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28377s SCI发送问题

tecman chen
Expert 1465 points

28377s使用SIC_ECHOBACK_CPU01例程，只是修改下端口，使用串口助手没有数据，修改的地方如下：

GPIO_SetupPinMux(9, GPIO_MUX_CPU1, 1);
GPIO_SetupPinOptions(9, GPIO_INPUT, GPIO_PUSHPULL);
GPIO_SetupPinMux(8, GPIO_MUX_CPU1, 1);
GPIO_SetupPinOptions(8, GPIO_OUTPUT, GPIO_ASYNC);

硬件方面已经排查，没有问题，但一直都没数据发出，以上配置是否正确？

  • 0
    TI__Mastermind 43911 points
    对于void GPIO_SetupPinMux(Uint16 pin, Uint16 cpu, Uint16 peripheral)函数，参数的描述如下：
    pin - This is the GPIO number
    cpu - This is the CPU number - 1 (see defines of GPIO_MUX_CPU1 and GPIO_MUX_CPU2)
    peripheral - This is the mux position on that table you referenced in the datasheet. So this will be a integer from 0-15 depending on what you are selecting.
  • 0 回复 Seven Han
    Expert 1465 points
    peripheral - This is the mux position on that table you referenced in the datasheet. So this will be a integer from 0-15 depending on what you are selecting.
    这个参数不是很理解，具体在参考手册哪一页，找过都没找到
  • 0 回复 tecman chen
    TI__Mastermind 43911 points
    在datasheet 4.2 章节Signal Descriptions 表格内mux position
    www.ti.com.cn/.../tms320f28377s.pdf