Replace default arguments with overloaded functions

Author: maxgerhardt

libraries/OPAMP/README.md

@@ -21,7 +21,7 @@ Electrical characteristics:
 
 ## Usage
 
-To startup the opamp, simply include the library and call `OPAMP.begin()`. You can optionally chose to use a low-speed (=lower power) or high-speed (default) mode.
+To startup the opamp, simply include the library and call `OPAMP.begin(speed)`. As the optional `speed` argument to this function, can chose either `OPAMP_SPEED_LOWSPEED` as the low-speed (=lower power) mode or `OPAMP_SPEED_HIGHSPEED` as the high-speed, high-power mode.
 
 ```cpp
 #include <OPAMP.h>

libraries/OPAMP/src/OPAMP.cpp

@@ -77,6 +77,10 @@ void OpampClass::initOpamp(OpampSpeedMode speed, uint8_t channel_mask) {
     }
 }
 
+bool OpampClass::begin() {
+    return this->begin(OPAMP_SPEED_HIGHSPEED);
+}
+
 bool OpampClass::begin(OpampSpeedMode speed) {
     return this->begin(1u << ARDUINO_DEFAULT_OPAMP_CHANNEL, speed);
 }

libraries/OPAMP/src/OPAMP.h

@@ -30,10 +30,12 @@ enum OpampSpeedMode {
 */
 class OpampClass {
 public:
-    /* startup the OPAMP on channel 0 */
-    bool begin(OpampSpeedMode speed = OPAMP_SPEED_HIGHSPEED);
+    /* startup the OPAMP on channel 0 in high-speed mode */
+    bool begin();
+    /* startup the OPAMP on channel 0 with specific mode */
+    bool begin(OpampSpeedMode speed);
     /* startup the OPAMP with arbitrary channel mask */
-    bool begin(uint8_t channel_mask, OpampSpeedMode speed = OPAMP_SPEED_HIGHSPEED);
+    bool begin(uint8_t channel_mask, OpampSpeedMode speed);
     /* stop all OPAMP channels */
     void end();
     /* stop specific OPAMP channel(s) */