7a6a5b7bd0
The main features are:
1. DMA2D interface
Supports the nuttx pixel formats:
- FB_FMT_RGB8
- FB_FMT_RGB24
- FB_FMT_RGB16_565
Dynamic layer allocation during runtime for the supported formats
- The number of allocatable layer can be configured.
Supported dma2d operation:
- blit (Copy content from source to destination layer) also works with
selectable area.
- blend (Blend two layer and copy the result to a destination layer wich can
be a third layer or one of the source layer) also works with selectable
area.
- fillarea (Fill a defined area of the whole layer with a specific color)
As a result of that the dma2d controller can't transfer data from the core coupled memory, CCM is disabled but usable by the ccm allocator. Currently the ccm allocator is used for allocating the layer structurei only. For the dma memory (layers frame buffer) memory is allocated from heap 2 and 3.
2. LTDC interface
I have changed the api for the currently non implemented operations:
- blit (Copy content from a dma2d layer to an ltdc layer) also works with
selectable area.
- blend (Blend two dma2d layer and copy the result to a destination ltdc
layer) also works with selectable area.
Note! ltdc layer is a layer referenced by the ltdc interface. dma2d layer
is a layer referenced by the dma2d interface.
One of the most important questions for me was, How can i flexible use an
ltdc layer with the dma2d interface, e.g. as source layer for dma2d
operations?
Get the layer id of the related dma2d layer by a special flag when using
getlid() function of the ltdc interface and use the layer id to reference
the specific dma2d layer by the dma2d interface.
The ltdc coupled dma2d layers are predefined and can't be dynamically
allocated of freed. They use the same frame buffer memory and the same
color lookup table.
Changes:
- layer internal format of the clut table
- interrupt handling for register reload (vertical vblank) instead using
waiting loop
- small fixes and refactoring
From Marco Krahl.
137 lines
4.7 KiB
C
137 lines
4.7 KiB
C
/****************************************************************************
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* arch/arm/src/common/stm32_ccm.h
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* Based on a prototype by Petteri Aimonen
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_STM32_STM32_CCM_H
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#define __ARCH_ARM_SRC_STM32_STM32_CCM_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/mm/mm.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Assume that we can support the CCM heap */
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#define HAVE_CCM_HEAP 1
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/* Only the STM32 F2, F3, and F4 have CCM memory */
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#if defined(CONFIG_STM32_STM32F30XX)
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# define CCM_START 0x10000000
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# define CCM_END 0x10002000
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#elif defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F40XX)
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# define CCM_START 0x10000000
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# define CCM_END 0x10010000
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#else
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# undef HAVE_CCM_HEAP
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#endif
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/* In order to use the CCM heap, it had to have been excluded from the main
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* heap.
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*/
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#ifndef CONFIG_STM32_CCMEXCLUDE
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# undef HAVE_CCM_HEAP
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#endif
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/* Can we support the CCM heap? */
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#ifdef HAVE_CCM_HEAP
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/* ccm_initialize must be called early in initialization in order to
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* initialize the CCM heap.
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*/
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#define ccm_initialize() \
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mm_initialize(&g_ccm_heap, (FAR void *)CCM_START, CCM_END-CCM_START)
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/* The ccm_addregion interface could be used if, for example, you want to
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* add some other memory region to the CCM heap. I don't really know why
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* you might want to do that, but the functionality is essentially free.
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*/
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#define ccm_addregion(b,s) mm_addregion(&g_ccm_heap, b, s);
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/* Then, once g_ccm_heap has been setup by ccm_initialize(), these memory
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* allocators can be used just like the standard memory allocators.
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*/
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#define ccm_malloc(s) mm_malloc(&g_ccm_heap, s)
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#define ccm_zalloc(s) mm_zalloc(&g_ccm_heap, s)
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#define ccm_calloc(n,s) mm_calloc(&g_ccm_heap, n,s)
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#define ccm_free(p) mm_free(&g_ccm_heap, p)
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#define ccm_realloc(p,s) mm_realloc(&g_ccm_heap, p, s)
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#define ccm_memalign(a,s) mm_memalign(&g_ccm_heap, a, s)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifndef __ASSEMBLY__
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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EXTERN struct mm_heap_s g_ccm_heap;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* HAVE_CCM_HEAP */
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#endif /* __ARCH_ARM_SRC_STM32_STM32_CCM_H */
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