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