rt-thread-official/bsp/bm3803/applications/board.c

55 lines
1.2 KiB
C

/*
* Copyright (c) 2020, Shenzhen Academy of Aerospace Technology
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-10-16 Dystopia the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <finsh.h>
#include "board.h"
#include <interrupt.h>
extern int __bss_end;
static void rt_hw_timer_isr(int vector, void *param)
{
rt_tick_increase();
/* timer interrupt cleared by hardware */
}
int rt_hw_timer_init(void)
{
unsigned int counter = 1000000 / RT_TICK_PER_SECOND;
volatile struct lregs *regs = (struct lregs *)PREGS;
regs->scalercnt = CPU_FREQ / 1000000 - 1;
regs->scalerload = CPU_FREQ / 1000000 - 1;
regs->timercnt2 = counter - 1;
regs->timerload2 = counter - 1;
rt_hw_interrupt_install(TIMER2_TT, rt_hw_timer_isr, RT_NULL, "tick");
rt_hw_interrupt_umask(TIMER2_TT);
/* start timer */
regs->timerctrl2 = 0x7;
return 0;
}
INIT_BOARD_EXPORT(rt_hw_timer_init);
/**
* This function will initialize beaglebone board
*/
void rt_hw_board_init(void)
{
rt_system_heap_init((void *)&__bss_end, (unsigned char *)&__bss_end + 0x01000000);
rt_components_board_init();
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
}