STM32怎么驱动超声波测距模块HC-SR04，并在OLED屏幕显示的代码的程序代码

以下是使用STM32驱动超声波测距模块HC-SR04，并在OLED屏幕显示的代码的程序代码：

#include "stm32f10x.h" 
#include "oled.h" 

#define TRIG GPIO_Pin_8  
#define ECHO GPIO_Pin_9 
#define TIM TIM2 

vu8 SYS_CLK=72; 
vu16 Time=0; 
vu16 Dis=0; 

void TIM2_Init(u16 period,u16 prescaler) 
{ 
 TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure; 
 NVIC_InitTypeDef NVIC_InitStructure; 

 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); 

 TIM_TimeBaseStructure.TIM_Period =period; 
 TIM_TimeBaseStructure.TIM_Prescaler = prescaler; 
 TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1; 
 TIM_TimeBaseStructure.TIM_CounterMode =TIM_CounterMode_Up; 

 TIM_TimeBaseInit(TIM,&TIM_TimeBaseStructure); 

 TIM_ITConfig(TIM,TIM_IT_Update,ENABLE); 

 NVIC_InitStructure.NVIC_IRQChannel=TIM2_IRQn; 
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2; 
 NVIC_InitStructure.NVIC_IRQChannelSubPriority=0; 
 NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; 
 NVIC_Init(&NVIC_InitStructure); 
} 

void TIM2_IRQHandler(void) 
{ 
 if(TIM_GetITStatus(TIM,TIM_IT_Update)) 
 {   
  if(Time>0) Time--; 
  TIM_ClearITPendingBit(TIM,TIM_FLAG_Update); 
 }   
} 

void init_HC_SR04(void) 
{ 
 GPIO_InitTypeDef GPIO_InitStructure; 

 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE,ENABLE); 

 GPIO_InitStructure.GPIO_Pin=TRIG; 
 GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP; 
 GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; 
 GPIO_Init(GPIOE,&GPIO_InitStructure); 

 GPIO_InitStructure.GPIO_Pin=ECHO; 
 GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU; 
 GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; 
 GPIO_Init(GPIOE,&GPIO_InitStructure); 

 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); 
 TIM_Cmd(TIM,ENABLE); 
} 

void Trig_HC_SR04(void) 
{ 
 GPIO_SetBits(GPIOE,TRIG); 
 delay_us(15); 
 GPIO_ResetBits(GPIOE,TRIG); 
} 

u16 GetEchoTime_HC_SR04(void) 
{ 
 u16 echo_time=0; 
 while(GPIO_ReadInputDataBit(GPIOE,ECHO)==RESET); 

 while(GPIO_ReadInputDataBit(GPIOE,ECHO)==SET) 
 { 
  Time=65000;   
  echo_time++; 
  delay_us(10); 
  if(Time==0)break; 
 } 

 return echo_time; 
} 

u16 GetDis_HC_SR04(void) 
{ 
 u16 dis_num=0; 
 Trig_HC_SR04(); 
 dis_num=GetEchoTime_HC_SR04(); 
 return(dis_num * 0.017); 
} 

int main(void) 
{ 
 SystemInit();    
 if(SysTick_Config(SystemCoreClock/1000))while(1); 

 init_HC_SR04(); 
 OLED_Init(); 
 OLED_Clear(); 

 OLED_ShowString(0,0,"Super-Sonic"); 
 OLED_ShowString(0,2,"Distance test:"); 
 OLED_ShowString(0,4,"----------------"); 
 OLED_ShowString(0,6,"Author:EMANOK"); 

 while(1) 
 { 
  Delay(50);  
  Dis=GetDis_HC_SR04(); 
  OLED_ShowNum(0, 5, Dis, 3, 16); 
  OLED_ShowString(36, 5, "cm ");
 } 
}

希望这些代码能对你有所帮助！