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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-02-27 17:22:10 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-02-27 17:22:10 +0000 |
commit | a500a9ab6d73b61328c3e42e4b1e103ad0656e07 (patch) | |
tree | de43fbfd876483d92027827a96f03a6719621b0c /nuttx/configs/stm3240g-eval/src/up_deselectsram.c | |
parent | 8da4bbae2be9d158c6f9a9fd5e2bd3283f626f8d (diff) | |
download | px4-nuttx-a500a9ab6d73b61328c3e42e4b1e103ad0656e07.tar.gz px4-nuttx-a500a9ab6d73b61328c3e42e4b1e103ad0656e07.tar.bz2 px4-nuttx-a500a9ab6d73b61328c3e42e4b1e103ad0656e07.zip |
Add support for SRAM on board the STM3240G-EVAL board
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4430 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/configs/stm3240g-eval/src/up_deselectsram.c')
-rw-r--r-- | nuttx/configs/stm3240g-eval/src/up_deselectsram.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/nuttx/configs/stm3240g-eval/src/up_deselectsram.c b/nuttx/configs/stm3240g-eval/src/up_deselectsram.c new file mode 100644 index 000000000..ab01303fb --- /dev/null +++ b/nuttx/configs/stm3240g-eval/src/up_deselectsram.c @@ -0,0 +1,97 @@ +/************************************************************************************ + * configs/stm3240g-eval/src/up_deselectsram.c + * arch/arm/src/board/up_deselectsram.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <nuttx/config.h> + +#include <debug.h> + +#include "up_arch.h" +#include "stm32_fsmc.h" +#include "stm3240g-internal.h" + +#ifdef CONFIG_STM32_FSMC + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +/************************************************************************************ + * Public Data + ************************************************************************************/ + +/************************************************************************************ + * Private Data + ************************************************************************************/ + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: stm32_deselectsram + * + * Description: + * Disable SRAM + * + ************************************************************************************/ + +void stm32_deselectsram(void) +{ + /* Restore registers to their power up settings */ + + putreg32(FSMC_BCR_RSTVALUE, STM32_FSMC_BCR2); + + /* Bank1 NOR/SRAM timing register configuration */ + + putreg32(FSMC_BTR_RSTVALUE, STM32_FSMC_BTR2); + + /* Disable AHB clocking to the FSMC */ + + stm32_disablefsmc(); +} + +#endif /* CONFIG_STM32_FSMC */ + + + |