/* * 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 } /*@}*/