Diff: I2C/pca8581_polling/pca8581_test.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2C/pca8581_polling/pca8581_test.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,291 @@
+/***********************************************************************//**
+ * @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
+
+/*
+ * @}
+ */