Diff: I2C/Monitor/i2c_monitor.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2C/Monitor/i2c_monitor.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,230 @@
+/******************** (C) COPYRIGHT 2010 NXPSemiconductors ************
+ * @file		i2c_monitor.c
+ * @purpose		This example describes how to uses I2C peripheral on LPC1768
+ * 			  	in monitor mode.
+ * @version		1.0
+ * @date		16. July. 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_Monitor		Monitor
+ * @ingroup I2C_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINITIONS *************************/
+#define I2CDEV LPC_I2C0
+
+/** Max buffer length */
+#define BUFFER_SIZE			0x80
+/************************** PRIVATE VARIABLES *************************/
+uint8_t menu1[] =
+"********************************************************************************\n\r"
+"Hello NXP Semiconductors \n\r"
+"I2C monitor I2C bus demo \n\r"
+"\t - MCU: LPC17xx \n\r"
+"\t - Core: ARM Cortex-M3 \n\r"
+"\t - This example describes how to uses I2C peripheral on LPC1768 \n\r"
+"\t in monitor mode. \n\r"
+"\t I2C0 monitors I2C data transfered on I2C bus. \n\r"
+"\t UART0 (115200bps, 8 data bit, no parity, 1 stop bit, no flow control) \n\r"
+"\t is used to display captured data. \n\r"
+"********************************************************************************\n\r";
+uint8_t buffer[BUFFER_SIZE];
+BOOL_8 done=FALSE;
+uint32_t count=0;
+
+/************************** PRIVATE FUNCTIONS *************************/
+void I2C0_IRQHandler(void);
+void print_menu(void);
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+/*********************************************************************//**
+ * @brief 		Main I2C0 interrupt handler sub-routine
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void I2C0_IRQHandler(void)
+{
+	done = I2C_MonitorHandler(LPC_I2C0,buffer,count);
+	if(done)
+	{
+		I2C_MonitorModeConfig(I2CDEV,(uint32_t)I2C_MONITOR_CFG_MATCHALL, DISABLE);
+		I2C_MonitorModeCmd(I2CDEV, DISABLE);
+	}
+}
+
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+/*********************************************************************//**
+ * @brief		Print Welcome menu
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void print_menu(void)
+{
+	_DBG(menu1);
+}
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	PINSEL_CFG_Type PinCfg;
+	uint8_t idx,i;
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	//print menu screen
+	print_menu();
+
+	/* I2C block ------------------------------------------------------------------- */
+
+	/*
+	 * Init I2C pin connect
+	 */
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+	PinCfg.Funcnum = 1;
+	PinCfg.Pinnum = 27;
+	PinCfg.Portnum = 0;
+	PINSEL_ConfigPin(&PinCfg);//SDA0
+	PinCfg.Pinnum = 28;
+	PINSEL_ConfigPin(&PinCfg);//SCL0
+
+	// Initialize I2C peripheral
+	I2C_Init(I2CDEV, 100000);
+
+	/* Configure interrupt for I2C in NVIC of ARM core */
+    /* Disable I2C0 interrupt */
+    NVIC_DisableIRQ(I2C0_IRQn);
+    /* preemption = 1, sub-priority = 0 */
+    NVIC_SetPriority(I2C0_IRQn, ((0x01<<3)|0x01));
+    //enable I2C interrupt
+    I2C_IntCmd(LPC_I2C0, ENABLE);
+
+	/* Enable I2C operation */
+	I2C_Cmd(I2CDEV, ENABLE);
+
+	while(1)
+	{
+		idx=0;count=0;
+		while(idx<2)
+		{
+			if(idx==0)
+			{
+				_DBG_("\n\rEnter monitor buffer size: ");
+			}
+			idx++;
+			switch(_DG)
+			{
+				case '0': count=(count<<4)|0x00;break;
+				case '1': count=(count<<4)|0x01;break;
+				case '2': count=(count<<4)|0x02;break;
+				case '3': count=(count<<4)|0x03;break;
+				case '4': count=(count<<4)|0x04;break;
+				case '5': count=(count<<4)|0x05;break;
+				case '6': count=(count<<4)|0x06;break;
+				case '7': count=(count<<4)|0x07;break;
+				case '8': count=(count<<4)|0x08;break;
+				case '9': count=(count<<4)|0x09;break;
+				case 'a': count=(count<<4)|0x0A;break;
+				case 'A': count=(count<<4)|0x0A;break;
+				case 'b': count=(count<<4)|0x0B;break;
+				case 'B': count=(count<<4)|0x0B;break;
+				case 'c': count=(count<<4)|0x0C;break;
+				case 'C': count=(count<<4)|0x0C;break;
+				case 'd': count=(count<<4)|0x0D;break;
+				case 'D': count=(count<<4)|0x0D;break;
+				case 'e': count=(count<<4)|0x0E;break;
+				case 'E': count=(count<<4)|0x0E;break;
+				case 'f': count=(count<<4)|0x0F;break;
+				case 'F': count=(count<<4)|0x0F;break;
+				default: idx=0;count=0;break;
+			}
+			if(idx==2)
+			{
+				if(count>BUFFER_SIZE)
+				{
+					_DBG_("invalid! The size is bigger than ");_DBH(BUFFER_SIZE);
+					idx=0;count=0;
+				}
+				else
+					_DBH(count);
+			}
+		}
+		//Configure I2C in monitor mode
+		I2C_MonitorModeConfig(I2CDEV,(uint32_t)I2C_MONITOR_CFG_MATCHALL, ENABLE);
+		I2C_MonitorModeCmd(I2CDEV, ENABLE);
+
+		_DBG_("\n\rStart monitoring I2C bus...");
+
+		while(done==FALSE); done=FALSE;
+		_DBG_("done!");
+		for(i=0;i<count;i++)
+		{
+			if((i%16)==0) _DBG_("");
+			_DBH(buffer[i]);_DBC(0x20);
+			buffer[i]=0;
+		}
+
+	}
+	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
+
+/*
+ * @}
+ */