/**
  ******************************************************************************
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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Version history:
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2019-07-22  V1.0.0  Eastsoft AE TEAM

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Demo introduction:
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@how to use
LED1 flickers with 1 Hz.
This example shows how to configure the GPIO using the MD library GPIO
modulel. We Config PLL1 48MHz as the system clock by calling 
md_cmu_system_clock_config() function. Then we Initialize the SysTic timer
to generate 1ms interrupt by calling md_init_1ms_tick() function.
The md_inc_tick() function should be called in SysTick_Handler() function
if we use the md_delay_1ms() function.

We select which module to use by defining MD_XXXX. For examples, If you need
to use the CMU module, you can define MD_CMU in md_conf.h.

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The main document introduction:
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system:
startup_es32w3120.s ------- Startup file

user:
irq.c -------------------- Interrupt handlers file
main.c ------------------- Main source file
main.h ------------------- Main header file

md lib:
md_conf.h ------------ --- MD library configuration file
