开始是正常的，打开了定时器中断，可以正常运行；之后再下载就提示这个错误
------------ Begin flash process of "obj\CH32V103C8T6.hex" ------------
16:16:31:527 >> Current project vendor is WCH, debugger is WCH-Link
16:16:31:528 >> Starting to Open Link in RISC-V APP mode...
16:16:31:528 >> Open Link in RISC-V APP mode Success
16:16:31:528 >> Starting to get link mode...
16:16:31:530 >> Link is under APP mode
16:16:31:530 >> Starting to compare firmware version...
16:16:31:530 >> No need to update. Already the latest version. Version is v2.3.
16:16:31:530 >> Starting to Send Chip Type...
16:16:31:570 >> Board chip status error
Board chip status error
16:16:31:570 >> Starting to Close Link...
16:16:31:570 >> Close Link Success
---------------------------------End ----------------------------------
