vhdtdtfi -lib work LEDpwm.vhd -prj pwm -o ledpwm.spl -module ledpwm -template C:/Xilinx/13.1/ISE_DS/ISE//data/splfile.tft -deleteonerror 
spl2sym -intstyle ise -family spartan3a -w ledpwm.spl E:/Dropbox/UNIC_3A/pwm/ledpwm.sym