stm32f1xx-lal has no features set by default.
[dependencies] stm32f1xx-lal = { version = "0.1.7", features = ["rt", "stm32f100", "stm32f101", "stm32f103", "stm32f107"] }
Enables rt of stm32f1
Enables stm32f100 of stm32f1
Enables stm32f101 of stm32f1
Enables stm32f103 of stm32f1
Enables stm32f107 of stm32f1
stm32f1xx-lal has 5 features without comments.