HI there, i got a problem with the following code. Hope someone can help me..
The line "length = recvfrom(s, buffer, ETH_FRAME_LEN, 0, NULL, NULL)" seem to
slow down my program. Whenever the program is run, my button like pause and
update will not be very responsive. Is there a way i can solve the problem ? My
primary objective is to fetch new data whenever there is data sent over the
server.
I was thinking instead of keep looping the function and rerun the code to check
for new data, is there another way of doing it? so the line "length =
recvfrom(s, buffer, ETH_FRAME_LEN, 0, NULL, NULL)" wont have to run repeatedly
for every 1.0s.
int main()
{ //****coding of a window that include some buttons;***
//when button "chart" is press by user, a bar chart will be shown using
callback
//other buttons include pause, update etc...
}
//functions
Chart (Fl_Widget* , void*)
{
//I declared my buffer as global variables.
unsigned char dest_mac[6] = {0x32, 0x31, 0xA5, 0x5A, 0x31, 0x32};
unsigned char src_mac[6] = {0x32, 0x75, 0xA5, 0x5A, 0x31, 0x81};
s= socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
length = recvfrom(s, buffer, ETH_FRAME_LEN, 0, NULL, NULL);
Fl::repeat_timeout(0.5, callback1);
//every 0.5s , the function Chart will be recall. Looping the function every
0.5s.
//Each time it loop, it will fetch new data if there is data sent via the
server.
}
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