当我使用HAL_UART_Transmit函数 发送大概 200个左右字节数据的时候，就会造成 MemManage_Handler中断，短小就没事，请问这个是什么问题，怎么解决啊

应该是哪里的小失误导致非法访问了。


如果数据是局部变量，部分将堆栈适当调大点；


再就是注意数据访问时别越界了，注意数组边界和指针的有效性；

你可以把代码贴出来，这种发送时阻塞式发送的，应该不会进MemManage_Handler中断的

strcpy((char )g_ucCatStrBuff,"{'i':'"); for(i=0;i<24;i++) { uiD = 1<<i; if((g_uiLedDrv&uiD)==0) { strcat((char )g_ucCatStrBuff,"2");
} else { strcat((char )g_ucCatStrBuff,"1");
} } ProFun_Reback_Fun("1"); strcpy((char )g_ucCatSendTBuff,cSendHead); strcat((char )g_ucCatSendTBuff,cSendTopic1);
strcat((char )g_ucCatSendTBuff,(char)g_ucCatStrBuff);
strcat((char )g_ucCatSendTBuff,cSendEnd);

// strcpy((char )g_ucCatSendTBuff,cSendHead);//-----------test Cat_Send_Str((char )g_ucCatSendTBuff);

把Cat_Send_Str((char *)g_ucCatSendTBuff);这句去掉就不会出现异常中断，把g_ucCatSendTBuff 长度变小 也不会

void Cat_Send_Str(char *pStr) { unsigned short int usLen; unsigned short int i;

usLen = strlen(pStr);

for(i=0;i<usLen;i++) { g_ucCatSendBuff[i] = ((unsigned char )pStr+i); } g_ucCatSendBuff[usLen] = 0x0D; g_ucCatSendBuff[usLen+1] = 0x0a;

Cat_Send_Data(g_ucCatSendBuff,usLen+2); }

void Cat_Send_Data(unsigned char *p, unsigned short int len) { unsigned int usLen;

usLen = len<<4; HAL_UART_Transmit(&huart1, p,len,usLen);

}

〃聪聪哥哥 发表于 2025-1-17 09:01
你可以把代码贴出来，这种发送时阻塞式发送的，应该不会进MemManage_Handler中断的
...

strcpy((char )g_ucCatSendTBuff,cSendHead); strcat((char )g_ucCatSendTBuff,cSendTopic1);
strcat((char )g_ucCatSendTBuff,(char)g_ucCatStrBuff);
strcat((char *)g_ucCatSendTBuff,cSendEnd);

// strcpy((char )g_ucCatSendTBuff,cSendHead);//-----------test Cat_Send_Str((char )g_ucCatSendTBuff);

把Cat_Send_Str这条语句去掉就不会进入异常中断， 而且把g_ucCatSendTBuff的长度变短也不会进入异常中断

/****

• @attention
• Copyright (c) 2023 STMicroelectronics.
• All rights reserved.
• This software is licensed under terms that can be found in the LICENSE file
• in the root directory of this software component.
• If no LICENSE file comes with this software, it is provided AS-IS.

**/ void Cat_Send_Str(char *pStr) { unsigned short int usLen; unsigned short int i;

usLen = strlen(pStr);

for(i=0;i<usLen;i++) { g_ucCatSendBuff[i] = ((unsigned char )pStr+i); } g_ucCatSendBuff[usLen] = 0x0D; g_ucCatSendBuff[usLen+1] = 0x0a;

Cat_Send_Data(g_ucCatSendBuff,usLen+2); }

//**** // shanghai gankun // www.sensorground.com //designed by hank //All rights reserved //ÐÞ¸ÄÈÕÆÚ:2014/5/2 //°æ±¾£ºV1.0 //**** void Cat_Send_Data(unsigned char *p, unsigned short int len) { unsigned int usLen;

usLen = len<<4; HAL_UART_Transmit(&huart1, p,len,usLen);

}

xmshao 发表于 2025-1-17 15:08
应该是哪里的小失误导致非法访问了。</p>
<p>

多谢！最开始我也怀疑是数据越界，但是我用 R13 看是从那里跳到 异常中断的，尽然是定时器中断，

我把栈堆放大试一下

xmshao 发表于 2025-1-17 15:08
应该是哪里的小失误导致非法访问了。</p>
<p>

我数据都是全局变量，而且进入HAL_UART_Transmit 函数单步走就没事，直接运行就不行，我单独做了一个测试程序，直接发送大批量数据也没问题，真不知道问题出在那里

strcpy((char )g_ucCatSendTBuff,"hello"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait");
strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char )g_ucCatSendTBuff,"waitwaitwait"); strcat((char )g_ucCatSendTBuff,"123456789");
strcat((char *)g_ucCatSendTBuff,"waitwaitwait");

// strcpy((char )g_ucCatSendTBuff,cSendHead);//-----------test
Cat_Send_Str((char )g_ucCatSendTBuff);

憨客鱼 发表于 2025-1-23 10:13
我数据都是全局变量，而且进入HAL_UART_Transmit 函数单步走就没事，直接运行就不行，我单独做了一个 ...

[md]修改栈堆大小也不行

xmshao 发表于 2025-1-17 15:08
应该是哪里的小失误导致非法访问了。</p>
<p>

是其他地方内存越界了，谢谢！