Fixed a busy/empty mistake in the status register
Added a sub ID for wb_spi
Debugged camera_utils.py
Fixed lingering bug in sdram_mask flag and added some PMOD specific examples
Added drivers for SPI and debugged the DMA Reader code
Settled on 'memory_device' instead of 'mem_device' for declaring a memory read
Added SPI testing capability in test_dionysus script
Camera viewer is working as a stand alone app