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i get the error "main() auto segment too large" for the given program which should be run on atmet 89c51 how to fix it thanks.........
#include <reg51.h> void Delay(); char serialsend(char []);
void main () { char z; char command1[]={"AT+CGATT=1\r"}; char command2[]={"AT+CSTT= \"ufone.pinternet\"\r" }; char command3[]={"AT+CIICR\r"}; char command4[]={"AT+CIFSR\r"}; char command5[]={"AT+CIPSTART=\"TCP\"\"121.52.147.94\"800\r"}; char command6[]={"AT+CIPSEND\r"}; char command7[]={"GPRS is Activated"}; char command8[]={"26"}; TMOD = 0x20; TH1 = 0xFD; SCON = 0x50; TR1 = 1; serialsend(command1); Delay(); serialsend(command2); Delay(); serialsend(command3); for(z=0; z<3; z++) { Delay(); } serialsend(command4); Delay(); serialsend(command5); for(z=0; z<10; z++) { Delay(); } serialsend(command6); for(z=0; z<5; z++) { Delay(); } serialsend(command7); serialsend(command8);
} char serialsend(char array[]) { int i=0; while(array[i] != '\0') { SBUF = array[i]; while(TI == 0); TI = 0; i++; } }
void Delay() { unsigned char x; for(x=0; x<40; x++) { TMOD=0x10; TL1=0xFE; TH1=0xA5; TR1=1; while (TF1==0); TR1=0; TF1=0; } }
Also besides the Timer1 mis-re-initialization in the above code the strings (array of chars) must be declared as code segment
code char command1[]={"AT+CGATT=1\r"};
so that these bytes be stored in code memory that is at leat 4K even for 89C51. by the current use compiler is trying to store them in DATA segment that is not enough.
If the system has 256bytes of IRAM then instead of code they could be stored to idata if this is convenient.
There is no need to change to "large model" for this particular reason.
Note that the strings - and any other initialisation data - have to be stored in Flash anyhow, whence they are copied to the runtime locations in RAM.
So, if the strings are not going to be modified, it is a complete waste of RAM to copy them there!
http://www.keil.com/support/man/docs/c51/c51_ap_init.htm