97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
/*
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* Copyright (c)
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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 Email Notes
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* 2019-07-16 Kevin.Liu kevin.liu.mchp@gmail.com First Release
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*/
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#include <string.h>
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#include <atmel_start.h>
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#include "peripheral_clk_config.h"
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#include <rtthread.h>
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#include "board.h"
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#ifdef RT_USING_SERIAL
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extern int rt_hw_uart_init(void);
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#endif
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static struct io_descriptor* g_stdio;
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void rt_hw_console_output(const char *str)
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{
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io_write(g_stdio, (uint8_t *)str, strlen(str));
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while (TARGET_IO.stat != 0);
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}
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RTM_EXPORT(rt_hw_console_output);
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static inline void hw_board_init_usart(void)
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{
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usart_async_get_io_descriptor(&TARGET_IO, &g_stdio);
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usart_async_enable(&TARGET_IO);
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}
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/**
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* This is the timer interrupt service routine.
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*
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*/
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void SysTick_Handler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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}
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/**
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* This function will initial SAMC21 board.
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*/
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void rt_hw_board_init(void)
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{
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/* Initializes MCU, drivers and middleware */
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atmel_start_init();
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/* enable USART stdout module */
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hw_board_init_usart();
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/* UART driver initialization is open by default */
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#ifdef RT_USING_SERIAL
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rt_hw_uart_init();
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#endif
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/* init systick */
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SysTick_Config(CONF_CPU_FREQUENCY / RT_TICK_PER_SECOND);
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/* set pend exception priority */
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NVIC_SetPriority(PendSV_IRQn, (1 << __NVIC_PRIO_BITS) - 1);
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#ifdef RT_USING_HEAP
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#if defined(__CC_ARM) || defined(__CLANG_ARM)
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rt_system_heap_init((void*)&Image$$RW_IRAM1$$ZI$$Limit, (void*)HEAP_END);
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#elif __ICCARM__
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rt_system_heap_init((void*)HEAP_BEGIN, (void*)HEAP_END);
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#else
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/* init memory system */
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rt_system_heap_init((void*)&__bss_end, (void*)HEAP_END);
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#endif
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#endif
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/* Set the shell console output device */
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#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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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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}
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/*@}*/
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