LPC1700CMSIS_Examples - These are the examples provided for [[/users/fran…

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These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!

RTC/Calibration/rtc_calib.c@0:bf7b9fba3924, 2011-03-20 (annotated)

Committer:: frank26080115
Date:: Sun Mar 20 05:38:56 2011 +0000
Revision:: 0:bf7b9fba3924

Who changed what in which revision?

User	Revision	Line number	New contents of line
frank26080115	0:bf7b9fba3924	1	/*********************************************************************//
frank26080115	0:bf7b9fba3924	2	* @file rtc_calib.c
frank26080115	0:bf7b9fba3924	3	* @purpose This example describes how to calibrate real time clock.
frank26080115	0:bf7b9fba3924	4	* @version 2.0
frank26080115	0:bf7b9fba3924	5	* @date 18. June. 2010
frank26080115	0:bf7b9fba3924	6	* @author NXP MCU SW Application Team
frank26080115	0:bf7b9fba3924	7	*---------------------------------------------------------------------
frank26080115	0:bf7b9fba3924	8	* Software that is described herein is for illustrative purposes only
frank26080115	0:bf7b9fba3924	9	* which provides customers with programming information regarding the
frank26080115	0:bf7b9fba3924	10	* products. This software is supplied "AS IS" without any warranties.
frank26080115	0:bf7b9fba3924	11	* NXP Semiconductors assumes no responsibility or liability for the
frank26080115	0:bf7b9fba3924	12	* use of the software, conveys no license or title under any patent,
frank26080115	0:bf7b9fba3924	13	* copyright, or mask work right to the product. NXP Semiconductors
frank26080115	0:bf7b9fba3924	14	* reserves the right to make changes in the software without
frank26080115	0:bf7b9fba3924	15	* notification. NXP Semiconductors also make no representation or
frank26080115	0:bf7b9fba3924	16	* warranty that such application will be suitable for the specified
frank26080115	0:bf7b9fba3924	17	* use without further testing or modification.
frank26080115	0:bf7b9fba3924	18	**********************************************************************/
frank26080115	0:bf7b9fba3924	19	#include "LPC17xx.h"
frank26080115	0:bf7b9fba3924	20	#include "lpc17xx_clkpwr.h"
frank26080115	0:bf7b9fba3924	21	#include "lpc17xx_libcfg.h"
frank26080115	0:bf7b9fba3924	22	#include "debug_frmwrk.h"
frank26080115	0:bf7b9fba3924	23	#include "lpc17xx_rtc.h"
frank26080115	0:bf7b9fba3924	24
frank26080115	0:bf7b9fba3924	25	/* Example group ----------------------------------------------------------- */
frank26080115	0:bf7b9fba3924	26	/** @defgroup RTC_Calibration Calibration
frank26080115	0:bf7b9fba3924	27	* @ingroup RTC_Examples
frank26080115	0:bf7b9fba3924	28	* @{
frank26080115	0:bf7b9fba3924	29	*/
frank26080115	0:bf7b9fba3924	30
frank26080115	0:bf7b9fba3924	31
frank26080115	0:bf7b9fba3924	32	/************************ PRIVATE VARIABLES ***********************/
frank26080115	0:bf7b9fba3924	33	uint8_t menu[]=
frank26080115	0:bf7b9fba3924	34	"********************************************************************************\n\r"
frank26080115	0:bf7b9fba3924	35	"Hello NXP Semiconductors \n\r"
frank26080115	0:bf7b9fba3924	36	"RTC Calibration demo \n\r"
frank26080115	0:bf7b9fba3924	37	"\t - MCU: LPC17xx \n\r"
frank26080115	0:bf7b9fba3924	38	"\t - Core: ARM CORTEX-M3 \n\r"
frank26080115	0:bf7b9fba3924	39	"\t - Communicate via: UART0 - 115200 bps \n\r"
frank26080115	0:bf7b9fba3924	40	"This example describes how to calibrate RTC \n\r"
frank26080115	0:bf7b9fba3924	41	"********************************************************************************\n\r";
frank26080115	0:bf7b9fba3924	42
frank26080115	0:bf7b9fba3924	43	/************************ PRIVATE FUNCTIONS ***********************/
frank26080115	0:bf7b9fba3924	44	void print_menu(void);
frank26080115	0:bf7b9fba3924	45	void RTC_IRQHandle(void);
frank26080115	0:bf7b9fba3924	46
frank26080115	0:bf7b9fba3924	47	/----------------- INTERRUPT SERVICE ROUTINES --------------------------/
frank26080115	0:bf7b9fba3924	48	/*******************************************************************//
frank26080115	0:bf7b9fba3924	49	* @brief RTC interrupt handler sub-routine
frank26080115	0:bf7b9fba3924	50	* @param[in] None
frank26080115	0:bf7b9fba3924	51	* @return None
frank26080115	0:bf7b9fba3924	52	**********************************************************************/
frank26080115	0:bf7b9fba3924	53	void RTC_IRQHandler(void)
frank26080115	0:bf7b9fba3924	54	{
frank26080115	0:bf7b9fba3924	55	uint32_t secval;
frank26080115	0:bf7b9fba3924	56
frank26080115	0:bf7b9fba3924	57	/* This is increment counter interrupt*/
frank26080115	0:bf7b9fba3924	58	if (RTC_GetIntPending(LPC_RTC, RTC_INT_COUNTER_INCREASE))
frank26080115	0:bf7b9fba3924	59	{
frank26080115	0:bf7b9fba3924	60	secval = RTC_GetTime (LPC_RTC, RTC_TIMETYPE_SECOND);
frank26080115	0:bf7b9fba3924	61
frank26080115	0:bf7b9fba3924	62	/* Send debug information */
frank26080115	0:bf7b9fba3924	63	_DBG ("Second: "); _DBD(secval);
frank26080115	0:bf7b9fba3924	64	_DBG_("");
frank26080115	0:bf7b9fba3924	65
frank26080115	0:bf7b9fba3924	66	// Clear pending interrupt
frank26080115	0:bf7b9fba3924	67	RTC_ClearIntPending(LPC_RTC, RTC_INT_COUNTER_INCREASE);
frank26080115	0:bf7b9fba3924	68	}
frank26080115	0:bf7b9fba3924	69	}
frank26080115	0:bf7b9fba3924	70
frank26080115	0:bf7b9fba3924	71	/-------------------------PRIVATE FUNCTIONS------------------------------/
frank26080115	0:bf7b9fba3924	72	/*******************************************************************//
frank26080115	0:bf7b9fba3924	73	* @brief Print Welcome menu
frank26080115	0:bf7b9fba3924	74	* @param[in] none
frank26080115	0:bf7b9fba3924	75	* @return None
frank26080115	0:bf7b9fba3924	76	**********************************************************************/
frank26080115	0:bf7b9fba3924	77	void print_menu(void)
frank26080115	0:bf7b9fba3924	78	{
frank26080115	0:bf7b9fba3924	79	_DBG(menu);
frank26080115	0:bf7b9fba3924	80	}
frank26080115	0:bf7b9fba3924	81
frank26080115	0:bf7b9fba3924	82	/-------------------------MAIN FUNCTION------------------------------/
frank26080115	0:bf7b9fba3924	83	/*******************************************************************//
frank26080115	0:bf7b9fba3924	84	* @brief c_entry: Main program body
frank26080115	0:bf7b9fba3924	85	* @param[in] None
frank26080115	0:bf7b9fba3924	86	* @return int
frank26080115	0:bf7b9fba3924	87	**********************************************************************/
frank26080115	0:bf7b9fba3924	88	int c_entry (void)
frank26080115	0:bf7b9fba3924	89	{
frank26080115	0:bf7b9fba3924	90	/* Initialize debug via UART0
frank26080115	0:bf7b9fba3924	91	* 115200bps
frank26080115	0:bf7b9fba3924	92	* 8 data bit
frank26080115	0:bf7b9fba3924	93	* No parity
frank26080115	0:bf7b9fba3924	94	* 1 stop bit
frank26080115	0:bf7b9fba3924	95	* No flow control
frank26080115	0:bf7b9fba3924	96	*/
frank26080115	0:bf7b9fba3924	97	debug_frmwrk_init();
frank26080115	0:bf7b9fba3924	98
frank26080115	0:bf7b9fba3924	99	// print welcome screen
frank26080115	0:bf7b9fba3924	100	print_menu();
frank26080115	0:bf7b9fba3924	101
frank26080115	0:bf7b9fba3924	102	/* In this example:
frank26080115	0:bf7b9fba3924	103	* Suppose that the RTC need periodically adjust after each 5 second.
frank26080115	0:bf7b9fba3924	104	* And the time counter need by incrementing the counter by 2 instead of 1
frank26080115	0:bf7b9fba3924	105	* We will observe timer counter after calibration via serial display
frank26080115	0:bf7b9fba3924	106	*/
frank26080115	0:bf7b9fba3924	107	// Init RTC module
frank26080115	0:bf7b9fba3924	108	RTC_Init(LPC_RTC);
frank26080115	0:bf7b9fba3924	109
frank26080115	0:bf7b9fba3924	110	/* Enable rtc (starts increase the tick counter and second counter register) */
frank26080115	0:bf7b9fba3924	111	RTC_ResetClockTickCounter(LPC_RTC);
frank26080115	0:bf7b9fba3924	112	RTC_Cmd(LPC_RTC, ENABLE);
frank26080115	0:bf7b9fba3924	113
frank26080115	0:bf7b9fba3924	114	//Set current time = 0
frank26080115	0:bf7b9fba3924	115	RTC_SetTime (LPC_RTC, RTC_TIMETYPE_SECOND, 0);
frank26080115	0:bf7b9fba3924	116
frank26080115	0:bf7b9fba3924	117	/* Setting Timer calibration
frank26080115	0:bf7b9fba3924	118	* Calibration value = 5s;
frank26080115	0:bf7b9fba3924	119	* Direction = Forward calibration
frank26080115	0:bf7b9fba3924	120	* So after each 5s, calibration logic can periodically adjust the time counter by
frank26080115	0:bf7b9fba3924	121	* incrementing the counter by 2 instead of 1
frank26080115	0:bf7b9fba3924	122	*/
frank26080115	0:bf7b9fba3924	123	RTC_CalibConfig(LPC_RTC, 5, RTC_CALIB_DIR_FORWARD);
frank26080115	0:bf7b9fba3924	124	RTC_CalibCounterCmd(LPC_RTC, ENABLE);
frank26080115	0:bf7b9fba3924	125
frank26080115	0:bf7b9fba3924	126	/* Set the CIIR for second counter interrupt*/
frank26080115	0:bf7b9fba3924	127	RTC_CntIncrIntConfig (LPC_RTC, RTC_TIMETYPE_SECOND, ENABLE);
frank26080115	0:bf7b9fba3924	128
frank26080115	0:bf7b9fba3924	129	/* Enable RTC interrupt */
frank26080115	0:bf7b9fba3924	130	NVIC_EnableIRQ(RTC_IRQn);
frank26080115	0:bf7b9fba3924	131
frank26080115	0:bf7b9fba3924	132	/* Loop forever */
frank26080115	0:bf7b9fba3924	133	while(1);
frank26080115	0:bf7b9fba3924	134	return 1;
frank26080115	0:bf7b9fba3924	135	}
frank26080115	0:bf7b9fba3924	136
frank26080115	0:bf7b9fba3924	137
frank26080115	0:bf7b9fba3924	138	/* With ARM and GHS toolsets, the entry point is main() - this will
frank26080115	0:bf7b9fba3924	139	allow the linker to generate wrapper code to setup stacks, allocate
frank26080115	0:bf7b9fba3924	140	heap area, and initialize and copy code and data segments. For GNU
frank26080115	0:bf7b9fba3924	141	toolsets, the entry point is through __start() in the crt0_gnu.asm
frank26080115	0:bf7b9fba3924	142	file, and that startup code will setup stacks and data */
frank26080115	0:bf7b9fba3924	143	int main(void)
frank26080115	0:bf7b9fba3924	144	{
frank26080115	0:bf7b9fba3924	145	return c_entry();
frank26080115	0:bf7b9fba3924	146	}
frank26080115	0:bf7b9fba3924	147
frank26080115	0:bf7b9fba3924	148	#ifdef DEBUG
frank26080115	0:bf7b9fba3924	149	/*******************************************************************************
frank26080115	0:bf7b9fba3924	150	* @brief Reports the name of the source file and the source line number
frank26080115	0:bf7b9fba3924	151	* where the CHECK_PARAM error has occurred.
frank26080115	0:bf7b9fba3924	152	* @param[in] file Pointer to the source file name
frank26080115	0:bf7b9fba3924	153	* @param[in] line assert_param error line source number
frank26080115	0:bf7b9fba3924	154	* @return None
frank26080115	0:bf7b9fba3924	155	*******************************************************************************/
frank26080115	0:bf7b9fba3924	156	void check_failed(uint8_t *file, uint32_t line)
frank26080115	0:bf7b9fba3924	157	{
frank26080115	0:bf7b9fba3924	158	/* User can add his own implementation to report the file name and line number,
frank26080115	0:bf7b9fba3924	159	ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
frank26080115	0:bf7b9fba3924	160
frank26080115	0:bf7b9fba3924	161	/* Infinite loop */
frank26080115	0:bf7b9fba3924	162	while(1);
frank26080115	0:bf7b9fba3924	163	}
frank26080115	0:bf7b9fba3924	164	#endif
frank26080115	0:bf7b9fba3924	165
frank26080115	0:bf7b9fba3924	166	/*
frank26080115	0:bf7b9fba3924	167	* @}
frank26080115	0:bf7b9fba3924	168	*/

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Type:	Program
Created:	20 Mar 2011
Imports:	199
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	7

RTC/Calibration/rtc_calib.c@0:bf7b9fba3924, 2011-03-20 (annotated)

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