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jingjie-li / ECGMonitor

A ECG/Oximeter Monitor design using TI's AFE4400 and ADS1293 IC, and MSP430MCU. Also we have an Android app to display waveform.
MIT License
46 stars 22 forks source link

MSP Androide Communicate Protocol #8

Open jingjie-li opened 6 years ago

jingjie-li commented 6 years ago

Android Send Command:

M - Normal Mode- Mobile receiving data (5-Lead ECG) N - Normal Mode(3-Lead ECG) F - AFE Only Mode - Turnoff ADS and only receive AFE PPG data. Encoding Formant not change, ADS data fills zero. A - ADS Only Mode (5-Leads) B - ADS Only Mode (3-Leads) T - Stop & Wait Mode

X - Select CH I Y - Select CH II Z - Select CH III

Abnormal Situation:

Receiving all 0 in ECG Data: Leads off Receiving all 0 in PPG Data: SPO2 Probe off Receiving all 1 in PPG Data: Fingers not in.

jingjie-li commented 6 years ago

P - PROCESSING MODE

TimothyZero commented 6 years ago

M ：start - Both (PPG + ECG) T ：stop F ：AFE only - PPG A ：ADS only - ECG X,Y,Z： select lead 3,5 ：3-lead 5-lead

jingjie-li commented 6 years ago

Defaultly, we are reading in channel 2, which is Y mode

jingjie-li commented 6 years ago

First testing on APP has been done by jl.

M mode Works well, lead selection and 3/5 lead switching functions are performing well.

The main problem I think is still the ECG waveform stability. In my opinion, only using FIFO to compute the baseline is not enough, what you might want to do, is to set a threshold when adding data into the FIFO, you can look at my processing code, there is a lot of functions like boolean isabnormal(int data)

So we'll ignore too large or small value when computing baseline, in that case, we even ignore R wave in ECG, maybe our baseline problem is due to that R wave.

The AFE only and ADS only mode works totally bad, the display is a huge mass. You might want to look at that carefully.