FPGA code used to calibrate the Hexastorm. The code is very dated. It was used for the first Hexastorm. The code is not being maintained. I have decided to switch from MyHDL to Migen. The internal sram is used as ringbuffer. Data is uploaded via SPI. The code can be here here

The following folders in the project;

• midway_sdram-python2; rotating polygon, laser detects starts facet via photodiode and reads data from SDRAM. Data can be uploaded to the SDRAM with XSTOOL; which is provided by XESS.
• SDRAM-python3_nostep; same as above but python2 ported to python3

• blinknomemory ; blinks the onboard xula led
• DAC_ADC; probably doesnt work, a failed attempt to add a DAC_ADC converter
• diodecollection; also forgot what it does
• midway; pulses the laser in the middle of facet using the feedback of a photodiode
• stepper driver; rotates a stepper driver

It turned out that the Xula-LX25 was a great learning project but a hard board to build a machine around. In the end, I switched to the Beaglebone. The Beaglebone does, however, not have the potential to reach the speeds of an FPGA. A new project to build a FPGA controller is underway, first tests can be found here.