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/*
* Copyright (c) 2006-2020, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-11-24 WangHuachen the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <dfs_fs.h>
#include "board.h"
#include "drv_timer.h"
#define ITERS_PER_USEC (XPAR_CPU_CORTEXR5_0_CPU_CLK_FREQ_HZ / 4000000)
void rt_hw_us_delay(rt_uint32_t us)
{
__asm__ __volatile__ (
"push {r0,r1,r3} \n"
"mov r0, %[usec] \n"
"mov r1, %[iter] \n"
"1: \n"
"mov r3, r1 \n"
"2: \n"
"subs r3, r3, #0x1\n"
"bne 2b \n"
"subs r0, r0, #0x1 \n"
"bne 1b \n"
"pop {r0,r1,r3} \n"
::[iter] "r" (ITERS_PER_USEC), [usec] "r" (us)
);
}
#ifdef RT_USING_CONSOLE
#include "drv_uart.h"
void rt_hw_serial_putc(const char c)
{
UART_Registers *uart = (UART_Registers *)XPAR_PSU_UART_0_BASEADDR;
if (c == '\n')
rt_hw_serial_putc('\r');
while ((uart->SR) & UART_SR_TXFULL);
uart->FIFO = c;
}
void rt_hw_console_output(const char *str)
{
while (*str)
{
rt_hw_serial_putc(*str++);
}
}
#endif
/**
* This function will initialize beaglebone board
*/
void rt_hw_board_init(void)
{
/* initialize hardware interrupt */
rt_hw_interrupt_init();
/* initialize system heap */
#ifdef RT_USING_HEAP
rt_system_heap_init(HEAP_BEGIN, HEAP_END);
#endif
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
#ifdef RT_USING_CONSOLE
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
}
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