/*!
\file readme.txt
\brief description of the tamper with timestamp example
\version 2018-06-19, V1.0.0, firmware for GD32E230
*/
/*
Copyright (c) 2018, GigaDevice Semiconductor Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
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this list of conditions and the following disclaimer in the documentation
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3. Neither the name of the copyright holder nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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*/
This example is based on the GD32E230C-EVAL-V1.0 board, it explains how
to configure the RTC module. In this demo, RTC peripheral is configured to keep
time and generate the tamper interrupt.
The RTC clock source can be chose to LXTAL or IRC40K by uncomment the corresponding
define in main file. And the HyperTerminal should be connected to the evaluation
board via USART0/USART1. The vbat bin on the board should connect to the CR1220 battery.
The tamper key is the tamper0 pin. The tamper0 is configured to used for timestamp function.
After start-up, the program check if the BKP data register is written to a key
value. If the value is not correct, the program will ask to set the time value on the
HyperTerminal. If the key value is correct, the current time and subsecond will be
displayed on the HyperTerminal.
The RTC module is in the Backup Domain, and is not reset by the system reset or
power reset.
When press the tamper key, a tamper0 interrupt will be generated, and the tamper0 event
will reset the BKP0 register, thus if you press the reset key, on the HyperTerminal it asks
you to set the time again. LED1, LED2 toggles. If LED2 always turn on, there may be other write
operations to BKP0 register has occured. In this example it's configured to enable timestamp
function when the tamper0 event occurs, thus the timestamp value is then be print on the
HyperTerminal to tell the time that tamper0 event occured.
GD32E231.zip_GD-Link Programmer_GD32E231_GD32E231相关软件资料_cent4lb_ （497个子文件） 
Project.uvguix.Administrator 89KB Project.axf 75KB Project_sct.Bak 494B download(-i).bat 136B download.bat 120B upload.bat 102B gd32e230_timer.c 87KB gd32e230_usart.c 43KB gd32e230_rcu.c 36KB gd32e230_rtc.c 36KB gd32e230_spi.c 34KB gd32e230_adc.c 29KB gd32e230_i2c.c 28KB gd32e230_fmc.c 25KB gd32e230_dma.c 21KB gd32e230_gpio.c 14KB rc5_decode.c 12KB system_gd32e230.c 12KB rc5_encode.c 11KB main.c 10KB main.c 10KB main.c 10KB gd32e230_it.c 10KB main.c 9KB main.c 9KB gd32e230_pmu.c 9KB main.c 9KB main.c 9KB main.c 9KB gd32e230c_eval.c 9KB main.c 9KB main.c 8KB gd32e230_fwdgt.c 8KB gd32e230_exti.c 8KB main.c 8KB main.c 8KB main.c 8KB gd32e230_syscfg.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 7KB main.c 6KB main.c 6KB main.c 6KB main.c 6KB main.c 6KB main.c 6KB gd32e230_crc.c 6KB main.c 6KB gd32e230_it.c 6KB main.c 6KB gd32e230_dbg.c 6KB main.c 6KB main.c 6KB main.c 6KB main.c 5KB main.c 5KB gd32e230_cmp.c 5KB main.c 5KB main.c 5KB main.c 5KB main.c 5KB gd32e230_misc.c 5KB I2C0_IE.c 5KB main.c 5KB main.c 5KB gd32e230_it.c 5KB gd32e230_wwdgt.c 5KB main.c 5KB gd32e230_it.c 5KB main.c 5KB gd32e230_it.c 5KB main.c 5KB main.c 5KB main.c 5KB main.c 5KB main.c 5KB main.c 5KB main.c 5KB gd32e230_it.c 5KB main.c 5KB main.c 5KB gd32e230_it.c 4KB main.c 4KB main.c 4KB gd32e230_it.c 4KB I2C0_IE.c 4KB gd32e230_it.c 4KB gd32e230_it.c 4KB gd32e230_it.c 4KB共 497 条
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