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用 HI-TECH PICC 编译PIC16F77 出现的错误信息,请帮忙怎么解决? |
作者:shiaf 栏目:单片机 |
Error[000] D:\safworks\ONE_WIRE\main1.obj 242 : Fixup overflow in expression (loc 0xEAC (0xEA6+6), size 1, VALUE 0x120) Error[000] D:\safworks\ONE_WIRE\main1.obj 242 : Fixup overflow in expression (loc 0xEC4 (0xEA6+30), size 1, VALUE 0x140) 错误信息如上: bank1 unsigned CHAR page0[32]; // page0 缓冲区 bank1 unsigned CHAR page1[32]; // page1 缓冲区 bank2 unsigned CHAR page2[32]; // page2 缓冲区 bank2 unsigned CHAR page3[32]; // page3 缓冲区 // 读一个 page ,address = 地址 0-127 unsigned CHAR read_page(unsigned CHAR *buff,unsigned CHAR address); read_page(page0,0x00); read_page(page1,0x20); read_page(page2,0x40); read_page(page3,0x60); 最后 2 句去掉的话,编译通过。加上就出现一开始的错误,谁能帮我找找问题出在哪里?谢谢! |
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作者: martin 于 2005/11/21 11:43:00 发布:
PICC的指针 看两篇老帖子: http://bbs.21ic.com/club/bbs/list.asp?boardid=27&t=996876&tp=PICC%u7684%u6307%u9488 http://bbs.21ic.com/club/bbs/list.asp?boardid=27&t=1817945&tp=%u8C61%u662F%u5BF9%u6307%u9488%u53D8%u91CF%u8D4B%u503C%u65F6%u4E0D%u5339%u914D%u9519%u8BEF 再看一个例子: 我编译查看了一下,发现问题还是出在Pointer上。我查了你的程序,你的tx_buf位于BANK1,rx_buf都是位于BANK2。但是,pTXD和pTXDSend都是指向BANK2的,你的定义如下: extern bank2 unsigned CHAR *bank2 pTXD; extern bank2 unsigned CHAR *bank2 pTXDSend; extern bank2 unsigned CHAR *bank2 pRXD; extern bank1 unsigned CHAR tx_buf[50]; extern bank2 unsigned CHAR rx_buf[30]; 然后在你的编译报错的init.c文件中, void InitRam(void) { CommTimeOut = 0; CommFlag = 0; pTXD = tx_buf; //这两行有问题,tx_buf是位于BNAK1中,而pTXD和pTXDSend是指向BANK2的指针,这就发生了不匹配的错误 pTXDSend = tx_buf; // pRXD = rx_buf; utempLen.Len[0] = 0; utempLen.Len[1] = 0; } 在PICC的使用手册里对RAM指针有如下描述: 5.4.10.2 Midrange Pointers All pointers for the Midrange are the same as for the Baseline processors with the following exceptions: .. RAM Pointers Because an 8-bit pointer can ONLY access 256 bytes, RAM pointers can ONLY access objects in Bank 0 and Bank 1. .. Bank2 Pointers and Bank3 Pointers Supported Data Types and Variables These pointers are RAM pointers which are used to access Bank 2 and Bank 3 of RAM respectively. 因为指针是8位的,所以一个指针只能访问256个地址单元,而如果要访问BANK2或BANK3的RAM,就要使用bank2或bank3修饰的指针。现在我们定义的pTXD是bank2指针,那么它只能指向BANK2和BANK3这总共256个地址范围,不能让他指向BANK1的RAM的。 所以,尝试修改: 1,尝试把tx_buf也放到BANK2,编译结果出错,信息如下: Error[000] : Can't find 0x66 words for psect rbss_2 in segment BANK2 说明BANK2空间已经放不下了 2,尝试把tx_bug放到BANK3,修改如下: (isr.c)bank3 unsigned CHAR tx_buf[50]; (main.h)extern bank3 unsigned CHAR tx_buf[50]; 编译通过,如下: Total ROM used 2642 words (32.3%) Total RAM used 208 bytes (56.5%) Loaded C:\Myprog\customer\TYCO\222\HW15A.cof. BUILD SUCCEEDED: Wed Sep 14 13:31:07 2005 |
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作者: shiaf 于 2005/11/21 12:07:00 发布:
谢谢 martin ,承蒙指教,茅塞顿开呀。 多谢了! |
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