}
printf("distance:%f cm \r\n",temp*0.01954);
// delay_ms(60);
// flag4=1;
return temp*0.01954;
}[/mw_shl_code]
以下是串口打出来的数据
distance:45.919000 cm
distance:45.919000 cm
distance:44.981080 cm
distance:44.981080 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.023620 cm
distance:1.993080 cm
distance:1.993080 cm
distance:1.993080 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.981080 cm
distance:44.981080 cm
distance:44.981080 cm
distance:44.981080 cm
distance:42.753520 cm
distance:42.753520 cm
distance:45.469580 cm
distance:45.469580 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.981080 cm
distance:44.981080 cm
distance:86.718520 cm
distance:1.289640 cm
distance:1.289640 cm
distance:1.289640 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.981080 cm
distance:44.981080 cm
distance:44.961540 cm
distance:44.961540 cm
distance:36.090380 cm
distance:36.090380 cm
distance:44.981080 cm
distance:44.981080 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.961540 cm
distance:74.115220 cm
distance:0.742520 cm
distance:0.742520 cm
distance:0.742520 cm
distance:44.981080 cm
distance:44.981080 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.981080 cm
distance:29.310000 cm
distance:29.310000 cm
distance:29.310000 cm
distance:44.981080 cm
distance:44.981080 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.981080 cm
distance:44.981080 cm
distance:67.491160 cm
distance:0.488500 cm
distance:0.488500 cm
distance:0.488500 cm
distance:44.981080 cm
distance:44.981080 cm
distance:44.961540 cm
distance:44.961540 cm
distance:44.981080 cm
distance:22.568700 cm
distance:22.568700 cm
distance:22.568700 cm