Initial commit

2026-03-29 14:47:13 +02:00
commit b49984b9c0
32 changed files with 2394 additions and 0 deletions
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+#pragma once
+// VersaPad v2 – Logical pin names
+// All Arduino pin numbers reference the custom variant (variants/versapad/variant.h)
+
+// ─── Button Matrix ────────────────────────────────────────────────────────────
+// Layout (viewed from front):
+//
+//         COL_0  COL_1  COL_2  COL_3  COL_4
+//  ROW_0  [ENC3]  [  ]   [  ]   [  ]   [  ]
+//  ROW_1  [ENC2]  [  ]   [  ]   [  ]   [  ]
+//  ROW_2  [ENC1]  [  ]   [  ]   [  ]   [  ]
+//  ROW_3  [ENC0]  [  ]   [  ]   [  ]   [  ]
+//  ROW_4   ---    [  ]   [  ]   [  ]   [  ]
+//
+// COL_0 × ROW_0–3 = encoder push buttons
+// COL_1–4 × ROW_0–4 = 20 Cherry MX buttons
+// COL_0 × ROW_4 = not connected
+
+#define BTN_COL_COUNT  5
+#define BTN_ROW_COUNT  5
+
+// Column pins: driven OUTPUT LOW during scan, otherwise INPUT (high-Z or HIGH)
+static const uint8_t BTN_COLS[BTN_COL_COUNT] = {
+    PIN_COL0,   // PB10  – encoder SW column
+    PIN_COL1,   // PA11  – Cherry MX col 1 (leftmost)
+    PIN_COL2,   // PA10  – Cherry MX col 2
+    PIN_COL3,   // PA09  – Cherry MX col 3
+    PIN_COL4,   // PA08  – Cherry MX col 4 (rightmost)
+};
+
+// Row pins: INPUT_PULLUP, read LOW when button pressed
+static const uint8_t BTN_ROWS[BTN_ROW_COUNT] = {
+    PIN_ROW0,   // PB11
+    PIN_ROW1,   // PA12
+    PIN_ROW2,   // PA13
+    PIN_ROW3,   // PA14
+    PIN_ROW4,   // PA15
+};
+
+// Button index helper: col * ROW_COUNT + row  →  0..24
+#define BTN_INDEX(col, row)  ((col) * BTN_ROW_COUNT + (row))
+
+// Encoder SW buttons are at column 0
+#define BTN_ENC_SW(enc)  BTN_INDEX(0, (enc))   // enc = 0..3
+
+// ─── Rotary Encoders ──────────────────────────────────────────────────────────
+// ENC0 = closest to USB connector, ENC3 = furthest
+
+static const uint8_t ENC_A[4] = { PIN_ENC0_A, PIN_ENC1_A, PIN_ENC2_A, PIN_ENC3_A };
+static const uint8_t ENC_B[4] = { PIN_ENC0_B, PIN_ENC1_B, PIN_ENC2_B, PIN_ENC3_B };
+
+// ─── WS2812 LEDs ─────────────────────────────────────────────────────────────
+#define LED_COUNT     20
+#define LED_DATA_PIN  PIN_SPI_MOSI   // PB22, SERCOM5 PAD2
+
+// LED index: serpentine (even rows L→R, odd rows R→L)
+// Row 0: 0,1,2,3   Row 1: 7,6,5,4   Row 2: 8,9,10,11   Row 3: 15,14,13,12   Row 4: 16,17,18,19
+#define LED_COLS  (BTN_COL_COUNT - 1)   // 4 Cherry MX columns
+#define LED_INDEX(col, row) \
+    ((row) * LED_COLS + (((row) & 1) ? (LED_COLS - (col)) : ((col) - 1)))
+
+// ─── Faders (ADC) ─────────────────────────────────────────────────────────────
+#define FADER_COUNT  3
+static const uint8_t FADER_PINS[FADER_COUNT] = {
+    PIN_FADER0,   // PA02  A0
+    PIN_FADER1,   // PA03  A1  (also VREFA – analog only, no digitalRead)
+    PIN_FADER2,   // PB08  A2
+};