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!

ADC/DMA/adc_dma_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?

User	Revision	Line number	New contents of line
frank26080115	0:bf7b9fba3924	1	/*********************************************************************//
frank26080115	0:bf7b9fba3924	2	* @file adc_dma_test.c
frank26080115	0:bf7b9fba3924	3	* @purpose This example describes how to use ADC conversions and
frank26080115	0:bf7b9fba3924	4	* transfer converted data by using DMA.
frank26080115	0:bf7b9fba3924	5	* @version 2.0
frank26080115	0:bf7b9fba3924	6	* @date 21. May. 2010
frank26080115	0:bf7b9fba3924	7	* @author NXP MCU SW Application Team
frank26080115	0:bf7b9fba3924	8	*---------------------------------------------------------------------
frank26080115	0:bf7b9fba3924	9	* Software that is described herein is for illustrative purposes only
frank26080115	0:bf7b9fba3924	10	* which provides customers with programming information regarding the
frank26080115	0:bf7b9fba3924	11	* products. This software is supplied "AS IS" without any warranties.
frank26080115	0:bf7b9fba3924	12	* NXP Semiconductors assumes no responsibility or liability for the
frank26080115	0:bf7b9fba3924	13	* use of the software, conveys no license or title under any patent,
frank26080115	0:bf7b9fba3924	14	* copyright, or mask work right to the product. NXP Semiconductors
frank26080115	0:bf7b9fba3924	15	* reserves the right to make changes in the software without
frank26080115	0:bf7b9fba3924	16	* notification. NXP Semiconductors also make no representation or
frank26080115	0:bf7b9fba3924	17	* warranty that such application will be suitable for the specified
frank26080115	0:bf7b9fba3924	18	* use without further testing or modification.
frank26080115	0:bf7b9fba3924	19	**********************************************************************/
frank26080115	0:bf7b9fba3924	20	#include "lpc17xx_adc.h"
frank26080115	0:bf7b9fba3924	21	#include "lpc17xx_libcfg.h"
frank26080115	0:bf7b9fba3924	22	#include "lpc17xx_pinsel.h"
frank26080115	0:bf7b9fba3924	23	#include "lpc17xx_nvic.h"
frank26080115	0:bf7b9fba3924	24	#include "lpc17xx_gpdma.h"
frank26080115	0:bf7b9fba3924	25	#include "debug_frmwrk.h"
frank26080115	0:bf7b9fba3924	26
frank26080115	0:bf7b9fba3924	27	/* Example group ----------------------------------------------------------- */
frank26080115	0:bf7b9fba3924	28	/** @defgroup ADC_DMA DMA
frank26080115	0:bf7b9fba3924	29	* @ingroup ADC_Examples
frank26080115	0:bf7b9fba3924	30	* @{
frank26080115	0:bf7b9fba3924	31	*/
frank26080115	0:bf7b9fba3924	32	/************************ PRIVATE DEFINITIONS ***********************/
frank26080115	0:bf7b9fba3924	33	#define MCB_LPC_1768
frank26080115	0:bf7b9fba3924	34	//#define IAR_LPC_1768
frank26080115	0:bf7b9fba3924	35
frank26080115	0:bf7b9fba3924	36	#ifdef MCB_LPC_1768
frank26080115	0:bf7b9fba3924	37	#define _ADC_INT ADC_ADINTEN2
frank26080115	0:bf7b9fba3924	38	#define _ADC_CHANNEL ADC_CHANNEL_2
frank26080115	0:bf7b9fba3924	39	#elif defined(IAR_LPC_1768)
frank26080115	0:bf7b9fba3924	40	#define _ADC_INT ADC_ADINTEN5
frank26080115	0:bf7b9fba3924	41	#define _ADC_CHANNEL ADC_CHANNEL_5
frank26080115	0:bf7b9fba3924	42	#endif
frank26080115	0:bf7b9fba3924	43
frank26080115	0:bf7b9fba3924	44	/** DMA size of transfer */
frank26080115	0:bf7b9fba3924	45	#define DMA_SIZE 1
frank26080115	0:bf7b9fba3924	46
frank26080115	0:bf7b9fba3924	47	/************************ PRIVATE VARIABLES ***********************/
frank26080115	0:bf7b9fba3924	48	uint8_t menu1[] =
frank26080115	0:bf7b9fba3924	49	"********************************************************************************\n\r"
frank26080115	0:bf7b9fba3924	50	"Hello NXP Semiconductors \n\r"
frank26080115	0:bf7b9fba3924	51	" ADC demo \n\r"
frank26080115	0:bf7b9fba3924	52	"\t - MCU: LPC17xx \n\r"
frank26080115	0:bf7b9fba3924	53	"\t - Core: ARM CORTEX-M3 \n\r"
frank26080115	0:bf7b9fba3924	54	"\t - Communicate via: UART0 - 115200bps \n\r"
frank26080115	0:bf7b9fba3924	55	" DMA testing : ADC peripheral to memory\n\r"
frank26080115	0:bf7b9fba3924	56	" Use ADC with 12-bit resolution rate of 200KHz\n\r"
frank26080115	0:bf7b9fba3924	57	" Value ADC channel is displayed by UART, this value is taken from destination memory value of DMA function \n\r"
frank26080115	0:bf7b9fba3924	58	" Turn the potentiometer to see how ADC value changes\n\r"
frank26080115	0:bf7b9fba3924	59	"********************************************************************************\n\r";
frank26080115	0:bf7b9fba3924	60	#ifdef MCB_LPC_1768
frank26080115	0:bf7b9fba3924	61	uint8_t menu2[] = "ADC value on channel 2: ";
frank26080115	0:bf7b9fba3924	62	#elif defined(IAR_LPC_1768)
frank26080115	0:bf7b9fba3924	63	uint8_t menu2[] = "ADC value on channel 5: ";
frank26080115	0:bf7b9fba3924	64	#endif
frank26080115	0:bf7b9fba3924	65
frank26080115	0:bf7b9fba3924	66	/* Terminal Counter flag for Channel 0 */
frank26080115	0:bf7b9fba3924	67	__IO uint32_t Channel0_TC;
frank26080115	0:bf7b9fba3924	68
frank26080115	0:bf7b9fba3924	69	/* Error Counter flag for Channel 0 */
frank26080115	0:bf7b9fba3924	70	__IO uint32_t Channel0_Err;
frank26080115	0:bf7b9fba3924	71
frank26080115	0:bf7b9fba3924	72	/************************ PRIVATE FUNCTION ***********************/
frank26080115	0:bf7b9fba3924	73	void DMA_IRQHandler (void);
frank26080115	0:bf7b9fba3924	74
frank26080115	0:bf7b9fba3924	75	void print_menu(void);
frank26080115	0:bf7b9fba3924	76
frank26080115	0:bf7b9fba3924	77	/----------------- INTERRUPT SERVICE ROUTINES --------------------------/
frank26080115	0:bf7b9fba3924	78	/*******************************************************************//
frank26080115	0:bf7b9fba3924	79	* @brief GPDMA interrupt handler sub-routine
frank26080115	0:bf7b9fba3924	80	* @param[in] None
frank26080115	0:bf7b9fba3924	81	* @return None
frank26080115	0:bf7b9fba3924	82	**********************************************************************/
frank26080115	0:bf7b9fba3924	83	void DMA_IRQHandler (void)
frank26080115	0:bf7b9fba3924	84	{
frank26080115	0:bf7b9fba3924	85	// check GPDMA interrupt on channel 0
frank26080115	0:bf7b9fba3924	86	if (GPDMA_IntGetStatus(GPDMA_STAT_INT, 0)){
frank26080115	0:bf7b9fba3924	87	// Check counter terminal status
frank26080115	0:bf7b9fba3924	88	if(GPDMA_IntGetStatus(GPDMA_STAT_INTTC, 0)){
frank26080115	0:bf7b9fba3924	89	// Clear terminate counter Interrupt pending
frank26080115	0:bf7b9fba3924	90	GPDMA_ClearIntPending (GPDMA_STATCLR_INTTC, 0);
frank26080115	0:bf7b9fba3924	91	Channel0_TC++;
frank26080115	0:bf7b9fba3924	92	}
frank26080115	0:bf7b9fba3924	93	// Check error terminal status
frank26080115	0:bf7b9fba3924	94	if (GPDMA_IntGetStatus(GPDMA_STAT_INTERR, 0)){
frank26080115	0:bf7b9fba3924	95	// Clear error counter Interrupt pending
frank26080115	0:bf7b9fba3924	96	GPDMA_ClearIntPending (GPDMA_STATCLR_INTERR, 0);
frank26080115	0:bf7b9fba3924	97	Channel0_Err++;
frank26080115	0:bf7b9fba3924	98	}
frank26080115	0:bf7b9fba3924	99	}
frank26080115	0:bf7b9fba3924	100	}
frank26080115	0:bf7b9fba3924	101
frank26080115	0:bf7b9fba3924	102	/-------------------------PRIVATE FUNCTIONS------------------------------/
frank26080115	0:bf7b9fba3924	103	/*******************************************************************//
frank26080115	0:bf7b9fba3924	104	* @brief Print menu
frank26080115	0:bf7b9fba3924	105	* @param[in] None
frank26080115	0:bf7b9fba3924	106	* @return None
frank26080115	0:bf7b9fba3924	107	**********************************************************************/
frank26080115	0:bf7b9fba3924	108	void print_menu(void)
frank26080115	0:bf7b9fba3924	109	{
frank26080115	0:bf7b9fba3924	110	_DBG(menu1);
frank26080115	0:bf7b9fba3924	111	}
frank26080115	0:bf7b9fba3924	112
frank26080115	0:bf7b9fba3924	113	/-------------------------MAIN FUNCTION------------------------------/
frank26080115	0:bf7b9fba3924	114	/*******************************************************************//
frank26080115	0:bf7b9fba3924	115	* @brief c_entry: Main ADC program body
frank26080115	0:bf7b9fba3924	116	* @param[in] None
frank26080115	0:bf7b9fba3924	117	* @return int
frank26080115	0:bf7b9fba3924	118	**********************************************************************/
frank26080115	0:bf7b9fba3924	119	int c_entry(void)
frank26080115	0:bf7b9fba3924	120	{
frank26080115	0:bf7b9fba3924	121	PINSEL_CFG_Type PinCfg;
frank26080115	0:bf7b9fba3924	122	GPDMA_Channel_CFG_Type GPDMACfg;
frank26080115	0:bf7b9fba3924	123	uint32_t adc_value, tmp;
frank26080115	0:bf7b9fba3924	124
frank26080115	0:bf7b9fba3924	125	/* Initialize ADC ----------------------------------------------------*/
frank26080115	0:bf7b9fba3924	126
frank26080115	0:bf7b9fba3924	127	/* Because the potentiometer on different boards (MCB & IAR) connect
frank26080115	0:bf7b9fba3924	128	* with different ADC channel, so we have to configure correct ADC channel
frank26080115	0:bf7b9fba3924	129	* on each board respectively.
frank26080115	0:bf7b9fba3924	130	* If you want to check other ADC channels, you have to wire this ADC pin directly
frank26080115	0:bf7b9fba3924	131	* to potentiometer pin (please see schematic doc for more reference)
frank26080115	0:bf7b9fba3924	132	*/
frank26080115	0:bf7b9fba3924	133	#ifdef MCB_LPC_1768
frank26080115	0:bf7b9fba3924	134	/* If using MCB1700 v.1 board
frank26080115	0:bf7b9fba3924	135	* select P0.25 as AD0.2
frank26080115	0:bf7b9fba3924	136	*/
frank26080115	0:bf7b9fba3924	137	PinCfg.Funcnum = 1;
frank26080115	0:bf7b9fba3924	138	PinCfg.OpenDrain = 0;
frank26080115	0:bf7b9fba3924	139	PinCfg.Pinmode = 0;
frank26080115	0:bf7b9fba3924	140	PinCfg.Pinnum = 25;
frank26080115	0:bf7b9fba3924	141	PinCfg.Portnum = 0;
frank26080115	0:bf7b9fba3924	142	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	143	#elif defined(IAR_LPC_1768)
frank26080115	0:bf7b9fba3924	144	/* If using IAR LPC1768 KS v.A board:
frank26080115	0:bf7b9fba3924	145	* select P1.31 as AD0.5
frank26080115	0:bf7b9fba3924	146	*/
frank26080115	0:bf7b9fba3924	147	PinCfg.Funcnum = 3;
frank26080115	0:bf7b9fba3924	148	PinCfg.OpenDrain = 0;
frank26080115	0:bf7b9fba3924	149	PinCfg.Pinmode = 0;
frank26080115	0:bf7b9fba3924	150	PinCfg.Pinnum = 31;
frank26080115	0:bf7b9fba3924	151	PinCfg.Portnum = 1;
frank26080115	0:bf7b9fba3924	152	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	153	#endif
frank26080115	0:bf7b9fba3924	154
frank26080115	0:bf7b9fba3924	155	/* Initialize debug via UART0
frank26080115	0:bf7b9fba3924	156	* 115200bps
frank26080115	0:bf7b9fba3924	157	* 8 data bit
frank26080115	0:bf7b9fba3924	158	* No parity
frank26080115	0:bf7b9fba3924	159	* 1 stop bit
frank26080115	0:bf7b9fba3924	160	* No flow control
frank26080115	0:bf7b9fba3924	161	*/
frank26080115	0:bf7b9fba3924	162	debug_frmwrk_init();
frank26080115	0:bf7b9fba3924	163
frank26080115	0:bf7b9fba3924	164	// print welcome screen
frank26080115	0:bf7b9fba3924	165	print_menu();
frank26080115	0:bf7b9fba3924	166
frank26080115	0:bf7b9fba3924	167	/* Configuration for ADC :
frank26080115	0:bf7b9fba3924	168	* Select: ADC channel 2 (if using MCB1700 board)
frank26080115	0:bf7b9fba3924	169	* ADC channel 5 (if using IAR-LPC1768 board)
frank26080115	0:bf7b9fba3924	170	* ADC conversion rate = 200KHz
frank26080115	0:bf7b9fba3924	171	*/
frank26080115	0:bf7b9fba3924	172	ADC_Init(LPC_ADC, 200000);
frank26080115	0:bf7b9fba3924	173	ADC_IntConfig(LPC_ADC,_ADC_INT,SET);
frank26080115	0:bf7b9fba3924	174	ADC_ChannelCmd(LPC_ADC,_ADC_CHANNEL,SET);
frank26080115	0:bf7b9fba3924	175
frank26080115	0:bf7b9fba3924	176	/* GPDMA block section -------------------------------------------- */
frank26080115	0:bf7b9fba3924	177	/* Disable GPDMA interrupt */
frank26080115	0:bf7b9fba3924	178	NVIC_DisableIRQ(DMA_IRQn);
frank26080115	0:bf7b9fba3924	179	/* preemption = 1, sub-priority = 1 */
frank26080115	0:bf7b9fba3924	180	NVIC_SetPriority(DMA_IRQn, ((0x01<<3)\|0x01));
frank26080115	0:bf7b9fba3924	181
frank26080115	0:bf7b9fba3924	182	/* Initialize GPDMA controller */
frank26080115	0:bf7b9fba3924	183	GPDMA_Init();
frank26080115	0:bf7b9fba3924	184
frank26080115	0:bf7b9fba3924	185	// Setup GPDMA channel --------------------------------
frank26080115	0:bf7b9fba3924	186	// channel 0
frank26080115	0:bf7b9fba3924	187	GPDMACfg.ChannelNum = 0;
frank26080115	0:bf7b9fba3924	188	// Source memory - unused
frank26080115	0:bf7b9fba3924	189	GPDMACfg.SrcMemAddr = 0;
frank26080115	0:bf7b9fba3924	190	// Destination memory
frank26080115	0:bf7b9fba3924	191	GPDMACfg.DstMemAddr = (uint32_t) &adc_value;
frank26080115	0:bf7b9fba3924	192	// Transfer size
frank26080115	0:bf7b9fba3924	193	GPDMACfg.TransferSize = DMA_SIZE;
frank26080115	0:bf7b9fba3924	194	// Transfer width - unused
frank26080115	0:bf7b9fba3924	195	GPDMACfg.TransferWidth = 0;
frank26080115	0:bf7b9fba3924	196	// Transfer type
frank26080115	0:bf7b9fba3924	197	GPDMACfg.TransferType = GPDMA_TRANSFERTYPE_P2M;
frank26080115	0:bf7b9fba3924	198	// Source connection
frank26080115	0:bf7b9fba3924	199	GPDMACfg.SrcConn = GPDMA_CONN_ADC;
frank26080115	0:bf7b9fba3924	200	// Destination connection - unused
frank26080115	0:bf7b9fba3924	201	GPDMACfg.DstConn = 0;
frank26080115	0:bf7b9fba3924	202	// Linker List Item - unused
frank26080115	0:bf7b9fba3924	203	GPDMACfg.DMALLI = 0;
frank26080115	0:bf7b9fba3924	204	GPDMA_Setup(&GPDMACfg);
frank26080115	0:bf7b9fba3924	205
frank26080115	0:bf7b9fba3924	206	/* Reset terminal counter */
frank26080115	0:bf7b9fba3924	207	Channel0_TC = 0;
frank26080115	0:bf7b9fba3924	208	/* Reset Error counter */
frank26080115	0:bf7b9fba3924	209	Channel0_Err = 0;
frank26080115	0:bf7b9fba3924	210
frank26080115	0:bf7b9fba3924	211	/* Enable GPDMA interrupt */
frank26080115	0:bf7b9fba3924	212	NVIC_EnableIRQ(DMA_IRQn);
frank26080115	0:bf7b9fba3924	213
frank26080115	0:bf7b9fba3924	214	while (1) {
frank26080115	0:bf7b9fba3924	215
frank26080115	0:bf7b9fba3924	216	// Enable GPDMA channel 0
frank26080115	0:bf7b9fba3924	217	GPDMA_ChannelCmd(0, ENABLE);
frank26080115	0:bf7b9fba3924	218
frank26080115	0:bf7b9fba3924	219	ADC_StartCmd(LPC_ADC,ADC_START_NOW);
frank26080115	0:bf7b9fba3924	220	/* Wait for GPDMA processing complete */;
frank26080115	0:bf7b9fba3924	221	while ((Channel0_TC == 0) );
frank26080115	0:bf7b9fba3924	222
frank26080115	0:bf7b9fba3924	223	// Disable GPDMA channel 0
frank26080115	0:bf7b9fba3924	224	GPDMA_ChannelCmd(0, DISABLE);
frank26080115	0:bf7b9fba3924	225
frank26080115	0:bf7b9fba3924	226	//Display the result of conversion on the UART0
frank26080115	0:bf7b9fba3924	227	_DBG(menu2);
frank26080115	0:bf7b9fba3924	228	_DBD32(ADC_DR_RESULT(adc_value));
frank26080115	0:bf7b9fba3924	229	_DBG_("");
frank26080115	0:bf7b9fba3924	230
frank26080115	0:bf7b9fba3924	231	// Wait for a while
frank26080115	0:bf7b9fba3924	232	for(tmp = 0; tmp < 1000000; tmp++);
frank26080115	0:bf7b9fba3924	233
frank26080115	0:bf7b9fba3924	234	/* GPDMA Re-setup */
frank26080115	0:bf7b9fba3924	235	GPDMA_Setup(&GPDMACfg);
frank26080115	0:bf7b9fba3924	236
frank26080115	0:bf7b9fba3924	237	/* Reset terminal counter */
frank26080115	0:bf7b9fba3924	238	Channel0_TC = 0;
frank26080115	0:bf7b9fba3924	239	/* Reset Error counter */
frank26080115	0:bf7b9fba3924	240	Channel0_Err = 0;
frank26080115	0:bf7b9fba3924	241	}
frank26080115	0:bf7b9fba3924	242	ADC_DeInit(LPC_ADC);
frank26080115	0:bf7b9fba3924	243	return 1;
frank26080115	0:bf7b9fba3924	244	}
frank26080115	0:bf7b9fba3924	245
frank26080115	0:bf7b9fba3924	246	/* Support required entry point for other toolchain */
frank26080115	0:bf7b9fba3924	247	int main (void)
frank26080115	0:bf7b9fba3924	248	{
frank26080115	0:bf7b9fba3924	249	return c_entry();
frank26080115	0:bf7b9fba3924	250	}
frank26080115	0:bf7b9fba3924	251
frank26080115	0:bf7b9fba3924	252	#ifdef DEBUG
frank26080115	0:bf7b9fba3924	253	/*******************************************************************************
frank26080115	0:bf7b9fba3924	254	* @brief Reports the name of the source file and the source line number
frank26080115	0:bf7b9fba3924	255	* where the CHECK_PARAM error has occurred.
frank26080115	0:bf7b9fba3924	256	* @param[in] file Pointer to the source file name
frank26080115	0:bf7b9fba3924	257	* @param[in] line assert_param error line source number
frank26080115	0:bf7b9fba3924	258	* @return None
frank26080115	0:bf7b9fba3924	259	*******************************************************************************/
frank26080115	0:bf7b9fba3924	260	void check_failed(uint8_t *file, uint32_t line)
frank26080115	0:bf7b9fba3924	261	{
frank26080115	0:bf7b9fba3924	262	/* User can add his own implementation to report the file name and line number,
frank26080115	0:bf7b9fba3924	263	ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
frank26080115	0:bf7b9fba3924	264
frank26080115	0:bf7b9fba3924	265	/* Infinite loop */
frank26080115	0:bf7b9fba3924	266	while(1);
frank26080115	0:bf7b9fba3924	267	}
frank26080115	0:bf7b9fba3924	268	#endif
frank26080115	0:bf7b9fba3924	269
frank26080115	0:bf7b9fba3924	270	/*
frank26080115	0:bf7b9fba3924	271	* @}
frank26080115	0:bf7b9fba3924	272	*/

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

ADC/DMA/adc_dma_test.c@0:bf7b9fba3924, 2011-03-20 (annotated)

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