1 files changed, 12 insertions, 2 deletions
diff --git a/os/hal/platforms/STM32L1xx/stm32_dma.h b/os/hal/platforms/STM32L1xx/stm32_dma.h
index bf3f3f3ca..71af4a339 100644
--- a/os/hal/platforms/STM32L1xx/stm32_dma.h
+++ b/os/hal/platforms/STM32L1xx/stm32_dma.h
@@ -59,9 +59,15 @@
 #define STM32_DMA_GETCHANNEL(n, c)  0
 
 /**
- * @name    DMA streams identifiers
- * @{
+ * @brief   Checks if a DMA priority is within the valid range.
+ * @param[in] prio      DMA priority
+ *
+ * @retval              The check result.
+ * @retval FALSE        invalid DMA priority.
+ * @retval TRUE         correct DMA priority.
  */
+#define STM32_DMA_IS_VALID_PRIORITY(prio) (((prio) >= 0) && ((prio) <= 3))
+
 /**
  * @brief   Returns an unique numeric identifier for a DMA stream.
  *
@@ -94,6 +100,10 @@
 #define STM32_DMA_IS_VALID_ID(id, mask) (((1 << (id)) & (mask)))
 
 /**
+ * @name    DMA streams identifiers
+ * @{
+ */
+/**
  * @brief   Returns a pointer to a stm32_dma_stream_t structure.
  *
  * @param[in] id        the stream numeric identifier