a knightrider example...
#!/usr/bin/python from ezusb import EZUSB ezusb=EZUSB(0x0547,0x2131) ezusb.downloadFW('iomap.hex') import time as time time.sleep(0.1) while 1: cValue=1 while cValue<256: time.sleep(0.5) ezusb.writeRAM(0x1b40,cValue) cValue=cValue<<1 cValue=128 while cValue>0: time.sleep(0.5) ezusb.writeRAM(0x1b40,cValue) cValue=cValue>>1