diff --git a/os/io/adc.c b/os/io/adc.c
index 8b4123bcd..1860f88aa 100644
--- a/os/io/adc.c
+++ b/os/io/adc.c
@@ -50,7 +50,7 @@ void adcObjectInit(ADCDriver *adcp) {
  * @brief Configures and activates the ADC peripheral.
  *
  * @param[in] adcp pointer to the @p ADCDriver object
- * @param config pointer to the @p ADCConfig object
+ * @param[in] config pointer to the @p ADCConfig object
  */
 void adcStart(ADCDriver *adcp, const ADCConfig *config) {
 
@@ -80,4 +80,95 @@ void adcStop(ADCDriver *adcp) {
   adcp->spd_state = ADC_STOP;
 }
 
+/**
+ * @brief Starts an ADC conversion.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ * @param[in] grpp pointer to a @p ADCConversionGroup object
+ * @param[out] samples pointer to the samples buffer
+ * @return The operation status.
+ * @retval FALSE the conversion has been started.
+ * @retval TRUE the driver is busy, conversion not started.
+ */
+bool_t adcStartConversion(ADCDriver *adcp,
+                          ADCConversionGroup *grpp,
+                          void *samples) {
+
+  chDbgCheck((adcp != NULL) && (grpp != NULL) && (samples != NULL),
+             "adcStartConversion");
+
+  chSysLock();
+
+  chDbgAssert((adcp->adc_state == ADC_READY) ||
+              (adcp->adc_state == ADC_RUNNING),
+              "adcStartConversion(), #1",
+              "invalid state");
+
+  if (adcp->adc_state == ADC_RUNNING) {
+    chSysUnlock();
+    return TRUE;
+  }
+
+  adc_lld_start_conversion(adcp, grpp, samples);
+  adcp->adc_state = ADC_RUNNING;
+
+  chSysUnlock();
+  return FALSE;
+}
+
+/**
+ * @brief Stops an ongoing conversion.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ */
+void adcStopConversion(ADCDriver *adcp) {
+
+  chDbgCheck(adcp != NULL, "adcStopConversion");
+
+  chSysLock();
+
+  chDbgAssert((adcp->adc_state == ADC_READY) ||
+              (adcp->adc_state == ADC_RUNNING),
+              "adcStopConversion(), #1",
+              "invalid state");
+
+  adc_lld_start_conversion(adcp, grpp, samples);
+  adcp->adc_state = ADC_READY;
+
+  chSysUnlock();
+}
+
+/**
+ * @brief Waits for completion.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ * @param[in] timeout the number of ticks before the operation timeouts,
+ *                    the following special values are allowed:
+ *                    - @a TIME_IMMEDIATE immediate timeout.
+ *                    - @a TIME_INFINITE no timeout.
+ *                    .
+ * @return The operation result.
+ * @retval RDY_OK conversion not running.
+ * @retval RDY_RESET conversion finished.
+ * @retval RDY_TIMEOUT conversion not finished within the specified time.
+ */
+msg_t adcWaitConversion(ADCDriver *adcp, systme_t timeout) {
+  msg_t msg;
+
+  chSysLock();
+
+  chDbgAssert((adcp->adc_state == ADC_READY) ||
+              (adcp->adc_state == ADC_RUNNING),
+              "adcWaitConversion(), #1",
+              "invalid state");
+
+  if (adcp->adc_state == ADC_RUNNING)
+    msg = chSemWaitTimeoutS(&adcp->adc_sem, timeout);
+  else
+    msg = RDY_OK;
+
+  chSysUnlock();
+  return msg;
+}
+
 /** @} */
diff --git a/os/io/adc.h b/os/io/adc.h
index 628191c4f..a7506f636 100644
--- a/os/io/adc.h
+++ b/os/io/adc.h
@@ -34,7 +34,7 @@ typedef enum {
   ADC_UNINIT = 0,                           /**< @brief Not initialized.    */
   ADC_STOP = 1,                             /**< @brief Stopped.            */
   ADC_READY = 2,                            /**< @brief Ready.              */
-  ADC_ACTIVE = 3                            /**< @brief Conversion running. */
+  ADC_RUNNING = 3                           /**< @brief Conversion complete.*/
 } adcstate_t;
 
 #include "adc_lld.h"
diff --git a/os/io/spi.c b/os/io/spi.c
index 231fc7ad2..10eabb87e 100644
--- a/os/io/spi.c
+++ b/os/io/spi.c
@@ -55,7 +55,7 @@ void spiObjectInit(SPIDriver *spip) {
  * @brief Configures and activates the SPI peripheral.
  *
  * @param[in] spip pointer to the @p SPIDriver object
- * @param config pointer to the @p SPIConfig object
+ * @param[in] config pointer to the @p SPIConfig object
  */
 void spiStart(SPIDriver *spip, const SPIConfig *config) {