blob: 86250a57cecf3398c66ba344e82b62e281dd2223 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
#pragma once
#include <cstdint>
#include <drivers/include/nrfx_saadc.h>
#include <array>
#include <numeric>
namespace Pinetime {
namespace Controllers {
/** A simple circular buffer that can be used to average
out the sensor values. The total capacity of the CircBuffer
is given as the template parameter N.
*/
template <int N>
class CircBuffer {
public:
CircBuffer() : arr{}, sz{}, cap{N}, head{} {}
/**
insert member function overwrites the next data to the current
HEAD and moves the HEAD to the newly inserted value.
*/
void insert(const int num) {
head %= cap;
arr[head++] = num;
if (sz != cap) {
sz++;
}
}
int GetAverage() const {
int sum = std::accumulate(arr.begin(), arr.end(), 0);
return (sum / sz);
}
private:
std::array<int, N> arr; /**< internal array used to store the values*/
uint8_t sz; /**< The current size of the array.*/
uint8_t cap; /**< Total capacity of the CircBuffer.*/
uint8_t head; /**< The current head of the CircBuffer*/
};
class Battery {
public:
void Init();
void Update();
int PercentRemaining() const { return percentRemainingBuffer.GetAverage(); }
float Voltage() const { return voltage; }
bool IsCharging() const { return isCharging; }
bool IsPowerPresent() const { return isPowerPresent; }
private:
static constexpr uint32_t chargingPin = 12;
static constexpr uint32_t powerPresentPin = 19;
static constexpr nrf_saadc_input_t batteryVoltageAdcInput = NRF_SAADC_INPUT_AIN7;
static constexpr uint8_t percentRemainingSamples = 10;
static void SaadcEventHandler(nrfx_saadc_evt_t const * p_event);
CircBuffer<percentRemainingSamples> percentRemainingBuffer {};
float voltage = 0.0f;
bool isCharging = false;
bool isPowerPresent = false;
};
}
}
|
