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#ifndef _LCOM_I8254_H_
#define _LCOM_I8254_H_

/** @defgroup i8254 i8254
 * @{
 *
 * Constants for programming the i8254 Timer. Needs to be completed.
 */

#define TIMER_FREQ  1193182    /**< @brief clock frequency for timer in PC and AT */

#define BIT(n) (0x01<<(n))

#define TIMER0_IRQ	        0    /**< @brief Timer 0 IRQ line */

/* I/O port addresses */

#define TIMER_0			0x40 /**< @brief Timer 0 count register */
#define TIMER_1			0x41 /**< @brief Timer 1 count register */
#define TIMER_2			0x42 /**< @brief Timer 2 count register */
#define TIMER_CTRL		0x43 /**< @brief Control register */

#define SPEAKER_CTRL		0x61 /**< @brief Register for speaker control  */

/* Timer control */

/* Timer selection: bits 7 and 6 */

#define TIMER_SEL0		0x00     /**< @brief Control Word for Timer 0 */
#define TIMER_SEL1		BIT(6)   /**< @brief Control Word for Timer 1 */
#define TIMER_SEL2		BIT(7)   /**< @brief Control Word for Timer 2 */
#define TIMER_RB_CMD		(BIT(7)|BIT(6))  /**< @brief Read Back Command */

/* Register selection: bits 5 and 4 */

#define TIMER_LSB		BIT(4)  /**< @brief Initialize Counter LSB only */
#define TIMER_MSB		BIT(5)  /**< @brief Initialize Counter MSB only */
#define TIMER_LSB_MSB		(TIMER_LSB | TIMER_MSB) /**< @brief Initialize LSB first and MSB afterwards */

/* Operating mode: bits 3, 2 and 1 */
#define TIMER_HW_TRIG_STROBE	(BIT(3)|BIT(1)) 	/*Mode 5*/
#define TIMER_SW_TRIG_STROBE	BIT(3)				/*Mode 4*/
#define TIMER_SQR_WAVE			(BIT(2)|BIT(1)) 	/*Mode 3: square wave generator */
#define TIMER_RATE_GEN			BIT(2)          	/*Mode 2: rate generator */
#define TIMER_HW_RETRIG_1S		(BIT(1))			/*Mode 1*/
#define TIMER_INT_TERM_CNT		0x00				/*Mode 0*/
#define TIMER_INTEL_COMP		BIT(3)			/*Redundancia*/

/* Counting mode: bit 0 */

#define TIMER_BCD			0x01   /**< @brief Count in BCD */
#define TIMER_BIN			0x00   /**< @brief Count in binary */

/* READ-BACK COMMAND FORMAT */

#define TIMER_RB_COUNT_         BIT(5)
#define TIMER_RB_STATUS_        BIT(4)
#define TIMER_RB_SEL(n)         BIT((n)+1)



/**@}*/

#endif /* _LCOM_I8254_H */