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41 lines
1009 B
41 lines
1009 B
/*
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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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* 2015-04-29 ArdaFu first version
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*/
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#include "timer0.h"
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#include "asm9260t.h"
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#include "rtthread.h"
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void hw_timer0_init(void)
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{
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uint32_t pclk;
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// enable timer0's clock, reset timer0
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outl((1<<4), REG_SET(HW_AHBCLKCTRL1));
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outl((1<<4), REG_CLR(HW_PRESETCTRL1));
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outl((1<<4), REG_SET(HW_PRESETCTRL1));
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outl((1<<0), REG_CLR(HW_TIMER0_TCR));
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outl((3<<0), REG_CLR(HW_TIMER0_CTCR));
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outl((3<<0), REG_CLR(HW_TIMER0_DIR));
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outl(0, REG_CLR(HW_TIMER0_PR));
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outl(0, REG_CLR(HW_TIMER0_PC));
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outl((7<<0), REG_CLR(HW_TIMER0_MCR));
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outl((3<<0), REG_SET(HW_TIMER0_MCR));
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pclk = (inl(HW_SYSPLLCTRL)&0x1FF)*1000000u/4u;
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outl(pclk/RT_TICK_PER_SECOND, HW_TIMER0_MR0);
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outl((1<<4), REG_SET(HW_TIMER0_TCR));
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outl((1<<4), REG_CLR(HW_TIMER0_TCR));
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outl((1<<0), REG_SET(HW_TIMER0_TCR));
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}
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