huhui/bms @ e1c24d7b349e470bc70a0f8d15e17eeae445af98

huhui b0dbe83643 set clk of apb1 to sysclk/4(21M), this can use 100K I2C clk		%!s(int64=5) %!d(string=hai) anos
..
5.7.0	d67a815cfc setup project arch && compile OK	%!s(int64=5) %!d(string=hai) anos
GD32F3x0	b0dbe83643 set clk of apb1 to sysclk/4(21M), this can use 100K I2C clk	%!s(int64=5) %!d(string=hai) anos