/*
 * MTG RFID Companion - Shared SPI bus manager
 *
 * Phase 2 Step 2.3: Initializes the single SPI2_HOST (VSPI) bus shared by
 * the ST7789 display and the MFRC522 RFID reader.
 */

#pragma once

#include "esp_err.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @brief Initialize the shared SPI2_HOST bus.
 *
 * Must be called exactly once before the display and RFID driver attach
 * their SPI devices. MFRC522 is passed a NULL bus_config so that it adds
 * its device to this pre-existing bus instead of trying to own it.
 */
esp_err_t spi_bus_manager_init(void);

#ifdef __cplusplus
}
#endif