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/**
* T-Modem-c1224 pin map (service Pico — not softmodem).
* Frozen copper intent (v0.25 schematic) reused as planning default for 180×180.
* GP14/GP15 = unused mux placeholders for v1.0 (single-XTAL; stuff matches image).
*/
#ifndef C1224_BOARD_PINS_H
#define C1224_BOARD_PINS_H
#include <stdint.h>
#include <stdbool.h>
/* I2C LCD (shared-kit class; level-shifted on board) */
#define PIN_I2C_SDA 0 /* GP0 */
#define PIN_I2C_SCL 1 /* GP1 */
#define I2C_LCD_BAUDRATE 100000
#define I2C_LCD_ADDR_DEFAULT 0x27 /* common PCF8574 backpack; probe may fail → log-only */
/* Modem chip digital (TCM3105-class) — Pico does NOT generate AFSK */
#define PIN_MODEM_TXD 6 /* GP6 → chip TXD */
#define PIN_MODEM_RXD 7 /* GP7 ← chip RXD → Packet UI sense (required · status only) */
#define PIN_MODEM_CDT 8 /* GP8 ← chip CDT → Signal/RX (required) */
/* PTT keying: Pico GPIO → OC → radio PTT (USB CDC service). Not the TX LED. */
#define PIN_PTT_DRV 9 /* GP9 · required for USB PTT ON */
/*
* Status LEDs (c1224 copper — active-high source via series R; LED cathode = GND).
* LED_PWR is NOT a GPIO: +5V_OR → R_LED1 → LED_PWR → GND (rail Power indicator).
*
* Settled UI (2026-07-26):
* - Dual sense REQUIRED: CDT→GP8 Signal/RX · RXD→GP7 Packet (status only, not data bridge).
* - CDT = carrier/tone · RXD activity ≠ full AX.25 decode.
* - LED_PTT (GP10) = OPTIONAL/SPARE — not required product TX indicator.
* - Display TX optional; PTT keying GPIO (GP9) stays separate from LED_PTT.
* - LED_TXRX = spare/activity.
*/
#define PIN_LED_PTT 10 /* GP10 · LED_PTT_N · optional/spare (not required TX LED) */
#define PIN_LED_DCD 11 /* GP11 · LED_DCD_N · optional RX mirror of CDT */
#define PIN_LED_TXRX 12 /* GP12 · LED_TXRX_N · spare / optional activity */
/*
* Crystal mux placeholders — UNUSED for v1.0.
* Product: one crystal stuffed matching flash (Y1 4.4336 / Y2 6.5536).
* Dual/mux path abandoned; crystal_steer is a no-op.
* Optional keep defines if mux ever returns later.
*/
#define PIN_XTAL_SEL_A 14 /* GP14 — unused v1.0 */
#define PIN_XTAL_SEL_B 15 /* GP15 — unused v1.0 */
void board_pins_init(void);
#endif /* C1224_BOARD_PINS_H */
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