Hello all,

I have a problem with definition of variables in Keil that causes an unspecified error during data processing in a part of my code that doesn't relate to these variables... I am not able to localize the place where the problem occurs as the code is very large and there is no on-chip debugging. After many experiments, I have found how to avoid the problem - it is only a small nuance, see below. Now I am not sure if it is my or compiler fault.

I have Keil uVision3 v3.51 (C Compiler v8.08) and Atmel AT89C51ED2.

This definition causes the error:

typedef struct { 
    BYTE ip_addr[4];
} IP_ADDR;

IP_ADDR broadcast_IP = {255,255,255,255};
IP_ADDR zero_ip = {0, 0, 0, 0};
IP_ADDR ip_addrr;

 

This definition doesn't cause the error:

typedef struct { 
    BYTE ip_addr[4];
} IP_ADDR;

IP_ADDR ip_addrr;
IP_ADDR broadcast_IP = {255,255,255,255};
IP_ADDR zero_ip = {0, 0, 0, 0};

 

This definition doesn't cause the error:

typedef struct { 
    BYTE ip_addr[4];
} IP_ADDR;

IP_ADDR code broadcast_IP = {255,255,255,255};
IP_ADDR code zero_ip = {0, 0, 0, 0};
IP_ADDR ip_addrr;

 

This definition doesn't cause the error:

typedef struct { 
    BYTE ip_addr[4];
} IP_ADDR;

IP_ADDR data broadcast_IP = {255,255,255,255};
IP_ADDR data code zero_ip = {0, 0, 0, 0};
IP_ADDR data ip_addrr;

 

Thank you very much for your opinion...