From dfacf066dd89e8598529817bb0f6a1eab53ecaa4 Mon Sep 17 00:00:00 2001 From: patacongo Date: Fri, 16 Oct 2009 13:05:01 +0000 Subject: Add structure for future DMA support git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2141 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/arch/arm/src/stm32/Make.defs | 2 +- nuttx/arch/arm/src/stm32/stm32_dma.c | 84 +++++++++++++++++++++++++++++++ nuttx/arch/arm/src/stm32/stm32_internal.h | 15 ++++++ 3 files changed, 100 insertions(+), 1 deletion(-) create mode 100755 nuttx/arch/arm/src/stm32/stm32_dma.c (limited to 'nuttx/arch/arm/src/stm32') diff --git a/nuttx/arch/arm/src/stm32/Make.defs b/nuttx/arch/arm/src/stm32/Make.defs index 0ee07da40..95c3ae977 100755 --- a/nuttx/arch/arm/src/stm32/Make.defs +++ b/nuttx/arch/arm/src/stm32/Make.defs @@ -46,6 +46,6 @@ CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_copystate.c \ CHIP_ASRCS = CHIP_CSRCS = stm32_start.c stm32_rcc.c stm32_gpio.c stm32_irq.c \ - stm32_timerisr.c stm32_lowputc.c stm32_serial.c \ + stm32_timerisr.c stm32_dma.c stm32_lowputc.c stm32_serial.c \ stm32_spi.c diff --git a/nuttx/arch/arm/src/stm32/stm32_dma.c b/nuttx/arch/arm/src/stm32/stm32_dma.c new file mode 100755 index 000000000..3cf6ae0a1 --- /dev/null +++ b/nuttx/arch/arm/src/stm32/stm32_dma.c @@ -0,0 +1,84 @@ +/**************************************************************************** + * arch/arm/src/stm32/stm32_dma.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include +#include +#include +#include + +#include "up_arch.h" +#include "chip.h" +#include "stm32_dma.h" +#include "stm32_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: stm32_dmachannel + * + * Description: + * Allocate a DMA channel + * + * Returned Value: + * On success, a void* DMA channel handle; NULL on failure + * + ****************************************************************************/ + +DMA_HANDLE stm32_dmachannel(void) +{ + return NULL; +} diff --git a/nuttx/arch/arm/src/stm32/stm32_internal.h b/nuttx/arch/arm/src/stm32/stm32_internal.h index 8cb46d824..fc2df7d68 100755 --- a/nuttx/arch/arm/src/stm32/stm32_internal.h +++ b/nuttx/arch/arm/src/stm32/stm32_internal.h @@ -379,6 +379,8 @@ * Public Types ************************************************************************************/ +typedef FAR void *DMA_HANDLE; + /************************************************************************************ * Inline Functions ************************************************************************************/ @@ -474,6 +476,19 @@ EXTERN int stm32_dumpgpio(uint32 pinset, const char *msg); # define stm32_dumpgpio(p,m) #endif +/**************************************************************************** + * Name: stm32_dmachannel + * + * Description: + * Allocate a DMA channel + * + * Returned Value: + * On success, a void* DMA channel handle; NULL on failure + * + ****************************************************************************/ + +EXTERN DMA_HANDLE stm32_dmachannel(void); + /************************************************************************************ * Function: stm32_ethinitialize * -- cgit v1.2.3