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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-01-28 flybreak first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <stdio.h>
#include "board.h"
#include "hardware/structs/systick.h"
void isr_systick(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
uint32_t systick_config(uint32_t ticks)
{
if ((ticks - 1UL) > M0PLUS_SYST_RVR_RELOAD_BITS)
{
return (1UL); /* Reload value impossible */
}
mpu_hw->rvr = (uint32_t)(ticks - 1UL); /* set reload register */
mpu_hw->csr = M0PLUS_SYST_CSR_CLKSOURCE_BITS |
M0PLUS_SYST_CSR_TICKINT_BITS |
M0PLUS_SYST_CSR_ENABLE_BITS; /* Enable SysTick IRQ and SysTick Timer */
return (0UL); /* Function successful */
}
void rt_hw_board_init()
{
rt_system_heap_init(HEAP_BEGIN, HEAP_END);
alarm_pool_init_default();
// Start and end points of the constructor list,
// defined by the linker script.
extern void (*__init_array_start)();
extern void (*__init_array_end)();
// Call each function in the list.
// We have to take the address of the symbols, as __init_array_start *is*
// the first function pointer, not the address of it.
for (void (**p)() = &__init_array_start; p < &__init_array_end; ++p) {
(*p)();
}
/* Configure the SysTick */
systick_config(frequency_count_khz(CLOCKS_FC0_SRC_VALUE_ROSC_CLKSRC)*10000/RT_TICK_PER_SECOND);
stdio_init_all();
rt_hw_uart_init();
#ifdef RT_USING_CONSOLE
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
}
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