gpio.c

从Luminary官方网站下载的LM3S6000系列的UCos+Tcp/IP的源码, 经本人稍微修改后可直接在IAR6.2下编译通过,里面包括了LM3S6000系列的所有外设UART, PWn....

//
//*****************************************************************************
long
GPIOPinRead(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Return the pin value(s).
    //
    return(HWREG(ulPort + (GPIO_O_DATA + (ucPins << 2))));
}

//*****************************************************************************
//
//! Writes a value at the specified pins of the selected GPIO port.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//! \param ucVal value to write to the specified pins
//!
//! Writes the corresponding bit values to the output pins specified
//! by \e ucPins. Writing to a pin configured as an input pin has no
//! effect.
//!
//! The pins are specified using a bit-packed byte, where each bit that is
//! set identifies the pin to be accessed, and where bit 0 of the byte
//! represents GPIO port pin 0, bit 1 represents GPIO port pin 1, etc.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinWrite(unsigned long ulPort, unsigned char ucPins, unsigned char ucVal)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Write the pins.
    //
    HWREG(ulPort + (GPIO_O_DATA + (ucPins << 2))) = ucVal;
}

//*****************************************************************************
//
//! Configures pin(s) for use as an analog comparator input.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//!
//! The analog comparator input pins must be properly configured for the analog
//! comparator to function correctly.  This function provides the proper
//! configuration for those pins.
//!
//! \note This cannot be used to turn any pin into an analog comparator input;
//! it only configures an analog comparator pin for proper operation.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinTypeComparator(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Make the pin(s) be inputs.
    //
    GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_IN);

    //
    // Set the pad(s) for analog operation.
    //
    GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_ANALOG);
}

//*****************************************************************************
//
//! Configures pin(s) for use by the I2C peripheral.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//!
//! The I2C pins must be properly configured for the I2C peripheral to function
//! correctly.  This function provides the proper configuration for those pins.
//!
//! \note This cannot be used to turn any pin into an I2C pin; it only
//! configures an I2C pin for proper operation.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinTypeI2C(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Make the pin(s) be peripheral controlled.
    //
    GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);

    //
    // Set the pad(s) for open-drain operation with a weak pull-up.
    //
    GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_OD_WPU);
}

//*****************************************************************************
//
//! Configures pin(s) for use by the PWM peripheral.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//!
//! The PWM pins must be properly configured for the PWM peripheral to function
//! correctly.  This function provides a typical configuration for those pins;
//! other configurations may work as well depending upon the board setup (for
//! example, using the on-chip pull-ups).
//!
//! \note This cannot be used to turn any pin into a PWM pin; it only
//! configures a PWM pin for proper operation.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinTypePWM(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Make the pin(s) be peripheral controlled.
    //
    GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);

    //
    // Set the pad(s) for standard push-pull operation.
    //
    GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
}

//*****************************************************************************
//
//! Configures pin(s) for use by the QEI peripheral.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//!
//! The QEI pins must be properly configured for the QEI peripheral to function
//! correctly.  This function provides a typical configuration for those pins;
//! other configurations may work as well depending upon the board setup (for
//! example, not using the on-chip pull-ups).
//!
//! \note This cannot be used to turn any pin into a QEI pin; it only
//! configures a QEI pin for proper operation.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinTypeQEI(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Make the pin(s) be peripheral controlled.
    //
    GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);

    //
    // Set the pad(s) for standard push-pull operation with a weak pull-up.
    //
    GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);
}

//*****************************************************************************
//
//! Configures pin(s) for use by the SSI peripheral.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//!
//! The SSI pins must be properly configured for the SSI peripheral to function
//! correctly.  This function provides a typical configuration for those pins;
//! other configurations may work as well depending upon the board setup (for
//! example, using the on-chip pull-ups).
//!
//! \note This cannot be used to turn any pin into a SSI pin; it only
//! configures a SSI pin for proper operation.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinTypeSSI(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Make the pin(s) be peripheral controlled.
    //
    GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);

    //
    // Set the pad(s) for standard push-pull operation.
    //
    GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
}

//*****************************************************************************
//
//! Configures pin(s) for use by the Timer peripheral.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//!
//! The CCP pins must be properly configured for the timer peripheral to
//! function correctly.  This function provides a typical configuration for
//! those pins; other configurations may work as well depending upon the board
//! setup (for example, using the on-chip pull-ups).
//!
//! \note This cannot be used to turn any pin into a timer pin; it only
//! configures a timer pin for proper operation.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinTypeTimer(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Make the pin(s) be peripheral controlled.
    //
    GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);

    //
    // Set the pad(s) for standard push-pull operation.
    //
    GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
}

//*****************************************************************************
//
//! Configures pin(s) for use by the UART peripheral.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//!
//! The UART pins must be properly configured for the UART peripheral to
//! function correctly.  This function provides a typical configuration for
//! those pins; other configurations may work as well depending upon the board
//! setup (for example, using the on-chip pull-ups).
//!
//! \note This cannot be used to turn any pin into a UART pin; it only
//! configures a UART pin for proper operation.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinTypeUART(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Make the pin(s) be peripheral controlled.
    //
    GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);

    //
    // Set the pad(s) for standard push-pull operation.
    //
    GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
}

//*****************************************************************************
//
//! Configures pin(s) for use as a CAN device.
//!
//! \param ulPort base address of the selected GPIO port
//! \param ucPins bit-packed representation of the specified pins
//!
//! The CAN pins must be properly configured for the CAN peripherals to
//! function correctly.  This function provides a typical configuration for
//! those pins; other configurations may work as well depending upon the board
//! setup (for example, using the on-chip pull-ups).
//!
//! \note This cannot be used to turn any pin into a CAN pin(s); it only
//! configures a CAN pin(s) for proper operation.
//!
//! \return None.
//
//*****************************************************************************
void
GPIOPinTypeCAN(unsigned long ulPort, unsigned char ucPins)
{
    //
    // Check the arguments.
    //
    ASSERT((ulPort == GPIO_PORTA_BASE) || (ulPort == GPIO_PORTB_BASE) ||
           (ulPort == GPIO_PORTC_BASE) || (ulPort == GPIO_PORTD_BASE) ||
           (ulPort == GPIO_PORTE_BASE) || (ulPort == GPIO_PORTF_BASE) ||
           (ulPort == GPIO_PORTG_BASE) || (ulPort == GPIO_PORTH_BASE));

    //
    // Make the pin(s) be inputs.
    //
    GPIODirModeSet(ulPort, ucPins, GPIO_DIR_MODE_HW);

    //
    // Set the pad(s) for analog operation.
    //
    GPIOPadConfigSet(ulPort, ucPins, GPIO_STRENGTH_8MA, GPIO_PIN_TYPE_STD);
}

//*****************************************************************************
//
// Close the Doxygen group.
//! @}
//
//*****************************************************************************