Frank 26080115 / LPC1700CMSIS_Examples

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

TIMER/Capture/timer_capture.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?

        

            
                
UserRevisionLine numberNew contents of line

            
            


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/***********************************************************************//**





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 * @file		timer_capture.c





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 * @purpose		This example describes how to use TIMER capture function





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 * @version		2.0





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 * @date		21. May. 2010





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 * @author		NXP MCU SW Application Team





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 *---------------------------------------------------------------------





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 * Software that is described herein is for illustrative purposes only





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 * which provides customers with programming information regarding the





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 * products. This software is supplied "AS IS" without any warranties.





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 * NXP Semiconductors assumes no responsibility or liability for the





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 * use of the software, conveys no license or title under any patent,





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 * copyright, or mask work right to the product. NXP Semiconductors





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 * reserves the right to make changes in the software without





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 * notification. NXP Semiconductors also make no representation or





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 * warranty that such application will be suitable for the specified





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 * use without further testing or modification.





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 **********************************************************************/





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#include "lpc17xx_timer.h"





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#include "lpc17xx_libcfg.h"





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#include "lpc17xx_pinsel.h"





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#include "debug_frmwrk.h"





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#include "lpc17xx_gpio.h"





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/* Example group ----------------------------------------------------------- */





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/** @defgroup TIMER_Capture	Capture





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 * @ingroup TIMER_Examples





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 * @{





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 */





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/************************** PRIVATE VARIABLES *************************/





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uint8_t menu1[] =





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"********************************************************************************\n\r"





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"Hello NXP Semiconductors \n\r"





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"Timer Match interrupt demo \n\r"





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"\t - MCU: LPC17xx \n\r"





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"\t - Core: ARM Cortex-M3 \n\r"





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"\t - Communicate via: UART0 -  115200 bps \n\r"





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" Use timer 0 to take a snapshot of the timer value when an input signal \n\r"





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" on CAP0.0 transitions \n\r"





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"********************************************************************************\n\r";





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// UART Configuration structure variable





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UART_CFG_Type UARTConfigStruct;





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uint32_t MatchCount;





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//timer init





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TIM_TIMERCFG_Type TIM_ConfigStruct;





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TIM_MATCHCFG_Type TIM_MatchConfigStruct ;





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TIM_CAPTURECFG_Type TIM_CaptureConfigStruct;





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uint8_t volatile timer0_flag = FALSE, timer1_flag = FALSE;





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/************************** PRIVATE FUNCTIONS *************************/





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/* Interrupt service routines */





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void TIMER0_IRQHandler(void);





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void TIMER1_IRQHandler(void);





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void print_menu(void);





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/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/





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/*********************************************************************//**





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 * @brief		TIMER0 interrupt handler sub-routine





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 * @param[in]	None





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 * @return 		None





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 **********************************************************************/





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void TIMER0_IRQHandler(void)





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{





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	if (TIM_GetIntCaptureStatus(LPC_TIM0,0))





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	{





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		TIM_ClearIntCapturePending(LPC_TIM0,0);





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		_DBG("Time capture: ");





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		_DBH32(TIM_GetCaptureValue(LPC_TIM0,0));_DBG_("");





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	}





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}





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/*********************************************************************//**





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 * @brief		TIMER1 interrupt handler sub-routine





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 * @param[in]	None





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 * @return 		None





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 **********************************************************************/





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void TIMER1_IRQHandler(void)





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{





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	if (TIM_GetIntCaptureStatus(LPC_TIM1,0))





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	{





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		TIM_ClearIntCapturePending(LPC_TIM1,0);





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		_DBG("Time capture: ");





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		_DBH32(TIM_GetCaptureValue(LPC_TIM1,0));_DBG_("");





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	}





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}





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/*-------------------------PRIVATE FUNCTIONS------------------------------*/





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/*********************************************************************//**





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 * @brief		Print menu





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 * @param[in]	None





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 * @return 		None





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 **********************************************************************/





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void print_menu(void)





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{





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	_DBG(menu1);





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}





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/*-------------------------MAIN FUNCTION------------------------------*/





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/*********************************************************************//**





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 * @brief		c_entry: Main TIMER program body





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 * @param[in]	None





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 * @return 		int





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 **********************************************************************/





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int c_entry(void)





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{





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	PINSEL_CFG_Type PinCfg;





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	/* Initialize debug via UART0





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	 * – 115200bps





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	 * – 8 data bit





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	 * – No parity





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	 * – 1 stop bit





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	 * – No flow control





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	 */





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	debug_frmwrk_init();





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	// print welcome screen





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	print_menu();





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	//Config P1.26 as CAP0.0





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	PinCfg.Funcnum = 3;





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	PinCfg.OpenDrain = 0;





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	PinCfg.Pinmode = 0;





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	PinCfg.Portnum = 1;





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	PinCfg.Pinnum = 26;





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	PINSEL_ConfigPin(&PinCfg);





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	// Initialize timer 0, prescale count time of 1000000uS = 1S





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	TIM_ConfigStruct.PrescaleOption = TIM_PRESCALE_USVAL;





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	TIM_ConfigStruct.PrescaleValue	= 1000000;





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	// use channel 0, CAPn.0





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	TIM_CaptureConfigStruct.CaptureChannel = 0;





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	// Enable capture on CAPn.0 rising edge





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	TIM_CaptureConfigStruct.RisingEdge = ENABLE;





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	// Enable capture on CAPn.0 falling edge





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	TIM_CaptureConfigStruct.FallingEdge = ENABLE;





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	// Generate capture interrupt





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	TIM_CaptureConfigStruct.IntOnCaption = ENABLE;





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	// Set configuration for Tim_config and Tim_MatchConfig





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	TIM_Init(LPC_TIM0, TIM_TIMER_MODE,&TIM_ConfigStruct);





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	TIM_ConfigCapture(LPC_TIM0, &TIM_CaptureConfigStruct);





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	TIM_ResetCounter(LPC_TIM0);





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	/* preemption = 1, sub-priority = 1 */





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	NVIC_SetPriority(TIMER0_IRQn, ((0x01<<3)|0x01));





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	/* Enable interrupt for timer 0 */





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	NVIC_EnableIRQ(TIMER0_IRQn);





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	// To start timer 0





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	TIM_Cmd(LPC_TIM0,ENABLE);





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	while (1);





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	return 1;





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}





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/* Support required entry point for other toolchain */





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int main (void)





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{





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	return c_entry();





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}





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#ifdef  DEBUG





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/*******************************************************************************





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* @brief		Reports the name of the source file and the source line number





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* 				where the CHECK_PARAM error has occurred.





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* @param[in]	file Pointer to the source file name





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* @param[in]    line assert_param error line source number





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* @return		None





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*******************************************************************************/





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void check_failed(uint8_t *file, uint32_t line)





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{





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	/* User can add his own implementation to report the file name and line number,





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	 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */





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	/* Infinite loop */





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	while(1);





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}





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#endif





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/*





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 * @}





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 */