nRF51_lowpwr.cpp

00001 /*
00002  * mbed library program
00003  *  Set low power condition only for nRF51822 BLE chip
00004  *
00005  *  Copyright (c) 2016 Kenji Arai / JH1PJL
00006  *  http://www.page.sannet.ne.jp/kenjia/index.html
00007  *  http://mbed.org/users/kenjiArai/
00008  *      Started:    April     30th, 2016
00009  *      Revised:    June      11th, 2016
00010  *
00011  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
00012  * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
00013  * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00014  * DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00015  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00016  */
00017 
00018 #include "mbed.h"
00019 #include "nRF51_lowpwr.h"
00020 #include "nrf_delay.h"
00021 
00022 LowPwr::LowPwr(const nRF51_LOWPWR_TypeDef *param){
00023     if ((param->std_printf_function == false) && (param->serial_function == false)){
00024         //#warning    "Disable Serial function (cannot use printf)!"
00025         NRF_UART0->ENABLE           = 0;
00026         nrf_delay_us(5);
00027         NRF_UART0->EVENTS_RXDRDY    = 0;
00028         nrf_delay_us(5);
00029         //NRF_UART0->INTENCLR = 0x00020287;
00030         NRF_UART0->INTENCLR         = 0xffffffff;
00031         nrf_delay_us(5);
00032         NRF_UART0->TASKS_STOPRX     = 1;
00033         nrf_delay_us(5);
00034         NRF_UART0->POWER            = 0;
00035         nrf_delay_us(5);
00036     }
00037     if (param->i2c_function == false){
00038         //#warning    "Disable I2C function!"
00039         NRF_TWI0->EVENTS_ERROR      = 0;
00040         nrf_delay_us(5);
00041         NRF_TWI0->INTENCLR          = 0xffffffff;
00042         nrf_delay_us(5);
00043         NRF_TWI0->ENABLE            = 0;
00044         nrf_delay_us(5);
00045         NRF_TWI0->POWER             = 0;
00046         nrf_delay_us(5);
00047         NRF_TWI1->EVENTS_ERROR      = 0;
00048         nrf_delay_us(5);
00049         NRF_TWI1->INTENCLR          = 0xffffffff;
00050         nrf_delay_us(5);
00051         NRF_TWI1->ENABLE            = 0;
00052         nrf_delay_us(5);
00053         NRF_TWI1->POWER             = 0;
00054     }
00055     if ((param->spi_function == false) && (param->spi_slave_function == false)){
00056         //#warning    "Disable SPI function!"
00057         NRF_SPI0->INTENCLR          = 0xffffffff;
00058         nrf_delay_us(5);
00059         NRF_SPI0->ENABLE            = 0;
00060         nrf_delay_us(5);
00061         NRF_SPI0->POWER             = 0;
00062         nrf_delay_us(5);
00063         NRF_SPI1->INTENCLR          = 0xffffffff;
00064         nrf_delay_us(5);
00065         NRF_SPI1->ENABLE            = 0;
00066         nrf_delay_us(5);
00067         NRF_SPI1->POWER             = 0;
00068         nrf_delay_us(5);
00069         NRF_SPIS1->INTENCLR          = 0xffffffff;
00070         nrf_delay_us(5);
00071         NRF_SPIS1->ENABLE            = 0;
00072         nrf_delay_us(5);
00073         NRF_SPIS1->POWER             = 0;
00074     }
00075     if (param->pwm_functions == false){
00076         //#warning    "Disable PWM function!"
00077         // Timer0,1,2
00078         NRF_TIMER0->INTENCLR        = 0xffffffff;
00079         nrf_delay_us(5);
00080         NRF_TIMER0->TASKS_STOP      = 1;
00081         nrf_delay_us(5);
00082         NRF_TIMER0->POWER           = 0;
00083         nrf_delay_us(5);
00084         NRF_TIMER1->INTENCLR        = 0xffffffff;
00085         nrf_delay_us(5);
00086         NRF_TIMER1->TASKS_STOP      = 1;
00087         nrf_delay_us(5);
00088         NRF_TIMER1->POWER           = 0;
00089         nrf_delay_us(5);
00090         NRF_TIMER2->INTENCLR        = 0xffffffff;
00091         nrf_delay_us(5);
00092         NRF_TIMER2->TASKS_STOP      = 1;
00093         nrf_delay_us(5);
00094         NRF_TIMER2->POWER           = 0;
00095         nrf_delay_us(5);
00096         // PPI
00097         NRF_PPI->TASKS_CHG[0].DIS   = 1;
00098         NRF_PPI->TASKS_CHG[1].DIS   = 1;
00099         NRF_PPI->TASKS_CHG[2].DIS   = 1;
00100         NRF_PPI->TASKS_CHG[3].DIS   = 1;
00101         for (uint8_t n = 0; n <16 ; n++){
00102             NRF_PPI->CH[n].TEP = 0;
00103             NRF_PPI->CH[n].EEP = 0;
00104         }
00105     }
00106     if (param->analog_function == false){
00107         //#warning    "Disable ADC function!"
00108         NRF_ADC->TASKS_STOP         = 1;
00109         nrf_delay_us(5);
00110         NRF_ADC->CONFIG             = 0x18;
00111         nrf_delay_us(5);
00112         NRF_ADC->ENABLE             = 0;
00113         nrf_delay_us(5);
00114         NRF_ADC->POWER              = 0;
00115         nrf_delay_us(5);
00116     }
00117 }