Hal4D13_SingleTransmitEP0 in ISP1362 chip [DE2-115]

Hello

I am confused between the usage of :

Chap9_BurstTransmitEP0() ,

Chap9_SingleTransmitEP0()

and

Hal4D13_SingleTransmitEP0 ()

In the chip device controller driver inculded within DE2_115_NIOS_DEVICE_LED demo