problem on ATMega 16 + 16 Mhz Crystal + CS8900
hi all..... i have a little project that using atmega16. i want to connect my device to LAN by using crystal cs8900 chip. i used crystal 16 MHz to as clock source fo uC .. for this i set l fuse to 0xef an hfuse to 0x89 (CKOPT programmed) and i use 20 Mhz of crystal for the cs8900 i connect the cs8900 to atmega16 by these: - data port -- port A - address port -- port C - IOW/IOR -- pin B 0/1 - reset -- pin B 2 i use avrlib as the library and use net library.. the problem is.... my ethernet seem work on initialization... i can connect it to my computer with cross over UTP cable... but i cant ping my device.. on the main progam i just create a loop to run netstack service (netstackService()). i think it suppose be able to respond ping request. because in netsack service also include ICMP service. i have made some debugging i found that packet size that it retrieve from the net alway 65535 byte. (max value of short variable type) thats way my device alway drop the packet.... i dont understand why this is happened... i hope u can help me on this.... thankyou..
hi all..... i have a little project that using atmega16. i want to connect my device to LAN by using crystal cs8900 chip. i used crystal 16 MHz to as clock source fo uC .. for this i set l fuse to 0xef an hfuse to 0x89 (CKOPT programmed) and i use 20 Mhz of crystal for the cs8900 i connect the cs8900 to atmega16 by these: - data port -- port A - address port -- port C - IOW/IOR -- pin B 0/1 - reset -- pin B 2 i use avrlib as the library and use net library.. the problem is.... my ethernet seem work on initialization... i can connect it to my computer with cross over UTP cable... but i cant ping my device.. on the main progam i just create a loop to run netstack service (netstackService()). i think it suppose be able to respond ping request. because in netsack service also include ICMP service. i have made some debugging i found that packet size that it retrieve from the net alway 65535 byte. (max value of short variable type) thats way my device alway drop the packet.... i dont understand why this is happened... i hope u can help me on this.... thankyou..