II am working with 8270 Motorola processor which has QNX 6.0. I am using the Network driver code which I got from QNX BSP which we modified as per our board requirement. I want to use all 3 available FCC channels. I am facing the UNDERRUN error again and again on FCC channel. Overall this error comes for any FCC on different boards. But normally any one or two ports does not work. If any FCC works It works consistently. If it fails because of underrun It shows consistent failure. Ping works fine on any FCC. But if I try to Telnet it gives UNDERRUN. I think problem is when I try to send only one BD.
Please send your view how to prevent FCC for UNDERRUN
1) BD and data is on 60X bus SDRAM 2) I tried to put BD on DPRAM but result is same