ZKIT-ARM-1769 support for ADC and DAC from Rashid

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5723 42af7a65-404d-4744-a932-0658087f49c3

arch/arm/src/lpc17xx/lpc17_adc.c

@@ -7,7 +7,7 @@
  * 
  * This file is a part of NuttX:
  *
- *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2010, 2013 Gregory Nutt. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -66,6 +66,10 @@
 
 #if defined(CONFIG_LPC17_ADC)
 
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
 #ifndef CONFIG_ADC0_MASK
 #define CONFIG_ADC0_MASK     0x01
 #endif
@@ -108,7 +112,7 @@ static int  adc_interrupt(int irq, void *context);
 
 static const struct adc_ops_s g_adcops =
 {
-  .ao_reset =adc_reset,
+  .ao_reset    = adc_reset,
   .ao_setup    = adc_setup,
   .ao_shutdown = adc_shutdown,
   .ao_rxint    = adc_rxint,
@@ -125,22 +129,28 @@ static struct up_dev_s g_adcpriv =
 static struct adc_dev_s g_adcdev =
 {
   .ad_ops      = &g_adcops,
-  .ad_priv= &g_adcpriv,
+  .ad_priv     = &g_adcpriv,
 };
 
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
 
-/* Reset the ADC device.  Called early to initialize the hardware. This
+/****************************************************************************
- * is called, before ao_setup() and on error conditions.
+ * Name: adc_reset
- */
+ *
+ * Description:
+ *   Reset the ADC device.  Called early to initialize the hardware. This
+ *   is called, before adc_setup() and on error conditions.
+ *
+ ****************************************************************************/
 
 static void adc_reset(FAR struct adc_dev_s *dev)
 {
-  irqstate_t flags;
-  uint32_t regval;
   FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
+  irqstate_t flags;
+  uint32_t clkdiv;
+  uint32_t regval;
 
   flags = irqsave();
 
@@ -148,101 +158,166 @@ static void adc_reset(FAR struct adc_dev_s *dev)
   regval |= SYSCON_PCONP_PCADC;
   putreg32(regval, LPC17_SYSCON_PCONP);
 
-  putreg32(ADC_CR_PDN,LPC17_ADC_CR);
+  putreg32(ADC_CR_PDN, LPC17_ADC_CR);
 
   regval  = getreg32(LPC17_SYSCON_PCLKSEL0);
   regval &= ~SYSCON_PCLKSEL0_ADC_MASK;
   regval |= (SYSCON_PCLKSEL_CCLK8 << SYSCON_PCLKSEL0_ADC_SHIFT);
   putreg32(regval, LPC17_SYSCON_PCLKSEL0);
 
-  uint32_t clkdiv=LPC17_CCLK/8/65/priv->sps;
+  clkdiv   = LPC17_CCLK / 8 / 65 / priv->sps;
-  clkdiv<<=8;
+  clkdiv <<= 8;
-  clkdiv&=0xff00;
+  clkdiv  &= 0xff00;
-  putreg32(ADC_CR_PDN|ADC_CR_BURST|clkdiv|priv->mask,LPC17_ADC_CR);
+  putreg32(ADC_CR_PDN | ADC_CR_BURST | clkdiv | priv->mask, LPC17_ADC_CR);
 
-  if(priv->mask&0x01)
+  if ((priv->mask & 0x01) != 0)
+    {
       lpc17_configgpio(GPIO_AD0p0);
-  else if(priv->mask&0x02)
+    }
+  else if ((priv->mask & 0x02) != 0)
+    {
       lpc17_configgpio(GPIO_AD0p1);
-  else if(priv->mask&0x04)
+    }
+  else if ((priv->mask & 0x04) != 0)
+    {
       lpc17_configgpio(GPIO_AD0p2);
-  else if(priv->mask&0x08)
+    }
+  else if ((priv->mask & 0x08) != 0)
+    {
       lpc17_configgpio(GPIO_AD0p3);
-  else if(priv->mask&0x10)
+    }
+  else if ((priv->mask & 0x10) != 0)
+    {
       lpc17_configgpio(GPIO_AD0p4);
-  else if(priv->mask&0x20)
+    }
+  else if ((priv->mask & 0x20) != 0)
+    {
       lpc17_configgpio(GPIO_AD0p5);
-  else if(priv->mask&0x40)
+    }
+  else if ((priv->mask & 0x40) != 0)
+    {
       lpc17_configgpio(GPIO_AD0p6);
-  else if(priv->mask&0x80)
+    }
+  else if ((priv->mask & 0x80) != 0)
+    {
       lpc17_configgpio(GPIO_AD0p7);
+    }
     
   irqrestore(flags);
 }
 
-/* Configure the ADC. This method is called the first time that the ADC
+/****************************************************************************
+ * 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.
- */
+ *
+ ****************************************************************************/
 
 static int adc_setup(FAR struct adc_dev_s *dev)
 {
-  int i;
   FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
+  int i;
+
   int ret = irq_attach(priv->irq, adc_interrupt);
   if (ret == OK)
     {
       for (i = 0; i < 8; i++)
         {
-          priv->buf[i]=0;
+          priv->buf[i]   = 0;
-          priv->count[i]=0;
+          priv->count[i] = 0;
         }
+
       up_enable_irq(priv->irq);
     }
+
   return ret;
 }
 
-/* Disable the ADC.  This method is called when the ADC device is closed.
+/****************************************************************************
+ * 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.
- */
+ *
+ ****************************************************************************/
 
 static void adc_shutdown(FAR struct adc_dev_s *dev)
 {
   FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
+
+  /* Disable ADC interrupts, both at the level of the ADC device and at the
+   * level of the NVIC.
+   */
+
+  putreg32(0, LPC17_ADC_INTEN);
   up_disable_irq(priv->irq);
+
+  /* Then detach the ADC interrupt handler. */
+
   irq_detach(priv->irq);
 }
 
-/* Call to enable or disable RX interrupts */
+/****************************************************************************
+ * Name: adc_rxint
+ *
+ * Description:
+ *   Call to enable or disable RX interrupts
+ *
+ ****************************************************************************/
 
 static void adc_rxint(FAR struct adc_dev_s *dev, bool enable)
 {
   FAR struct up_dev_s *priv = (FAR struct up_dev_s *)dev->ad_priv;
+
   if (enable)
+    {
       putreg32(ADC_INTEN_GLOBAL, LPC17_ADC_INTEN);
+    }
   else
-    putreg32(0x00, LPC17_ADC_INTEN);
+    {
+      putreg32(0, LPC17_ADC_INTEN);
+    }
 }
 
-/* All ioctl calls will be routed through this method */
+/****************************************************************************
+ * Name: adc_ioctl
+ *
+ * Description:
+ *  All ioctl calls will be routed through this method
+ *
+ ****************************************************************************/
 
 static int adc_ioctl(FAR struct adc_dev_s *dev, int cmd, unsigned long arg)
 {
-  dbg("Fix me:Not Implemented\n");
+  /* No ioctl commands supported */
-  return 0;
+
+  return -ENOTTY;
 }
 
+/****************************************************************************
+ * Name: adc_interrupt
+ *
+ * Description:
+ *   ADC interrupt handler
+ *
+ ****************************************************************************/
+
 static int adc_interrupt(int irq, void *context)
 {
-  uint32_t regval;
   FAR struct up_dev_s *priv = (FAR struct up_dev_s *)g_adcdev.ad_priv;
+  uint32_t regval;
   unsigned char ch;
   int32_t value;
     
   regval              = getreg32(LPC17_ADC_GDR);
   ch                  = (regval >> 24) & 0x07;
   priv->buf[ch]      += regval & 0xfff0;
+
   priv->count[ch]++;
   if (priv->count[ch] >= CONFIG_ADC0_AVERAGE)
     {
@@ -252,6 +327,7 @@ static int adc_interrupt(int irq, void *context)
       priv->buf[ch]   = 0;
       priv->count[ch] = 0;
     }
+
   return OK;
 }
 
@@ -274,5 +350,5 @@ FAR struct adc_dev_s *lpc17_adcinitialize(void)
 {
   return &g_adcdev;
 }
-#endif
 
+#endif /* CONFIG_LPC17_ADC */

arch/arm/src/lpc17xx/lpc17_dac.c

@@ -62,6 +62,8 @@
 #include "chip.h"
 
 #include "chip/lpc17_syscon.h"
+#include "chip/lpc17_pinconfig.h"
+#include "lpc17_gpio.h"
 #include "lpc17_dac.h"
 
 #ifdef CONFIG_LPC17_DAC

configs/zkit-arm-1769/src/Makefile

@@ -51,6 +51,14 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += up_usbmsc.c
 endif
 
+ifeq ($(CONFIG_ADC),y)
+CSRCS += up_adc.c
+endif
+
+ifeq ($(CONFIG_DAC),y)
+CSRCS += up_dac.c
+endif
+
 ifeq ($(CONFIG_CAN),y)
 CSRCS += up_can.c
 endif

configs/zkit-arm-1769/src/up_adc.c

@@ -0,0 +1,123 @@
+/************************************************************************************
+ * configs/zkit-arm-1769/src/up_adc.c
+ * arch/arm/src/board/up_adc.c
+ *
+ *   Copyright (C) 2013 Zilogic Systems. All rights reserved.
+ *   Author: Kannan <code@nuttx.org>
+ *
+ * Based on configs/stm3220g-eval/src/up_adc.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 <errno.h>
+#include <debug.h>
+
+#include <nuttx/analog/adc.h>
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "up_arch.h"
+
+#include "lpc17_pwm.h"
+#include "zkitarm_internal.h"
+
+#ifdef CONFIG_ADC
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Data
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: adc_devinit
+ *
+ * Description:
+ *   All LPC17 architectures must provide the following interface to work with
+ *   examples/adc.
+ *
+ ************************************************************************************/
+
+int adc_devinit(void)
+{
+  static bool initialized = false;
+  struct adc_dev_s *adc;
+  int ret;
+
+  /* Check if we have already initialized */
+
+  if (!initialized)
+    {
+      /* Call lpc17_adcinitialize() to get an instance of the ADC interface */
+
+      adc = lpc17_adcinitialize();
+      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;
+}
+
+#endif /* CONFIG_ADC */

configs/zkit-arm-1769/src/up_dac.c

@@ -0,0 +1,100 @@
+/************************************************************************************
+ * configs/zkit-arm-1769/src/up_dac.c
+ * arch/arm/src/board/up_dac.c
+ *
+ *   Copyright (C) 2013 Zilogic Systems. All rights reserved.
+ *   Author: Kannan <code@nuttx.org>
+ *
+ * Based on configs/stm3220g-eval/src/up_dac.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 <errno.h>
+#include <debug.h>
+
+#include <nuttx/analog/dac.h>
+#include <arch/board/board.h>
+
+#include "up_arch.h"
+#include "up_internal.h"
+
+#include "zkitarm_internal.h"
+
+#ifdef CONFIG_DAC
+
+/************************************************************************************
+ * Name: dac_devinit
+ *
+ * Description:
+ *   All LPC17xx architectures must provide the following interface to work with
+ *   examples/diag.
+ *
+ ************************************************************************************/
+
+int dac_devinit(void)
+{
+  static bool initialized = false;
+  struct dac_dev_s *dac;
+  int ret;
+
+  if (!initialized)
+  {
+    /* Call lpc17_dacinitialize() to get an instance of the dac interface */
+
+    dac = lpc17_dacinitialize();
+    if (dac == NULL)
+      {
+        adbg("ERROR: Failed to get dac interface\n");
+        return -ENODEV;
+      }
+
+    ret = dac_register("/dev/dac0", dac);
+    if (ret < 0)
+      {
+        adbg("dac_register failed: %d\n", ret);
+        return ret;
+      }
+
+    initialized = true;
+  }
+
+  return OK;
+}
+
+#endif /* CONFIG_DAC */