MATLAB: Анализ пиков
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- Автор: Super User
- Родительская категория: Заметки
- Категория: Программирование
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example: PPG -> FFT -> Peak detector -> bpm measure
% --Design Chebyshev Type II bandpass filter with a stopband attenuation of 40 dB Wp = [0.02 0.10]; % Stopband Frequency (Normalised) Ws = [0.015 0.2]; % Passband Frequency (Normalised) Rp = 0.5; % Passband Ripple (dB) Rs = 50; % Stopband Ripple (dB) [n,Ws] = cheb2ord(Wp,Ws,Rp,Rs); % Filter Order [A,B,C,D] = cheby2(n,40,[0.02 0.4]); [sos,g] = ss2sos(A,B,C,D); % Convert To Second-Order-Section For Stability PPG = filtfilt(sos, g, PPG); %-- filter by band-pass filter (noise and trend) %[p,s,mu] = polyfit((1:numel(PPG)),PPG,6); %f_y = polyval(p,(1:numel(PPG)),[],mu); %PPG = PPG - f_y; % Detrend data %--find peaks maxPPG = max(PPG); %-- find maximum minPPG = min(PPG); %-- find minimum thresholdPPG = 0.155; %-- setup threshold for peak detection Prominence = (maxPPG - minPPG)*thresholdPPG; [pks, locs] = findpeaks(PPG,'MinPeakProminence',Prominence); %-- peak detection TF_t = (fs/mean(diff(locs)))*60; %-- mean interval bpm
the frequency domain approach:
F=fft(PPG); Nfft=length(PPG); df=fs/Nfft; f=(0:(Nfft-1))*df; freqs=f(f<fs/2); ampSpec=abs(F(1:length(freqs))); [~,mxi] = max(ampSpec(2:length(freqs))); %filtrate zero freq and find number of max value (cutting subzero freq.) TF_f = freqs(mxi)*60; %-- bpm
LoraWAN with LoRa-E5 collection
- Информация о материале
- Автор: Super User
- Родительская категория: Заметки
- Категория: Программирование микроконтроллеров
- Просмотров: 1092
2
3
4. https://doc.riot-os.org/group__boards__lora-e5-dev.html
5. https://www.seeedstudio.com/blog/2021/10/21/invigorate-your-inspiration-for-iot-with-lora-e5-and-free-seeed-fusion-pcba-prototypes/?gclid=CjwKCAjw46CVBhB1EiwAgy6M4qZXE6N8lW2qnEXVLsIf2Bdsdr47nmkqiHogMtf8VgvbYg0beh9hEhoC7AgQAvD_BwE
6. https://www.seeedstudio.com/LoRa-E5-Wireless-Module-p-4745.html
7.
8.
9. https://github.com/bertrik/ttnhabbridge/issues/4 (MQTT at Helium and TTNv3)
10. https://learn.adafruit.com/the-things-network-for-feather/payload-decoding
11.https://npm.devtool.tech/@crapougnax/cayennelpp
VBA: finding description on another list of workbook and fill in current
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- Автор: Super User
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Sub AddDescription_Click()
Set CurrentWorkbook = Workbooks(ActiveWorkbook.Name)
Set REF_SHEET = CurrentWorkbook.Sheets("REF_SHEET")
Set CURRENT_SHEET = CurrentWorkbook.Sheets("CURRENT_SHEET")
CURRENT_SHEET.Select
Set Rng = Range(Cells(2, 2), Cells(55, 2))
For Each cell In Rng
If IsEmpty(cell.Value) = False Then
MNP = cell.Value
REF_SHEET.Select
Set Rng = Range(Cells(2, 2), Cells(38, 2))
For Each cell2 In Rng
If cell2.Value = MNP Then
cell.Offset(0, 2).Value = cell2.Offset(0, 2).Value
End If
Next cell2
End If
Next cell
STM32 HAL: таймер не стартует после программирования через CUBE
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- Автор: Super User
- Родительская категория: Заметки
- Категория: Программирование микроконтроллеров
- Просмотров: 1353
Всего пару вещей нужно добавить ( например, в main.c):
1. Определить коллбэк
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
if (htim == &htim16)
{
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_9);
}
}
2. Вызвать
// __HAL_TIM_ENABLE_IT(&htim16, TIM_IT_UPDATE);
HAL_TIM_Base_Start_IT(&htim16);
VBA - скрипт для MS Excel - ищем текст во всех файлах внутри папки
- Информация о материале
- Автор: Super User
- Родительская категория: Заметки
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- Просмотров: 1124
Attribute VB_Name = "search_in_files"
Public Sub SearchFolders()
Dim fso As Object
Dim fld As Object
Dim strSearch As String
Dim strPath As String
Dim strFile As String
Dim wOut As Worksheet
Dim wbk As Workbook
Dim wks As Worksheet
Dim lRow As Long
Dim rFound As Range
Dim strFirstAddress As String
On Error GoTo ErrHandler
Application.ScreenUpdating = False
'Change as desired
strPath = "C:\Components" 'write your folder path here
strSearch = InputBox("String to search:", "Search a string", "")
If strSearch = "" Then
Exit Sub
End If
Set wOut = Worksheets.Add
lRow = 1
With wOut
.Cells(lRow, 1) = "Workbook"
.Cells(lRow, 2) = "Worksheet"
.Cells(lRow, 3) = "Cell"
.Cells(lRow, 4) = "Text in Cell"
Set fso = CreateObject("Scripting.FileSystemObject")
Set fld = fso.GetFolder(strPath)
strFile = Dir(strPath & "\*.xls*")
Do While strFile <> ""
Set wbk = Workbooks.Open _
(Filename:=strPath & "\" & strFile, _
UpdateLinks:=0, _
ReadOnly:=True, _
AddToMRU:=False)
For Each wks In wbk.Worksheets
Set rFound = wks.UsedRange.Find(strSearch)
If Not rFound Is Nothing Then
strFirstAddress = rFound.Address
End If
Do
If rFound Is Nothing Then
Exit Do
Else
lRow = lRow + 1
.Cells(lRow, 1) = wbk.Name
.Cells(lRow, 2) = wks.Name
.Cells(lRow, 3) = rFound.Address
.Cells(lRow, 4) = rFound.Value
End If
Set rFound = wks.Cells.FindNext(After:=rFound)
Loop While strFirstAddress <> rFound.Address
Next
wbk.Close (False)
strFile = Dir
Loop
.Columns("A:D").EntireColumn.AutoFit
End With
MsgBox "Done"
ExitHandler:
Set wOut = Nothing
Set wks = Nothing
Set wbk = Nothing
Set fld = Nothing
Set fso = Nothing
Application.ScreenUpdating = True
Exit Sub
ErrHandler:
MsgBox Err.Description, vbExclamation
Resume ExitHandler
End Sub
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