rt-thread-official/bsp/imx6ul/drivers/board.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
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*
* SPDX-License-Identifier: Apache-2.0
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*
* Change Logs:
* Date Author Notes
* 2012-11-20 Bernard the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include "board.h"
#include <registers/regsarmglobaltimer.h>
#include <registers/regsepit.h>
#include <imx_uart.h>
#include <epit.h>
#include <cortex_a.h>
#include <mmu.h>
struct mem_desc platform_mem_desc[] = {
{0x00000000, 0x80000000, 0x00000000, DEVICE_MEM},
{0x80000000, 0xFFF00000, 0x80000000, NORMAL_MEM}
};
const rt_uint32_t platform_mem_desc_size = sizeof(platform_mem_desc)/sizeof(platform_mem_desc[0]);
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static void rt_hw_timer_isr(int vector, void *param)
{
rt_tick_increase();
epit_get_compare_event(HW_EPIT1);
}
int rt_hw_timer_init(void)
{
uint32_t freq;
// Make sure the timer is off.
HW_ARMGLOBALTIMER_CONTROL.B.TIMER_ENABLE = 0;
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HW_ARMGLOBALTIMER_CONTROL.B.FCR0 =1;
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HW_ARMGLOBALTIMER_CONTROL.B.FCR1 =0;
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HW_ARMGLOBALTIMER_CONTROL.B.DBG_ENABLE =0;
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// Clear counter.
HW_ARMGLOBALTIMER_COUNTER_HI_WR(0);
HW_ARMGLOBALTIMER_COUNTER_LO_WR(0);
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// Now turn on the timer.
HW_ARMGLOBALTIMER_CONTROL.B.TIMER_ENABLE = 1;
freq = get_main_clock(IPG_CLK);
epit_init(HW_EPIT1, CLKSRC_IPG_CLK, freq / 1000000,
SET_AND_FORGET, 10000, WAIT_MODE_EN | STOP_MODE_EN);
epit_counter_enable(HW_EPIT1, 10000, IRQ_MODE);
rt_hw_interrupt_install(IMX_INT_EPIT1, rt_hw_timer_isr, RT_NULL, "tick");
rt_hw_interrupt_umask(IMX_INT_EPIT1);
return 0;
}
INIT_BOARD_EXPORT(rt_hw_timer_init);
/**
* This function will initialize hardware board
*/
void rt_hw_board_init(void)
{
enable_neon_fpu();
disable_strict_align_check();
rt_components_board_init();
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
}
/*@}*/