types.hpp

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/**
 * @file types.hpp
 * @brief Interrupt system types and enumerations
 * @ingroup hal
 * 
 * Common interrupt types shared across the interrupt system.
 * Simple enumerations and data structures - no behavior.
 */
 
#ifndef SBL_HAL_INTERRUPTS_TYPES_HPP_
#define SBL_HAL_INTERRUPTS_TYPES_HPP_
 
#include <cstdint>
 
namespace sbl {
namespace hal {
namespace interrupts {
 
/**
 * @brief Interrupt priority levels for ARM Cortex-M
 * 
 * ARM Cortex-M uses lower numerical values for higher priority.
 * These values map directly to ARM NVIC priority levels.
 */
enum class Priority : uint8_t {
    Highest = 0,    ///< Highest priority (0)
    High = 4,       ///< High priority  
    Medium = 8,     ///< Medium priority
    Low = 12,       ///< Low priority
    Lowest = 15     ///< Lowest priority (15)
};
 
/**
 * @brief External interrupt trigger types
 */
enum class Trigger : uint8_t {
    Rising,         ///< Rising edge trigger
    Falling,        ///< Falling edge trigger  
    Change,         ///< Any edge (rising or falling)
    Low,            ///< Low level trigger
    High            ///< High level trigger
};
 
/**
 * @brief Interrupt handler function type
 * 
 * Keep interrupt handlers fast and minimal.
 * Avoid blocking operations in ISR context.
 */
using Handler = void(*)();
 
} // namespace interrupts
} // namespace hal
} // namespace sbl
 
#endif // SBL_HAL_INTERRUPTS_TYPES_HPP_