85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
/*
|
|
* Copyright (c) 2006-2018, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* 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]);
|
|
|
|
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;
|
|
|
|
HW_ARMGLOBALTIMER_CONTROL.B.FCR0 =1;
|
|
|
|
HW_ARMGLOBALTIMER_CONTROL.B.FCR1 =0;
|
|
|
|
HW_ARMGLOBALTIMER_CONTROL.B.DBG_ENABLE =0;
|
|
|
|
// Clear counter.
|
|
HW_ARMGLOBALTIMER_COUNTER_HI_WR(0);
|
|
HW_ARMGLOBALTIMER_COUNTER_LO_WR(0);
|
|
|
|
// 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);
|
|
}
|
|
|
|
/*@}*/
|