rt-thread-official/bsp/microchip/samc21/board/board.c

97 lines
2.0 KiB
C

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