Diff: main.cpp

Revision:

0:cd8e818d4288

diff -r 000000000000 -r cd8e818d4288 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jun 09 07:21:19 2017 +0000
@@ -0,0 +1,113 @@
+#include "mbed.h"
+#include "x_nucleo_53l0a1.h"
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+
+/* This VL53L0X Expansion board test application performs a range measurement in polling mode
+   on the onboard embedded top sensor. 
+   The measured data is displayed on the on-board 4-digit display.
+
+   User Blue button stops the current measurement and the entire program, releasing all resources.
+   Reset button is used to restart the program. */
+
+/* Polling operating modes don`t require callback function that handles IRQ 
+   Callback IRQ functions are used only for measure that require interrupt */
+
+/* GetMeasurement is asynchronous! It returns NOT_READY if the measurement value 
+   is not ready to be read from the corresponding register. So you need to wait
+   for the result to be ready */
+
+#define VL53L0_I2C_SDA   D14 
+#define VL53L0_I2C_SCL   D15 
+
+#define RANGE   0
+
+static X_NUCLEO_53L0A1 *board=NULL;
+VL53L0X_RangingMeasurementData_t data_sensor_centre;
+OperatingMode operating_mode;
+    
+/* flags that handle interrupt request */
+bool int_sensor_centre=false, int_stop_measure=false;   
+
+/* ISR callback function of the sensor_centre */
+void SensorTopIRQ(void)
+{
+   int_sensor_centre=true;
+   board->sensor_centre->DisableInterruptMeasureDetectionIRQ();
+}   
+
+/* 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(OperatingMode op_mode)
+{   
+   char str[5];
+   
+   if (op_mode==range_single_shot_polling || op_mode==range_continuous_interrupt || op_mode==range_continuous_polling)
+   {
+      if (data_sensor_centre.RangeStatus == 0) // we have a valid range.
+      {
+         sprintf(str,"%d",data_sensor_centre.RangeMilliMeter);
+      }
+      else
+      {
+         sprintf(str,"%s","----");
+      }
+   }
+     
+   board->display->DisplayString(str);
+}
+
+void RangeMeasure(DevI2C *device_i2c) {
+   int status;
+
+   /* creates the 53L0A1 expansion board singleton obj */
+   board=X_NUCLEO_53L0A1::Instance(device_i2c, A2, D8, D2);
+    
+   board->display->DisplayString("53L0");
+   /* init the 53L0A1 expansion board with default values */
+   status=board->InitBoard();
+   if(status)
+      printf("Failed to init board!\n\r");   
+   operating_mode=range_single_shot_polling;
+   /* start the measure on sensor top */
+   status=board->sensor_centre->StartMeasurement(operating_mode, SensorTopIRQ);
+   if(!status)
+   {
+      while(1)
+      {
+         status=board->sensor_centre->GetMeasurement(operating_mode, &data_sensor_centre);
+         DisplayRefresh(operating_mode);
+         if(int_stop_measure) // Blue Button isr was triggered
+         {
+            status=board->sensor_centre->StopMeasurement(operating_mode); // stop the measure and exit
+            int_stop_measure = false;
+            printf("\nProgram stopped!\n\n\r");
+            break;
+         }
+      }
+   }
+   board->display->DisplayString("BYE");
+   delete board;        
+}    
+
+/*=================================== Main ==================================
+ Press the blue user button to stop the 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);     
+        
+   RangeMeasure(device_i2c);  // start continuous measures
+}
+