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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-04-10 22:07:20 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-04-10 22:07:20 +0000 |
commit | 7b7fc55ce2dcc9adae56185d40e62e6c2276c98f (patch) | |
tree | 759bc03e7ba223c70abd7c3311ed3ffadf168bbb /nuttx/arch/arm/src/imx/imx_gpio.c | |
parent | 6a80bc8280dfdd98426010f986928a142debddfd (diff) | |
download | px4-nuttx-7b7fc55ce2dcc9adae56185d40e62e6c2276c98f.tar.gz px4-nuttx-7b7fc55ce2dcc9adae56185d40e62e6c2276c98f.tar.bz2 px4-nuttx-7b7fc55ce2dcc9adae56185d40e62e6c2276c98f.zip |
Basic i.MX1 low-level boot
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1695 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/imx/imx_gpio.c')
-rw-r--r-- | nuttx/arch/arm/src/imx/imx_gpio.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/imx/imx_gpio.c b/nuttx/arch/arm/src/imx/imx_gpio.c new file mode 100644 index 000000000..889faaf81 --- /dev/null +++ b/nuttx/arch/arm/src/imx/imx_gpio.c @@ -0,0 +1,110 @@ +/**************************************************************************** + * arch/arm/src/imx/imx_gpio.c + * arch/arm/src/chip/imx_gpio.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <sys/types.h> + +#include "up_arch.h" +#include "imx_gpio.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Funtions + ****************************************************************************/ + +/**************************************************************************** + * Name: imxgpio_configoutput + ****************************************************************************/ + +void imxgpio_configoutput(int port, int bit, int value) +{ + imxgpio_configinput(port, bit); /* Same as input except: */ + imxgpio_dirout(GPIOA, 2); /* Output */ + + if (value) + { + imxgpio_setoutput(GPIOA, 2); /* Set output = 1 */ + } + else + { + imxgpio_clroutput(GPIOA, 2); /* Set output = 0 */ + } +} + +/**************************************************************************** + * Name: imxgpio_configinput + ****************************************************************************/ + +void imxgpio_configinput(int port, int bit) +{ + imxgpio_pullupdisable(GPIOA, 2); /* No pullup */ + imxgpio_dirin(GPIOA, 2); /* Input */ + imxgpio_gpiofunc(GPIOA, 2); /* Use as GPIO */ + imxgpio_primaryperipheralfunc(GPIOA, 2); /* Not necessary */ + imxgpio_ocrain(GPIOA, 2); /* Output AIN */ + imxgpio_aoutgpio(GPIOA, 2); /* AOUT input is GPIO */ + imxgpio_boutgpio(GPIOA, 2); /* BOUT input is GPIO */ +} + +/**************************************************************************** + * Name: imxgpio_configprimary + ****************************************************************************/ + +void imxgpio_configprimary(int port, int bit) +{ + imxgpio_configinput(port, bit); /* Same as input except: */ + imxgpio_peripheralfunc(GPIOA, 2); /* Use as peripheral */ + imxgpio_primaryperipheralfunc(GPIOA, 2); /* Primary function*/ +} |