Data Packetize Module
(CH1 and CH2)
Data Acquisition
ADC data DRDY
Interrupt
USB
PC Application
SPI Interrupt
2 Channel Data
Reader
ADS1292R Configuration
Module
ADS1292R DATA FLOW DIAGRAM:
ECG and Respiration
Evaluation Mode
Decode PC
Commands
USB
SPI
Evaluation of ECG and Respiration Specific Functions
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Figure 36. Evaluation Mode Data Flow for ADS1292R
6.2
Live Data Streaming Mode
The Live ECG / Live Respiration data streaming can be started from the PC applicationLive ECG \ RESP
Display tab by clicking Start Data Streaming. The PC application will set the sampling rate to 500SPS
before requesting the firmware to start the live data streaming.
The firmware will instruct the converter to run in continuous conversion mode, monitoring the DRDY
interrupt for notification as to when new data is ready. Based on the interrupt, the firmware reads the data
from the ADC.
The firmware applies the following filters on the data read:
1. DC removal IIR filter
2. Multiband-pass FIR filter with 50/60 Hz notch (user selectable) or band-pass filter
The filtered signal is used for detecting the heart rate, respiration rate and deriving ECG leads. Filters are
applied only for live data streaming mode.
The system data flow diagram for live data stream mode is given in
Figure 37
.
32
ADS1x9xECG-FE Demonstration Kit
SLAU384A – December 2011 – Revised April 2012
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