/********************************************************************** * $Id$ abstract.txt *//** * @file abstract.txt * @brief Example description file * @version 2.0 * @date * @author NXP MCU SW Application Team/Micromint USA Support * * Copyright(C) 2010, NXP Semiconductor * All rights reserved. * *********************************************************************** * 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 calibrate real-time clock Process: The calibration logic can periodically adjust the time counter either by not incrementing the ocunter, or by incrementing the counter by 2 instead 1. This allow calibrating the RTC oscillator under some typical voltage and temperature conditions without the need to externally trim the RTC oscillator In this example: - Calibration setting: + Calibration value = 5s; + Direction: Forward calibration - Real-time clock setting: + enable incrementing second counter interrupt After each 5s, real-time clock will adjust automatically by incrementing the counter by 2 instead of 1. You can observe calibration process via serial display. @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) rtc_calib.c: Main program @How to run: Hardware configuration: Serial display configuration:(e.g: TeraTerm, Hyperterminal, Flash Magic...) – 115200bps – 8 data bit – No parity – 1 stop bit – No flow control Running mode: This example can run on RAM/ROM mode. (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: Connect COM1 on the Lincoln board to COM port on your computer - Step 4: Configure hardware and serial display as above instruction - Step 5: Run example and observe on serial display (Pls see "LPC17xx Example Description" document - chapter "Examples > RTC > Calibration" for more details) @Tip: - Open \EWARM\*.eww project file to run example on IAR - Open \RVMDK\*.uvproj project file to run example on Keil