wenkong_junshi/Examples/TIMER/TIMER1_exttrigger

/*!
\file readme.txt
\brief description of the TIMER1 external trigger demo for gd32f30x

\version 2017-02-10, V1.0.0, firmware for GD32F30x
\version 2018-10-10, V1.1.0, firmware for GD32F30x
\version 2018-12-25, V2.0.0, firmware for GD32F30x
\version 2020-09-30, V2.1.0, firmware for GD32F30x
*/

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This demo is based on the GD32307C-EVAL-V1.1 board, it shows how to start TIMER
peripherals with an external trigger.
TIMER1 is configured as slave timer for an external trigger connected to
TIMER1 CI0 pin :
- The TIMER1 CI0FE0 is used as trigger input
- Rising edge is used to start the TIMER1: event mode.
- TIMER1 is used PWM0 Mode
The starts of the TIMER1 counter are controlled by the external trigger.

Connect the TIMER1 CH0 pin to +3V3 on the board as a external trigger with a
rising edge.