Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F437xx_v2/EDMA/SYNCEN#0x0
Sync Enable
Stream 1 sync enable
Stream 2 sync enable
Stream 3 sync enable
Stream 4 sync enable
Stream 5 sync enable
Stream 6 sync enable
Stream 7 sync enable
Stream 8 sync enable
https://github.com/cmsis-svd/cmsis-svd-data