67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
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/*
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* Copyright (c) 2021, Shenzhen Academy of Aerospace Technology
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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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* 2021-11-16 Dystopia the first version
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*/
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#include "drv_timer.h"
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#include "interrupt.h"
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#include "common.h"
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#include <rthw.h>
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#include <rtthread.h>
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/**
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* This is the timer interrupt service routine.
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*
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*/
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void rt_hw_systick_isr(void)
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{
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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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/**
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* The function initial system timer interrupt.
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*/
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void rt_hw_system_timer_init(void)
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{
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// initial system timer interrupt, map local timer interrupt to INT14
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gp_cgem_regs->INTMUX3 = (CSL_GEM_TINTLN << CSL_CGEM_INTMUX3_INTSEL14_SHIFT);
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// enable CPU INT14
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rt_hw_interrupt_umask(1 << 14);
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return ;
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}
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/**
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* The function initial system timer.
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* Use local timer (== DNUM of a core) to generate a clock on TIMO0,interrupts are generated as well
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*
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*/
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void rt_hw_system_timer_start(void)
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{
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Timer64_Config tmrCfg;
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// select output on TIMO0 from local timer.
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gp_bootcfg_regs->TOUTSEL = (DNUM*2) << CSL_BOOTCFG_TOUTSEL_TOUTSEL0_SHIFT;
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// configure the timer to generate clocks and interrupts
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tmrCfg.timer_num = DNUM;
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tmrCfg.timerMode = TIMER_PERIODIC_CLOCK;
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tmrCfg.period = (unsigned long long) RT_TICK_PER_SECOND * DSP_CORE_SPEED_HZ / 6000;
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tmrCfg.reload_period = 0;
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// initial timer
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timer64_init(&tmrCfg);
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}
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