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/*
Copyright (c) 2015 Arduino LLC. All right reserved.
Copyright (c) 2016 Sandeep Mistry All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "Arduino.h"
#include "nrf.h"
#include "nrf_nvic.h"
#ifdef __cplusplus
extern "C" {
#endif
nrf_nvic_state_t nrf_nvic_state;
#define DFU_MAGIC_SERIAL_ONLY_RESET 0x4e
#define DFU_MAGIC_UF2_RESET 0x57
#define DFU_MAGIC_OTA_RESET 0xA8
// Must match temp register in bootloader
#define BOOTLOADER_VERSION_REGISTER NRF_TIMER2->CC[0]
uint32_t bootloaderVersion = 0;
void init( void )
{
// Retrieve bootloader version
bootloaderVersion = BOOTLOADER_VERSION_REGISTER;
// Select Clock Source : XTAL or RC
#if defined( USE_LFXO )
// 32Khz XTAL
NRF_CLOCK->LFCLKSRC = (uint32_t)((CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos) & CLOCK_LFCLKSRC_SRC_Msk);
#elif defined(USE_LFRC)
// Internal OSC
NRF_CLOCK->LFCLKSRC = (uint32_t)((CLOCK_LFCLKSRC_SRC_RC << CLOCK_LFCLKSRC_SRC_Pos) & CLOCK_LFCLKSRC_SRC_Msk);
#else
#error Clock Source is not configured, define USE_LFXO or USE_LFRC according to your board
#endif
NRF_CLOCK->TASKS_LFCLKSTART = 1UL;
// RTC1 could be enabled by bootloader. Disable it
NVIC_DisableIRQ(RTC1_IRQn);
NRF_RTC1->EVTENCLR = RTC_EVTEN_COMPARE0_Msk;
NRF_RTC1->INTENCLR = RTC_INTENSET_COMPARE0_Msk;
NRF_RTC1->TASKS_STOP = 1;
NRF_RTC1->TASKS_CLEAR = 1;
// Make sure all pin is set HIGH when pinmode() is called
NRF_P0->OUTSET = UINT32_MAX;
#ifdef NRF_P1
NRF_P1->OUTSET = UINT32_MAX;
#endif
}
void enterUf2Dfu(void)
{
NRF_POWER->GPREGRET = DFU_MAGIC_UF2_RESET;
NVIC_SystemReset();
}
void enterSerialDfu(void)
{
NRF_POWER->GPREGRET = DFU_MAGIC_SERIAL_ONLY_RESET;
NVIC_SystemReset();
}
void enterOTADfu(void)
{
NRF_POWER->GPREGRET = DFU_MAGIC_OTA_RESET;
NVIC_SystemReset();
}
void waitForEvent(void)
{
#if 0
// Set bit 7 and bits 4..0 in the mask to one (0x ...00 1001 1111)
enum { FPU_EXCEPTION_MASK = 0x0000009F };
/* Clear exceptions and PendingIRQ from the FPU unit */
__set_FPSCR(__get_FPSCR() & ~(FPU_EXCEPTION_MASK));
(void) __get_FPSCR();
NVIC_ClearPendingIRQ(FPU_IRQn);
#endif
uint8_t sd_en = 0;
(void) sd_softdevice_is_enabled(&sd_en);
if ( sd_en )
{
(void) sd_app_evt_wait();
}else
{
// SoftDevice is not enabled.
__WFE();
__SEV(); // Clear Event Register.
__WFE();
}
}
void systemOff(uint32_t pin, uint8_t wake_logic)
{
// for(int i=0; i<8; i++)
// {
// NRF_POWER->RAM[i].POWERCLR = 0x03UL;
// }
pin = g_ADigitalPinMap[pin];
if ( wake_logic )
{
nrf_gpio_cfg_sense_input(pin, NRF_GPIO_PIN_PULLDOWN, NRF_GPIO_PIN_SENSE_HIGH);
}else
{
nrf_gpio_cfg_sense_input(pin, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);
}
uint8_t sd_en;
(void) sd_softdevice_is_enabled(&sd_en);
// Enter System OFF state
if ( sd_en )
{
sd_power_system_off();
}else
{
NRF_POWER->SYSTEMOFF = 1;
}
}
#ifdef __cplusplus
}
#endif
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