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Am335x 的串口cts，rts定义疑问

you zhong
Prodigy 160 points


从am335x的技术手册上，cts定义为输入，rts定义为输出；但在3.2的内核代码中，定义相反： static struct pinmux_config uart1_wl12xx_pin_mux[] = { {"uart1_ctsn.uart1_ctsn", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT}, {"uart1_rtsn.uart1_rtsn", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT}, {"uart1_rxd.uart1_rxd", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP}, {"uart1_txd.uart1_txd", OMAP_MUX_MODE0 | AM33XX_PULL_ENBL}, {NULL, 0}, }; 是代码错了吗？
  • 0
    TI__Guru**** 357097 points
    代码错了，请看下面的帖子。
    Incorrect:

    From the board-file arch/arm/mach-omap2/board-am335xevm.c:

    static struct pinmux_config uart1_wl12xx_pin_mux[] = {

    {"uart1_ctsn.uart1_ctsn", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},

    {"uart1_rtsn.uart1_rtsn", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT},

    {"uart1_rxd.uart1_rxd", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},

    {"uart1_txd.uart1_txd", OMAP_MUX_MODE0 | AM33XX_PULL_ENBL},

    {NULL, 0},



    Correct:

    static struct pinmux_config uart1_wl12xx_pin_mux[] = {

    {"uart1_ctsn.uart1_ctsn", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT},

    {"uart1_rtsn.uart1_rtsn", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},

    {"uart1_rxd.uart1_rxd", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},

    {"uart1_txd.uart1_txd", OMAP_MUX_MODE0 | AM33XX_PULL_ENBL},

    {NULL, 0},
    e2e.ti.com/.../337173