power.c

00001 
00002 #include "nrf51.h"
00003 #include "nrf51_bitfields.h"
00004 
00005 #define POWER_PIN   8
00006 
00007 void power_on()
00008 {
00009     NRF_GPIO->PIN_CNF[POWER_PIN] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
00010                                             | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
00011                                             | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
00012                                             | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
00013                                             | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
00014     NRF_GPIO->OUTSET = (1UL << POWER_PIN);
00015 }
00016 
00017 
00018 void power_off()
00019 {
00020     NRF_GPIO->OUTCLR = (1UL << POWER_PIN);
00021     
00022     // Enter system OFF. After wakeup the chip will be reset, and the MCU will run from the top 
00023     NRF_POWER->SYSTEMOFF = 1;
00024 }