From 2dad881e22746b8c56e97757e9fcb3928d196bd4 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Mon, 23 Jun 2014 12:13:52 -0600
Subject: Add support for the LPCXpresso's RTC, ADC, DAC, Timer, PWM, and
 MCPWM.  All form Max

---
 nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c | 152 ++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c

(limited to 'nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c')

diff --git a/nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c b/nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c
new file mode 100644
index 000000000..88741fd0d
--- /dev/null
+++ b/nuttx/configs/lpcxpresso-lpc1768/src/up_pwm.c
@@ -0,0 +1,152 @@
+/************************************************************************************
+ * configs/lpcexpresso-lpc1768/up_pwm.c
+ *
+ *   Copyright (C) 2014 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 <sys/types.h>
+
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/pwm.h>
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "up_arch.h"
+#include "lpc17_pwm.h"
+#include "lpc17_timer.h"
+#include "lpcxpresso_internal.h"
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+#ifdef CONFIG_PWM
+
+FAR struct pwm_lowerhalf_s *lpc17_pwminitialize(int timer);
+FAR struct pwm_lowerhalf_s *lpc17_mcpwminitialize(int timer);
+FAR struct pwm_lowerhalf_s *lpc17_timerinitialize(int timer);
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: pwm_devinit
+ *
+ * Description:
+ *   All LPC17 architectures must provide the following interface to work with
+ *   examples/pwm.
+ *
+ ************************************************************************************/
+
+int pwm_devinit(void)
+{
+  static bool initialized = false;
+  struct pwm_lowerhalf_s *pwm;
+  struct pwm_lowerhalf_s *mcpwm;
+  struct pwm_lowerhalf_s *timer;
+  int ret;
+
+  /* Have we already initialized? */
+
+  if (!initialized)
+    {
+      /* Call lpc17_pwminitialize() to get an instance of the PWM interface */
+
+      pwm = lpc17_pwminitialize(0);
+      if (!pwm)
+        {
+          adbg("Failed to get the LPC17XX PWM lower half\n");
+          return -ENODEV;
+        }
+
+      /* Register the PWM driver at "/dev/pwm0" */
+
+      ret = pwm_register("/dev/pwm0", pwm);
+      if (ret < 0)
+        {
+          adbg("pwm_register failed: %d\n", ret);
+          return ret;
+        }
+
+      mcpwm = lpc17_mcpwminitialize(0);
+      if (!mcpwm)
+        {
+          adbg("Failed to get the LPC17XX MOTOR PWM lower half\n");
+          return -ENODEV;
+        }
+
+      /* Register the MOTOR CONTROL PWM driver at "/dev/mcpwm0" */
+
+      ret = pwm_register("/dev/mcpwm0", mcpwm);
+      if (ret < 0)
+        {
+          adbg("mcpwm_register failed: %d\n", ret);
+          return ret;
+        }
+
+      timer = lpc17_timerinitialize(0);
+      if (!timer)
+        {
+          adbg("Failed to get the LPC17XX TIMER lower half\n");
+          return -ENODEV;
+        }
+
+      /* Register the PWM driver at "/dev/timer0" */
+
+      ret = pwm_register("/dev/timer0", timer);
+      if (ret < 0)
+        {
+          adbg("timer_register failed: %d\n", ret);
+          return ret;
+        }
+
+      /* Now we are initialized */
+
+      initialized = true;
+    }
+
+  return OK;
+}
+
+#endif /* CONFIG_PWM */
-- 
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