Diff: PWM/Match_Interrupt/abstract.h

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+ ******************** (C) COPYRIGHT 2010 NXPSemiconductors *******************
+ * @file    PWM\Match_Interrupt\abstract.txt 
+ * @author  NXP MCU SW Application Team
+ * @version 2.0
+ * @date    
+ * @brief   Description of the MCPWM Match Interrupt example.
+ ******************************************************************************
+ * 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.
+ ******************************************************************************
+  
+@Example description:
+	Purpose:
+		This example describes how to use PWM Match function in interrupt mode.
+	Process:
+		This program illustrates the PWM signal on 6 Channels in single edge mode
+	 	Peripheral clock for PWM: PWM_PCLK = CCLK / 4 = 72MHz/4 = 18MHz and there is no
+	 	prescale for PWM. The PWM timer/counter clock is at 18MHz. The base rate is set to 256
+	 	The base PWM frequency is at 18MHz/256 = 70.312 KHz (Period = ~14.22 microsecond)
+	 	Each PWM channel (1 to 6) will be configured as following:
+			 + PWM1.1 = (10/256) (period = 0.56 microsecond) (P2.0)
+			 + PWM1.2 = (20/256) (period = 1.11 microsecond) (P2.1)
+			 + PWM1.3 = (30/256) (period = 1.67 microsecond) (P2.2)
+			 + PWM1.4 = (40/256) (period = 2.22 microsecond) (P2.3)
+			 + PWM1.5 = (50/256) (period = 2.78 microsecond) (P2.4)
+			 + PWM1.6 = (60/256) (period = 3.33 microsecond) (P2.5)
+		 Using Oscilloscope to observe the PWM signals
+		 Here, PWM1.1 value keeps changing, it will increase by the time from 0 to 256 period
+		 and restart. Match interrupt for channel 0 is set, when timer of PWM reach to 256
+		 (value of channel 0 match), an interrupt for matching will generate and update the
+		 value of PWM1.1, this value will be updated every 4096 match interrupts or:
+		 Period * 4096 = 14.22 * 4096 = 58,245 (microsecond)
+		 And this value will be reset to 0 after:
+		 Period * 4096 * 256 = 14,910,750.72 (microsecond) = ~15 (second)
+
+@Directory contents:
+	\EWARM: includes EWARM (IAR) project and configuration files
+	\Keil:	includes RVMDK (Keil)project and configuration files 
+	 
+	lpc17xx_libcfg.h: Library configuration file - include needed driver library for this example 
+	makefile: Example's makefile (to build with GNU toolchain)
+	pwm_match_int.c: Main program
+
+@How to run:
+	Hardware configuration:		
+		This example was tested on:
+			Keil MCB1700 with LPC1768 vers.1
+				These jumpers must be configured as following:
+				- VDDIO: ON
+				- VDDREGS: ON 
+				- VBUS: ON
+				- Remain jumpers: OFF
+				- The output signal can be observed by oscilloscope on these pins below:
+			IAR LPC1768 KickStart vers.A
+				These jumpers must be configured as following:
+				- PWR_SEL: depend on power source
+				- DBG_EN : ON
+				- Remain jumpers: OFF
+				
+			PWM pin selected:
+				Observe PWM wave signal on these pin
+				- PWM1.1 (channel 1): P2.0
+				- PWM1.2 (channel 2): P2.1
+				- PWM1.3 (channel 3): P2.2
+				- PWM1.4 (channel 4): P2.3
+				- PWM1.5 (channel 5): P2.4
+				- PWM1.6 (channel 6): P2.5
+		
+	
+	Running mode:
+		This example can run on RAM/ROM mode.
+					
+		Note: If want to burn hex file to board by using Flash Magic, these jumpers need
+		to be connected:
+			- MCB1700 with LPC1768 ver.1:
+				+ RST: ON
+				+ ISP: ON
+			- IAR LPC1768 KickStart vers.A:
+				+ RST_E: ON
+				+ ISP_E: ON
+		
+		(Please reference "LPC1000 Software Development Toolchain" - chapter 4 "Creating and working with
+		LPC1000CMSIS project" for more information)
+	
+	Step to run:
+		- Step 1: Build example.
+		- Step 2: Burn hex file into board (if run on ROM mode)
+		- Step 3: Configure hardware as above instruction 
+		- Step 4: Run example, Use oscilloscope to monitor the wave form 
+		
+		(Pls see "LPC17xx Example Description" document - chapter "Examples > PWM > Match_Interrupt"
+		for more details)
+		
+@Tip:
+	- Open \EWARM\*.eww project file to run example on IAR
+	- Open \RVMDK\*.uvproj project file to run example on Keil