Diff: main.cpp

Revision:

4:e784c25594d7

Parent:

3:5467a013d0a0

Child:

6:3e184b0bcc33

--- a/main.cpp	Mon Nov 21 13:59:38 2016 +0000
+++ b/main.cpp	Thu Nov 24 08:52:42 2016 +0000
@@ -1,38 +1,25 @@
 #include "mbed.h"
 
-#define VREF         3300.0f  /* VRef in mV */
+/*
+   This basic example just shows how to read the ADC internal channels raw values.
+   Please look in the corresponding device reference manual for a complete
+   description of how to make a temperature sensor, VBat or Vref measurement.
+*/
 
-// Parameters for temperature sensor only
-#define AMBIENT_TEMP   25.0f  /* Ambient Temperature in °C */
-#define V25           760.0f  /* VSENSE value in mV at ambient temperature (see product datasheet) */
-#define AVG_SLOPE       2.5f  /* Average slope in mV/°C (see product datasheet) */
-
-AnalogIn vbat(ADC_VBAT); // To measure VBat
-AnalogIn tempsensor(ADC_TEMP); // To measure Temperature sensor
+AnalogIn adc_temp(ADC_TEMP);
+AnalogIn adc_vref(ADC_VREF);
+AnalogIn adc_vbat(ADC_VBAT); // Warning: Not available on all devices
 
 DigitalOut led(LED1);
 
 int main()
 {
-    float meas_f;
-    float JTemp_f;
-
-    printf("\nSTM32 Internal Channels example\n");
-
+    printf("\nSTM32 ADC internal channels reading example\n");
     while(1) {
-
-        // Measure VBat
-        // Note: As VBAT voltage could be higher than VDDA, to ensure the correct operation of the ADC, the
-        //       VBAT pin is internally connected to a bridge divider by 4.
-        printf("\nVBat = %.1f mV\n", vbat.read() * VREF * 4);
-
-        // Measure temperature sensor
-        meas_f = tempsensor.read();
-        // Compute the Junction Temperature value: JTemp = ((Vsens - V25)/Avg_Slope) + 25°C
-        JTemp_f = (((meas_f * VREF) - V25) / AVG_SLOPE) + AMBIENT_TEMP;
-
-        printf("Internal Temperature = %.1f degree C\n", JTemp_f);
-
+        printf("ADC Temp = %f\n", adc_temp.read());
+        printf("ADC VRef = %f\n", adc_vref.read());
+        printf("ADC VBat = %f\n", adc_vbat.read());
+        printf("\033[3A");
         led = !led;
         wait(1.0);
     }