These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
Diff: NVIC/Priority/abstract.h
- Revision:
- 0:bf7b9fba3924
diff -r 000000000000 -r bf7b9fba3924 NVIC/Priority/abstract.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/NVIC/Priority/abstract.h Sun Mar 20 05:38:56 2011 +0000 @@ -0,0 +1,98 @@ + ******************** (C) COPYRIGHT 2010 NXPSemiconductors ******************* + * @file NVIC\Priority\abstract.txt + * @author NXP MCU SW Application Team + * @version 2.0 + * @date + * @brief Description of the NVIC Priority 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 configure NVIC priority grouping for testing + tail-chaining/Late-arriving interrupt mode. + Process: + This example uses 2 external interrupt 0 and 3 as IRQ channels. + Setting "INT_MODE" macro to chose interrupt mode test. + - INT_MODE = 0: Tail-chainning interrupt testing + EXT0 is assigned group-priority = 0, sub-priority = 2 + EXT3 is assigned group-priority = 0, sub-priority = 1 + Two IRQ channels has same group.So, new ISR can not pre-empt previous interrupt + when it's executing even if new ISR has higher priority than curren ISR + - INT_MODE = 1: Late-arriving interrupt testing. + EXT0 is assigned group-priority = 0, sub-priority = 0 + EXT3 is assigned group-priority = 1, sub-priority = 0 + EXT0 has higher group-priority than EXT3, so EXT0 can pre-empt EXT3 when it's executing + + In this example, EXT0 occurs when pressing button INT0. + EXT0 interrupt will blink LED P1.29 10 times. + EXT3 occurs when turning ADC potentiometer until pull-down GPIO P0.25 pin (ADC0.2). + EXT3 interrupt will blink LED P1.28 10 times + + +@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) + nvic_priority.c: Main program + +@How to run: + Hardware configuration: + This example was tested only on: + Keil MCB1700 with LPC1768 vers.1 + These jumpers must be configured as following: + - VDDIO: ON + - VDDREGS: ON + - VBUS: ON + - INT0: ON + - Remain jumpers: OFF + + 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 hardward as above instruction + - Step 4: Run example + - Test tail-chaining interrupt mode: + + Hit INT0 button to generate EXT0. Led P1.29 will blink 10 times + When P1.29 is blinking, turn ADC potentiometer and see if EXT3 pre-empt EXT0 or not. + When EXT0 executes finised, EXT3 will bink led P1.28 10 times. + - Test late-arriving interrupt mode: + + Turn ADC potentiometer to generate EXT3, Led P1.28 will blink 10 times. + When P1.28 is blinking, press INT0 button to see EXT0 pre-empt EXT3. + Led P1.29 will blink instead led P1.28. After P1.29 blink 10 times, P1.28 continues + blink remain times. + + + (Pls see "LPC17xx Example Description" document - chapter "Examples > NVIC > Priority" + for more details) + +@Tip: + - Open \EWARM\*.eww project file to run example on IAR + - Open \RVMDK\*.uvproj project file to run example on Keil \ No newline at end of file