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Develop fpga #76

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Develop fpga #76

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Last update to check serial port communication of FPGA with BBB. Working instructions on last commit of 'develop_fpga' branch.

GUI sencilla para prueba de programa fpga
Se cambia el contador a 0 desde el inciio. Puede ser que arrancase en un numero aleatorio
send commands 'a','s' or 'l'
- 'a' - moves scissor mechanism up/down and servo
- 's' - moves scissor mechanism up/down and servo
- 'l' stop
Byte structure to send via serialport:
- /th bit : DIR ELEVATION
- 6th bit: EN ELEVATION
- not used - reserved to implement fast moving
- 4 to 0: cam angle
OnDataRecievedFromBBB slot arguments fixed
modifications on simulator interface to control FPGA and MD at the same time. Achieved mainly but there are problems with the hardware
- reprogrammed FPGA to initialize elevation mechanism disabled
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