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/**

 * \brief Driver for key matrix module.

 */

#ifndef __key_matrix_h__

#define __key_matrix_h__

#include "drivers.h"

#define KEY_MATRIX_PRESSED_KEY          4

/**

 * \brief Initilizes a new handle for a memory mapped module.

 * \param h The handle which is initialized.

 * \param baseAddress The base addresse where the module is mapped.

 */

void key_matrix_initHandle(module_handle_t *h, scarts_addr_t baseAddress);

/**

 * \brief Free dynamically allocated resources.

 * \param h Handle.

 */

void key_matrix_releaseHandle(module_handle_t *h);

/**

 * \brief Query which button has been pressed last.

 *   This is typically done in the interrupt service routine.

 * \param h Handle.

 */

uint8_t key_matrix_get_key(module_handle_t *h);

/**

 * \brief Send acknowledgement to hardware module that interrupt

 *   has been processed. This needs to be done at the end of the

 *   interrupt service routine.

 * \param h Handle.

 */

void key_matrix_irq_ack(module_handle_t *h);

#endif // __key_matrix_h__