From 94ca4e731c42413360ea2b91f571d6421da5a7df Mon Sep 17 00:00:00 2001 From: patacongo Date: Mon, 12 Dec 2011 01:04:53 +0000 Subject: Add a skeleton for an STM32 ADC driver git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4162 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/arch/arm/src/stm32/stm32_adc.c | 382 +++++++++++++++++++++++++++++++++++ 1 file changed, 382 insertions(+) create mode 100644 nuttx/arch/arm/src/stm32/stm32_adc.c (limited to 'nuttx/arch/arm/src/stm32/stm32_adc.c') diff --git a/nuttx/arch/arm/src/stm32/stm32_adc.c b/nuttx/arch/arm/src/stm32/stm32_adc.c new file mode 100644 index 000000000..db88fa881 --- /dev/null +++ b/nuttx/arch/arm/src/stm32/stm32_adc.c @@ -0,0 +1,382 @@ +/**************************************************************************** + * arch/arm/src/stm32/stm32_adc.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Li Zhuoyi + * + * 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 +#include +#include +#include + +#include +#include +#include + +#include "up_internal.h" +#include "up_arch.h" + +#include "chip.h" +#include "stm32_internal.h" +#include "stm32_adc.h" + +#ifdef CONFIG_ADC + +/**************************************************************************** + * Pre-processor 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) + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct stm32_dev_s +{ + int irq; +# warning "Missing logic" +}; + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ +/* ADC Interrupt Handler */ + +static int adc_interrupt(int irq, void *context); + +/* ADC Driver Methods */ + +static void adc_reset(FAR struct adc_dev_s *dev); +static int adc_setup(FAR struct adc_dev_s *dev); +static void adc_shutdown(FAR struct adc_dev_s *dev); +static void adc_rxint(FAR struct adc_dev_s *dev, bool enable); +static int adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg); +static int adc_interrupt(int irq, void *context); + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static const struct adc_ops_s g_adcops = +{ + .ao_reset = adc_reset, + .ao_setup = adc_setup, + .ao_shutdown = adc_shutdown, + .ao_rxint = adc_rxint, + .ao_ioctl = adc_ioctl, +}; + +#ifdef CONFIG_STM32_ADC1 +static struct stm32_dev_s g_adcpriv1 = +{ +#ifdef CONFIG_STM32_STM32F10XX + .irq = STM32_IRQ_ADC12; +#else + .irq = STM32_IRQ_ADC; +#endif +# warning "Missing logic" +}; + +static struct adc_dev_s g_adcdev1 = +{ + .ad_ops = &g_adcops, + .ad_priv= &g_adcpriv1 +}; +#endif + +#ifdef CONFIG_STM32_ADC2 +static struct stm32_dev_s g_adcpriv2 = +{ +#ifdef CONFIG_STM32_STM32F10XX + .irq = STM32_IRQ_ADC12; +#else + .irq = STM32_IRQ_ADC; +#endif +# warning "Missing logic" +}; + +static struct adc_dev_s g_adcdev2 = +{ + .ad_ops = &g_adcops + .ad_priv= &g_adcpriv2 +}; + +#endif + +#ifdef CONFIG_STM32_ADC3 +static struct stm32_dev_s g_adcpriv3 = +{ +#ifdef CONFIG_STM32_STM32F10XX + .irq = STM32_IRQ_ADC3; +#else + .irq = STM32_IRQ_ADC; +#endif +# warning "Missing logic" +}; + +static struct adc_dev_s g_adcdev3 = +{ + .ad_ops = &g_adcops, + .ad_priv= &g_adcpriv3 +}; + +#endif + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: adc_interrupt + * + * Description: + * ADC interrupt handler. + * + * Input Parameters: + * + * Returned Value: + * + ****************************************************************************/ + +static int adc_interrupt(int irq, void *context) +{ + FAR struct stm32_dev_s *priv; + uint32_t regval; + + /* Determine which ADC caused the interrupt */ +# warning "Missing logic" + + /* Handle the ADC interrupt */ +# warning "Missing logic" + return OK; +} + +/**************************************************************************** + * Name: adc_reset + * + * Description: + * Reset the ADC device. Called early to initialize the hardware. This + * is called, before ao_setup() and on error conditions. + * + * Input Parameters: + * + * Returned Value: + * + ****************************************************************************/ + +static void adc_reset(FAR struct adc_dev_s *dev) +{ + FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv; + irqstate_t flags; + uint32_t regval; + + flags = irqsave(); + +# warning "Missing logic" + + irqrestore(flags); +} + +/**************************************************************************** + * Name: adc_setup + * + * Description: + * Configure the ADC. This method is called the first time that the ADC + * device is opened. This will occur when the port is first opened. + * This setup includes configuring and attaching ADC interrupts. Interrupts + * are all disabled upon return. + * + * Input Parameters: + * + * Returned Value: + * + ****************************************************************************/ + +static int adc_setup(FAR struct adc_dev_s *dev) +{ + FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv; + int ret; + + /* Attach the ADC interrupt */ + + ret = irq_attach(priv->irq, adc_interrupt); + if (ret == OK) + { + /* Initialize the ADC data structures */ +#warning "Missing logic" + + /* Enable the ADC interrupt */ + + up_enable_irq(priv->irq); + } + return ret; +} + +/**************************************************************************** + * Name: adc_shutdown + * + * Description: + * Disable the ADC. This method is called when the ADC device is closed. + * This method reverses the operation the setup method. + * + * Input Parameters: + * + * Returned Value: + * + ****************************************************************************/ + +static void adc_shutdown(FAR struct adc_dev_s *dev) +{ + FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv; + + /* Disable ADC interrupts and detach the ADC interrupt handler */ + + up_disable_irq(priv->irq); + irq_detach(priv->irq); + + /* Disable and reset the ADC module */ +#warning "Missing logic" +} + +/**************************************************************************** + * Name: adc_rxint + * + * Description: + * Call to enable or disable RX interrupts. + * + * Input Parameters: + * + * Returned Value: + * + ****************************************************************************/ + +static void adc_rxint(FAR struct adc_dev_s *dev, bool enable) +{ + FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv; + + if (enable) + { +#warning "Missing logic" + } + else + { +#warning "Missing logic" + } +} + +/**************************************************************************** + * Name: adc_ioctl + * + * Description: + * All ioctl calls will be routed through this method. + * + * Input Parameters: + * + * Returned Value: + * + ****************************************************************************/ + +static int adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg) +{ + return -ENOTTY; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_adcinitialize + * + * Description: + * Initialize the adc + * + * Returned Value: + * Valid can device structure reference on succcess; a NULL on failure + * + ****************************************************************************/ + +struct adc_dev_s *up_adcinitialize(int intf) +{ +#ifdef CONFIG_STM32_ADC1 + if (intf == 1) + { + return &g_adcdev1; + } + else +#endif +#ifdef CONFIG_STM32_ADC2 + if (intf == 2) + { + return &g_adcdev2; + } + else +#endif +#ifdef CONFIG_STM32_ADC3 + if (intf == 3) + { + return &g_adcdev3; + } + else +#endif + { + return NULL; + } +} + +#endif /* CONFIG_STM32_ADC || CONFIG_STM32_ADC2 || CONFIG_STM32_ADC3 */ +#endif /* CONFIG_ADC */ + -- cgit v1.2.3