95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
/*
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* File : board_timer.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2008 - 2016, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2015-11-19 Urey the 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 <rtdevice.h>
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#include <stdint.h>
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#include "board.h"
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#include "drv_clock.h"
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#include "drv_ost.h"
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/**
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* This is the OST timer interrupt service routine.
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*/
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void rt_hw_ost_handler(void)
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{
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/* increase a OS tick */
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rt_tick_increase();
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/* clear flag */
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REG_OSTFR = 0;
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}
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int rt_hw_ost_init(void)
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{
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rt_uint32_t cnt, div;
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struct clk *clk;
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div = OST_DIV16;
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cnt = BOARD_EXTAL_CLK / 16;
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/* enable OST clock */
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clk = clk_get("sys_ost");
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clk_enable(clk);
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/* Disable OST (channel 1/2) */
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REG_OSTECR = 0x3;
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/* clear counter */
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REG_OSTCR = 0x01;
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REG_OST1CNT = 0;
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/* set timer data (channel 1) */
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REG_OST1DFR = (cnt / RT_TICK_PER_SECOND - 1);
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/* set prescale ext clk */
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REG_OSTCCR = div;
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/* unmask interrupt */
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REG_OSTMR = 0;
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/* enable OST (channel 1) */
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REG_OSTESR = 0x01;
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clk_put(clk);
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return 0;
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}
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#include <finsh.h>
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int ost(int argc, char** argv)
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{
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rt_kprintf("OSTCCR = 0x%08x\n", REG_OSTCCR);
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rt_kprintf("OSTER = 0x%08x\n", REG_OSTER);
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rt_kprintf("count = 0x%08x\n", REG_OST1CNT);
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rt_kprintf("TCU_TER = 0x%08x\n", REG_TCU_TER);
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return 0;
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}
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MSH_CMD_EXPORT(ost, ost debug);
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