rt-thread/bsp/asm9260t/platform/timer0.c

42 lines
1009 B
C
Raw Normal View History

/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2015-04-29 ArdaFu first version
*/
#include "timer0.h"
#include "asm9260t.h"
#include "rtthread.h"
void hw_timer0_init(void)
{
uint32_t pclk;
// enable timer0's clock, reset timer0
outl((1<<4), REG_SET(HW_AHBCLKCTRL1));
outl((1<<4), REG_CLR(HW_PRESETCTRL1));
outl((1<<4), REG_SET(HW_PRESETCTRL1));
outl((1<<0), REG_CLR(HW_TIMER0_TCR));
outl((3<<0), REG_CLR(HW_TIMER0_CTCR));
outl((3<<0), REG_CLR(HW_TIMER0_DIR));
outl(0, REG_CLR(HW_TIMER0_PR));
outl(0, REG_CLR(HW_TIMER0_PC));
outl((7<<0), REG_CLR(HW_TIMER0_MCR));
outl((3<<0), REG_SET(HW_TIMER0_MCR));
pclk = (inl(HW_SYSPLLCTRL)&0x1FF)*1000000u/4u;
outl(pclk/RT_TICK_PER_SECOND, HW_TIMER0_MR0);
outl((1<<4), REG_SET(HW_TIMER0_TCR));
outl((1<<4), REG_CLR(HW_TIMER0_TCR));
outl((1<<0), REG_SET(HW_TIMER0_TCR));
}