These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
Diff: PWM/Match_Interrupt/abstract.h
- Revision:
- 0:bf7b9fba3924
diff -r 000000000000 -r bf7b9fba3924 PWM/Match_Interrupt/abstract.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PWM/Match_Interrupt/abstract.h Sun Mar 20 05:38:56 2011 +0000 @@ -0,0 +1,104 @@ + ******************** (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