Diff: main.cpp

Revision:

1:09a5e83ea18f

Parent:

0:dfdf46225b14

Child:

2:bd6594739176

--- a/main.cpp	Sun Mar 27 21:46:25 2016 +0000
+++ b/main.cpp	Mon Mar 28 07:02:30 2016 +0000
@@ -2,7 +2,9 @@
 
 #include "mbed.h"
 
-// See STM32F103x datasheet, chapter 5.3.19 "Temperature sensor characteristics", Table 50. "TS characteristics"
+// STM32F103x datasheet:
+// 5.3.19 "Temperature sensor characteristics" 
+// Table 50. "TS characteristics", Page 80
 const float         AVG_SLOPE   = 4.3E-03;
 const float         V25         = 1.43;
 const float         ACD_TO_VOLT = 3.3 / 4096;
@@ -43,8 +45,11 @@
 
     while(1) {        
         myled = !myled;
+        // STM32F103xx Reference Manual:
+        // 11.10 Temperature sensor
+        // Reading the temperature, Page 235
         HAL_ADC_Start(&hadc1);
-        while(HAL_ADC_PollForConversion(&hadc1, 0) != HAL_OK);
+        while(HAL_ADC_PollForConversion(&hadc1, 1000000) != HAL_OK);
         adcValue = HAL_ADC_GetValue(&hadc1);
         temp = (V25 - adcValue * ACD_TO_VOLT) / AVG_SLOPE + 25.0f;
         pc.printf("temp = %3.1f%cC\n", temp, 176);