start to add lwip support

2013-09-14 15:24:59 +07:00
parent e32e901cd1
commit 0c97131149
151 changed files with 67847 additions and 30 deletions
@@ -0,0 +1,142 @@
+/**********************************************************************
+ * @brief	Setups up the LWIP timebase (tick)
+ *
+ * @note
+ * Copyright(C) NXP Semiconductors, 2012
+ * All rights reserved.
+ *
+ * @par
+ * Software that is described herein is for illustrative purposes only
+ * which provides customers with programming information regarding the
+ * LPC products.  This software is supplied "AS IS" without any warranties of
+ * any kind, and NXP Semiconductors and its licensor disclaim any and
+ * all warranties, express or implied, including all implied warranties of
+ * merchantability, fitness for a particular purpose and non-infringement of
+ * intellectual property rights.  NXP Semiconductors assumes no responsibility
+ * or liability for the use of the software, conveys no license or rights under any
+ * patent, copyright, mask work right, or any other intellectual property rights in
+ * or to any products. NXP Semiconductors reserves the right to make changes
+ * in the software without notification. NXP Semiconductors also makes no
+ * representation or warranty that such application will be suitable for the
+ * specified use without further testing or modification.
+ *
+ * @par
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation is hereby granted, under NXP Semiconductors' and its
+ * licensor's relevant copyrights in the software, without fee, provided that it
+ * is used in conjunction with NXP Semiconductors microcontrollers.  This
+ * copyright, permission, and disclaimer notice must appear in all copies of
+ * this code.
+ */
+
+#include "lwip/opt.h"
+
+#if NO_SYS == 1
+
+#include "chip.h"
+#include "lpc_arch.h"
+
+/** @ingroup NET_LWIP_ARCH
+ * @{
+ */
+
+/*****************************************************************************
+ * Private types/enumerations/variables
+ ****************************************************************************/
+
+/* Saved reference period foe standalone mode */
+static uint32_t saved_period;
+
+/* Saved total time in mS since timer was enabled */
+static volatile u32_t systick_timems;
+
+/*****************************************************************************
+ * Public types/enumerations/variables
+ ****************************************************************************/
+
+/* Current system clock rate, mainly used for sysTick */
+extern uint32_t SystemCoreClock;
+
+/*****************************************************************************
+ * Private functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Public functions
+ ****************************************************************************/
+
+/* Enable LWIP tick and interrupt */
+void SysTick_Enable(uint32_t period)
+{
+	/* Initialize System Tick with time interval */
+//	SYSTICK_InternalInit(period); // FIXME
+//	saved_period = period; // FIXME
+//	systick_timems = 0; // FIXME
+
+	/* Enable System Tick interrupt */
+//	SYSTICK_IntCmd(ENABLE); // FIXME
+
+	/* Enable System Tick Counter */
+//	SYSTICK_Cmd(ENABLE); // FIXME
+
+	saved_period = period;
+	SysTick_Config((SystemCoreClock * period) / 1000);
+}
+
+/* Disable LWIP tick */
+void SysTick_Disable(void)
+{
+	/* Disable System Tick Counter */
+//	SYSTICK_Cmd(DISABLE); // FIXME
+
+	/* Disable System Tick interrupt */
+//	SYSTICK_IntCmd(DISABLE); // FIXME
+
+	SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
+}
+
+/**
+ * @brief	SysTick IRQ handler and timebase management
+ * @return	Nothing
+ * @note	This function keeps a timebase for LWIP that can be
+ * used for other functions.
+ */
+void SysTick_Handler(void)
+{
+	/* Clear System Tick counter flag */
+//	SYSTICK_ClearCounterFlag(); // FIXME
+
+	/* Increment tick count */
+	systick_timems += saved_period;
+}
+
+
+/* Get the current systick time in milliSeconds */
+uint32_t SysTick_GetMS(void)
+{
+	return systick_timems;
+}
+
+/* Delay for the specified number of milliSeconds */
+void msDelay(uint32_t ms)
+{
+	uint32_t to = ms + systick_timems;
+
+	while (to > systick_timems) {}
+}
+
+/**
+ * @brief	LWIP standalone mode time support
+ * @return	Returns the current time in mS
+ * @note	Returns the current time in mS. This is needed for the LWIP timers
+ */
+u32_t sys_now(void)
+{
+	return (u32_t) SysTick_GetMS();
+}
+
+/**
+ * @}
+ */
+
+#endif /* NO_SYS == 1 */