Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F403xx_v2/DAC/SWTRG#0x0
DAC software trigger register(DAC_SWTRIGR)
DAC1 software trigger
DAC2 software trigger
https://github.com/cmsis-svd/cmsis-svd-data