Diff: main.cpp

Revision:

0:de1853b9f5b9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Jun 29 07:52:22 2017 +0000
@@ -0,0 +1,93 @@
+/* 
+ *  This VL53L0X Expansion board test application performs range measurements
+ *  using the onboard embedded centre sensor, in singleshot, polling mode. 
+ *  Measured ranges are displayed on the on-board 4-digit display.
+ *
+ *  The User Blue button stops the current measurement and entire program, 
+ *  releasing all resources.
+ *
+ *  The Reset button can be used to restart the program.  
+ */
+ 
+#include <string.h>
+#include <stdio.h>
+ 
+#include "mbed.h"
+#include "x_nucleo_53l0a1.h"
+ 
+#define VL53L0_I2C_SDA   D14 
+#define VL53L0_I2C_SCL   D15 
+ 
+static X_NUCLEO_53L0A1 *board = NULL;
+VL53L0X_RangingMeasurementData_t data_sensor_centre;
+OperatingMode operating_mode;
+    
+/* flags that handle interrupt request */
+bool int_stop_measure = false;   
+ 
+/* ISR callback function of the user blue button to stop program */
+void StopMeasureIRQ(void)
+{
+   int_stop_measure = true;
+}
+ 
+/* On board 4 digit local display refresh */
+void DisplayRefresh(VL53L0X_RangingMeasurementData_t sensor_range_data)
+{   
+   char str[5];
+   
+   if (sensor_range_data.RangeStatus == 0) // we have a valid range.
+   {
+      sprintf(str,"%d", sensor_range_data.RangeMilliMeter);
+   }
+   else
+   {
+      sprintf(str,"%s","----");
+   }
+     
+   board->display->display_string(str);
+}
+ 
+/*=================================== Main ==================================
+ Press the blue user button to stop measurements in progress    
+=============================================================================*/
+int main()
+{
+#if USER_BUTTON == PC_13  // we are cross compiling for Nucleo-f401 
+   InterruptIn stop_button(USER_BUTTON);
+   stop_button.rise(&StopMeasureIRQ);  
+#endif   
+ 
+   DevI2C *device_i2c = new DevI2C(VL53L0_I2C_SDA, VL53L0_I2C_SCL);     
+   int status;
+        
+   /* creates the 53L0A1 expansion board singleton obj */
+   board=X_NUCLEO_53L0A1::instance(device_i2c, A2, D8, D2);
+    
+   board->display->display_string("53L0");
+   /* init the 53L0A1 expansion board with default values */
+   status = board->init_board();
+   if (status) printf("Failed to init board!\n\r");   
+   operating_mode = range_single_shot_polling;
+   /* start the measure on sensor centre */
+   status = board->sensor_centre->start_measurement(operating_mode, NULL);
+   if (!status)
+   {
+      while (1) // infinite loop. can be broken by pressing Blue (User) button.
+      {
+         status = board->sensor_centre->get_measurement(operating_mode, &data_sensor_centre);
+         DisplayRefresh(data_sensor_centre);
+         if (int_stop_measure) // Blue Button isr was triggered
+         {
+            status = board->sensor_centre->stop_measurement(operating_mode); // stop the measure and exit
+            int_stop_measure = false;
+            printf("\nProgram stopped!\n\n\r");
+            break;
+         }
+      }
+   }
+   board->display->display_string("BYE");
+   delete board;        
+}
+ 
+            
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