Read nRF51822(BLE Chip) VDD voltage and return 100 to 0% charging level
Dependents: BLE_Temp_Vdd_via_UART_TY BLE_EddystoneBeacon_w_ACC_TY51822 BLE_LoopbackUART_low_pwr_w_RTC1 BLE_Paired_Server ... more
This is only for nRF51822.
You don't need any hardware circuit. Just read internal Vdd voltage using ADC function inside of the chip.
Diff: nRF51_Vdd.cpp
- Revision:
- 3:faf2e448c15b
- Parent:
- 2:9b1e219a7695
--- a/nRF51_Vdd.cpp Sun May 29 00:54:11 2016 +0000 +++ b/nRF51_Vdd.cpp Sat Apr 14 04:55:32 2018 +0000 @@ -3,11 +3,11 @@ * Read nRF51822 VDD volatage and return 100 to 0% charging level * https://www.nordicsemi.com/eng/Products/Bluetooth-Smart-Bluetooth-low-energy/nRF51822 * - * Copyright (c) 2016 Kenji Arai / JH1PJL + * Copyright (c) 2016,'18 Kenji Arai / JH1PJL * http://www.page.sannet.ne.jp/kenjia/index.html - * http://mbed.org/users/kenjiArai/ + * https://os.mbed.com/users/kenjiArai/ * Created: January 23rd, 2016 - * Revised: May 29th, 2016 + * Revised: April 14th, 2018 * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE @@ -71,7 +71,7 @@ NRF_ADC->POWER = 0; nrf_delay_us(5); } - return ((float)wrk / 1024 * 1.2 * 3.0); + return ((float)wrk / 1024.0f * 1.2f * 3.0f); } uint8_t nRF51_Vdd::read(void){