59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2020, Shenzhen Academy of Aerospace Technology
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2020-10-16 Dystopia 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 <finsh.h>
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#include "board.h"
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#include <interrupt.h>
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extern int __bss_end;
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static void rt_hw_timer_isr(int vector, void* param)
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{
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rt_tick_increase();
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/* timer interrupt cleared by hardware */
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}
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int rt_hw_timer_init(void)
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{
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unsigned int counter = 1000000 / RT_TICK_PER_SECOND;
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volatile struct lregs *regs = (struct lregs*)PREGS;
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regs->scalercnt = CPU_FREQ / 1000000 - 1;
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regs->scalerload = CPU_FREQ / 1000000 - 1;
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regs->timercnt2 = counter - 1;
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regs->timerload2 = counter - 1;
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rt_hw_interrupt_install(TIMER2_TT, rt_hw_timer_isr, RT_NULL, "tick");
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rt_hw_interrupt_umask(TIMER2_TT);
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/* start timer */
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regs->timerctrl2 = 0x7;
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return 0;
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}
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INIT_BOARD_EXPORT(rt_hw_timer_init);
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/**
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* This function will initialize beaglebone board
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*/
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void rt_hw_board_init(void)
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{
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rt_system_heap_init((void*)&__bss_end, (void*)&__bss_end + 0x01000000);
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rt_components_board_init();
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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}
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