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单片机源程序如下:
- #include"stm32f10x.h"
- #include"SysTick.h"
- #include"TFT_Drive.h"
- #include"GUI.h"
- #include"Uitr.h"
- #include"Time.h"
- void Count(void);
- void LED_GPIO_Config(void);
- uint32_t Distance;
- uint16_t Time;
- uint8_t ShowData[5]={0,0,0,0,0};
- int main(void)
- {
- TFT_Init();
- Uitr_GPIO_Config();
- LED_GPIO_Config();
- GUI_ClearScreen(BLACK);
- GUI_WriteCHAR(60,55,"www点prechin点com",RED,BLACK);
- GUI_WriteCNChar(56,26,"普中科技",RED,BLACK);
- GUI_WriteCHAR(0,300,"Distance:",RED,BLACK);
- TIM4_Config();
- TIM3_Config();
- while(1)
- {
- while(ECHO_IN != 1);
- TIM_Cmd(TIM4,ENABLE); //计数器开始计数
- while(ECHO_IN == 1);
- TIM_Cmd(TIM4,DISABLE); //计数器停止计数
- Count(); //计算距离
- }
- }
- void Count(void)
- {
- Time = TIM4->CNT; //读计数器值
- TIM4->CNT = 0; //清除计数器
- if(Time>23530) //判断是否在4M范围，超出显示ERRO
- {
- GUI_WriteCHAR(72,300,"erro",RED,BLACK);
- }
- else
- {
- Distance = (uint32_t)(Time*340/2/1000) ; //计算出来的是MM
- ShowData[0] = (Distance%10000/1000)+'0';
- ShowData[1] = (Distance%1000/100)+'0';
- ShowData[2] = (Distance%100/10)+'0';
- ShowData[3] = (Distance%10/1)+'0';
- GUI_WriteCHAR(72,300,ShowData,RED,BLACK); //显示距离值
- }
-
- }
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