fix on ack and introducing DL1 & DL2 naming

Author: gbr1

src/Arduino_Alvik.cpp

@@ -56,7 +56,7 @@ int Arduino_Alvik::begin(const bool verbose, const uint8_t core){
 
   verbose_output = verbose;
 
-  last_ack = 0;
+  last_ack = 255;
 
   version[0] = 0;
   version[1] = 0;
@@ -130,9 +130,8 @@ int Arduino_Alvik::begin(const bool verbose, const uint8_t core){
 
 
   uart->begin(UART_BAUD_RATE);
-  uart->flush();
 
-  
+
   pinMode(CHECK_STM32, INPUT_PULLDOWN);
   pinMode(RESET_STM32, OUTPUT);
   pinMode(NANO_CHK, OUTPUT);
@@ -149,6 +148,11 @@ int Arduino_Alvik::begin(const bool verbose, const uint8_t core){
   delay(100);
   reset_hw();
 
+  uart->flush();
+  while (uart->available()){
+    uart->read();
+  }
+
   wait_for_ack();
 
   set_illuminator(true);

src/definitions.h

@@ -27,6 +27,9 @@
 #define UART 0
 #define UART_BAUD_RATE 460800
 
+#define DL1 left_led
+#define DL2 right_led
+
 #define CHARGE_THRESHOLD 97
 
 const float WHEEL_DIAMETER_MM = 34.0;