MPC8541的GPIO访问-MPC8541 visit the GPIO # define GPIO_REG (type, port) (M8260_IOP_P port # # # # type (GPIO_IMMR_ BASE)) # define gpioRegGet (type, port, reg) do (if (port == PORT_A) reg = (NW_VUINT32 *) GPIO_REG (type, A) else if (port == PORT_B) reg = (NW_VUINT32 *) G PIO_REG (type, B) else if (port == PORT_C) reg = (NW_VUINT32 *) G PIO_REG (type, C) else if (port == PORT_D) reg = (NW_VUINT32 *) G PIO_REG (type D) else reg = NULL;) while (0)