Robert Pope / Mbed 2 deprecated simpleWatch

Attempting to create an open source, very simple (basically bluetooth notification light to start) smartwatch around the nRF51822.

Dependencies:   BLE_API mbed nRF51822

The main branch of code for the simpleWatch project

battery.h@0:3e9f9b3ed7c8, 2016-05-11 (annotated)

Committer:
rjpope42
Date:
Wed May 11 18:29:00 2016 +0000
Revision:
0:3e9f9b3ed7c8
Committing a PWM attempt as version 1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rjpope42 0:3e9f9b3ed7c8 1
rjpope42 0:3e9f9b3ed7c8 2
rjpope42 0:3e9f9b3ed7c8 3 #ifndef __BATTERY_H__
rjpope42 0:3e9f9b3ed7c8 4 #define __BATTERY_H__
rjpope42 0:3e9f9b3ed7c8 5
rjpope42 0:3e9f9b3ed7c8 6 #include "mbed.h"
rjpope42 0:3e9f9b3ed7c8 7
rjpope42 0:3e9f9b3ed7c8 8 class Battery {
rjpope42 0:3e9f9b3ed7c8 9 public:
rjpope42 0:3e9f9b3ed7c8 10 Battery(PinName pin) {
rjpope42 0:3e9f9b3ed7c8 11 uint32_t n = (uint32_t) pin;
rjpope42 0:3e9f9b3ed7c8 12 channel = 1 << (1 + n);
rjpope42 0:3e9f9b3ed7c8 13 }
rjpope42 0:3e9f9b3ed7c8 14
rjpope42 0:3e9f9b3ed7c8 15 float read() {
rjpope42 0:3e9f9b3ed7c8 16 uint32_t pre_enable_register = NRF_ADC->ENABLE;
rjpope42 0:3e9f9b3ed7c8 17 uint32_t pre_config_register = NRF_ADC->CONFIG;
rjpope42 0:3e9f9b3ed7c8 18
rjpope42 0:3e9f9b3ed7c8 19
rjpope42 0:3e9f9b3ed7c8 20 NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Enabled;
rjpope42 0:3e9f9b3ed7c8 21 NRF_ADC->CONFIG = (ADC_CONFIG_RES_10bit << ADC_CONFIG_RES_Pos) |
rjpope42 0:3e9f9b3ed7c8 22 (ADC_CONFIG_INPSEL_AnalogInputNoPrescaling << ADC_CONFIG_INPSEL_Pos) |
rjpope42 0:3e9f9b3ed7c8 23 (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) |
rjpope42 0:3e9f9b3ed7c8 24 (channel << ADC_CONFIG_PSEL_Pos) |
rjpope42 0:3e9f9b3ed7c8 25 (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos);
rjpope42 0:3e9f9b3ed7c8 26
rjpope42 0:3e9f9b3ed7c8 27 NRF_ADC->TASKS_START = 1;
rjpope42 0:3e9f9b3ed7c8 28 while (((NRF_ADC->BUSY & ADC_BUSY_BUSY_Msk) >> ADC_BUSY_BUSY_Pos) == ADC_BUSY_BUSY_Busy) {
rjpope42 0:3e9f9b3ed7c8 29 }
rjpope42 0:3e9f9b3ed7c8 30
rjpope42 0:3e9f9b3ed7c8 31 uint16_t value = NRF_ADC->RESULT;
rjpope42 0:3e9f9b3ed7c8 32
rjpope42 0:3e9f9b3ed7c8 33 NRF_ADC->ENABLE = pre_enable_register;
rjpope42 0:3e9f9b3ed7c8 34 NRF_ADC->CONFIG = pre_config_register;
rjpope42 0:3e9f9b3ed7c8 35
rjpope42 0:3e9f9b3ed7c8 36 return (float)value * (1.0f / (float)0x3FF) * 1.2 * 12.2 / 2.2;
rjpope42 0:3e9f9b3ed7c8 37 }
rjpope42 0:3e9f9b3ed7c8 38
rjpope42 0:3e9f9b3ed7c8 39 private:
rjpope42 0:3e9f9b3ed7c8 40 uint32_t channel;
rjpope42 0:3e9f9b3ed7c8 41 };
rjpope42 0:3e9f9b3ed7c8 42
rjpope42 0:3e9f9b3ed7c8 43 #endif // __BATTERY_H__