我查了一下F446的勘误手册:
《es0298-stm32f446xcxe-device-limitations-stmicroelectronics》
和F4x7的勘误手册《es0206-stm32f427437-and-stm32f429439-line-limitations-stmicroelectronics》
里面有相关描述:
“The time triggered communication mode described in the reference manual is not
supported. As a result timestamp values are not available. TTCM bit must be kept cleared in
the CAN_MCR register (time triggered communication mode disabled).”