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Hello! Is fseek() fully supported on SDcard with RL-FLASH 4.12?
fp = fopen ("test.txt","ab"); printf("pos:%d\n",ftell(fp)); fseek(fp,4,SEEK_SET); printf("pos:%d\n",ftell(fp)); fprintf(fp,"ABCD"); fclose(fp); output: pos:12 pos:4 but it only appends ABCD to the end of the file.