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Hello all, I am learn myself programming in C for MCUs. Especially for x51. At start i choose 2051. And i have problem. When i wrote a simple program and check USE ONCHIP MEMORY in project settings i get this errors while compiling *** ERROR L107: ADDRESS SPACE OVERFLOW SPACE: CODE SEGMENT: ?PR?MAIN?ZK1 LENGTH: 002FH *** ERROR L107: ADDRESS SPACE OVERFLOW SPACE: CODE SEGMENT: ?PR?MAIN?ZK1 LENGTH: 002FH *** ERROR L107: ADDRESS SPACE OVERFLOW SPACE: CODE SEGMENT: ?C_C51STARTUP LENGTH: 000CH *** ERROR L107: ADDRESS SPACE OVERFLOW SPACE: CODE SEGMENT: ?C_C51STARTUP LENGTH: 000CH *** ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT SYMBOL: MAIN SEGMENT: ?PR?MAIN?ZK1 *** ERROR L120: CONTENT BELONGS TO ERRONEOUS SEGMENT SEGMENT: ?PR?MAIN?ZK1 MODULE: zk1.obj (ZK1) *** ERROR L120: CONTENT BELONGS TO ERRONEOUS SEGMENT SEGMENT: ?C_C51STARTUP MODULE: D:\8051\KEIL-C\C51\LIB\C51S.LIB (?C_STARTUP) *** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL SYMBOL: ?C_START MODULE: D:\8051\KEIL-C\C51\LIB\C51S.LIB (?C_STARTUP) ADDRESS: 000AH
Here is the code of the program
#include <AT892051.h> void main(){ short i=0; while(1) { P1=255; while(i<255) { i++; } P1=0; i=0; while(i<255) { i++; } } }
What I do wrong?
"What I do wrong?"
You used the free evaluation version, and didn't read the list of limitations - especially with regard to processors like the 2051 with small on-chip code memory...
http://www.keil.com/demo/limits.asp
Oh yes, I must skip this section, when i read the limitations of demo. I solve this problem with sdcc and eclipse. I use keil for write program and test and then I compile it with sdcc in eclipse bc eclipse has no debuging.
Thanx for your help