diff --git a/src/temp_sensor.c b/src/temp_sensor.c
index 0df956e..6c65ad7 100644
--- a/src/temp_sensor.c
+++ b/src/temp_sensor.c
@@ -72,7 +72,6 @@ static fxp_t calc_temperature_ntc(uint16_t adc_val)
 	return fxp_sub(temp_k, celsius2kelvin);
 }
 
-
 void temp_sensor_init(void)
 {
 	uint8_t channels[ADC_NUM_CHANNELS] = {
@@ -155,3 +154,58 @@ fxp_t temp_sensor_get_internal_temperature(void)
 {
 	return m_temperature_internal;
 }
+
+
+
+// BEGIN temporary import from libopencm3
+
+void adc_set_regular_sequence(uint32_t adc, uint8_t length, uint8_t channel[])
+{
+	uint32_t reg32 = 0;
+	uint8_t i = 0;
+	bool stepup = false, stepdn = false;
+
+	if (length == 0) {
+		ADC_CHSELR(adc) = 0;
+		return;
+	}
+
+	reg32 |= (1 << channel[0]);
+
+	for (i = 1; i < length; i++) {
+		reg32 |= (1 << channel[i]);
+		stepup |= channel[i-1] < channel[i];
+		stepdn |= channel[i-1] > channel[i];
+	}
+
+	/* Check, if the channel list is in order */
+	if (stepup && stepdn) {
+		//cm3_assert_not_reached();
+	}
+
+	/* Update the scan direction flag */
+	if (stepdn) {
+		ADC_CFGR1(adc) |= ADC_CFGR1_SCANDIR;
+	} else {
+		ADC_CFGR1(adc) &= ~ADC_CFGR1_SCANDIR;
+	}
+
+	ADC_CHSELR(adc) = reg32;
+}
+
+/*---------------------------------------------------------------------------*/
+/** @brief ADC Set the Sample Time for All Channels
+ *
+ * The sampling time can be selected in ADC clock cycles from 1.5 to 239.5,
+ * same for all channels.
+ *
+ * @param[in] adc Unsigned int32. ADC base address (@ref adc_reg_base)
+ * @param[in] time Unsigned int8. Sampling time selection (@ref adc_api_smptime)
+ */
+
+void adc_set_sample_time_on_all_channels(uint32_t adc, uint8_t time)
+{
+	ADC_SMPR1(adc) = time;
+}
+
+// END temporary import from libopencm3