diff options
author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-03-10 00:15:45 +0000 |
---|---|---|
committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-03-10 00:15:45 +0000 |
commit | e6840f34ca8b0ec6764ff13da7c5e7d7fdee9beb (patch) | |
tree | bc6c3135f9f82e6fefbd1408a4a0dc9e149d4a7a /nuttx/configs/stm3220g-eval/src/up_adc.c | |
parent | ebe8678619fe7bca2fd4f65830192a7559af46c3 (diff) | |
download | px4-nuttx-e6840f34ca8b0ec6764ff13da7c5e7d7fdee9beb.tar.gz px4-nuttx-e6840f34ca8b0ec6764ff13da7c5e7d7fdee9beb.tar.bz2 px4-nuttx-e6840f34ca8b0ec6764ff13da7c5e7d7fdee9beb.zip |
Add support for the STM3220G-EVAL board
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4472 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/configs/stm3220g-eval/src/up_adc.c')
-rw-r--r-- | nuttx/configs/stm3220g-eval/src/up_adc.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/nuttx/configs/stm3220g-eval/src/up_adc.c b/nuttx/configs/stm3220g-eval/src/up_adc.c new file mode 100644 index 000000000..c1563c4bc --- /dev/null +++ b/nuttx/configs/stm3220g-eval/src/up_adc.c @@ -0,0 +1,168 @@ +/************************************************************************************ + * configs/stm3220g-eval/src/up_adc.c + * arch/arm/src/board/up_adc.c + * + * Copyright (C) 2011-2012 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 <errno.h> +#include <debug.h> + +#include <nuttx/analog/adc.h> +#include <arch/board/board.h> + +#include "chip.h" +#include "up_arch.h" + +#include "stm32_pwm.h" +#include "stm3220g-internal.h" + +#ifdef CONFIG_ADC + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/* Configuration ************************************************************/ +/* Up to 3 ADC interfaces are supported */ + +#if STM32_NADC < 3 +# undef CONFIG_STM32_ADC3 +#endif + +#if STM32_NADC < 2 +# undef CONFIG_STM32_ADC2 +#endif + +#if STM32_NADC < 1 +# undef CONFIG_STM32_ADC1 +#endif + +#if defined(CONFIG_STM32_ADC1) || defined(CONFIG_STM32_ADC2) || defined(CONFIG_STM32_ADC3) +#ifndef CONFIG_STM32_ADC3 +# warning "Channel information only available for ADC3" +#endif + +/* The number of ADC channels in the conversion list */ + +#define ADC3_NCHANNELS 1 + +/************************************************************************************ + * Private Data + ************************************************************************************/ +/* The STM3220G-EVAL has a 10 Kohm potentiometer RV1 connected to PF9 of + * STM32F207IGH6 on the board: TIM14_CH1/FSMC_CD/ADC3_IN7 + */ + +/* Identifying number of each ADC channel: Variable Resistor. */ + +#ifdef CONFIG_STM32_ADC3 +static const uint8_t g_chanlist[ADC3_NCHANNELS] = {7}; + +/* Configurations of pins used byte each ADC channels */ + +static const uint32_t g_pinlist[ADC3_NCHANNELS] = {GPIO_ADC3_IN7}; +#endif + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: adc_devinit + * + * Description: + * All STM32 architectures must provide the following interface to work with + * examples/adc. + * + ************************************************************************************/ + +int adc_devinit(void) +{ +#ifdef CONFIG_STM32_ADC3 + static bool initialized = false; + struct adc_dev_s *adc; + int ret; + int i; + + /* Check if we have already initialized */ + + if (!initialized) + { + /* Configure the pins as analog inputs for the selected channels */ + + for (i = 0; i < ADC3_NCHANNELS; i++) + { + stm32_configgpio(g_pinlist[i]); + } + + /* Call stm32_adcinitialize() to get an instance of the ADC interface */ + + adc = stm32_adcinitialize(3, g_chanlist, ADC3_NCHANNELS); + if (adc == NULL) + { + adbg("ERROR: Failed to get ADC interface\n"); + return -ENODEV; + } + + /* Register the ADC driver at "/dev/adc0" */ + + ret = adc_register("/dev/adc0", adc); + if (ret < 0) + { + adbg("adc_register failed: %d\n", ret); + return ret; + } + + /* Now we are initialized */ + + initialized = true; + } + + return OK; +#else + return -ENOSYS; +#endif +} + +#endif /* CONFIG_STM32_ADC1 || CONFIG_STM32_ADC2 || CONFIG_STM32_ADC3 */ +#endif /* CONFIG_ADC */
\ No newline at end of file |