Frank 26080115 / LPC1700CMSIS_Examples

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

ADC/HardwareTrigger/adc_hardware_trigger_test.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		adc_hardware_trigger_test.c





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 * @purpose		This example describes how to use ADC conversion in





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 * 			  	interrupt mode





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 * @version		1.0





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 * @date		18. June. 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_adc.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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/* Example group ----------------------------------------------------------- */





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/** @defgroup ADC_HardwareTrigger	HardwareTrigger





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 * @ingroup ADC_Examples





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 * @{





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 */





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/************************** PRIVATE DEFINITIONS ***********************/





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#define _ADC_INT			ADC_ADINTEN2





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#define _ADC_CHANNEL		ADC_CHANNEL_2





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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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" ADC 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 ADC with 12-bit resolution rate of 200KHz, read in hardware-triggred mode\n\r"





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" Press INT0 button to start ADC conversion, ADC interrupt when conversion completed\n\r"





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" ADC channel value is read back and displayed via UART0\n\r"





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" Turn the potentiometer to see how ADC value changes\n\r"





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





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uint32_t adc_value;





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/************************** PRIVATE FUNCTION *************************/





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void ADC_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		ADC 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 ADC_IRQHandler(void)





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{





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	adc_value = 0;





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	if (ADC_ChannelGetStatus(LPC_ADC,ADC_CHANNEL_2,ADC_DATA_DONE))





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	{





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		adc_value =  ADC_ChannelGetData(LPC_ADC,ADC_CHANNEL_2);





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		NVIC_DisableIRQ(ADC_IRQn);





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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 ADC 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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	/*





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	 * Init ADC pin connect





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	 * AD0.2 on P0.25





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	 */





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	PinCfg.Funcnum = 1;





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	PinCfg.OpenDrain = 0;





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	PinCfg.Pinmode = 0;





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	PinCfg.Pinnum = 25;





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	PinCfg.Portnum = 0;





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	PINSEL_ConfigPin(&PinCfg);





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	/*





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	 * Init P2.10





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	 *





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	 */





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	PinCfg.Funcnum = 1; //EINT0





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	PinCfg.OpenDrain = 0;





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	PinCfg.Pinmode = 0;





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	PinCfg.Pinnum = 10;





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	PinCfg.Portnum = 2;





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	PINSEL_ConfigPin(&PinCfg);





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	/* Configuration for ADC:





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	 *  select: ADC channel 2 (if using MCB1700 board)





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	 *  		ADC channel 5 (if using IAR-LPC1768 board)





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	 *  ADC conversion rate = 200KHz





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	 */





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	ADC_Init(LPC_ADC, 200000);





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	ADC_IntConfig(LPC_ADC,_ADC_INT,ENABLE);





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	ADC_ChannelCmd(LPC_ADC,_ADC_CHANNEL,ENABLE);





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	ADC_EdgeStartConfig(LPC_ADC,ADC_START_ON_FALLING);





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





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





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	while(1)





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	{





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		adc_value = 0;





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		// Start conversion on EINT0 falling edge





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		ADC_StartCmd(LPC_ADC,ADC_START_ON_EINT0);





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		/* Enable ADC in NVIC */





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		NVIC_EnableIRQ(ADC_IRQn);





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		_DBG("Press INT0 button to start ADC conversion on AD0.2...");_DBG_("");





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		while(adc_value==0);





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		//Display the result of conversion on the UART0





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		_DBG("ADC value on channel 2: ");





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		_DBD32(adc_value);





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		_DBG_("");





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	}





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	ADC_DeInit(LPC_ADC);





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	return (0);





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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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 */