官方给的例子报错是咋回事呢？STC89-90xx Series MCU IO Demo

duro*** · 发表于 2024-4-27 11:48:35

//
//由于P0口为开漏模式,所以需要外接10K左右的上拉电阻才可以正常测试
//对于STC90C5xAD/STC9LEC5xAD系列,P4口的地址为 0C0H
//
//P4.5默认为ALE引脚,需要使用ISP下载软件将它编程为P4.5口才可正常测试
//

#include "reg51.h"

sbit P00 = P0^0;
sbit P01 = P0^1;
sbit P02 = P0^2;
sbit P03 = P0^3;
sbit P04 = P0^4;
sbit P05 = P0^5;
sbit P06 = P0^6;
sbit P07 = P0^7;
sbit P10 = P1^0;
sbit P11 = P1^1;
sbit P12 = P1^2;
sbit P13 = P1^3;
sbit P14 = P1^4;
sbit P15 = P1^5;
sbit P16 = P1^6;
sbit P17 = P1^7;
sbit P20 = P2^0;
sbit P21 = P2^1;
sbit P22 = P2^2;
sbit P23 = P2^3;
sbit P24 = P2^4;
sbit P25 = P2^5;
sbit P26 = P2^6;
sbit P27 = P2^7;
sbit P30 = P3^0;
sbit P31 = P3^1;
sbit P32 = P3^2;
sbit P33 = P3^3;
sbit P34 = P3^4;
sbit P35 = P3^5;
sbit P36 = P3^6;
sbit P37 = P3^7;

sfr P4 = 0xC0;
sbit P40 = P4^0;
sbit P41 = P4^1;
sbit P42 = P4^2;
sbit P43 = P4^3;

//sfr P4 = 0xc0;       //STC90C5xAD/STC9LEC5xAD系列

void delay()
{
int i, j;

for (i=0; i<1000; i++)
for (j=0; j<500; j++);
}

void main()
{
P10 = 0;
delay();
P10 = 1;
P11 = 0;
delay();
P11 = 1;
P12 = 0;
delay();
P12 = 1;
P13 = 0;
delay();
P13 = 1;
P14 = 0;
delay();
P14 = 1;
P15 = 0;
delay();
P15 = 1;
P16 = 0;
delay();
P16 = 1;
P17 = 0;
delay();
P17 = 1;

P30 = 0;
delay();
P30 = 1;
P31 = 0;
delay();
P31 = 1;
P32 = 0;
delay();
P32 = 1;
P33 = 0;
delay();
P33 = 1;
P34 = 0;
delay();
P34 = 1;
P35 = 0;
delay();
P35 = 1;
P36 = 0;
delay();
P36 = 1;
P37 = 0;
delay();
P37 = 1;

P20 = 0;
delay();
P20 = 1;
P21 = 0;
delay();
P21 = 1;
P22 = 0;
delay();
P22 = 1;
P23 = 0;
delay();
P23 = 1;
P24 = 0;
delay();
P24 = 1;
P25 = 0;
delay();
P25 = 1;
P26 = 0;
delay();
P26 = 1;
P27 = 0;
delay();
P27 = 1;

P00 = 0;
delay();
P00 = 1;
P01 = 0;
delay();
P01 = 1;
P02 = 0;
delay();
P02 = 1;
P03 = 0;
delay();
P03 = 1;
P04 = 0;
delay();
P04 = 1;
P05 = 0;
delay();
P05 = 1;
P06 = 0;
delay();
P06 = 1;
P07 = 0;
delay();
P07 = 1;

P40 = 0;
delay();
P40 = 1;
P41 = 0;
delay();
P41 = 1;
P42 = 0;
delay();
P42 = 1;
P43 = 0;
delay();
P43 = 1;

while (1)
{
      P1 = 0x00;
      delay();
      P1 = 0xff;

      P3 = 0x00;
      delay();
      P3 = 0xff;

      P2 = 0x00;
      delay();
      P2 = 0xff;

      P0 = 0x00;
      delay();
      P0 = 0xff;

      P4 = 0x00;
      delay();
      P4 = 0xff;
}
}
--------------------------------------------------------------------------
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C_START
MODULE:  STARTUP.obj (?C_STARTUP)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C_START
MODULE:  STARTUP.obj (?C_STARTUP)
ADDRESS: 0155H
Program Size: data=9.0 xdata=0 code=343
---------------------------------------------
为什么官方给的例子会报警告呢？

乘风*** · 发表于 2024-4-27 11:58:05

项目里面是不是有“STARTUP.A51”文件？有的话删掉试试。

duro*** · 发表于 2024-4-27 12:13:48

乘风飞扬发表于 2024-4-27 11:58
项目里面是不是有“STARTUP.A51”文件？有的话删掉试试。

删掉了，也清除缓存了。重新编译还是报
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: ?C_STARTUP
MODULE: rda.obj (RDA)
Program Size: data=8.0 xdata=0 code=328

之前总共两个警告，删除后L2警告没有了，但是L1还是有，是不是和什么选项有关呢？

乘风*** · 发表于 2024-4-27 12:17:41

durongze 发表于 2024-4-27 12:13
删掉了，也清除缓存了。重新编译还是报
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL

能否将你的项目打包发出来？

duro*** · 发表于 2024-4-27 12:25:59

这个是我的工程，帮我看下，谢谢

duro*** · 发表于 2024-4-27 12:29:56

乘风飞扬发表于 2024-4-27 12:17
能否将你的项目打包发出来？

compiling my_test.c...
assembling my_test.src...
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: ?C_STARTUP
MODULE: my_test.obj (MY_TEST)
Program Size: data=8.0 xdata=0 code=328
creating hex file from "my_test"...
"my_test" - 0 Error(s), 1 Warning(s).

duro*** · 发表于 2024-4-27 12:31:46

C51 COMPILER V9.01 MY_TEST                                                             04/27/2024 12:27:20 PAGE 1

C51 COMPILER V9.01, COMPILATION OF MODULE MY_TEST
NO OBJECT MODULE REQUESTED
COMPILER INVOKED BY: F:\program\KeilC51\C51\BIN\C51.EXE my_test.c BROWSE DEBUG OBJECTEXTEND SRC(.\my_test.SRC)

line level source

1       /*------------------------------------------------------------------*/
2       /* --- STC MCU Limited ---------------------------------------------*/
3       /* --- STC89-90xx Series MCU IO Demo -------------------------------*/
4       /* --- Mobile: (86)13922805190 -------------------------------------*/
5       /* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/
6       /* --- Tel: 86-0513-55012928,55012929,55012966----------------------*/
7       /* --- Web: www.STCMCU.com -----------------------------------------*/
8       /* --- Web: www.GXWMCU.com -----------------------------------------*/
9       /* If you want to use the program or the program referenced in the  */
  10       /* article, please specify in which data and procedures from STC */
  11       /*------------------------------------------------------------------*/
  12
  13       //
  14       //由于P0口为开漏模式,所以需要外接10K左右的上拉电阻才可以正常测试
  15       //对于STC90C5xAD/STC9LEC5xAD系列,P4口的地址为 0C0H
  16       //
  17       //P4.5默认为ALE引脚,需要使用ISP下载软件将它编程为P4.5口才可正常测试
  18       //
  19
  20       #include "reg51.h"
  21
  22       sbit P00 = P0^0;
  23       sbit P01 = P0^1;
  24       sbit P02 = P0^2;
  25       sbit P03 = P0^3;
  26       sbit P04 = P0^4;
  27       sbit P05 = P0^5;
  28       sbit P06 = P0^6;
  29       sbit P07 = P0^7;
  30       sbit P10 = P1^0;
  31       sbit P11 = P1^1;
  32       sbit P12 = P1^2;
  33       sbit P13 = P1^3;
  34       sbit P14 = P1^4;
  35       sbit P15 = P1^5;
  36       sbit P16 = P1^6;
  37       sbit P17 = P1^7;
  38       sbit P20 = P2^0;
  39       sbit P21 = P2^1;
  40       sbit P22 = P2^2;
  41       sbit P23 = P2^3;
  42       sbit P24 = P2^4;
  43       sbit P25 = P2^5;
  44       sbit P26 = P2^6;
  45       sbit P27 = P2^7;
  46       sbit P30 = P3^0;
  47       sbit P31 = P3^1;
  48       sbit P32 = P3^2;
  49       sbit P33 = P3^3;
  50       sbit P34 = P3^4;
  51       sbit P35 = P3^5;
  52       sbit P36 = P3^6;
  53       sbit P37 = P3^7;
  54
  55       sfr P4 = 0xC0;
C51 COMPILER V9.01 MY_TEST                                                             04/27/2024 12:27:20 PAGE 2

  56       sbit P40 = P4^0;
  57       sbit P41 = P4^1;
  58       sbit P42 = P4^2;
  59       sbit P43 = P4^3;
  60
  61
  62       //sfr P4 = 0xc0;       //STC90C5xAD/STC9LEC5xAD系列
  63
  64       void delay()
  65       {
  66 1       int i, j;
  67 1
  68 1       for (i=0; i<1000; i++)
  69 1       for (j=0; j<500; j++);
  70 1    }
  71
  72
  73       void main()
  74       {
  75 1       P10 = 0;
  76 1       delay();
  77 1       P10 = 1;
  78 1       P11 = 0;
  79 1       delay();
  80 1       P11 = 1;
  81 1       P12 = 0;
  82 1       delay();
  83 1       P12 = 1;
  84 1       P13 = 0;
  85 1       delay();
  86 1       P13 = 1;
  87 1       P14 = 0;
  88 1       delay();
  89 1       P14 = 1;
  90 1       P15 = 0;
  91 1       delay();
  92 1       P15 = 1;
  93 1       P16 = 0;
  94 1       delay();
  95 1       P16 = 1;
  96 1       P17 = 0;
  97 1       delay();
  98 1       P17 = 1;
  99 1
100 1       P30 = 0;
101 1       delay();
102 1       P30 = 1;
103 1       P31 = 0;
104 1       delay();
105 1       P31 = 1;
106 1       P32 = 0;
107 1       delay();
108 1       P32 = 1;
109 1       P33 = 0;
110 1       delay();
111 1       P33 = 1;
112 1       P34 = 0;
113 1       delay();
114 1       P34 = 1;
115 1       P35 = 0;
116 1       delay();
117 1       P35 = 1;
C51 COMPILER V9.01 MY_TEST                                                             04/27/2024 12:27:20 PAGE 3

118 1       P36 = 0;
119 1       delay();
120 1       P36 = 1;
121 1       P37 = 0;
122 1       delay();
123 1       P37 = 1;
124 1
125 1       P20 = 0;
126 1       delay();
127 1       P20 = 1;
128 1       P21 = 0;
129 1       delay();
130 1       P21 = 1;
131 1       P22 = 0;
132 1       delay();
133 1       P22 = 1;
134 1       P23 = 0;
135 1       delay();
136 1       P23 = 1;
137 1       P24 = 0;
138 1       delay();
139 1       P24 = 1;
140 1       P25 = 0;
141 1       delay();
142 1       P25 = 1;
143 1       P26 = 0;
144 1       delay();
145 1       P26 = 1;
146 1       P27 = 0;
147 1       delay();
148 1       P27 = 1;
149 1
150 1       P00 = 0;
151 1       delay();
152 1       P00 = 1;
153 1       P01 = 0;
154 1       delay();
155 1       P01 = 1;
156 1       P02 = 0;
157 1       delay();
158 1       P02 = 1;
159 1       P03 = 0;
160 1       delay();
161 1       P03 = 1;
162 1       P04 = 0;
163 1       delay();
164 1       P04 = 1;
165 1       P05 = 0;
166 1       delay();
167 1       P05 = 1;
168 1       P06 = 0;
169 1       delay();
170 1       P06 = 1;
171 1       P07 = 0;
172 1       delay();
173 1       P07 = 1;
174 1
175 1       P40 = 0;
176 1       delay();
177 1       P40 = 1;
178 1       P41 = 0;
179 1       delay();
C51 COMPILER V9.01 MY_TEST                                                             04/27/2024 12:27:20 PAGE 4

180 1       P41 = 1;
181 1       P42 = 0;
182 1       delay();
183 1       P42 = 1;
184 1       P43 = 0;
185 1       delay();
186 1       P43 = 1;
187 1
188 1       while (1)
189 1       {
190 2             P1 = 0x00;
191 2             delay();
192 2             P1 = 0xff;
193 2
194 2             P3 = 0x00;
195 2             delay();
196 2             P3 = 0xff;
197 2
198 2             P2 = 0x00;
199 2             delay();
200 2             P2 = 0xff;
201 2
202 2             P0 = 0x00;
203 2             delay();
204 2             P0 = 0xff;
205 2
206 2             P4 = 0x00;
207 2             delay();
208 2             P4 = 0xff;
209 2       }
210 1    }
211

MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE       = 328 ----
CONSTANT SIZE = ---- ----
XDATA SIZE    = ---- ----
PDATA SIZE    = ---- ----
DATA SIZE       = ---- ----
IDATA SIZE    = ---- ----
BIT SIZE       = ---- ----
END OF MODULE INFORMATION.

C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)
-------------------------------------------------------
好奇怪啊，软件界面有警告提示，链接日志里好像又没有。。。。

so*** · 发表于 2024-4-27 12:37:24

警告没事程序能正常运行就没问题

乘风*** · 发表于 2024-4-27 12:38:19

my_test.c文件右键选择“Options for file...”
截图202404271236375255.jpg

点击选择框，让这两个选项变灰就可以：
截图202404271238162538.jpg

duro*** · 发表于 2024-4-27 12:39:04

soma 发表于 2024-4-27 12:37
警告没事程序能正常运行就没问题

最可怕的是潜在问题啊，

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