2026-03-07 16:15:28 +08:00
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#pragma once
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#include <stdbool.h>
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#include <stddef.h>
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2026-03-09 00:23:03 +08:00
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/* GPIO defaults for ESP32-S3-LCD-1.47B safe user-accessible pins */
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2026-03-07 16:15:28 +08:00
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#define MIMI_GPIO_MIN_PIN 1
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#define MIMI_GPIO_MAX_PIN 21
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2026-03-09 00:23:03 +08:00
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#define MIMI_GPIO_ALLOWED_CSV "1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,21,38,46"
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2026-03-07 16:15:28 +08:00
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/**
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* Check if a pin is allowed for user GPIO operations.
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* Validates against the allowlist or default range, and blocks
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* pins reserved for flash/PSRAM on ESP32.
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*/
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bool gpio_policy_pin_is_allowed(int pin);
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/**
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* Write a human-readable hint if the pin is forbidden for a known reason.
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* Returns true if a hint was written (and the caller should return the error).
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*/
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bool gpio_policy_pin_forbidden_hint(int pin, char *result, size_t result_len);
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