song zhao / smartball_project_test_board

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Dependencies:   BLE_API nRF51822

Fork of BLE_NODE_TEST by Yihui Xiong

power.c

Committer:
yihui
Date:
2014-10-29
Revision:
9:05f0b5a3a70a

File content as of revision 9:05f0b5a3a70a:


#include "nrf51.h"
#include "nrf51_bitfields.h"

#define POWER_PIN   8

void power_on()
{
    NRF_GPIO->PIN_CNF[POWER_PIN] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
                                            | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
                                            | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
                                            | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
                                            | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
    NRF_GPIO->OUTSET = (1UL << POWER_PIN);
}


void power_off()
{
    NRF_GPIO->OUTCLR = (1UL << POWER_PIN);
    
    // Enter system OFF. After wakeup the chip will be reset, and the MCU will run from the top 
    NRF_POWER->SYSTEMOFF = 1;
}