53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
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#ifndef _BSP_TIMER_H
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#define _BSP_TIMER_H
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#include <stdint.h>
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typedef struct __attribute((__packed__)) {
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volatile uint32_t mtime; // 0x0:0
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volatile uint32_t mtimeh; // 0x4:0
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volatile uint32_t mtimecmp; // 0x8:0
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volatile uint32_t mtimecmph; // 0xc:0
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} mtimer_t;
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#ifndef APB_BUS
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typedef struct __attribute((__packed__)) {
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volatile uint16_t count;
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} prescaler_t;
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typedef struct __attribute((__packed__)) {
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volatile uint16_t clk_en; // 0x0:0, 0->always, 1->prescaler
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volatile uint16_t clr_en; // 0x2:0, 0->on overflow
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volatile uint32_t limit; // 0x4:0, upper limit of counter
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volatile uint32_t timer_value; // 0x8:0 current timer value
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} timer_a_t;
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#else
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typedef struct __attribute((__packed__)) {
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volatile uint32_t LIMIT;
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} prescaler_t;
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typedef struct __attribute((__packed__)) {
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volatile uint32_t CLEARS_TICKS; // 0x0/0:0->always, 1->prescaler; 16:0->on overflow
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volatile uint32_t LIMIT; // 0x4/0 upper limit of counter
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volatile uint32_t VALUE; // 0x8/0 current timer value
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} timer_a_t;
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inline void prescaler_init(prescaler_t* reg){
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(void)reg;
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}
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inline void timer_init(timer_a_t *reg){
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reg->CLEARS_TICKS = 0;
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reg->VALUE = 0;
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}
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inline void mtimer_init(mtimer_t *reg){
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reg->mtimecmph = UINT32_MAX;
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reg->mtimecmp = UINT32_MAX;
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}
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#endif
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#endif /* _BSP_TIMER_H */
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