Changes between Version 29 and Version 30 of library_stdio

Timestamp:

Oct 29, 2014, 8:36:16 AM (11 years ago)

Author:

alain

Comment:

--

library_stdio

@@ -146 +146 @@
 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, ''buffer''  is the user buffer base address, ''length''  is the number of bytes to be transfered. 
 
+ === void '''giet_fbf_cma_alloc'''()
+This function allocates a private CMA channel  to the calling task, and registers the channel index
+in the task context.
+Task exit if no CMA channel available
+
  === void '''giet_fbf_cma_start'''( void* buf0, void* buf1, unsigned int length ) === 
 This function initializes the chained buffer DMA controller (CMA) to transfer a stream of images from two user buffers to the frame buffer. It must be used in conjunction with the giet_fbf_cma_display() function. A CMA channel should have been allocated to the calling task in the application mapping.