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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-04-29 supperthomas first version
*
*/
#include <rtthread.h>
#include <rthw.h>
#include <nrfx_systick.h>
#include "board.h"
#include "drv_uart.h"
#include <nrfx_clock.h>
/**
* This is the timer interrupt service routine.
*
*/
void SysTick_Handler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
static void clk_event_handler(nrfx_clock_evt_type_t event){}
void SysTick_Configuration(void)
{
nrfx_clock_init(clk_event_handler);
nrfx_clock_enable();
nrfx_clock_lfclk_start();
/* Set interrupt priority */
NVIC_SetPriority(SysTick_IRQn, 0xf);
/* Configure SysTick to interrupt at the requested rate. */
nrf_systick_load_set(SystemCoreClock / RT_TICK_PER_SECOND);
nrf_systick_val_clear();
nrf_systick_csr_set(NRF_SYSTICK_CSR_CLKSOURCE_CPU | NRF_SYSTICK_CSR_TICKINT_ENABLE
| NRF_SYSTICK_CSR_ENABLE);
}
/**
* The time delay function.
*
* @param microseconds.
*/
void rt_hw_us_delay(rt_uint32_t us)
{
rt_uint32_t ticks;
rt_uint32_t told, tnow, tcnt = 0;
rt_uint32_t reload = SysTick->LOAD;
ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
told = SysTick->VAL;
while (1)
{
tnow = SysTick->VAL;
if (tnow != told)
{
if (tnow < told)
{
tcnt += told - tnow;
}
else
{
tcnt += reload - tnow + told;
}
told = tnow;
if (tcnt >= ticks)
{
break;
}
}
}
}
void rt_hw_board_init(void)
{
rt_hw_interrupt_enable(0);
// sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
/* Activate deep sleep mode */
SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
SysTick_Configuration();
#if defined(RT_USING_HEAP)
rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
#endif
#ifdef RT_USING_SERIAL
rt_hw_uart_init();
#endif
#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
#ifdef BSP_USING_SOFTDEVICE
extern uint32_t Image$$RW_IRAM1$$Base;
uint32_t const *const m_ram_start = &Image$$RW_IRAM1$$Base;
if ((uint32_t)m_ram_start == 0x20000000)
{
rt_kprintf("\r\n using softdevice the RAM couldn't be %p,please use the templete from package\r\n", m_ram_start);
while (1);
}
else
{
rt_kprintf("\r\n using softdevice the RAM at %p\r\n", m_ram_start);
}
#endif
}
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