main.c(24): error: #20: identifier "TIM_TimeBaseInitTypeDef" is undefined TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; main.c(29): error: #20: identifier "TIM_CounterMode_Up" is undefined TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; main.c(31): error: #20: identifier "TIM_CKD_DIV1" is undefined TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; main.c(32): warning: #223-D: function "TIM_TimeBaseInit" declared implicitly TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); main.c(34): warning: #223-D: function "TIM_Cmd" declared implicitly TIM_Cmd(TIM2, ENABLE); main.c(62): warning: #550-D: variable "distance" was set but never used改正
时间: 2024-02-28 15:54:27 浏览: 698
这段代码中出现了一些错误和警告,可以通过以下方法进行改正:
1. 在代码开头添加头文件 `#include "stm32f10x_tim.h"`,以解决 `TIM_TimeBaseInitTypeDef`、`TIM_CounterMode_Up` 和 `TIM_CKD_DIV1` 的未定义错误。
2. 在第 32 行代码中,将 `TIM_CKD_DIV1` 改为 `TIM_CLOCKDIVISION_DIV1`。
3. 在第 62 行代码中,可以删除未使用的变量 `distance`。
4. 在第 32 行和第 34 行代码中,可以添加函数声明 `void TIM_TimeBaseInit(TIM_TypeDef *TIMx, TIM_TimeBaseInitTypeDef *TIM_TimeBaseInitStruct);` 和 `void TIM_Cmd(TIM_TypeDef* TIMx, FunctionalState NewState);`,以避免隐式声明的警告。
修改后的代码如下:
```
#include "stm32f10x_tim.h"
int main(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_COUNTERMODE_UP;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CLOCKDIVISION_DIV1;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_Cmd(TIM2, ENABLE);
// other code...
return 0;
}
```
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