减少了一些bug，推土机上下互换,微调了挖机

drivers/devicecontrol/car0103_control.c

@@ -8,14 +8,14 @@ void car0103_middle() {
 }
 
 void mode_car0103_lift_flont(unsigned char gval) {
-	int b=0;
+	int b=1;
    if (gval < 50) {
 		pwmWrite(PWM_PIN_SPEED, 75);
 	}
 	else if (gval <= 60) {
-		pwmWrite(PWM_PIN_SPEED, 79);
+		pwmWrite(PWM_PIN_SPEED, 79+b);
 	}else if (gval <= 70) {
-		pwmWrite(PWM_PIN_SPEED, 80);
+		pwmWrite(PWM_PIN_SPEED, 80+b);
 	}else if(gval >70){
 		int flont_speed = 80+(gval-70)/10+b;
 		pwmWrite(PWM_PIN_SPEED, flont_speed);
@@ -23,13 +23,13 @@ void mode_car0103_lift_flont(unsigned char gval) {
 }
 
 void mode_car0103_lift_back(unsigned char gval) {
-	int b=0;
+	int b=1;
 	if (gval < 50) {
 		pwmWrite(PWM_PIN_SPEED, 75);
 	} else if (gval <= 60) {
-		pwmWrite(PWM_PIN_SPEED, 71);
+		pwmWrite(PWM_PIN_SPEED, 71-b);
 	}else if (gval <= 70) {
-		pwmWrite(PWM_PIN_SPEED, 70);
+		pwmWrite(PWM_PIN_SPEED, 70-b);
 	} else if(gval >70){
 		int back_speed = 70 - (gval-70)/10-b;
 		pwmWrite(PWM_PIN_SPEED, back_speed);