SW4
SW2
SW3
SW1
Evaluation of ECG and Respiration Specific Functions
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Figure 34. Switch Positions
The function of each switch is defined in the following table:
Switch Number
Description
SW1
This switch is used to enable boot strap loader (BSL) MSP430 firmware.
SW2
Unused
SW3
This switch is used for hard reset of the board. The board will reset and start again with the firmware loaded.
SW4
Unused
5.9
Visual Indication
The demonstration kit has two LEDs to indicate various operating states. The flashing green LED (D2)
indicates the ADS1x9xECG-FE is in the idle state and steady blue LED (D1) indicates the micro-controller
is busy in servicing requests from the PC application.
6
Evaluation of ECG and Respiration Specific Functions
The micro-controller receives the two-channel data from ADC through the SPI interface to send to the PC.
The software is designed to handle the following activities:
•
Data acquisition
•
ADC Lead off detection
•
DC signal removal
•
Multi band pass filtering
•
ECG lead formation
•
QRS (HR) detection
•
RR Detection
•
USB communication
•
Firmware upgrade through USB
The high level architecture of the firmware implementation for the ADS1292R is given below:
30
ADS1x9xECG-FE Demonstration Kit
SLAU384A – December 2011 – Revised April 2012
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