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TMS320F280049C: CAN通信问题

DU BANGSONG
Prodigy 130 points
Part Number: TMS320F280049C
Other Parts Discussed in Thread: LAUNCHXL-F280049C

你好，我在用launchxl-F280049C调试can_ex3_external_transmit例程时，在输出引脚GPIO32测不到输出信号，ex1和ex2的loopback模式下是可以在输出脚测出波形的，请问这是什么原因？