Mark, I think you had a little (but important) typo
Should be
tcp_write(pcb, *&*data, 4, 1);
(pass pointer to data into tcp_write)
Ian
On 6/12/2012 8:37 AM, Mark Lakata wrote:
Read up on integers and how they are stored in memory http://en.wikipedia.org/wiki/EndiannessTry this int data = 0xFF; tcp_write(pcb, data, *4*, 1); // I changed the 1 to a 4 tcp_output(pcb); and see what you get in wireshark. You'll probably get00 FF xx xx (where xx is don't care garbage since you have a big endian 16-bit architecture)or 00 00 00 FF (since you have a 32 bit bit endian architecture) -Mark On 12/5/2012 6:38 AM, Firedog I. wrote:Hi everyone,I got a little problem over here. I can send simple TCP-Data like string and char, but I can't send data as integer type. I'm using lwIP v1.36 with RAW API.Example: /*Connection to Client established...*/ int data = 0xFF; //or int data = 255; tcp_write(pcb, data, 1, 1); tcp_output(pcb); When sending this Packet out, I receive a "00" as data in Wireshark.I've tried sending out the equal ASCII-char to 255, a "ΓΏ" (see extended ASCII), and this one works. When sending out this char, Wireshark shows a TCP-Packet with 1 byte length and a "ff" as data. That's exactly what I want, but I don't want to convert integer vars into extended ascii and then send the converted data out.Any suggestions how to solve the problem? Thanks. _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users_______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
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