Add beginning of Kinetis pin interrupt/dma logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3880 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 151 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/kinetis/kinetis_pingpio.c b/nuttx/arch/arm/src/kinetis/kinetis_pingpio.c
new file mode 100644
index 000000000..23829c6d7
--- /dev/null
+++ b/nuttx/arch/arm/src/kinetis/kinetis_pingpio.c
@@ -0,0 +1,151 @@
+/****************************************************************************
+ *  arch/arm/src/kinetis/kinetis_pingpio.c
+ *
+ *   Copyright (C) 2011 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 <arch/board/board.h>
+
+#include <assert.h>
+#include <errno.h>
+
+#include <nuttx/arch.h>
+
+#include "up_arch.h"
+#include "up_internal.h"
+
+#include "kinetis_memorymap.h"
+#include "kinetis_internal.h"
+#include "kinetis_gpio.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kinetis_gpiowrite
+ *
+ * Description:
+ *   Write one or zero to the selected GPIO pin
+ *
+ ****************************************************************************/
+
+void kinetis_gpiowrite(uint32_t pinset, bool value)
+{
+  uintptr_t    base;
+  unsigned int port;
+  unsigned int pin;
+
+  DEBUGASSERT((pinset & _PIN_MODE_MASK) == _PIN_MODE_GPIO);
+  DEBUGASSERT((pinset & _PIN_IO_MASK) == _PIN_OUTPUT);
+
+  /* Get the port number and pin number */
+
+  port = (pinset & _PIN_PORT_MASK) >> _PIN_PORT_SHIFT;
+  pin  = (pinset & _PIN_MASK)      >> _PIN_SHIFT;
+
+  DEBUGASSERT(port < KINETIS_NPORTS);
+  if (port < KINETIS_NPORTS)
+    {
+      /* Get the base address of GPIO block for this port */
+
+      base = KINETIS_GPIO_BASE(port);
+
+      /* Set or clear the output */
+
+      if (value)
+        {
+          putreg32((1 << pin), base + KINETIS_GPIO_PSOR_OFFSET);
+        }
+      else
+        {
+          putreg32((1 << pin), base + KINETIS_GPIO_PCOR_OFFSET);
+        }
+    }
+}
+
+/****************************************************************************
+ * Name: kinetis_gpioread
+ *
+ * Description:
+ *   Read one or zero from the selected GPIO pin
+ *
+ ****************************************************************************/
+
+bool kinetis_gpioread(uint32_t pinset)
+{
+  uintptr_t    base;
+  uint32_t     regval;
+  unsigned int port;
+  unsigned int pin;
+  bool         ret = false;
+
+  DEBUGASSERT((pinset & _PIN_MODE_MASK) == _PIN_MODE_GPIO);
+  DEBUGASSERT((pinset & _PIN_IO_MASK) == _PIN_INPUT);
+
+  /* Get the port number and pin number */
+
+  port = (pinset & _PIN_PORT_MASK) >> _PIN_PORT_SHIFT;
+  pin  = (pinset & _PIN_MASK)      >> _PIN_SHIFT;
+
+  DEBUGASSERT(port < KINETIS_NPORTS);
+  if (port < KINETIS_NPORTS)
+    {
+      /* Get the base address of GPIO block for this port */
+
+      base = KINETIS_GPIO_BASE(port);
+
+      /* return the state of the pin */
+
+      regval = getreg32(base + KINETIS_GPIO_PDIR_OFFSET);
+      ret    = ((regval & (1 << pin)) != 0);
+    }
+  return ret;
+}
+