Fixed #130. Prevent get Pin id if internal channels (16, 17)

ghi-electronics · Jan 10, 2018 · 19196ae · 19196ae
1 parent f732b1a
commit 19196ae
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/Targets/STM32F4/STM32F4_ADC.cpp b/Targets/STM32F4/STM32F4_ADC.cpp
@@ -115,7 +115,7 @@ TinyCLR_Result STM32F4_Adc_AcquireChannel(const TinyCLR_Adc_Provider* self, int3
     if (chNum >= STM32F4_AD_NUM)
         return TinyCLR_Result::NotAvailable;
 
-    if (!STM32F4_GpioInternal_OpenPin(STM32F4_Adc_GetPinForChannel(channel)))
+    if (chNum <=15 && !STM32F4_GpioInternal_OpenPin(STM32F4_Adc_GetPinForChannel(channel)))
         return TinyCLR_Result::SharingViolation;
 
     // init this channel if it's listed in the STM32F4_AD_CHANNELS array
@@ -149,7 +149,7 @@ TinyCLR_Result STM32F4_Adc_ReleaseChannel(const TinyCLR_Adc_Provider* self, int3
 
     // free GPIO pin if this channel is listed in the STM32F4_AD_CHANNELS array
     // and if it's not one of the internally connected ones as these channels don't take any GPIO pins
-    if (chNum < STM32F4_AD_NUM)
+    if (chNum <=15 && chNum < STM32F4_AD_NUM)
         STM32F4_GpioInternal_ClosePin(STM32F4_Adc_GetPinForChannel(channel));
 
     return TinyCLR_Result::Success;