Changes between Version 129 and Version 130 of library_stdio

Timestamp:

Oct 20, 2015, 11:23:36 AM (10 years ago)

Author:

alain

Comment:

--

library_stdio

@@ -439 +439 @@
 This function activates the transfer of a stream of images from a set of chained user buffers to the frame buffer. It must be used in conjunction with the giet_fbf_cma_display() function. The chained buffer descriptors should have been initialized by the giet_fbf_cma_init_buf() function.
 
- === 6) void '''giet_fbf_cma_display'''( unsigned int index ) ===
-This function enables the transfer of the buffer identified by the <index> argument.
-For each user buffer, the buffer status must be used as a SET/RESET synchronisation flip-flop, that is set by the application
-and reset by the CMA peripheral.  
-
- === 7) void '''giet_fbf_cma_stop'''( ) ===
+ === 6) void '''giet_fbf_cma_check'''( unsigned int index ) ===
+For each user buffer, the status is acting a SET/RESET synchronisation flip-flop, that is set by the application when the buffer is full, and is reset by the CMA peripheral when the transfer is completed.  
+This function set the status to enable the transfer of the buffer identified by the <index> argument.
+
+ === 7) void '''giet_fbf_cma_display'''( unsigned int index ) ===
+For each user buffer, the status is acting a SET/RESET synchronisation flip-flop, that is set by the application when the buffer is full, and is reset by the CMA peripheral when the transfer is completed.  
+This blocking function checks the status of the buffer identified by the <index> argument, and returns only when the buffer is empty.
+
+ === 8) void '''giet_fbf_cma_stop'''( ) ===
 This function desactivates the CMA channel allocated to the calling thread.
 
- === 8) void '''giet_fbf_sync_read'''( unsigned int offset , void* buffer , unsigned int length ) ===
+ === 9) void '''giet_fbf_sync_read'''( unsigned int offset , void* buffer , unsigned int length ) ===
 This blocking function use a memcopy strategy to transfer data from the frame buffer to an user buffer.
  * '''offset''' defines the offset (in bytes) in the frame buffer,
@@ -453 +456 @@
  * '''length'''  is the number of bytes to be transfered. 
 
- === 9) void '''giet_fbf_sync_write'''( unsigned int offset , void* buffer , unsigned int length ) ===
+ === 10) void '''giet_fbf_sync_write'''( unsigned int offset , void* buffer , unsigned int length ) ===
 This blocking function use a memcopy strategy to transfer data from an user buffer to the frame buffer.
  * '''offset''' defines the offset (in bytes) in the frame buffer,