LPC1700CMSIS_Lib - Date: March 20, 2011 This library is created f…

Users » frank26080115 » Code » LPC1700CMSIS_Lib

Date: March 20, 2011 This library is created from "LPC17xx CMSIS-Compliant Standard Peripheral Firmware Driver Library (GNU, Keil, IAR) (Jan 28, 2011)", available from NXP's website, under "All microcontrollers support documents" [[http://ics.nxp.com/support/documents/microcontrollers/?type=software]] You will need to follow [[/projects/libraries/svn/mbed/trunk/LPC1768/LPC17xx.h]] while using this library Examples provided here [[/users/frank26080115/programs/LPC1700CMSIS_Examples/]] The beautiful thing is that NXP does not place copyright protection on any of the files in here Only a few modifications are made to make it compile with the mbed online compiler, I fixed some warnings as well. This is untested as of March 20, 2011 Forum post about this library: [[/forum/mbed/topic/2030/]]

lpc17xx_wdt.c@0:84d7747641aa, 2011-03-20 (annotated)

Committer:: frank26080115
Date:: Sun Mar 20 18:45:15 2011 +0000
Revision:: 0:84d7747641aa

Who changed what in which revision?

User	Revision	Line number	New contents of line
frank26080115	0:84d7747641aa	1	/*********************************************************************//
frank26080115	0:84d7747641aa	2	* @file lpc17xx_wdt.c
frank26080115	0:84d7747641aa	3	* @brief Contains all functions support for WDT firmware library on LPC17xx
frank26080115	0:84d7747641aa	4	* @version 2.0
frank26080115	0:84d7747641aa	5	* @date 21. May. 2010
frank26080115	0:84d7747641aa	6	* @author NXP MCU SW Application Team
frank26080115	0:84d7747641aa	7	**************************************************************************
frank26080115	0:84d7747641aa	8	* Software that is described herein is for illustrative purposes only
frank26080115	0:84d7747641aa	9	* which provides customers with programming information regarding the
frank26080115	0:84d7747641aa	10	* products. This software is supplied "AS IS" without any warranties.
frank26080115	0:84d7747641aa	11	* NXP Semiconductors assumes no responsibility or liability for the
frank26080115	0:84d7747641aa	12	* use of the software, conveys no license or title under any patent,
frank26080115	0:84d7747641aa	13	* copyright, or mask work right to the product. NXP Semiconductors
frank26080115	0:84d7747641aa	14	* reserves the right to make changes in the software without
frank26080115	0:84d7747641aa	15	* notification. NXP Semiconductors also make no representation or
frank26080115	0:84d7747641aa	16	* warranty that such application will be suitable for the specified
frank26080115	0:84d7747641aa	17	* use without further testing or modification.
frank26080115	0:84d7747641aa	18	**********************************************************************/
frank26080115	0:84d7747641aa	19
frank26080115	0:84d7747641aa	20	/* Peripheral group ----------------------------------------------------------- */
frank26080115	0:84d7747641aa	21	/** @addtogroup WDT
frank26080115	0:84d7747641aa	22	* @{
frank26080115	0:84d7747641aa	23	*/
frank26080115	0:84d7747641aa	24
frank26080115	0:84d7747641aa	25	/* Includes ------------------------------------------------------------------- */
frank26080115	0:84d7747641aa	26	#include "lpc17xx_wdt.h"
frank26080115	0:84d7747641aa	27	#include "lpc17xx_clkpwr.h"
frank26080115	0:84d7747641aa	28	#include "lpc17xx_pinsel.h"
frank26080115	0:84d7747641aa	29
frank26080115	0:84d7747641aa	30
frank26080115	0:84d7747641aa	31	/* If this source file built with example, the LPC17xx FW library configuration
frank26080115	0:84d7747641aa	32	* file in each example directory ("lpc17xx_libcfg.h") must be included,
frank26080115	0:84d7747641aa	33	* otherwise the default FW library configuration file must be included instead
frank26080115	0:84d7747641aa	34	*/
frank26080115	0:84d7747641aa	35	#ifdef __BUILD_WITH_EXAMPLE__
frank26080115	0:84d7747641aa	36	#include "lpc17xx_libcfg.h"
frank26080115	0:84d7747641aa	37	#else
frank26080115	0:84d7747641aa	38	#include "lpc17xx_libcfg_default.h"
frank26080115	0:84d7747641aa	39	#endif /* __BUILD_WITH_EXAMPLE__ */
frank26080115	0:84d7747641aa	40
frank26080115	0:84d7747641aa	41
frank26080115	0:84d7747641aa	42	#ifdef _WDT
frank26080115	0:84d7747641aa	43
frank26080115	0:84d7747641aa	44	/* Private Functions ---------------------------------------------------------- */
frank26080115	0:84d7747641aa	45
frank26080115	0:84d7747641aa	46	static uint8_t WDT_SetTimeOut (uint8_t clk_source, uint32_t timeout);
frank26080115	0:84d7747641aa	47
frank26080115	0:84d7747641aa	48	/******************************************************************//
frank26080115	0:84d7747641aa	49	* @brief Set WDT time out value and WDT mode
frank26080115	0:84d7747641aa	50	* @param[in] clk_source select Clock source for WDT device
frank26080115	0:84d7747641aa	51	* @param[in] timeout value of time-out for WDT (us)
frank26080115	0:84d7747641aa	52	* @return None
frank26080115	0:84d7747641aa	53	*********************************************************************/
frank26080115	0:84d7747641aa	54	static uint8_t WDT_SetTimeOut (uint8_t clk_source, uint32_t timeout)
frank26080115	0:84d7747641aa	55	{
frank26080115	0:84d7747641aa	56
frank26080115	0:84d7747641aa	57	uint32_t pclk_wdt = 0;
frank26080115	0:84d7747641aa	58	uint32_t tempval = 0;
frank26080115	0:84d7747641aa	59
frank26080115	0:84d7747641aa	60	switch ((WDT_CLK_OPT) clk_source)
frank26080115	0:84d7747641aa	61	{
frank26080115	0:84d7747641aa	62	case WDT_CLKSRC_IRC:
frank26080115	0:84d7747641aa	63	pclk_wdt = 4000000;
frank26080115	0:84d7747641aa	64	// Calculate TC in WDT
frank26080115	0:84d7747641aa	65	tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4));
frank26080115	0:84d7747641aa	66	// Check if it valid
frank26080115	0:84d7747641aa	67	if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX))
frank26080115	0:84d7747641aa	68	{
frank26080115	0:84d7747641aa	69	LPC_WDT->WDTC = tempval;
frank26080115	0:84d7747641aa	70	return SUCCESS;
frank26080115	0:84d7747641aa	71	}
frank26080115	0:84d7747641aa	72
frank26080115	0:84d7747641aa	73	break;
frank26080115	0:84d7747641aa	74
frank26080115	0:84d7747641aa	75	case WDT_CLKSRC_PCLK:
frank26080115	0:84d7747641aa	76
frank26080115	0:84d7747641aa	77	// Get WDT clock with CCLK divider = 4
frank26080115	0:84d7747641aa	78	pclk_wdt = SystemCoreClock / 4;
frank26080115	0:84d7747641aa	79	// Calculate TC in WDT
frank26080115	0:84d7747641aa	80	tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4));
frank26080115	0:84d7747641aa	81
frank26080115	0:84d7747641aa	82	if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX))
frank26080115	0:84d7747641aa	83	{
frank26080115	0:84d7747641aa	84	CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_4);
frank26080115	0:84d7747641aa	85	LPC_WDT->WDTC = (uint32_t) tempval;
frank26080115	0:84d7747641aa	86	return SUCCESS;
frank26080115	0:84d7747641aa	87	}
frank26080115	0:84d7747641aa	88
frank26080115	0:84d7747641aa	89	// Get WDT clock with CCLK divider = 2
frank26080115	0:84d7747641aa	90	pclk_wdt = SystemCoreClock / 2;
frank26080115	0:84d7747641aa	91	// Calculate TC in WDT
frank26080115	0:84d7747641aa	92	tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4));
frank26080115	0:84d7747641aa	93
frank26080115	0:84d7747641aa	94	if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX))
frank26080115	0:84d7747641aa	95	{
frank26080115	0:84d7747641aa	96	CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_2);
frank26080115	0:84d7747641aa	97	LPC_WDT->WDTC = (uint32_t) tempval;
frank26080115	0:84d7747641aa	98	return SUCCESS;
frank26080115	0:84d7747641aa	99	}
frank26080115	0:84d7747641aa	100
frank26080115	0:84d7747641aa	101	// Get WDT clock with CCLK divider = 1
frank26080115	0:84d7747641aa	102	pclk_wdt = SystemCoreClock;
frank26080115	0:84d7747641aa	103	// Calculate TC in WDT
frank26080115	0:84d7747641aa	104	tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4));
frank26080115	0:84d7747641aa	105
frank26080115	0:84d7747641aa	106	if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX))
frank26080115	0:84d7747641aa	107	{
frank26080115	0:84d7747641aa	108	CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_1);
frank26080115	0:84d7747641aa	109	LPC_WDT->WDTC = (uint32_t) tempval;
frank26080115	0:84d7747641aa	110	return SUCCESS;
frank26080115	0:84d7747641aa	111	}
frank26080115	0:84d7747641aa	112	break ;
frank26080115	0:84d7747641aa	113
frank26080115	0:84d7747641aa	114
frank26080115	0:84d7747641aa	115	case WDT_CLKSRC_RTC:
frank26080115	0:84d7747641aa	116	pclk_wdt = 32768;
frank26080115	0:84d7747641aa	117	// Calculate TC in WDT
frank26080115	0:84d7747641aa	118	tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4));
frank26080115	0:84d7747641aa	119	// Check if it valid
frank26080115	0:84d7747641aa	120	if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX))
frank26080115	0:84d7747641aa	121	{
frank26080115	0:84d7747641aa	122	LPC_WDT->WDTC = (uint32_t) tempval;
frank26080115	0:84d7747641aa	123	return SUCCESS;
frank26080115	0:84d7747641aa	124	}
frank26080115	0:84d7747641aa	125
frank26080115	0:84d7747641aa	126	break;
frank26080115	0:84d7747641aa	127
frank26080115	0:84d7747641aa	128	// Error parameter
frank26080115	0:84d7747641aa	129	default:
frank26080115	0:84d7747641aa	130	break;
frank26080115	0:84d7747641aa	131	}
frank26080115	0:84d7747641aa	132
frank26080115	0:84d7747641aa	133	return ERROR;
frank26080115	0:84d7747641aa	134	}
frank26080115	0:84d7747641aa	135
frank26080115	0:84d7747641aa	136	/* End of Private Functions --------------------------------------------------- */
frank26080115	0:84d7747641aa	137
frank26080115	0:84d7747641aa	138
frank26080115	0:84d7747641aa	139	/* Public Functions ----------------------------------------------------------- */
frank26080115	0:84d7747641aa	140	/** @addtogroup WDT_Public_Functions
frank26080115	0:84d7747641aa	141	* @{
frank26080115	0:84d7747641aa	142	*/
frank26080115	0:84d7747641aa	143
frank26080115	0:84d7747641aa	144
frank26080115	0:84d7747641aa	145	/*******************************************************************//
frank26080115	0:84d7747641aa	146	* @brief Initial for Watchdog function
frank26080115	0:84d7747641aa	147	* Clock source = RTC ,
frank26080115	0:84d7747641aa	148	* @param[in] ClkSrc Select clock source, should be:
frank26080115	0:84d7747641aa	149	* - WDT_CLKSRC_IRC: Clock source from Internal RC oscillator
frank26080115	0:84d7747641aa	150	* - WDT_CLKSRC_PCLK: Selects the APB peripheral clock (PCLK)
frank26080115	0:84d7747641aa	151	* - WDT_CLKSRC_RTC: Selects the RTC oscillator
frank26080115	0:84d7747641aa	152	* @param[in] WDTMode WDT mode, should be:
frank26080115	0:84d7747641aa	153	* - WDT_MODE_INT_ONLY: Use WDT to generate interrupt only
frank26080115	0:84d7747641aa	154	* - WDT_MODE_RESET: Use WDT to generate interrupt and reset MCU
frank26080115	0:84d7747641aa	155	* @return None
frank26080115	0:84d7747641aa	156	**********************************************************************/
frank26080115	0:84d7747641aa	157	void WDT_Init (WDT_CLK_OPT ClkSrc, WDT_MODE_OPT WDTMode)
frank26080115	0:84d7747641aa	158	{
frank26080115	0:84d7747641aa	159	CHECK_PARAM(PARAM_WDT_CLK_OPT(ClkSrc));
frank26080115	0:84d7747641aa	160	CHECK_PARAM(PARAM_WDT_MODE_OPT(WDTMode));
frank26080115	0:84d7747641aa	161	CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_4);
frank26080115	0:84d7747641aa	162
frank26080115	0:84d7747641aa	163	//Set clock source
frank26080115	0:84d7747641aa	164	LPC_WDT->WDCLKSEL &= ~WDT_WDCLKSEL_MASK;
frank26080115	0:84d7747641aa	165	LPC_WDT->WDCLKSEL \|= ClkSrc;
frank26080115	0:84d7747641aa	166	//Set WDT mode
frank26080115	0:84d7747641aa	167	if (WDTMode == WDT_MODE_RESET){
frank26080115	0:84d7747641aa	168	LPC_WDT->WDMOD \|= WDT_WDMOD(WDTMode);
frank26080115	0:84d7747641aa	169	}
frank26080115	0:84d7747641aa	170	}
frank26080115	0:84d7747641aa	171
frank26080115	0:84d7747641aa	172	/*******************************************************************//
frank26080115	0:84d7747641aa	173	* @brief Start WDT activity with given timeout value
frank26080115	0:84d7747641aa	174	* @param[in] TimeOut WDT reset after timeout if it is not feed
frank26080115	0:84d7747641aa	175	* @return None
frank26080115	0:84d7747641aa	176	**********************************************************************/
frank26080115	0:84d7747641aa	177	void WDT_Start(uint32_t TimeOut)
frank26080115	0:84d7747641aa	178	{
frank26080115	0:84d7747641aa	179	uint32_t ClkSrc;
frank26080115	0:84d7747641aa	180
frank26080115	0:84d7747641aa	181	ClkSrc = LPC_WDT->WDCLKSEL;
frank26080115	0:84d7747641aa	182	ClkSrc &=WDT_WDCLKSEL_MASK;
frank26080115	0:84d7747641aa	183	WDT_SetTimeOut(ClkSrc,TimeOut);
frank26080115	0:84d7747641aa	184	//enable watchdog
frank26080115	0:84d7747641aa	185	LPC_WDT->WDMOD \|= WDT_WDMOD_WDEN;
frank26080115	0:84d7747641aa	186	WDT_Feed();
frank26080115	0:84d7747641aa	187	}
frank26080115	0:84d7747641aa	188
frank26080115	0:84d7747641aa	189	/******************************************************************//
frank26080115	0:84d7747641aa	190	* @brief Read WDT Time out flag
frank26080115	0:84d7747641aa	191	* @param[in] None
frank26080115	0:84d7747641aa	192	* @return Time out flag status of WDT
frank26080115	0:84d7747641aa	193	*********************************************************************/
frank26080115	0:84d7747641aa	194	FlagStatus WDT_ReadTimeOutFlag (void)
frank26080115	0:84d7747641aa	195	{
frank26080115	0:84d7747641aa	196	return ((FlagStatus)((LPC_WDT->WDMOD & WDT_WDMOD_WDTOF) >>2));
frank26080115	0:84d7747641aa	197	}
frank26080115	0:84d7747641aa	198
frank26080115	0:84d7747641aa	199	/******************************************************************//
frank26080115	0:84d7747641aa	200	* @brief Clear WDT Time out flag
frank26080115	0:84d7747641aa	201	* @param[in] None
frank26080115	0:84d7747641aa	202	* @return None
frank26080115	0:84d7747641aa	203	*********************************************************************/
frank26080115	0:84d7747641aa	204	void WDT_ClrTimeOutFlag (void)
frank26080115	0:84d7747641aa	205	{
frank26080115	0:84d7747641aa	206	LPC_WDT->WDMOD &=~WDT_WDMOD_WDTOF;
frank26080115	0:84d7747641aa	207	}
frank26080115	0:84d7747641aa	208
frank26080115	0:84d7747641aa	209	/******************************************************************//
frank26080115	0:84d7747641aa	210	* @brief Update WDT timeout value and feed
frank26080115	0:84d7747641aa	211	* @param[in] TimeOut TimeOut value to be updated
frank26080115	0:84d7747641aa	212	* @return None
frank26080115	0:84d7747641aa	213	*********************************************************************/
frank26080115	0:84d7747641aa	214	void WDT_UpdateTimeOut ( uint32_t TimeOut)
frank26080115	0:84d7747641aa	215	{
frank26080115	0:84d7747641aa	216	uint32_t ClkSrc;
frank26080115	0:84d7747641aa	217	ClkSrc = LPC_WDT->WDCLKSEL;
frank26080115	0:84d7747641aa	218	ClkSrc &=WDT_WDCLKSEL_MASK;
frank26080115	0:84d7747641aa	219	WDT_SetTimeOut(ClkSrc,TimeOut);
frank26080115	0:84d7747641aa	220	WDT_Feed();
frank26080115	0:84d7747641aa	221	}
frank26080115	0:84d7747641aa	222
frank26080115	0:84d7747641aa	223
frank26080115	0:84d7747641aa	224	/******************************************************************//
frank26080115	0:84d7747641aa	225	* @brief After set WDTEN, call this function to start Watchdog
frank26080115	0:84d7747641aa	226	* or reload the Watchdog timer
frank26080115	0:84d7747641aa	227	* @param[in] None
frank26080115	0:84d7747641aa	228	*
frank26080115	0:84d7747641aa	229	* @return None
frank26080115	0:84d7747641aa	230	*********************************************************************/
frank26080115	0:84d7747641aa	231	void WDT_Feed (void)
frank26080115	0:84d7747641aa	232	{
frank26080115	0:84d7747641aa	233	// Disable irq interrupt
frank26080115	0:84d7747641aa	234	__disable_irq();
frank26080115	0:84d7747641aa	235	LPC_WDT->WDFEED = 0xAA;
frank26080115	0:84d7747641aa	236	LPC_WDT->WDFEED = 0x55;
frank26080115	0:84d7747641aa	237	// Then enable irq interrupt
frank26080115	0:84d7747641aa	238	__enable_irq();
frank26080115	0:84d7747641aa	239	}
frank26080115	0:84d7747641aa	240
frank26080115	0:84d7747641aa	241	/******************************************************************//
frank26080115	0:84d7747641aa	242	* @brief Get the current value of WDT
frank26080115	0:84d7747641aa	243	* @param[in] None
frank26080115	0:84d7747641aa	244	* @return current value of WDT
frank26080115	0:84d7747641aa	245	*********************************************************************/
frank26080115	0:84d7747641aa	246	uint32_t WDT_GetCurrentCount(void)
frank26080115	0:84d7747641aa	247	{
frank26080115	0:84d7747641aa	248	return LPC_WDT->WDTV;
frank26080115	0:84d7747641aa	249	}
frank26080115	0:84d7747641aa	250
frank26080115	0:84d7747641aa	251	/**
frank26080115	0:84d7747641aa	252	* @}
frank26080115	0:84d7747641aa	253	*/
frank26080115	0:84d7747641aa	254
frank26080115	0:84d7747641aa	255	#endif /* _WDT */
frank26080115	0:84d7747641aa	256
frank26080115	0:84d7747641aa	257	/**
frank26080115	0:84d7747641aa	258	* @}
frank26080115	0:84d7747641aa	259	*/
frank26080115	0:84d7747641aa	260
frank26080115	0:84d7747641aa	261	/* --------------------------------- End Of File ------------------------------ */

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Type:	Library
Created:	20 Mar 2011
Imports:	652
Forks:	0
Commits:	1
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lpc17xx_wdt.c@0:84d7747641aa, 2011-03-20 (annotated)

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