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                                样例使用说明
                             Sample Description
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功能描述：
此样例演示了在TIM1输入捕获功能，PB12或PC13或PC5输入时钟信号，TIM1捕获成功后，
会进入捕获中断，每进一次中断，翻转一次LED

Function descriptions:
This sample demonstrates the input capture function of TIM1, input clock signal 
into PB12 or PC13 or PC5 will generate the capture interrupt after TIM1 capture 
successfully.Toggle the LED once per interruption
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测试环境：
测试用板：PY32T090_STK
MDK版本： 5.28
IAR版本： 9.20
GCC版本：GNU Arm Embedded Toolchain 10.3-2021.10

Test environment:
Test board: PY32T090_STK
MDK Version: 5.28
IAR Version: 9.20
GCC Version: GNU Arm Embedded Toolchain 10.3-2021.10
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使用步骤：
1. 下载并运行程序
2. PB12和PC5引脚不输入时钟信号的情况下，PC13引脚输入时钟信号，LED会翻转
3. PB12和PC13引脚不输入时钟信号的情况下，PC5引脚输入时钟信号，LED会翻转
4. PC13和PC5引脚不输入时钟信号的情况下，PB12引脚输入时钟信号，LED会翻转

Example execution steps:
1. compile and download the program to MCU and run it;
2. When PB12 and PC5 pins do not input the clock signal, input the clock signal 
into PC13 pins, and the LED will toggle
3. When PB12 and PC13 pins do not input the clock signal, input the clock signal 
into PC5 pins, and the LED will toggle
4. When PC13 and PC5 pins do not input clock signals, input the clock signal 
into PB12 pins, and the LED will toggle
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注意事项：
通过USB转TTL模块连接PC与STK板,STK板与USB转TTL模块的连线方式如下；
@PrintfConfigStart
STK板        USB转TTL模块
PB9(TX)   -->  RX
PB8(RX)   -->  TX
GND       -->  GND
UART配置为波特率115200，数据位8，停止位1，校验位None
@PrintfConfigEnd

Notes:
Connect the PC to the STK board through the USB to TTL module, and the connection
method between the STK board and the USB to TTL module is as follows:
@PrintfConfigStart
STK board USB to TTL module
PB9(TX)   -->  RX
PB8(RX)   -->  TX
GND       -->  GND
UART is configured as BaudRate 115200, data bit 8, stop bit 1, and parity None.
@PrintfConfigEnd
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