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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TIM1的单脉冲模式。配置TIM1为从模式触发模式， ，
PWM2模式， ， ， ，
延迟20ms后产生一个宽度为80ms的脉冲。
Function descriptions:
This sample demonstrates the single pulse mode of TIM1. TIM1 is configured in
slave mode trigger mode with TI2FP2 as the trigger source. Channel 1 is
configured as PWM mode 2 and mapped to pin PA8, while channel 2 is configured
as input mode and mapped to pin PA9. When an rising edge is detected on PA9,
a 20ms delay is applied, and then PA8 will output a pulse with a width of 80ms.
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测试环境：
测试用板：
MDK版本：
IAR版本：
GCC 版本：
Test environment:
Test board: PY32F403_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. 编译下载程序到MCU，
2. 使用示波器的捕获模式观察PA8，
3. 当PA9上产生一个上升沿时，
Example execution steps:
1.Compile and download the program to the MCU, and then run it.
2.Use an oscilloscope in capture mode to observe pins PA8 and PA9.
3.When a rising edge is detected on PA9, after a delay of 20ms, PA8 will
output a pulse with a width of 80ms.
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注意事项：
Notes:
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