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

Users » frank26080115 » Code » LPC1700CMSIS_Examples

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

SSP/sc16is750_polling/sc16is750_polling.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 sc16is750_polling.c
frank26080115	0:bf7b9fba3924	3	* @purpose This example describes how to use SPP using polling mode,
frank26080115	0:bf7b9fba3924	4	* SSP frame format to communicate with SC16IS750/760 Demo board
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_ssp.h"
frank26080115	0:bf7b9fba3924	21	#include "lpc17xx_libcfg.h"
frank26080115	0:bf7b9fba3924	22	#include "lpc17xx_pinsel.h"
frank26080115	0:bf7b9fba3924	23	#include "debug_frmwrk.h"
frank26080115	0:bf7b9fba3924	24	#include "lpc17xx_gpio.h"
frank26080115	0:bf7b9fba3924	25
frank26080115	0:bf7b9fba3924	26	/* Example group ----------------------------------------------------------- */
frank26080115	0:bf7b9fba3924	27	/** @defgroup SSP_sc16is750_polling sc16is750_polling
frank26080115	0:bf7b9fba3924	28	* @ingroup SSP_Examples
frank26080115	0:bf7b9fba3924	29	* @{
frank26080115	0:bf7b9fba3924	30	*/
frank26080115	0:bf7b9fba3924	31
frank26080115	0:bf7b9fba3924	32
frank26080115	0:bf7b9fba3924	33	/************************ PRIVATE DEFINITIONS *********************/
frank26080115	0:bf7b9fba3924	34	// PORT number that /CS pin assigned on
frank26080115	0:bf7b9fba3924	35	#define CS_PORT_NUM 0
frank26080115	0:bf7b9fba3924	36	// PIN number that /CS pin assigned on
frank26080115	0:bf7b9fba3924	37	#define CS_PIN_NUM 16
frank26080115	0:bf7b9fba3924	38
frank26080115	0:bf7b9fba3924	39	// Define macro used in command when using SSP with SC16IS740
frank26080115	0:bf7b9fba3924	40	#define SC16IS740_WR_CMD(x) ((uint8_t) (x << 3))
frank26080115	0:bf7b9fba3924	41	#define SC16IS740_RD_CMD(x) ((uint8_t) ((x << 3) \| 0x80))
frank26080115	0:bf7b9fba3924	42
frank26080115	0:bf7b9fba3924	43	// Define register address of SC16IS740
frank26080115	0:bf7b9fba3924	44	#define SC16IS740_IODIR_REG 0x0A
frank26080115	0:bf7b9fba3924	45	#define SC16IS740_IOSTATE_REG 0x0B
frank26080115	0:bf7b9fba3924	46	#define SC16IS740_IOCON_REG 0x0E
frank26080115	0:bf7b9fba3924	47
frank26080115	0:bf7b9fba3924	48
frank26080115	0:bf7b9fba3924	49	/************************ PRIVATE VARIABLES ***********************/
frank26080115	0:bf7b9fba3924	50	uint8_t menu1[] =
frank26080115	0:bf7b9fba3924	51	"********************************************************************************\n\r"
frank26080115	0:bf7b9fba3924	52	"Hello NXP Semiconductors \n\r"
frank26080115	0:bf7b9fba3924	53	"SSP demo \n\r"
frank26080115	0:bf7b9fba3924	54	"\t - MCU: LPC17xx \n\r"
frank26080115	0:bf7b9fba3924	55	"\t - Core: ARM Cortex-M3 \n\r"
frank26080115	0:bf7b9fba3924	56	"\t - Communicate via: UART0 - 9.6 kbps \n\r"
frank26080115	0:bf7b9fba3924	57	" Communicate with SSP0 function on SC16IS750/760 Demo Board\n\r"
frank26080115	0:bf7b9fba3924	58	" in polling mode\n\r"
frank26080115	0:bf7b9fba3924	59	" Use IO function on SC16IS740/750/760 chip to turn ON/OFF LEDs\n\r"
frank26080115	0:bf7b9fba3924	60	" Press '1' to turn ON LEDs, '2' to turn OFF LEDs \n\r"
frank26080115	0:bf7b9fba3924	61	"********************************************************************************\n\r";
frank26080115	0:bf7b9fba3924	62	uint8_t menu2[] = "Demo terminated! \n\r";
frank26080115	0:bf7b9fba3924	63
frank26080115	0:bf7b9fba3924	64	// SSP Configuration structure variable
frank26080115	0:bf7b9fba3924	65	SSP_CFG_Type SSP_ConfigStruct;
frank26080115	0:bf7b9fba3924	66
frank26080115	0:bf7b9fba3924	67	uint8_t iocon_cfg[2] = {SC16IS740_WR_CMD(SC16IS740_IOCON_REG), 0x00};
frank26080115	0:bf7b9fba3924	68	uint8_t iodir_cfg[2] = {SC16IS740_WR_CMD(SC16IS740_IODIR_REG), 0xFF};
frank26080115	0:bf7b9fba3924	69	uint8_t iostate_on[2] = {SC16IS740_WR_CMD(SC16IS740_IOSTATE_REG), 0x00};
frank26080115	0:bf7b9fba3924	70	uint8_t iostate_off[2] = {SC16IS740_WR_CMD(SC16IS740_IOSTATE_REG), 0xFF};
frank26080115	0:bf7b9fba3924	71	uint8_t sspreadbuf[2];
frank26080115	0:bf7b9fba3924	72
frank26080115	0:bf7b9fba3924	73	/************************ PRIVATE FUNCTIONS ***********************/
frank26080115	0:bf7b9fba3924	74	void CS_Init(void);
frank26080115	0:bf7b9fba3924	75	void CS_Force(int32_t state);
frank26080115	0:bf7b9fba3924	76	void print_menu(void);
frank26080115	0:bf7b9fba3924	77
frank26080115	0:bf7b9fba3924	78	/-------------------------PRIVATE FUNCTIONS------------------------------/
frank26080115	0:bf7b9fba3924	79	/*******************************************************************//
frank26080115	0:bf7b9fba3924	80	* @brief Initialize CS pin as GPIO function to drive /CS pin
frank26080115	0:bf7b9fba3924	81	* due to definition of CS_PORT_NUM and CS_PORT_NUM
frank26080115	0:bf7b9fba3924	82	* @param None
frank26080115	0:bf7b9fba3924	83	* @return None
frank26080115	0:bf7b9fba3924	84	***********************************************************************/
frank26080115	0:bf7b9fba3924	85	void CS_Init(void)
frank26080115	0:bf7b9fba3924	86	{
frank26080115	0:bf7b9fba3924	87	GPIO_SetDir(CS_PORT_NUM, (1<<CS_PIN_NUM), 1);
frank26080115	0:bf7b9fba3924	88	GPIO_SetValue(CS_PORT_NUM, (1<<CS_PIN_NUM));
frank26080115	0:bf7b9fba3924	89	}
frank26080115	0:bf7b9fba3924	90
frank26080115	0:bf7b9fba3924	91
frank26080115	0:bf7b9fba3924	92	/*******************************************************************//
frank26080115	0:bf7b9fba3924	93	* @brief Drive CS output pin to low/high level to select slave device
frank26080115	0:bf7b9fba3924	94	* via /CS pin state
frank26080115	0:bf7b9fba3924	95	* @param[in] state State of CS output pin that will be driven:
frank26080115	0:bf7b9fba3924	96	* - 0: Drive CS pin to low level
frank26080115	0:bf7b9fba3924	97	* - 1: Drive CS pin to high level
frank26080115	0:bf7b9fba3924	98	* @return None
frank26080115	0:bf7b9fba3924	99	***********************************************************************/
frank26080115	0:bf7b9fba3924	100	void CS_Force(int32_t state)
frank26080115	0:bf7b9fba3924	101	{
frank26080115	0:bf7b9fba3924	102	if (state){
frank26080115	0:bf7b9fba3924	103	GPIO_SetValue(CS_PORT_NUM, (1<<CS_PIN_NUM));
frank26080115	0:bf7b9fba3924	104	}else{
frank26080115	0:bf7b9fba3924	105	GPIO_ClearValue(CS_PORT_NUM, (1<<CS_PIN_NUM));
frank26080115	0:bf7b9fba3924	106	}
frank26080115	0:bf7b9fba3924	107	}
frank26080115	0:bf7b9fba3924	108
frank26080115	0:bf7b9fba3924	109
frank26080115	0:bf7b9fba3924	110	/*******************************************************************//
frank26080115	0:bf7b9fba3924	111	* @brief Print Welcome menu
frank26080115	0:bf7b9fba3924	112	* @param[in] none
frank26080115	0:bf7b9fba3924	113	* @return None
frank26080115	0:bf7b9fba3924	114	**********************************************************************/
frank26080115	0:bf7b9fba3924	115	void print_menu(void)
frank26080115	0:bf7b9fba3924	116	{
frank26080115	0:bf7b9fba3924	117	_DBG(menu1);
frank26080115	0:bf7b9fba3924	118	}
frank26080115	0:bf7b9fba3924	119
frank26080115	0:bf7b9fba3924	120	/-------------------------MAIN FUNCTION------------------------------/
frank26080115	0:bf7b9fba3924	121	/*******************************************************************//
frank26080115	0:bf7b9fba3924	122	* @brief c_entry: Main SSP program body
frank26080115	0:bf7b9fba3924	123	* @param[in] None
frank26080115	0:bf7b9fba3924	124	* @return int
frank26080115	0:bf7b9fba3924	125	**********************************************************************/
frank26080115	0:bf7b9fba3924	126	int c_entry(void)
frank26080115	0:bf7b9fba3924	127	{
frank26080115	0:bf7b9fba3924	128	uint8_t tmpchar[2] = {0, 0};
frank26080115	0:bf7b9fba3924	129	PINSEL_CFG_Type PinCfg;
frank26080115	0:bf7b9fba3924	130	__IO FlagStatus exitflag;
frank26080115	0:bf7b9fba3924	131	SSP_DATA_SETUP_Type xferConfig;
frank26080115	0:bf7b9fba3924	132
frank26080115	0:bf7b9fba3924	133	/*
frank26080115	0:bf7b9fba3924	134	* Initialize SPI pin connect
frank26080115	0:bf7b9fba3924	135	* P0.15 - SCK
frank26080115	0:bf7b9fba3924	136	* P0.16 - SSEL - used as GPIO
frank26080115	0:bf7b9fba3924	137	* P0.17 - MISO
frank26080115	0:bf7b9fba3924	138	* P0.18 - MOSI
frank26080115	0:bf7b9fba3924	139	*/
frank26080115	0:bf7b9fba3924	140	PinCfg.Funcnum = 2;
frank26080115	0:bf7b9fba3924	141	PinCfg.OpenDrain = 0;
frank26080115	0:bf7b9fba3924	142	PinCfg.Pinmode = 0;
frank26080115	0:bf7b9fba3924	143	PinCfg.Portnum = 0;
frank26080115	0:bf7b9fba3924	144	PinCfg.Pinnum = 15;
frank26080115	0:bf7b9fba3924	145	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	146	PinCfg.Pinnum = 17;
frank26080115	0:bf7b9fba3924	147	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	148	PinCfg.Pinnum = 18;
frank26080115	0:bf7b9fba3924	149	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	150	PinCfg.Pinnum = 16;
frank26080115	0:bf7b9fba3924	151	PinCfg.Funcnum = 0;
frank26080115	0:bf7b9fba3924	152	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	153
frank26080115	0:bf7b9fba3924	154	/* Initialize debug via UART0
frank26080115	0:bf7b9fba3924	155	* 115200bps
frank26080115	0:bf7b9fba3924	156	* 8 data bit
frank26080115	0:bf7b9fba3924	157	* No parity
frank26080115	0:bf7b9fba3924	158	* 1 stop bit
frank26080115	0:bf7b9fba3924	159	* No flow control
frank26080115	0:bf7b9fba3924	160	*/
frank26080115	0:bf7b9fba3924	161	debug_frmwrk_init();
frank26080115	0:bf7b9fba3924	162
frank26080115	0:bf7b9fba3924	163	// print welcome screen
frank26080115	0:bf7b9fba3924	164	print_menu();
frank26080115	0:bf7b9fba3924	165
frank26080115	0:bf7b9fba3924	166	// initialize SSP configuration structure to default
frank26080115	0:bf7b9fba3924	167	SSP_ConfigStructInit(&SSP_ConfigStruct);
frank26080115	0:bf7b9fba3924	168	// Initialize SSP peripheral with parameter given in structure above
frank26080115	0:bf7b9fba3924	169	SSP_Init(LPC_SSP0, &SSP_ConfigStruct);
frank26080115	0:bf7b9fba3924	170
frank26080115	0:bf7b9fba3924	171	// Initialize /CS pin to GPIO function
frank26080115	0:bf7b9fba3924	172	CS_Init();
frank26080115	0:bf7b9fba3924	173
frank26080115	0:bf7b9fba3924	174	// Enable SSP peripheral
frank26080115	0:bf7b9fba3924	175	SSP_Cmd(LPC_SSP0, ENABLE);
frank26080115	0:bf7b9fba3924	176
frank26080115	0:bf7b9fba3924	177	/* First, send some command to reset SC16IS740 chip via SSP bus interface
frank26080115	0:bf7b9fba3924	178	* note driver /CS pin to low state before transferring by CS_Enable() function
frank26080115	0:bf7b9fba3924	179	*/
frank26080115	0:bf7b9fba3924	180	CS_Force(0);
frank26080115	0:bf7b9fba3924	181	xferConfig.tx_data = iocon_cfg;
frank26080115	0:bf7b9fba3924	182	xferConfig.rx_data = sspreadbuf;
frank26080115	0:bf7b9fba3924	183	xferConfig.length = sizeof (iocon_cfg);
frank26080115	0:bf7b9fba3924	184	SSP_ReadWrite(LPC_SSP0, &xferConfig, SSP_TRANSFER_POLLING);
frank26080115	0:bf7b9fba3924	185	CS_Force(1);
frank26080115	0:bf7b9fba3924	186
frank26080115	0:bf7b9fba3924	187	CS_Force(0);
frank26080115	0:bf7b9fba3924	188	xferConfig.tx_data = iodir_cfg;
frank26080115	0:bf7b9fba3924	189	xferConfig.rx_data = sspreadbuf;
frank26080115	0:bf7b9fba3924	190	xferConfig.length = sizeof (iodir_cfg);
frank26080115	0:bf7b9fba3924	191	SSP_ReadWrite(LPC_SSP0, &xferConfig, SSP_TRANSFER_POLLING);
frank26080115	0:bf7b9fba3924	192	CS_Force(1);
frank26080115	0:bf7b9fba3924	193
frank26080115	0:bf7b9fba3924	194	// Reset exit flag
frank26080115	0:bf7b9fba3924	195	exitflag = RESET;
frank26080115	0:bf7b9fba3924	196
frank26080115	0:bf7b9fba3924	197	/* Read some data from the buffer */
frank26080115	0:bf7b9fba3924	198	while (exitflag == RESET)
frank26080115	0:bf7b9fba3924	199	{
frank26080115	0:bf7b9fba3924	200	while((tmpchar[0] = _DG) == 0);
frank26080115	0:bf7b9fba3924	201
frank26080115	0:bf7b9fba3924	202	if (tmpchar[0] == 27){
frank26080115	0:bf7b9fba3924	203	/* ESC key, set exit flag */
frank26080115	0:bf7b9fba3924	204	_DBG_(menu2);
frank26080115	0:bf7b9fba3924	205	exitflag = SET;
frank26080115	0:bf7b9fba3924	206	}
frank26080115	0:bf7b9fba3924	207	else if (tmpchar[0] == 'r'){
frank26080115	0:bf7b9fba3924	208	print_menu();
frank26080115	0:bf7b9fba3924	209	} else {
frank26080115	0:bf7b9fba3924	210	if (tmpchar[0] == '1')
frank26080115	0:bf7b9fba3924	211	{
frank26080115	0:bf7b9fba3924	212	// LEDs are ON now...
frank26080115	0:bf7b9fba3924	213	CS_Force(0);
frank26080115	0:bf7b9fba3924	214	xferConfig.tx_data = iostate_on;
frank26080115	0:bf7b9fba3924	215	xferConfig.rx_data = sspreadbuf;
frank26080115	0:bf7b9fba3924	216	xferConfig.length = sizeof (iostate_on);
frank26080115	0:bf7b9fba3924	217	SSP_ReadWrite(LPC_SSP0, &xferConfig, SSP_TRANSFER_POLLING);
frank26080115	0:bf7b9fba3924	218	CS_Force(1);
frank26080115	0:bf7b9fba3924	219	}
frank26080115	0:bf7b9fba3924	220	else if (tmpchar[0] == '2')
frank26080115	0:bf7b9fba3924	221	{
frank26080115	0:bf7b9fba3924	222	// LEDs are OFF now...
frank26080115	0:bf7b9fba3924	223	CS_Force(0);
frank26080115	0:bf7b9fba3924	224	xferConfig.tx_data = iostate_off;
frank26080115	0:bf7b9fba3924	225	xferConfig.rx_data = sspreadbuf;
frank26080115	0:bf7b9fba3924	226	xferConfig.length = sizeof (iostate_off);
frank26080115	0:bf7b9fba3924	227	SSP_ReadWrite(LPC_SSP0, &xferConfig, SSP_TRANSFER_POLLING);
frank26080115	0:bf7b9fba3924	228	CS_Force(1);
frank26080115	0:bf7b9fba3924	229	}
frank26080115	0:bf7b9fba3924	230	/* Then Echo it back */
frank26080115	0:bf7b9fba3924	231	_DBG_(tmpchar);
frank26080115	0:bf7b9fba3924	232	}
frank26080115	0:bf7b9fba3924	233	}
frank26080115	0:bf7b9fba3924	234
frank26080115	0:bf7b9fba3924	235	// wait for current transmission complete - THR must be empty
frank26080115	0:bf7b9fba3924	236	while (UART_CheckBusy(LPC_UART0) == SET);
frank26080115	0:bf7b9fba3924	237
frank26080115	0:bf7b9fba3924	238	// DeInitialize UART0 peripheral
frank26080115	0:bf7b9fba3924	239	UART_DeInit(LPC_UART0);
frank26080115	0:bf7b9fba3924	240
frank26080115	0:bf7b9fba3924	241	/* Loop forever */
frank26080115	0:bf7b9fba3924	242	while(1);
frank26080115	0:bf7b9fba3924	243	return 1;
frank26080115	0:bf7b9fba3924	244	}
frank26080115	0:bf7b9fba3924	245
frank26080115	0:bf7b9fba3924	246	/* With ARM and GHS toolsets, the entry point is main() - this will
frank26080115	0:bf7b9fba3924	247	allow the linker to generate wrapper code to setup stacks, allocate
frank26080115	0:bf7b9fba3924	248	heap area, and initialize and copy code and data segments. For GNU
frank26080115	0:bf7b9fba3924	249	toolsets, the entry point is through __start() in the crt0_gnu.asm
frank26080115	0:bf7b9fba3924	250	file, and that startup code will setup stacks and data */
frank26080115	0:bf7b9fba3924	251	int main(void)
frank26080115	0:bf7b9fba3924	252	{
frank26080115	0:bf7b9fba3924	253	return c_entry();
frank26080115	0:bf7b9fba3924	254	}
frank26080115	0:bf7b9fba3924	255
frank26080115	0:bf7b9fba3924	256
frank26080115	0:bf7b9fba3924	257	#ifdef DEBUG
frank26080115	0:bf7b9fba3924	258	/*******************************************************************************
frank26080115	0:bf7b9fba3924	259	* @brief Reports the name of the source file and the source line number
frank26080115	0:bf7b9fba3924	260	* where the CHECK_PARAM error has occurred.
frank26080115	0:bf7b9fba3924	261	* @param[in] file Pointer to the source file name
frank26080115	0:bf7b9fba3924	262	* @param[in] line assert_param error line source number
frank26080115	0:bf7b9fba3924	263	* @return None
frank26080115	0:bf7b9fba3924	264	*******************************************************************************/
frank26080115	0:bf7b9fba3924	265	void check_failed(uint8_t *file, uint32_t line)
frank26080115	0:bf7b9fba3924	266	{
frank26080115	0:bf7b9fba3924	267	/* User can add his own implementation to report the file name and line number,
frank26080115	0:bf7b9fba3924	268	ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
frank26080115	0:bf7b9fba3924	269
frank26080115	0:bf7b9fba3924	270	/* Infinite loop */
frank26080115	0:bf7b9fba3924	271	while(1);
frank26080115	0:bf7b9fba3924	272	}
frank26080115	0:bf7b9fba3924	273	#endif
frank26080115	0:bf7b9fba3924	274
frank26080115	0:bf7b9fba3924	275	/*
frank26080115	0:bf7b9fba3924	276	* @}
frank26080115	0:bf7b9fba3924	277	*/

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

SSP/sc16is750_polling/sc16is750_polling.c@0:bf7b9fba3924, 2011-03-20 (annotated)

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