68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2017-01-01 Urey first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "board.h"
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#include "board_coretimer.h"
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#include <stdint.h>
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static inline unsigned int readreg32(volatile unsigned int *addr)
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{
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return *(volatile unsigned int *)addr;
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}
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static inline void writereg32(unsigned int b, volatile unsigned int *addr)
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{
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*(volatile unsigned int *)addr = b;
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}
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void CKTimerInit(uint32_t timer_id, uint32_t freq)
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{
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uint32_t reg;
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writereg32(APB_DEFAULT_FREQ / freq, CORET_RVR);
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writereg32(0, CORET_CVR);
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reg = readreg32(CORET_CSR);
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reg |= CORETIM_TXCONTROL_ENABLE;
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reg |= CORETIM_TXCONTROL_INTMASK;
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writereg32(reg, CORET_CSR);
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return;
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}
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void CKTimerClear(uint32_t timer_id)
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{
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uint32_t reg;
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reg = readreg32(CORET_CSR);
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reg |= ~CORETIM_TXCONTROL_MODE;
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writereg32(reg, CORET_CSR);
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}
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uint32_t CKTimer_CurrentValue(void)
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{
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return readreg32(CORET_CVR);
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}
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void __attribute__((isr)) SysTick_Handler(void)
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{
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CKTimerClear(0x1);
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/* enter interrupt */
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rt_interrupt_enter();
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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}
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