不知怎么解决了 第一次遇到这个

whygrasp

main.c(35): warning:  #174-D: expression has no effect，不知怎么解决，意思知道

jermy_z

因为你函数里没有用到这些值吧

FantaSy_

打开你的函数看下你的函数变量的类型~~

whygrasp

回复【2楼】jermy_z:
---------------------------------
int f_getcapture(char DJ_n_k)
{
int DJ_capture_temp;
switch(  DJ_n_k)
{
case 0x1: DJ_capture_temp = TIM_GetCapture1(TIM2);      //?¨?±?÷2?¨??1????
break;

case 0x2: DJ_capture_temp = TIM_GetCapture2(TIM2);
break;

case 0x3: DJ_capture_temp = TIM_GetCapture3(TIM2);
break;

case 0x4: DJ_capture_temp = TIM_GetCapture4(TIM2);
break;

case 0x5: DJ_capture_temp = TIM_GetCapture1(TIM3);
break;

case 0x6: DJ_capture_temp = TIM_GetCapture2(TIM3);
break;

case 0x7: DJ_capture_temp = TIM_GetCapture3(TIM3);
break;

case 0x8: DJ_capture_temp = TIM_GetCapture4(TIM3);
break;

case 0x9: DJ_capture_temp = TIM_GetCapture1(TIM4);
break;

case 0xA: DJ_capture_temp = TIM_GetCapture2(TIM4);
break;

case 0xB: DJ_capture_temp = TIM_GetCapture3(TIM4);
break;

defaultJ_capture_temp = TIM_GetCapture4(TIM4);
break;

}
return DJ_capture_temp;
}


函数里是这个

whygrasp

回复【3楼】FantaSy_:
---------------------------------
int f_getcapture(char DJ_n_k) 
{
int DJ_capture_temp;
switch(  DJ_n_k)
{
case 0x1: DJ_capture_temp = TIM_GetCapture1(TIM2);      //?¨?±?÷2?¨??1????
break;

case 0x2: DJ_capture_temp = TIM_GetCapture2(TIM2);
break;

case 0x3: DJ_capture_temp = TIM_GetCapture3(TIM2);
break;

case 0x4: DJ_capture_temp = TIM_GetCapture4(TIM2);
break;

case 0x5: DJ_capture_temp = TIM_GetCapture1(TIM3);
break;

case 0x6: DJ_capture_temp = TIM_GetCapture2(TIM3);
break;

case 0x7: DJ_capture_temp = TIM_GetCapture3(TIM3);
break;

case 0x8: DJ_capture_temp = TIM_GetCapture4(TIM3);
break;

case 0x9: DJ_capture_temp = TIM_GetCapture1(TIM4);
break;

case 0xA: DJ_capture_temp = TIM_GetCapture2(TIM4);
break;

case 0xB: DJ_capture_temp = TIM_GetCapture3(TIM4);
break;

defaultJ_capture_temp = TIM_GetCapture4(TIM4);
break;

}
return DJ_capture_temp;
}


函数里是这个

jermy_z

回复【3楼】FantaSy_:
---------------------------------
不知道他后来又发的什么。。。。

FantaSy_

回复【6楼】jermy_z:
---------------------------------
 嘻嘻。。。。

wjq

这个错误是你没有在主函数中调用，所以报无效的，

wjq

int f_getcapture(char DJ_n_k)；
这一句在主函数中调用