65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
#ifndef _MODULES_TIMER_H
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#define _MODULES_TIMER_H
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#include <modules/macros.h>
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#include <stdint.h>
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/*
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mod_tmu_timer_t
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Registers of a single timer.
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*/
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typedef struct
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{
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uint32_t TCOR; /* Timer constant register */
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uint32_t TCNT; /* Timer counter */
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word_union(TCR,
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uint :7;
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uint UNF :1; /* Underflow flag */
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uint :2;
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uint UNIE :1; /* Underflow interrupt enable */
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uint CKEG :2; /* Clock edge (SH7705) */
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uint TPSC :3; /* Timer prescaler */
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);
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uint16_t :16;
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} __attribute__((packed, aligned(4))) mod_tmu_timer_t;
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/*
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mod_tmu_tstr_t
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The timer start register.
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*/
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typedef struct
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{
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byte_union(,
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uint :5;
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uint STR2 :1; /* Counter start 2 */
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uint STR1 :1; /* Counter start 1 */
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uint STR0 :1; /* Counter start 0 */
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);
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} __attribute__((packed)) mod_tmu_tstr_t;
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/*
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mod_tmu_t (resides into gint memory)
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Basically three timer units and an additional register to control who's
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running.
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*/
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typedef struct
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{
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/* Timer configurations */
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volatile mod_tmu_timer_t *timers[3];
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/* Timer start register */
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volatile mod_tmu_tstr_t *TSTR;
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/* Timer input capture 2 (SH7705) */
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volatile const uint32_t *TCPR2;
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} mod_tmu_t;
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// The actual thing is there. It's initialized by gint at startup and contains
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// addresses and information suitable for the current platform.
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extern volatile mod_tmu_t TMU;
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#endif // _MODULES_TIMER
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