File content as of revision 0:bf7b9fba3924:

/***********************************************************************//**
 * @file		pca8581_test.c
 * @purpose		An example of I2C using polling mode to test the I2C driver.
 * 				Using EEPROM PCA8581 to transfer a number of data byte.
 * @version		2.0
 * @date		21. May. 2010
 * @author		NXP MCU SW Application Team
 *---------------------------------------------------------------------
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * products. This software is supplied "AS IS" without any warranties.
 * NXP Semiconductors assumes no responsibility or liability for the
 * use of the software, conveys no license or title under any patent,
 * copyright, or mask work right to the product. NXP Semiconductors
 * reserves the right to make changes in the software without
 * notification. NXP Semiconductors also make no representation or
 * warranty that such application will be suitable for the specified
 * use without further testing or modification.
 **********************************************************************/
#include "lpc17xx_i2c.h"
#include "lpc17xx_libcfg.h"
#include "lpc17xx_pinsel.h"
#include "debug_frmwrk.h"

/* Example group ----------------------------------------------------------- */
/** @defgroup I2C_pca8581_polling	pca8581_polling
 * @ingroup I2C_Examples
 * @{
 */

/************************** PRIVATE DEFINITIONS *************************/
/** Used I2C device definition, should be 0 or 2 */
#define USEDI2CDEV	0

/* Definition of internal register of EEPROM PCA8581 */
/* 7 bit address */
#define PCA8581_SLVADDR		(0xA0>>1)

#if (USEDI2CDEV == 0)
#define I2CDEV LPC_I2C0
#elif (USEDI2CDEV == 2)
#define I2CDEV LPC_I2C2
#else
#error "I2C device not defined!"
#endif


/************************** PRIVATE VARIABLES *************************/
uint8_t menu1[] =
"********************************************************************************\n\r"
"Hello NXP Semiconductors \n\r"
"I2C demo \n\r"
"\t - MCU: LPC17xx \n\r"
"\t - Core: ARM Cortex-M3 \n\r"
"\t - Communicate via: UART0 - 115.2 kbps \n\r"
" An example of I2C using polling mode to test the I2C driver \n\r"
" EEPROM PCA8581 to transfer a number of data byte \n\r"
"********************************************************************************\n\r";
uint8_t menu2[] = "Demo terminated! \n\r";

/* Data using for transferring to PCA8581 */
uint8_t pca8581_wrdat[] = {
		(0x01<<3),	// Memory Address, data will be written at this address
					// This internal memory address should be 8-byte alignment
		0x00,	// Data 0
		0x11,	// Data 1
		0x22,	// Data 2
		0x33,	// Data 3
		0x44,	// Data 4
		0x55,	// Data 5
		0x66,	// Data 6
		0x77,	// Data 7
};

uint8_t pca8581_rddat[] = {
		// Don't use Memory address here, the Memory address to read
		// is the same as Memory Address to write.
		0x00,	// Data 0
		0x00,	// Data 1
		0x00,	// Data 2
		0x00,	// Data 3
		0x00,	// Data 4
		0x00,	// Data 5
		0x00,	// Data 6
		0x00,	// Data 7
};

/* Transmit setup */
I2C_M_SETUP_Type txsetup;
/* Receive setup */
I2C_M_SETUP_Type rxsetup;

/************************** PRIVATE FUNCTIONS *************************/
int32_t PCA8581_Write(void);
int32_t PCA8581_Read(void);
void print_menu(void);
void Error_Loop(uint32_t ErrorCode);

/*-------------------------PRIVATE FUNCTIONS------------------------------*/
/*********************************************************************//**
 * @brief		Write a number of data byte into EEPROM PCA8581
 * @param[in]	None
 * @return 		0: if success, otherwise (-1) returned.
 **********************************************************************/
int32_t PCA8581_Write(void)
{
	txsetup.sl_addr7bit = PCA8581_SLVADDR;
	txsetup.tx_data = pca8581_wrdat;
	txsetup.tx_length = sizeof(pca8581_wrdat);
	txsetup.rx_data = NULL;
	txsetup.rx_length = 0;
	txsetup.retransmissions_max = 3;

	if (I2C_MasterTransferData(I2CDEV, &txsetup, I2C_TRANSFER_POLLING) == SUCCESS){
		return (0);
	} else {
		return (-1);
	}
}

/*********************************************************************//**
 * @brief		Read a number of data byte from EEPROM PCA8581
 * @param[in]	None
 * @return 		0: if success, otherwise (-1) returned.
 **********************************************************************/
int32_t PCA8581_Read(void)
{

	rxsetup.sl_addr7bit = PCA8581_SLVADDR;
	rxsetup.tx_data = pca8581_wrdat;	// Get address to read at writing address
	rxsetup.tx_length = 1;
	rxsetup.rx_data = pca8581_rddat;
	rxsetup.rx_length = sizeof(pca8581_rddat);
	rxsetup.retransmissions_max = 3;

	if (I2C_MasterTransferData(I2CDEV, &rxsetup, I2C_TRANSFER_POLLING) == SUCCESS){
		return (0);
	} else {
		return (-1);
	}
}

/*********************************************************************//**
 * @brief		Print Welcome menu
 * @param[in]	none
 * @return 		None
 **********************************************************************/
void print_menu(void)
{
	_DBG_(menu1);
}

/*********************************************************************//**
 * @brief		A subroutine that will be called if there's any error
 * 				on I2C operation
 * @param[in]	ErrorCode Error Code Input
 * @return 		None
 **********************************************************************/
void Error_Loop(uint32_t ErrorCode)
{
        uint32_t test;
	// for testing purpose
	test = ErrorCode;
	/*
	 * Insert your code here...
	 */
	while(1);
}


/*-------------------------MAIN FUNCTION------------------------------*/
/*********************************************************************//**
 * @brief		c_entry: Main program body
 * @param[in]	None
 * @return 		int
 **********************************************************************/
int c_entry(void)
{
	PINSEL_CFG_Type PinCfg;
	uint32_t tmp;
	uint8_t *dp, *sp;

	/* Initialize debug via UART0
	 * – 115200bps
	 * – 8 data bit
	 * – No parity
	 * – 1 stop bit
	 * – No flow control
	 */
	debug_frmwrk_init();

	// print welcome screen
	print_menu();

	/*
	 * Init I2C pin connect
	 */
	PinCfg.OpenDrain = 0;
	PinCfg.Pinmode = 0;
#if (USEDI2CDEV == 0)
	PinCfg.Funcnum = 1;
	PinCfg.Pinnum = 27;
	PinCfg.Portnum = 0;
	PINSEL_ConfigPin(&PinCfg);
	PinCfg.Pinnum = 28;
	PINSEL_ConfigPin(&PinCfg);
#elif (USEDI2CDEV == 2)
	PinCfg.Funcnum = 2;
	PinCfg.Pinnum = 10;
	PinCfg.Portnum = 0;
	PINSEL_ConfigPin(&PinCfg);
	PinCfg.Pinnum = 11;
	PINSEL_ConfigPin(&PinCfg);
#endif

	/* I2C block ------------------------------------------------------------------- */
	// Initialize I2C peripheral
	I2C_Init(I2CDEV, 200000);

	/* Enable I2C1 operation */
	I2C_Cmd(I2CDEV, ENABLE);

	/* Transmit data ---------------------------------------------------------- */
	_DBG_("Sending...");
	if (PCA8581_Write() == (-1)){
		_DBG_("Error while sending data");
		Error_Loop(txsetup.status);
	}
	_DBG_("Complete!");

	// wait for a while
	for (tmp = 0x100000; tmp; tmp--);

	/* Receive data ---------------------------------------------------------- */
	_DBG_("Reading...");
	if (PCA8581_Read() == (-1)){
		_DBG_("Error while reading data");
		Error_Loop(rxsetup.status);
	}
	_DBG_("Complete!");

	// Verify data
	dp = pca8581_rddat;
	sp = pca8581_wrdat;
	sp += 1;  // Offset +1
	for (tmp = sizeof(pca8581_rddat); tmp; tmp--){
		if (*dp++ != *sp++){
			_DBG_("Verify Data error!");
			break;
		}
	}

	tmp++;

    /* Loop forever */
    while(1);
    return 1;
}

/* With ARM and GHS toolsets, the entry point is main() - this will
   allow the linker to generate wrapper code to setup stacks, allocate
   heap area, and initialize and copy code and data segments. For GNU
   toolsets, the entry point is through __start() in the crt0_gnu.asm
   file, and that startup code will setup stacks and data */
int main(void)
{
    return c_entry();
}


#ifdef  DEBUG
/*******************************************************************************
* @brief		Reports the name of the source file and the source line number
* 				where the CHECK_PARAM error has occurred.
* @param[in]	file Pointer to the source file name
* @param[in]    line assert_param error line source number
* @return		None
*******************************************************************************/
void check_failed(uint8_t *file, uint32_t line)
{
	/* User can add his own implementation to report the file name and line number,
	 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

	/* Infinite loop */
	while(1);
}
#endif

/*
 * @}
 */