diff --git a/libraries/HAL_Drivers/drv_adc.c b/libraries/HAL_Drivers/drv_adc.c
index 39ee4c7..ec4980c 100644
--- a/libraries/HAL_Drivers/drv_adc.c
+++ b/libraries/HAL_Drivers/drv_adc.c
@@ -98,7 +98,7 @@ static rt_uint8_t stm32_adc_get_resolution(struct rt_adc_device *device)
 
 static rt_uint32_t stm32_adc_get_channel(rt_uint32_t channel)
 {
-    rt_uint32_t stm32_channel = 0;
+    rt_uint32_t stm32_channel = RT_UINT32_MAX;
 
     switch (channel)
     {
@@ -167,6 +167,11 @@ static rt_uint32_t stm32_adc_get_channel(rt_uint32_t channel)
     case 19:
         stm32_channel = ADC_CHANNEL_19;
         break;
+#endif
+#ifdef ADC_CHANNEL_TEMPSENSOR
+    case 32:
+        stm32_channel = ADC_CHANNEL_TEMPSENSOR;
+        break;
 #endif
     }
 
@@ -191,37 +196,11 @@ static rt_err_t stm32_adc_get_value(struct rt_adc_device *device, rt_uint32_t ch
 
     rt_memset(&ADC_ChanConf, 0, sizeof(ADC_ChanConf));
 
-#ifndef ADC_CHANNEL_16
-    if (channel == 16)
+    /* set stm32 ADC channel */
+    ADC_ChanConf.Channel =  stm32_adc_get_channel(channel);
+    if (ADC_ChanConf.Channel == RT_UINT32_MAX)
     {
-        LOG_E("ADC channel must not be 16.");
-        return -RT_ERROR;
-    }
-#endif
-
-/* ADC channel number is up to 17 */
-#if !defined(ADC_CHANNEL_18)
-    if (channel <= 17)
-/* ADC channel number is up to 19 */
-#elif defined(ADC_CHANNEL_19)
-    if (channel <= 19)
-/* ADC channel number is up to 18 */
-#else
-    if (channel <= 18)
-#endif
-    {
-        /* set stm32 ADC channel */
-        ADC_ChanConf.Channel =  stm32_adc_get_channel(channel);
-    }
-    else
-    {
-#if !defined(ADC_CHANNEL_18)
-        LOG_E("ADC channel must be between 0 and 17.");
-#elif defined(ADC_CHANNEL_19)
-        LOG_E("ADC channel must be between 0 and 19.");
-#else
-        LOG_E("ADC channel must be between 0 and 18.");
-#endif
+        LOG_E("ADC channel%d isn't exist", channel);
         return -RT_ERROR;
     }