Merge pull request #506 from duempel/cdc_without_dtr

CDC without DTR being set

2 files changed, 22 insertions, 0 deletions

diff --git a/src/common/tusb_fifo.c b/src/common/tusb_fifo.c
index f41cf9f6c..608bfd081 100644
--- a/src/common/tusb_fifo.c
+++ b/src/common/tusb_fifo.c
@@ -599,6 +599,27 @@ bool tu_fifo_clear(tu_fifo_t *f)
 
 /******************************************************************************/
 /*!
+    @brief Change the fifo mode to overwritable or not overwritable
+
+    @param[in]  f
+                Pointer to the FIFO buffer to manipulate
+    @param[in]  overwritable
+                Overwritable mode the fifo is set to
+*/
+/******************************************************************************/
+bool tu_fifo_set_overwritable(tu_fifo_t *f, bool overwritable)
+{
+  tu_fifo_lock(f);
+
+  f->overwritable = overwritable;
+
+  tu_fifo_unlock(f);
+
+  return true;
+}
+
+/******************************************************************************/
+/*!
     @brief Advance write pointer - intended to be used in combination with DMA.
     It is possible to fill the FIFO by use of a DMA in circular mode. Within
     DMA ISRs you may update the write pointer to be able to read from the FIFO.
diff --git a/src/common/tusb_fifo.h b/src/common/tusb_fifo.h
index b87695743..b965386ab 100644
--- a/src/common/tusb_fifo.h
+++ b/src/common/tusb_fifo.h
@@ -89,6 +89,7 @@ typedef struct
         .non_used_index_space   = 0xFFFF - 2*_depth-1,                  \
     }
 
+bool tu_fifo_set_overwritable(tu_fifo_t *f, bool overwritable);
 bool tu_fifo_clear(tu_fifo_t *f);
 bool tu_fifo_config(tu_fifo_t *f, void* buffer, uint16_t depth, uint16_t item_size, bool overwritable);