Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F415xx_v2/TMR3/CCTRL#0x0
Channel control register
Channel 1 enable
Channel 1 Polarity
Channel 2 enable
Channel 2 Polarity
Channel 3 enable
Channel 3 Polarity
Channel 4 enable
Channel 4 Polarity
https://github.com/cmsis-svd/cmsis-svd-data