#32 Adding comments if this project needs to be used with DotBot boar…

…d. This project calls the US driver, initializes US and starts the ranging implemented using PPI. The value of the ECHO pin from the US sensor is passed to a callback us_callback in the us_reading parameter.

projects/01bsp_us_ranging/01bsp_us_ranging.c

@@ -1,7 +1,9 @@
 /**
  * @file 01bsp_us_ranging.c
  * @author Trifun Savic <[email protected]>
+ *
  * @brief This is a short example of how to do Ultrasound ranging with HC-SR04 sensor on the DotBot board.
+ * This code currently works on nRF52840. To use the code on DotBot you need to define different GPIO for US sensor ON and READ pin (trigger and echo) in hc_sr04.c
  *
  * @copyright Inria, 2022
  *
@@ -38,6 +40,9 @@ int main(void) {
     timer0 = NRF_TIMER0;
     timer1 = NRF_TIMER1;
 
+    // uncomment if using this code on DotBot Turn ON the DotBot board regulator
+    //db_board_init();
+
     // initilize the US sensor, set callback and chose the timers
     us_init(&us_callback, &timer_callback, timer0, timer1);