Browse Source
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4430 7fd9a85b-ad96-42d3-883c-3090e2eb8679sbg
patacongo
13 years ago
12 changed files with 826 additions and 191 deletions
@ -1,90 +1,96 @@
@@ -1,90 +1,96 @@
|
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/************************************************************************************
|
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* configs/stm3240g-eval/src/up_boot.c |
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* arch/arm/src/board/up_boot.c |
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* |
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* Copyright (C) 2011 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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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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* |
||||
* 1. Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
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* 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 |
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* distribution. |
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* 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 |
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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, |
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
||||
* 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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|
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/************************************************************************************
|
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* Included Files |
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************************************************************************************/ |
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|
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#include <nuttx/config.h> |
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#include <debug.h> |
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#include <arch/board/board.h> |
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|
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#include "up_arch.h" |
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#include "stm3240g-internal.h" |
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|
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/************************************************************************************
|
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* Definitions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Private Functions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Public Functions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Name: stm32_boardinitialize |
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* |
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* Description: |
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* All STM32 architectures must provide the following entry point. This entry point |
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* is called early in the intitialization -- after all memory has been configured |
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* and mapped but before any devices have been initialized. |
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* |
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************************************************************************************/ |
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|
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void stm32_boardinitialize(void) |
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{ |
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/* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function
|
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* stm32_spiinitialize() has been brought into the link. |
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*/ |
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|
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#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) || defined(CONFIG_STM32_SPI3) |
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if (stm32_spiinitialize) |
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{ |
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stm32_spiinitialize(); |
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} |
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#endif |
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|
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/* Configure on-board LEDs if LED support has been selected. */ |
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|
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#ifdef CONFIG_ARCH_LEDS |
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up_ledinit(); |
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#endif |
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} |
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/************************************************************************************
|
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* configs/stm3240g-eval/src/up_boot.c |
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* arch/arm/src/board/up_boot.c |
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* |
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* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* 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. |
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* |
||||
************************************************************************************/ |
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|
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/************************************************************************************
|
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* Included Files |
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************************************************************************************/ |
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|
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#include <nuttx/config.h> |
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|
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#include <debug.h> |
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#include <arch/board/board.h> |
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#include "up_arch.h" |
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#include "stm3240g-internal.h" |
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|
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/************************************************************************************
|
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* Definitions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Private Functions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Public Functions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Name: stm32_boardinitialize |
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* |
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* Description: |
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* All STM32 architectures must provide the following entry point. This entry point |
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* is called early in the intitialization -- after all memory has been configured |
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* and mapped but before any devices have been initialized. |
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* |
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************************************************************************************/ |
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|
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void stm32_boardinitialize(void) |
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{ |
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/* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function
|
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* stm32_spiinitialize() has been brought into the link. |
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*/ |
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|
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#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) || defined(CONFIG_STM32_SPI3) |
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if (stm32_spiinitialize) |
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{ |
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stm32_spiinitialize(); |
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} |
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#endif |
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/* If the FSMC is enabled, then enable SRAM access */ |
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#ifdef CONFIG_STM32_FSMC |
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stm32_selectsram(); |
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#endif |
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/* Configure on-board LEDs if LED support has been selected. */ |
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|
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#ifdef CONFIG_ARCH_LEDS |
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up_ledinit(); |
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#endif |
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} |
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@ -0,0 +1,97 @@
@@ -0,0 +1,97 @@
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/************************************************************************************
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* configs/stm3240g-eval/src/up_deselectsram.c |
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* arch/arm/src/board/up_deselectsram.c |
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* |
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* Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* 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. |
||||
* |
||||
************************************************************************************/ |
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|
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/************************************************************************************
|
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* Included Files |
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************************************************************************************/ |
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|
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#include <nuttx/config.h> |
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#include <debug.h> |
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#include "up_arch.h" |
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#include "stm32_fsmc.h" |
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#include "stm3240g-internal.h" |
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#ifdef CONFIG_STM32_FSMC |
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/************************************************************************************
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* Pre-processor Definitions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Public Data |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Private Data |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Private Functions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Public Functions |
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************************************************************************************/ |
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|
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/************************************************************************************
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* Name: stm32_deselectsram |
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* |
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* Description: |
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* Disable SRAM |
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* |
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************************************************************************************/ |
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void stm32_deselectsram(void) |
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{ |
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/* Restore registers to their power up settings */ |
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putreg32(FSMC_BCR_RSTVALUE, STM32_FSMC_BCR2); |
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/* Bank1 NOR/SRAM timing register configuration */ |
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putreg32(FSMC_BTR_RSTVALUE, STM32_FSMC_BTR2); |
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/* Disable AHB clocking to the FSMC */ |
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stm32_disablefsmc(); |
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} |
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#endif /* CONFIG_STM32_FSMC */ |
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@ -0,0 +1,188 @@
@@ -0,0 +1,188 @@
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/************************************************************************************
|
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* configs/stm3240g-eval/src/up_extmem.c |
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* arch/arm/src/board/up_extmem.c |
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* |
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* 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. |
||||
* |
||||
************************************************************************************/ |
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|
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/************************************************************************************
|
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* Included Files |
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************************************************************************************/ |
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|
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#include <nuttx/config.h> |
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|
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#include <stdint.h> |
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#include <assert.h> |
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#include <debug.h> |
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#include <arch/board/board.h> |
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#include "chip.h" |
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#include "up_arch.h" |
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#include "stm32_fsmc.h" |
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#include "stm32_gpio.h" |
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#include "stm32_internal.h" |
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#include "stm3240g-internal.h" |
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|
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/************************************************************************************
|
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* Pre-processor Definitions |
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************************************************************************************/ |
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#ifndef CONFIG_STM32_FSMC |
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# warning "FSMC is not enabled" |
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#endif |
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#if STM32_NGPIO_PORTS < 6 |
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# error "Required GPIO ports not enabled" |
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#endif |
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#define STM32_FSMC_NADDRCONFIGS 26 |
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#define STM32_FSMC_NDATACONFIGS 16 |
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/************************************************************************************
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* Public Data |
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************************************************************************************/ |
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/* GPIO configurations common to most external memories */ |
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static const uint32_t g_addressconfig[STM32_FSMC_NADDRCONFIGS] = |
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{ |
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GPIO_FSMC_A0, GPIO_FSMC_A1 , GPIO_FSMC_A2, GPIO_FSMC_A3, GPIO_FSMC_A4 , GPIO_FSMC_A5, |
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GPIO_FSMC_A6, GPIO_FSMC_A7, GPIO_FSMC_A8, GPIO_FSMC_A9, GPIO_FSMC_A10, GPIO_FSMC_A11, |
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GPIO_FSMC_A12, GPIO_FSMC_A13, GPIO_FSMC_A14, GPIO_FSMC_A15, GPIO_FSMC_A16, GPIO_FSMC_A17, |
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GPIO_FSMC_A18, GPIO_FSMC_A19, GPIO_FSMC_A20, GPIO_FSMC_A21, GPIO_FSMC_A22, GPIO_FSMC_A23, |
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GPIO_FSMC_A24, GPIO_FSMC_A25 |
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}; |
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static const uint32_t g_dataconfig[STM32_FSMC_NDATACONFIGS] = |
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{ |
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GPIO_FSMC_D0, GPIO_FSMC_D1 , GPIO_FSMC_D2, GPIO_FSMC_D3, GPIO_FSMC_D4 , GPIO_FSMC_D5, |
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GPIO_FSMC_D6, GPIO_FSMC_D7, GPIO_FSMC_D8, GPIO_FSMC_D9, GPIO_FSMC_D10, GPIO_FSMC_D11, |
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GPIO_FSMC_D12, GPIO_FSMC_D13, GPIO_FSMC_D14, GPIO_FSMC_D15 |
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}; |
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/************************************************************************************
|
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* Private Data |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Private Functions |
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************************************************************************************/ |
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|
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/************************************************************************************
|
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* Public Functions |
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************************************************************************************/ |
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|
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/************************************************************************************
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* Name: stm32_extmemgpios |
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* |
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* Description: |
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* Initialize GPIOs for external memory usage |
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* |
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************************************************************************************/ |
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|
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void stm32_extmemgpios(const uint32_t *gpios, int ngpios) |
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{ |
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int i; |
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/* Configure GPIOs */ |
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|
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for (i = 0; i < ngpios; i++) |
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{ |
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stm32_configgpio(gpios[i]); |
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} |
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} |
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|
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/************************************************************************************
|
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* Name: stm32_extmemaddr |
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* |
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* Description: |
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* Initialize adress line GPIOs for external memory access |
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* |
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************************************************************************************/ |
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|
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void stm32_extmemaddr(int naddrs) |
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{ |
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stm32_extmemgpios(g_addressconfig, naddrs); |
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} |
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|
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/************************************************************************************
|
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* Name: stm32_extmemdata |
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* |
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* Description: |
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* Initialize data line GPIOs for external memory access |
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* |
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************************************************************************************/ |
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|
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void stm32_extmemdata(int ndata) |
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{ |
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stm32_extmemgpios(g_dataconfig, ndata); |
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} |
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|
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/************************************************************************************
|
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* Name: stm32_enablefsmc |
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* |
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* Description: |
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* enable clocking to the FSMC module |
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* |
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************************************************************************************/ |
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|
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void stm32_enablefsmc(void) |
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{ |
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uint32_t regval; |
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|
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/* Enable AHB clocking to the FSMC */ |
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|
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regval = getreg32( STM32_RCC_AHB3ENR); |
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regval |= RCC_AHB3ENR_FSMCEN; |
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putreg32(regval, STM32_RCC_AHB3ENR); |
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} |
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|
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/************************************************************************************
|
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* Name: stm32_disablefsmc |
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* |
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* Description: |
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* enable clocking to the FSMC module |
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* |
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************************************************************************************/ |
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|
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void stm32_disablefsmc(void) |
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{ |
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uint32_t regval; |
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|
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/* Disable AHB clocking to the FSMC */ |
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|
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regval = getreg32(STM32_RCC_AHB3ENR); |
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regval &= ~RCC_AHB3ENR_FSMCEN; |
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putreg32(regval, STM32_RCC_AHB3ENR); |
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} |
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@ -0,0 +1,194 @@
@@ -0,0 +1,194 @@
|
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/************************************************************************************
|
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* configs/stm3240g-eval/src/up_selectsram.c |
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* arch/arm/src/board/up_selectsram.c |
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* |
||||
* 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 <stdint.h> |
||||
#include <debug.h> |
||||
|
||||
#include "chip.h" |
||||
#include "up_arch.h" |
||||
|
||||
#include "stm32.h" |
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#include "stm3240g-internal.h" |
||||
|
||||
#ifdef CONFIG_STM32_FSMC |
||||
|
||||
/************************************************************************************
|
||||
* Pre-processor Definitions |
||||
************************************************************************************/ |
||||
|
||||
#if STM32_NGPIO_PORTS < 6 |
||||
# error "Required GPIO ports not enabled" |
||||
#endif |
||||
|
||||
/* SRAM Timing */ |
||||
|
||||
#define SRAM_ADDRESS_SETUP_TIME 3 |
||||
#define SRAM_ADDRESS_HOLD_TIME 0 |
||||
#define SRAM_DATA_SETUP_TIME 6 |
||||
#define SRAM_BUS_TURNAROUND_DURATION 1 |
||||
#define SRAM_CLK_DIVISION 0 |
||||
#define SRAM_DATA_LATENCY 0 |
||||
|
||||
/* SRAM pin definitions */ |
||||
|
||||
#define SRAM_NADDRLINES 21 |
||||
#define SRAM_NDATALINES 16 |
||||
|
||||
/************************************************************************************
|
||||
* Public Data |
||||
************************************************************************************/ |
||||
|
||||
/************************************************************************************
|
||||
* Private Data |
||||
************************************************************************************/ |
||||
/* GPIOs Configuration **************************************************************
|
||||
* PD0 <-> FSMC_D2 PE0 <-> FSMC_NBL0 PF0 <-> FSMC_A0 PG0 <-> FSMC_A10 |
||||
* PD1 <-> FSMC_D3 PE1 <-> FSMC_NBL1 PF1 <-> FSMC_A1 PG1 <-> FSMC_A11 |
||||
* PD4 <-> FSMC_NOE PE3 <-> FSMC_A19 PF2 <-> FSMC_A2 PG2 <-> FSMC_A12 |
||||
* PD5 <-> FSMC_NWE PE4 <-> FSMC_A20 PF3 <-> FSMC_A3 PG3 <-> FSMC_A13 |
||||
* PD8 <-> FSMC_D13 PE7 <-> FSMC_D4 PF4 <-> FSMC_A4 PG4 <-> FSMC_A14 |
||||
* PD9 <-> FSMC_D14 PE8 <-> FSMC_D5 PF5 <-> FSMC_A5 PG5 <-> FSMC_A15 |
||||
* PD10 <-> FSMC_D15 PE9 <-> FSMC_D6 PF12 <-> FSMC_A6 PG9 <-> FSMC_NE2 |
||||
* PD11 <-> FSMC_A16 PE10 <-> FSMC_D7 PF13 <-> FSMC_A7 |
||||
* PD12 <-> FSMC_A17 PE11 <-> FSMC_D8 PF14 <-> FSMC_A8 |
||||
* PD13 <-> FSMC_A18 PE12 <-> FSMC_D9 PF15 <-> FSMC_A9 |
||||
* PD14 <-> FSMC_D0 PE13 <-> FSMC_D10 |
||||
* PD15 <-> FSMC_D1 PE14 <-> FSMC_D11 |
||||
* PE15 <-> FSMC_D12 |
||||
*/ |
||||
|
||||
/* GPIO configurations unique to SRAM */ |
||||
|
||||
static const uint32_t g_sramconfig[] = |
||||
{ |
||||
/* NE3, NBL0, NBL1, */ |
||||
|
||||
GPIO_FSMC_NOE, GPIO_FSMC_NWE, GPIO_FSMC_NBL0, GPIO_FSMC_NBL1, GPIO_FSMC_NE2 |
||||
}; |
||||
#define NSRAM_CONFIG (sizeof(g_sramconfig)/sizeof(uint16_t)) |
||||
|
||||
/************************************************************************************
|
||||
* Private Functions |
||||
************************************************************************************/ |
||||
|
||||
/************************************************************************************
|
||||
* Public Functions |
||||
************************************************************************************/ |
||||
|
||||
/************************************************************************************
|
||||
* Name: stm32_selectsram |
||||
* |
||||
* Description: |
||||
* Initialize to access external SRAM. SRAM will be visible at the FSMC Bank
|
||||
* NOR/SRAM2 base address (0x64000000) |
||||
* |
||||
* General transaction rules. The requested AHB transaction data size can be 8-, |
||||
* 16- or 32-bit wide whereas the SRAM has a fixed 16-bit data width. Some simple |
||||
* transaction rules must be followed: |
||||
* |
||||
* Case 1: AHB transaction width and SRAM data width are equal |
||||
* There is no issue in this case. |
||||
* Case 2: AHB transaction size is greater than the memory size |
||||
* In this case, the FSMC splits the AHB transaction into smaller consecutive |
||||
* memory accesses in order to meet the external data width. |
||||
* Case 3: AHB transaction size is smaller than the memory size. |
||||
* SRAM supports the byte select feature. |
||||
* a) FSMC allows write transactions accessing the right data through its |
||||
* byte lanes (NBL[1:0]) |
||||
* b) Read transactions are allowed (the controller reads the entire memory |
||||
* word and uses the needed byte only). The NBL[1:0] are always kept low |
||||
* during read transactions. |
||||
* |
||||
************************************************************************************/ |
||||
|
||||
void stm32_selectsram(void) |
||||
{ |
||||
/* Configure new GPIO pins */ |
||||
|
||||
stm32_extmemaddr(SRAM_NADDRLINES); /* Common address lines: A0-A20 */ |
||||
stm32_extmemdata(SRAM_NDATALINES); /* Common data lines: D0-D15 */ |
||||
stm32_extmemgpios(g_sramconfig, NSRAM_CONFIG); /* SRAM-specific control lines */ |
||||
|
||||
/* Enable AHB clocking to the FSMC */ |
||||
|
||||
stm32_enablefsmc(); |
||||
|
||||
/* Bank1 NOR/SRAM control register configuration
|
||||
* |
||||
* Bank enable : Not yet |
||||
* Data address mux : Disabled |
||||
* Memory Type : PSRAM |
||||
* Data bus width : 16-bits |
||||
* Flash access : Disabled |
||||
* Burst access mode : Disabled |
||||
* Polarity : Low |
||||
* Wrapped burst mode : Disabled |
||||
* Write timing : Before state |
||||
* Write enable : Yes |
||||
* Wait signal : Disabled |
||||
* Extended mode : Disabled |
||||
* Asynchronous wait : Disabled |
||||
* Write burst : Disabled |
||||
*/ |
||||
|
||||
putreg32((FSMC_BCR_PSRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN), STM32_FSMC_BCR2); |
||||
|
||||
/* Bank1 NOR/SRAM timing register configuration */ |
||||
|
||||
putreg32((FSMC_BTR_ADDSET(SRAM_ADDRESS_SETUP_TIME) | FSMC_BTR_ADDHLD(SRAM_ADDRESS_HOLD_TIME) | |
||||
FSMC_BTR_DATAST(SRAM_DATA_SETUP_TIME) | FSMC_BTR_BUSTRUN(SRAM_BUS_TURNAROUND_DURATION) | |
||||
FSMC_BTR_CLKDIV(SRAM_CLK_DIVISION) | FSMC_BTR_DATLAT(SRAM_DATA_LATENCY) | |
||||
FSMC_BTR_ACCMODA), |
||||
STM32_FSMC_BTR2); |
||||
|
||||
/* Bank1 NOR/SRAM timing register for write configuration, if extended mode is used */ |
||||
|
||||
putreg32(0xffffffff, STM32_FSMC_BWTR2); /* Extended mode not used */ |
||||
|
||||
/* Enable the bank */ |
||||
|
||||
putreg32((FSMC_BCR_MBKEN | FSMC_BCR_PSRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN), STM32_FSMC_BCR2); |
||||
} |
||||
|
||||
#endif /* CONFIG_STM32_FSMC */ |
||||
|
||||
|
||||
Loading…
Reference in new issue