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- /*!
- \file readme.txt
- \brief description of the CTC trim internal 48MHz RC oscillator with GPIO
- */
- /*
- Copyright (C) 2017 GigaDevice
- 2017-06-06, V1.0.0, firmware for GD32F3x0
- */
- This example is based on the GD32350R-EVAL board, it shows CTC is used to trim internal
- 48MHz RC oscillator with GPIO.
- Connect the PA8 pin with the 32kHz square wave(the amplitude is 3.3V and the offset is
- 1.65V).
- When the clock trim is OK, led1 will be on.
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