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28377S里面的cla要怎么配置才能操作GPIO口



在C28X的代码中按常规配置了一个gpio4,可以拉高拉低。然后在cla文件中添加了F2837xS_gpio.h,在任务中写上GpioDataRegs.GPACLEAR.bit.GPIO4 = 1,用示波器观察IO口信号,没发现拉低

  • 要在初始化的时候配置GPACSEL1寄存器,将GPIO4的主权给CLA。

    ERIC

  • GPACSEL1 is shown in Figure 7-15 and described in Table 7-25.
    Return to Summary Table.
    GPIO A Core Select Register (GPIO0 to 7)
    Selects which master's GPIODAT/SET/CLEAR/TOGGLE registers control this GPIO pin
    xx00: CPU1 selected
    xx01: CPU1.CLA1 selected
    xx10: CPU2 selected
    xx11: CPU2.CLA1 selected

    15-12 GPIO3 R/W 0h Selects which master's GPIODAT/SET/CLEAR/TOGGLE registers
    control this GPIO pin

    Eric