Frank 26080115
These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
NVIC/Priority/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 NVIC\Priority\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 NVIC Priority 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 configure NVIC priority grouping for testing |
| frank26080115 | 0:bf7b9fba3924 | 23 | tail-chaining/Late-arriving interrupt mode. |
| frank26080115 | 0:bf7b9fba3924 | 24 | Process: |
| frank26080115 | 0:bf7b9fba3924 | 25 | This example uses 2 external interrupt 0 and 3 as IRQ channels. |
| frank26080115 | 0:bf7b9fba3924 | 26 | Setting "INT_MODE" macro to chose interrupt mode test. |
| frank26080115 | 0:bf7b9fba3924 | 27 | - INT_MODE = 0: Tail-chainning interrupt testing |
| frank26080115 | 0:bf7b9fba3924 | 28 | EXT0 is assigned group-priority = 0, sub-priority = 2 |
| frank26080115 | 0:bf7b9fba3924 | 29 | EXT3 is assigned group-priority = 0, sub-priority = 1 |
| frank26080115 | 0:bf7b9fba3924 | 30 | Two IRQ channels has same group.So, new ISR can not pre-empt previous interrupt |
| frank26080115 | 0:bf7b9fba3924 | 31 | when it's executing even if new ISR has higher priority than curren ISR |
| frank26080115 | 0:bf7b9fba3924 | 32 | - INT_MODE = 1: Late-arriving interrupt testing. |
| frank26080115 | 0:bf7b9fba3924 | 33 | EXT0 is assigned group-priority = 0, sub-priority = 0 |
| frank26080115 | 0:bf7b9fba3924 | 34 | EXT3 is assigned group-priority = 1, sub-priority = 0 |
| frank26080115 | 0:bf7b9fba3924 | 35 | EXT0 has higher group-priority than EXT3, so EXT0 can pre-empt EXT3 when it's executing |
| frank26080115 | 0:bf7b9fba3924 | 36 | |
| frank26080115 | 0:bf7b9fba3924 | 37 | In this example, EXT0 occurs when pressing button INT0. |
| frank26080115 | 0:bf7b9fba3924 | 38 | EXT0 interrupt will blink LED P1.29 10 times. |
| frank26080115 | 0:bf7b9fba3924 | 39 | EXT3 occurs when turning ADC potentiometer until pull-down GPIO P0.25 pin (ADC0.2). |
| frank26080115 | 0:bf7b9fba3924 | 40 | EXT3 interrupt will blink LED P1.28 10 times |
| frank26080115 | 0:bf7b9fba3924 | 41 | |
| frank26080115 | 0:bf7b9fba3924 | 42 | |
| frank26080115 | 0:bf7b9fba3924 | 43 | @Directory contents: |
| frank26080115 | 0:bf7b9fba3924 | 44 | \EWARM: includes EWARM (IAR) project and configuration files |
| frank26080115 | 0:bf7b9fba3924 | 45 | \Keil: includes RVMDK (Keil)project and configuration files |
| frank26080115 | 0:bf7b9fba3924 | 46 | |
| frank26080115 | 0:bf7b9fba3924 | 47 | lpc17xx_libcfg.h: Library configuration file - include needed driver library for this example |
| frank26080115 | 0:bf7b9fba3924 | 48 | makefile: Example's makefile (to build with GNU toolchain) |
| frank26080115 | 0:bf7b9fba3924 | 49 | nvic_priority.c: Main program |
| frank26080115 | 0:bf7b9fba3924 | 50 | |
| frank26080115 | 0:bf7b9fba3924 | 51 | @How to run: |
| frank26080115 | 0:bf7b9fba3924 | 52 | Hardware configuration: |
| frank26080115 | 0:bf7b9fba3924 | 53 | This example was tested only on: |
| frank26080115 | 0:bf7b9fba3924 | 54 | Keil MCB1700 with LPC1768 vers.1 |
| frank26080115 | 0:bf7b9fba3924 | 55 | These jumpers must be configured as following: |
| frank26080115 | 0:bf7b9fba3924 | 56 | - VDDIO: ON |
| frank26080115 | 0:bf7b9fba3924 | 57 | - VDDREGS: ON |
| frank26080115 | 0:bf7b9fba3924 | 58 | - VBUS: ON |
| frank26080115 | 0:bf7b9fba3924 | 59 | - INT0: ON |
| frank26080115 | 0:bf7b9fba3924 | 60 | - Remain jumpers: OFF |
| frank26080115 | 0:bf7b9fba3924 | 61 | |
| frank26080115 | 0:bf7b9fba3924 | 62 | Running mode: |
| frank26080115 | 0:bf7b9fba3924 | 63 | This example can run on RAM/ROM mode. |
| frank26080115 | 0:bf7b9fba3924 | 64 | |
| frank26080115 | 0:bf7b9fba3924 | 65 | Note: If want to burn hex file to board by using Flash Magic, these jumpers need |
| frank26080115 | 0:bf7b9fba3924 | 66 | to be connected: |
| frank26080115 | 0:bf7b9fba3924 | 67 | - MCB1700 with LPC1768 ver.1: |
| frank26080115 | 0:bf7b9fba3924 | 68 | + RST: ON |
| frank26080115 | 0:bf7b9fba3924 | 69 | + ISP: ON |
| frank26080115 | 0:bf7b9fba3924 | 70 | - IAR LPC1768 KickStart vers.A: |
| frank26080115 | 0:bf7b9fba3924 | 71 | + RST_E: ON |
| frank26080115 | 0:bf7b9fba3924 | 72 | + ISP_E: ON |
| frank26080115 | 0:bf7b9fba3924 | 73 | |
| frank26080115 | 0:bf7b9fba3924 | 74 | (Please reference "LPC1000 Software Development Toolchain" - chapter 4 "Creating and working with |
| frank26080115 | 0:bf7b9fba3924 | 75 | LPC1000CMSIS project" for more information) |
| frank26080115 | 0:bf7b9fba3924 | 76 | |
| frank26080115 | 0:bf7b9fba3924 | 77 | Step to run: |
| frank26080115 | 0:bf7b9fba3924 | 78 | - Step 1: Build example. |
| frank26080115 | 0:bf7b9fba3924 | 79 | - Step 2: Burn hex file into board (if run on ROM mode) |
| frank26080115 | 0:bf7b9fba3924 | 80 | - Step 3: Configure hardward as above instruction |
| frank26080115 | 0:bf7b9fba3924 | 81 | - Step 4: Run example |
| frank26080115 | 0:bf7b9fba3924 | 82 | - Test tail-chaining interrupt mode: |
| frank26080115 | 0:bf7b9fba3924 | 83 | + Hit INT0 button to generate EXT0. Led P1.29 will blink 10 times |
| frank26080115 | 0:bf7b9fba3924 | 84 | When P1.29 is blinking, turn ADC potentiometer and see if EXT3 pre-empt EXT0 or not. |
| frank26080115 | 0:bf7b9fba3924 | 85 | When EXT0 executes finised, EXT3 will bink led P1.28 10 times. |
| frank26080115 | 0:bf7b9fba3924 | 86 | - Test late-arriving interrupt mode: |
| frank26080115 | 0:bf7b9fba3924 | 87 | + Turn ADC potentiometer to generate EXT3, Led P1.28 will blink 10 times. |
| frank26080115 | 0:bf7b9fba3924 | 88 | When P1.28 is blinking, press INT0 button to see EXT0 pre-empt EXT3. |
| frank26080115 | 0:bf7b9fba3924 | 89 | Led P1.29 will blink instead led P1.28. After P1.29 blink 10 times, P1.28 continues |
| frank26080115 | 0:bf7b9fba3924 | 90 | blink remain times. |
| frank26080115 | 0:bf7b9fba3924 | 91 | |
| frank26080115 | 0:bf7b9fba3924 | 92 | |
| frank26080115 | 0:bf7b9fba3924 | 93 | (Pls see "LPC17xx Example Description" document - chapter "Examples > NVIC > Priority" |
| 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 |