shift pointers are placed in an array because most keyboards have a left and right shift.
This sketch only has one shift code.
*/
Code_Shift* const ptrsS[] = { &s_shift };
Code_Shift* const* const Code_AutoShift::ptrsShifts = ptrsS;
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const uint8_t Code_AutoShift::shiftCount = sizeof(ptrsS)/sizeof(*ptrsS);
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/*
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HOW SHIFT WORKS
When a shift key is pressed, a standard keyboard driver will temporarily modify the normal action of another key when pressed together.
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KEY_1 writes '1'
MODIFIERKEY_LEFT_SHIFT + KEY_1 writes '!'
KEY_2 writes '2'
MODIFIERKEY_LEFT_SHIFT + KEY_2 writes '@'
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HOW AUTOSHIFT WORKS
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Code_ScS takes care of the MODIFIERKEY_LEFT_SHIFT automatically
When the user presses '!' or '@' on the fn layer:
Code_AutoShift checks the position of each shift key
Code_ScS sends MODIFIERKEY_LEFT_SHIFT scancode if needed
Code_ScS sends its scancode
*/
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// =================== KEYS ====================
Key* const ptrsCodes_01[] = { &s_a, &s_exclamation };
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Key_LayeredKeysArray k_01(ptrsCodes_01);
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Key* const ptrsCodes_11[] = { &s_b, &s_at };
Key_LayeredKeysArray k_11(ptrsCodes_11);
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LayerStateInterface& Key_LayeredKeysArray::refLayerState = layerState;
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// =================== ROWS ====================
Key* const ptrsKeys_0[] = { &s_shift, &k_01 };
Row_uC row_0(0, readPins, READ_PIN_COUNT, ptrsKeys_0);
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Key* const ptrsKeys_1[] = { &l_fn, &k_11 };
Row_uC row_1(1, readPins, READ_PIN_COUNT, ptrsKeys_1);
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// ################### MAIN ####################
void setup()
{
Keyboard.begin();
}
void loop()
{
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row_0.process();
row_1.process();
scanDelay.delay();
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}