examples/speedControl: Replace poti by ramp.

Author: ederjc

examples/speedControl/speedControl.ino

@@ -4,8 +4,7 @@
  * \copyright   2021 Infineon Technologies AG
  * \brief       This example demonstrates how to control the speed of motor by using the PWM units of the TLE94112 shield
  * \details
- * Attaching a potentiometer on an analog input pin, which will than control the
- * setting of the TLE94112 internal PWM unit and therefore the speed of the motor.
+ * Ramping the speed of the motor up and down by using PWM signals.
  * The TLE94112 has three separate PWM units which can be attached to any combination
  * of halfbridges. So try out to change the TLE_PWM1 to TLE_PWM2 or TLE_PWM3 to see this.
  * You can change the motor direction by changing the HIGH/LOW status of the halfbridges
@@ -19,39 +18,39 @@
 //! Tle94112 Object
 Tle94112Ino controller = Tle94112Ino();
 
-//! Select pins for speed and direction settings
-#define pinDir    5
-#define pinSpeed  A0
-
 //! connect motor between halfbridge 1 and halfbridge 2
 void setup() 
 {
   // Enable MotorController Tle94112
   // Note: Required to be done before starting to configure the motor
   controller.begin();
-
-  pinMode(pinDir, INPUT);
-  pinMode(pinSpeed, INPUT);
 }
 
 
 void loop() {
-  // get desired direction from digital pin
-  uint8_t dir = digitalRead(pinDir);
-  if(dir == HIGH)
+
+  /* Configure the motor to use PWM with a duty cycle of 0% and forward direction. */
+  controller.configPWM(controller.TLE_PWM1, controller.TLE_FREQ80HZ, 0);
+  controller.configHB(controller.TLE_HB1, controller.TLE_HIGH, controller.TLE_PWM1);
+  controller.configHB(controller.TLE_HB2, controller.TLE_LOW, controller.TLE_NOPWM);
+
+  /* Ramp up duty cycle from 0% to 100%. */
+  for (uint8_t speed = 0; speed < 255; speed++)
   {
-    controller.configHB(controller.TLE_HB1, controller.TLE_HIGH, controller.TLE_PWM1);
-    controller.configHB(controller.TLE_HB2, controller.TLE_LOW, controller.TLE_NOPWM);
+    controller.configPWM(controller.TLE_PWM1, controller.TLE_FREQ80HZ, speed);
+    delay(10);
   }
-  else
+
+  /* Configure the motor to use PWM with a duty cycle of 0% and backward direction. */
+  controller.configPWM(controller.TLE_PWM1, controller.TLE_FREQ80HZ, 0);
+  controller.configHB(controller.TLE_HB1, controller.TLE_LOW, controller.TLE_NOPWM);
+  controller.configHB(controller.TLE_HB2, controller.TLE_HIGH, controller.TLE_PWM1);
+
+  /* Ramp up duty cycle from 0% to 100%. */
+  for (uint8_t speed = 0; speed < 255; speed++)
   {
-    controller.configHB(controller.TLE_HB1, controller.TLE_LOW, controller.TLE_NOPWM);
-    controller.configHB(controller.TLE_HB2, controller.TLE_HIGH, controller.TLE_PWM1);
+    controller.configPWM(controller.TLE_PWM1, controller.TLE_FREQ80HZ, 255-speed);
+    delay(10);
   }
 
-  // get desired motor speed from analog input
-  uint8_t dc = analogRead(pinSpeed) >> 2;
-
-  // update motor speed
-  controller.configPWM(controller.TLE_PWM1, controller.TLE_FREQ80HZ, dc);
-}
+}