當時做的開放性實驗，實驗板上插上超聲波探頭就能用，供大家參考
以下是主程序部分，大概思路就是這么著了
單片機源程序如下:
- #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[6]={0,0,0,0,0};
- int main(void)
- {
- TFT_Init();
- Uitr_GPIO_Config();
- LED_GPIO_Config();
- GUI_ClearScreen(BLACK);
- GUI_WriteCHAR(0,300,"Distance:",RED,BLACK);
- TIM4_Config();
- TIM3_Config();
- while(1)
- {
- while(ECHO_IN != 1);
- TIM_Cmd(TIM4,ENABLE); //計數器開始計數
- while(ECHO_IN == 1);
- TIM_Cmd(TIM4,DISABLE); //計數器停止計數
- Count(); //計算距離
- }
- }
- void Count(void)
- {
- Time = TIM4->CNT; //讀計數器值
- TIM4->CNT = 0; //清除計數器
- if(Time>23530) //判斷是否在4M范圍，超出顯示ERRO
- {
- GUI_WriteCHAR(72,300,"error ",RED,BLACK);
- }
- else
- {
- Distance = (uint32_t)((Time*1.7)/10) ; //計算出來的是MM
- ShowData[0] = (Distance%10000/1000)+'0';
- ShowData[1] = '.';
- ShowData[2] = (Distance%1000/100)+'0';
- ShowData[3] = (Distance%100/10)+'0';
- ShowData[4] = (Distance%10/1)+'0';
- ShowData[5] = 'm';
- GUI_WriteCHAR(72,300,ShowData,RED,BLACK); //顯示距離值
- }
-
- }
所有資料51hei提供下載:
STM32-超聲波測距.7z
(228.55 KB, 下載次數: 46)
2019-3-19 16:19 上傳
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