Changes to firmware to add Heart Beat Module
The size of pulsing block can be changed by changing HB_length and
HB_width in hdl/misc/image_selector.vhd
Heart beat can be switched on/off using switch 0 or by sending "SH"
via CDC. To achieve this hdl/misc/controller.vhd and hdl/hdmi2usb.vhd
has been modified.
heart_beat.vhd add to .prj