The Play back mode for HAR_IGN_WSDM uses data from the test set used for generating the neural network given as an example .
The test vector consists of 60s of data of human activity split into four sequences of 15 s stored in separate buffers :
Those buffers sequentially feed the input in loop mode of the neural network instead of live data from accelerometer sensor.
This mode of operation is selected through the definition of TEST_IGN_WSDM
I hope this helped
To be more specific , you need to uncomment #define TEST_IGN_WSDM , line 86-89 of SENSING1_config.h :
/* For HAR_IGN_WSDM play back mode (use test vectors instead of sensors) */ #ifdef NN_IGN_WSDM #define TEST_IGN_WSDM #endif /* NN_IGN_WSDM */