Diff: I2C/master/master.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2C/master/master.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,276 @@
+/***********************************************************************//**
+ * @file		master.c
+ * @purpose		This example describes how to configure I2C as master device
+ * @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_master	master
+ * @ingroup I2C_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINITIONS *************************/
+/** Used I2C device as slave definition */
+#define USEDI2CDEV_M		0
+/** Own Slave address in Slave I2C device */
+#define I2CDEV_S_ADDR	(0x90>>1)
+
+/** Max buffer length */
+#define BUFFER_SIZE			0x10
+
+#if (USEDI2CDEV_M == 0)
+#define I2CDEV_M LPC_I2C0
+#elif (USEDI2CDEV_M == 2)
+#define I2CDEV_M LPC_I2C2
+#else
+#error "Master 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 - This example uses two I2C peripheral, one set as master and \n\r"
+"\t the other set as slave \n\r"
+"\t Test Master mode as alone device \n\r"
+"********************************************************************************\n\r";
+
+/** These global variables below used in interrupt mode - Slave device ----------------*/
+uint8_t Master_Buf[BUFFER_SIZE];
+uint8_t master_test[2];
+
+/************************** PRIVATE FUNCTIONS *************************/
+void print_menu(void);
+void Buffer_Init(uint8_t type);
+
+/*-------------------------PRIVATE FUNCTIONS-----------------------------*/
+/*********************************************************************//**
+ * @brief		Print Welcome menu
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void print_menu(void)
+{
+	_DBG_(menu1);
+}
+
+/*********************************************************************//**
+ * @brief		Initialize buffer
+ * @param[in]	type:
+ * 				- 0: Initialize Master_Buf with increment value from 0
+ * 					Fill all member in Slave_Buf with 0
+ * 				- 1: Initialize Slave_Buf with increment value from 0
+ * 					Fill all member in Master_Buf with 0
+ * @return 		None
+ **********************************************************************/
+void Buffer_Init(uint8_t type)
+{
+	uint8_t i;
+
+	if (type)
+	{
+		for (i = 0; i < BUFFER_SIZE; i++) {
+			Master_Buf[i] = i;
+		}
+	}
+	else
+	{
+		for (i = 0; i < BUFFER_SIZE; i++) {
+			Master_Buf[i] = 0;
+		}
+	}
+}
+
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	PINSEL_CFG_Type PinCfg;
+	I2C_M_SETUP_Type transferMCfg;
+	uint32_t tempp;
+	uint8_t *pdat;
+
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	print_menu();
+
+
+	/* I2C block ------------------------------------------------------------------- */
+
+	/*
+	 * Init I2C pin connect
+	 */
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+#if ((USEDI2CDEV_M == 0))
+	PinCfg.Funcnum = 1;
+	PinCfg.Pinnum = 27;
+	PinCfg.Portnum = 0;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 28;
+	PINSEL_ConfigPin(&PinCfg);
+#endif
+#if ((USEDI2CDEV_M == 2))
+	PinCfg.Funcnum = 2;
+	PinCfg.Pinnum = 10;
+	PinCfg.Portnum = 0;
+	PINSEL_ConfigPin(&PinCfg);
+	PinCfg.Pinnum = 11;
+	PINSEL_ConfigPin(&PinCfg);
+#endif
+
+	// Initialize Slave I2C peripheral
+	I2C_Init(I2CDEV_M, 100000);
+
+	/* Enable Slave I2C operation */
+	I2C_Cmd(I2CDEV_M, ENABLE);
+
+	/* Transmit -------------------------------------------------------- */
+	_DBG_("Press '1' to transmit");
+	while (_DG != '1');
+	_DBG_("Start Transmit...");
+
+	/* Initialize buffer */
+	Buffer_Init(1);
+
+	/* Start I2C slave device first */
+	transferMCfg.sl_addr7bit = I2CDEV_S_ADDR;
+	transferMCfg.tx_data = Master_Buf;
+	transferMCfg.tx_length = sizeof(Master_Buf);
+	transferMCfg.rx_data = NULL;
+	transferMCfg.rx_length = 0;
+	transferMCfg.retransmissions_max = 3;
+	I2C_MasterTransferData(I2CDEV_M, &transferMCfg, I2C_TRANSFER_POLLING);
+
+
+	/* Receive -------------------------------------------------------- */
+	_DBG_("Press '2' to receive");
+	while(_DG != '2');
+	_DBG_("Receive...");
+
+	/* Initialize buffer */
+	Buffer_Init(0);
+
+	/* Start I2C slave device first */
+	transferMCfg.sl_addr7bit = I2CDEV_S_ADDR;
+	transferMCfg.tx_data = NULL ;
+	transferMCfg.tx_length = 0;
+	transferMCfg.rx_data = Master_Buf;
+	transferMCfg.rx_length = sizeof(Master_Buf);
+	transferMCfg.retransmissions_max = 3;
+	I2C_MasterTransferData(I2CDEV_M, &transferMCfg, I2C_TRANSFER_POLLING);
+
+	pdat = Master_Buf;
+	// Verify
+	for (tempp = 0; tempp < sizeof(Master_Buf); tempp++){
+		if (*pdat++ != tempp){
+			_DBG_("Verify error");
+			break;
+		}
+	}
+	if (tempp == sizeof(Master_Buf)){
+		_DBG_("Verify successfully");
+	}
+
+#if 1
+	/* Transmit and receive -------------------------------------------------------- */
+	_DBG_("Press '3' to Transmit, then repeat start and receive...");
+	while (_DG != '3');
+
+	/* Initialize buffer */
+	Buffer_Init(0);
+	master_test[0] = 0xAA;
+	master_test[1] = 0x55;
+
+	/* Start I2C slave device first */
+	transferMCfg.sl_addr7bit = I2CDEV_S_ADDR;
+	transferMCfg.tx_data = master_test ;
+	transferMCfg.tx_length = sizeof(master_test);
+	transferMCfg.rx_data = Master_Buf;
+	transferMCfg.rx_length = sizeof(Master_Buf);
+	transferMCfg.retransmissions_max = 3;
+	I2C_MasterTransferData(I2CDEV_M, &transferMCfg, I2C_TRANSFER_POLLING);
+#endif
+
+	pdat = Master_Buf;
+	// Verify
+	for (tempp = 0; tempp < sizeof(Master_Buf); tempp++){
+		if (*pdat++ != tempp){
+			_DBG_("Verify error");
+			break;
+		}
+	}
+	if (tempp == sizeof(Master_Buf)){
+		_DBG_("Verify successfully");
+	}
+	I2C_DeInit(I2CDEV_M);
+    /* 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
+
+/*
+ * @}
+ */