Frank 26080115
These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
PWM/Single_Edge/abstract.h@0:bf7b9fba3924, 2011-03-20 (annotated)
- Committer:
- frank26080115
- Date:
- Sun Mar 20 05:38:56 2011 +0000
- Revision:
- 0:bf7b9fba3924
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| frank26080115 | 0:bf7b9fba3924 | 1 | ******************** (C) COPYRIGHT 2010 NXPSemiconductors ******************* |
| frank26080115 | 0:bf7b9fba3924 | 2 | * @file PWM\Single_Edge\abstract.txt |
| frank26080115 | 0:bf7b9fba3924 | 3 | * @author NXP MCU SW Application Team |
| frank26080115 | 0:bf7b9fba3924 | 4 | * @version 2.0 |
| frank26080115 | 0:bf7b9fba3924 | 5 | * @date |
| frank26080115 | 0:bf7b9fba3924 | 6 | * @brief Description of the MCPWM Single Edge example. |
| frank26080115 | 0:bf7b9fba3924 | 7 | ****************************************************************************** |
| frank26080115 | 0:bf7b9fba3924 | 8 | * Software that is described herein is for illustrative purposes only |
| frank26080115 | 0:bf7b9fba3924 | 9 | * which provides customers with programming information regarding the |
| frank26080115 | 0:bf7b9fba3924 | 10 | * products. This software is supplied "AS IS" without any warranties. |
| frank26080115 | 0:bf7b9fba3924 | 11 | * NXP Semiconductors assumes no responsibility or liability for the |
| frank26080115 | 0:bf7b9fba3924 | 12 | * use of the software, conveys no license or title under any patent, |
| frank26080115 | 0:bf7b9fba3924 | 13 | * copyright, or mask work right to the product. NXP Semiconductors |
| frank26080115 | 0:bf7b9fba3924 | 14 | * reserves the right to make changes in the software without |
| frank26080115 | 0:bf7b9fba3924 | 15 | * notification. NXP Semiconductors also make no representation or |
| frank26080115 | 0:bf7b9fba3924 | 16 | * warranty that such application will be suitable for the specified |
| frank26080115 | 0:bf7b9fba3924 | 17 | * use without further testing or modification. |
| frank26080115 | 0:bf7b9fba3924 | 18 | ****************************************************************************** |
| frank26080115 | 0:bf7b9fba3924 | 19 | |
| frank26080115 | 0:bf7b9fba3924 | 20 | @Example description: |
| frank26080115 | 0:bf7b9fba3924 | 21 | Purpose: |
| frank26080115 | 0:bf7b9fba3924 | 22 | This example describes how to use PWM signal on 6 Channels in single edge mode |
| frank26080115 | 0:bf7b9fba3924 | 23 | Process: |
| frank26080115 | 0:bf7b9fba3924 | 24 | This program illustrates the PWM signal on 6 Channels in single edge mode |
| frank26080115 | 0:bf7b9fba3924 | 25 | Peripheral clock for PWM: PWM_PCLK = CCLK / 4 = 72MHz/4 = 18MHz and there is no |
| frank26080115 | 0:bf7b9fba3924 | 26 | prescale for PWM. The PWM timer/counter clock is at 18MHz. The base rate is set to 256 |
| frank26080115 | 0:bf7b9fba3924 | 27 | The base PWM frequency is at 18MHz/256 = 70.312 KHz (Period = ~14.22 microsecond) |
| frank26080115 | 0:bf7b9fba3924 | 28 | Each PWM channel (1 to 6) will be configured as following: |
| frank26080115 | 0:bf7b9fba3924 | 29 | + PWM1.1 = (10/256) (period = 0.56 microsecond)(P2.0) |
| frank26080115 | 0:bf7b9fba3924 | 30 | + PWM1.2 = (20/256) (period = 1.11 microsecond)(P2.1) |
| frank26080115 | 0:bf7b9fba3924 | 31 | + PWM1.3 = (30/256) (period = 1.67 microsecond)(P2.2) |
| frank26080115 | 0:bf7b9fba3924 | 32 | + PWM1.4 = (40/256) (period = 2.22 microsecond)(P2.3) |
| frank26080115 | 0:bf7b9fba3924 | 33 | + PWM1.5 = (50/256) (period = 2.78 microsecond)(P2.4) |
| frank26080115 | 0:bf7b9fba3924 | 34 | + PWM1.6 = (60/256) (period = 3.33 microsecond)(P2.5) |
| frank26080115 | 0:bf7b9fba3924 | 35 | Using Oscilloscope to observe the PWM signals |
| frank26080115 | 0:bf7b9fba3924 | 36 | |
| frank26080115 | 0:bf7b9fba3924 | 37 | @Directory contents: |
| frank26080115 | 0:bf7b9fba3924 | 38 | \EWARM: includes EWARM (IAR) project and configuration files |
| frank26080115 | 0:bf7b9fba3924 | 39 | \Keil: includes RVMDK (Keil)project and configuration files |
| frank26080115 | 0:bf7b9fba3924 | 40 | |
| frank26080115 | 0:bf7b9fba3924 | 41 | lpc17xx_libcfg.h: Library configuration file - include needed driver library for this example |
| frank26080115 | 0:bf7b9fba3924 | 42 | makefile: Example's makefile (to build with GNU toolchain) |
| frank26080115 | 0:bf7b9fba3924 | 43 | pwm_single_edge.c: Main program |
| frank26080115 | 0:bf7b9fba3924 | 44 | |
| frank26080115 | 0:bf7b9fba3924 | 45 | @How to run: |
| frank26080115 | 0:bf7b9fba3924 | 46 | Hardware configuration: |
| frank26080115 | 0:bf7b9fba3924 | 47 | This example was tested on: |
| frank26080115 | 0:bf7b9fba3924 | 48 | Keil MCB1700 with LPC1768 vers.1 |
| frank26080115 | 0:bf7b9fba3924 | 49 | These jumpers must be configured as following: |
| frank26080115 | 0:bf7b9fba3924 | 50 | - VDDIO: ON |
| frank26080115 | 0:bf7b9fba3924 | 51 | - VDDREGS: ON |
| frank26080115 | 0:bf7b9fba3924 | 52 | - VBUS: ON |
| frank26080115 | 0:bf7b9fba3924 | 53 | - Remain jumpers: OFF |
| frank26080115 | 0:bf7b9fba3924 | 54 | - The output signal can be observed by oscilloscope on these pins below: |
| frank26080115 | 0:bf7b9fba3924 | 55 | IAR LPC1768 KickStart vers.A |
| frank26080115 | 0:bf7b9fba3924 | 56 | These jumpers must be configured as following: |
| frank26080115 | 0:bf7b9fba3924 | 57 | - PWR_SEL: depend on power source |
| frank26080115 | 0:bf7b9fba3924 | 58 | - DBG_EN : ON |
| frank26080115 | 0:bf7b9fba3924 | 59 | - Remain jumpers: OFF |
| frank26080115 | 0:bf7b9fba3924 | 60 | |
| frank26080115 | 0:bf7b9fba3924 | 61 | PWM pin selected: |
| frank26080115 | 0:bf7b9fba3924 | 62 | Observe PWM wave signal on these pin |
| frank26080115 | 0:bf7b9fba3924 | 63 | - PWM1.1 (channel 1): P2.0 |
| frank26080115 | 0:bf7b9fba3924 | 64 | - PWM1.2 (channel 2): P2.1 |
| frank26080115 | 0:bf7b9fba3924 | 65 | - PWM1.3 (channel 3): P2.2 |
| frank26080115 | 0:bf7b9fba3924 | 66 | - PWM1.4 (channel 4): P2.3 |
| frank26080115 | 0:bf7b9fba3924 | 67 | - PWM1.5 (channel 5): P2.4 |
| frank26080115 | 0:bf7b9fba3924 | 68 | - PWM1.6 (channel 6): P2.5 |
| frank26080115 | 0:bf7b9fba3924 | 69 | |
| frank26080115 | 0:bf7b9fba3924 | 70 | |
| frank26080115 | 0:bf7b9fba3924 | 71 | Running mode: |
| frank26080115 | 0:bf7b9fba3924 | 72 | This example can run on RAM/ROM mode. |
| frank26080115 | 0:bf7b9fba3924 | 73 | |
| frank26080115 | 0:bf7b9fba3924 | 74 | Note: If want to burn hex file to board by using Flash Magic, these jumpers need |
| frank26080115 | 0:bf7b9fba3924 | 75 | to be connected: |
| frank26080115 | 0:bf7b9fba3924 | 76 | - MCB1700 with LPC1768 ver.1: |
| frank26080115 | 0:bf7b9fba3924 | 77 | + RST: ON |
| frank26080115 | 0:bf7b9fba3924 | 78 | + ISP: ON |
| frank26080115 | 0:bf7b9fba3924 | 79 | - IAR LPC1768 KickStart vers.A: |
| frank26080115 | 0:bf7b9fba3924 | 80 | + RST_E: ON |
| frank26080115 | 0:bf7b9fba3924 | 81 | + ISP_E: ON |
| frank26080115 | 0:bf7b9fba3924 | 82 | |
| frank26080115 | 0:bf7b9fba3924 | 83 | (Please reference "LPC1000 Software Development Toolchain" - chapter 4 "Creating and working with |
| frank26080115 | 0:bf7b9fba3924 | 84 | LPC1000CMSIS project" for more information) |
| frank26080115 | 0:bf7b9fba3924 | 85 | |
| frank26080115 | 0:bf7b9fba3924 | 86 | Step to run: |
| frank26080115 | 0:bf7b9fba3924 | 87 | - Step 1: Build example. |
| frank26080115 | 0:bf7b9fba3924 | 88 | - Step 2: Burn hex file into board (if run on ROM mode) |
| frank26080115 | 0:bf7b9fba3924 | 89 | - Step 3: Configure hardware as above instruction |
| frank26080115 | 0:bf7b9fba3924 | 90 | - Step 4: Run example |
| frank26080115 | 0:bf7b9fba3924 | 91 | Use oscilloscope to monitor the wave form on pin P2.0, P2.1, P2.2, P2.3, P2.4, P2.5 |
| frank26080115 | 0:bf7b9fba3924 | 92 | |
| frank26080115 | 0:bf7b9fba3924 | 93 | (Pls see "LPC17xx Example Description" document - chapter "Examples > PWM > Single_Edge" |
| frank26080115 | 0:bf7b9fba3924 | 94 | for more details) |
| frank26080115 | 0:bf7b9fba3924 | 95 | |
| frank26080115 | 0:bf7b9fba3924 | 96 | @Tip: |
| frank26080115 | 0:bf7b9fba3924 | 97 | - Open \EWARM\*.eww project file to run example on IAR |
| frank26080115 | 0:bf7b9fba3924 | 98 | - Open \RVMDK\*.uvproj project file to run example on Keil |