48 lines
2.4 KiB
Plaintext
48 lines
2.4 KiB
Plaintext
/*!
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\file readme.txt
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\brief description of the WWDGT_delay_feed example
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\version 2021-10-30, V1.0.0, firmware for GD32W51x
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*/
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/*
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Copyright (c) 2021, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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This example is based on the GD32W15P-EVAL-V1.0 board, it shows the WWDGT
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with different counter value and window value make the different WWDGT timeout. As
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a result, LED1 and LED2 display a different phenomenon.
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In this demo, the WWDGT counter value is set to 127, the refresh window is set to
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80. In this case the WWDGT timeout is set to 46.6ms, the value in the delay function
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is set to 40ms, the WWDGT counter can reloaded normally,the LED1 is turn off, LED2
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is blinking fast.
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If the value in the delay function is not set properly, the WWDGT counter is not
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reloaded. As a result, the system reset and the LED1 and LED2 are remain illuminated.
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In this example the system clock is set to 90 MHz.
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