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请问TM4C1294 GPIO PA都没有输出。功能是不是少打设定功能。其他脚位也是。例如PF PH PK PM

Other Parts Discussed in Thread: EK-TM4C1294XL


int main(void) {
SysCtlClockFreqSet((SYSCTL_XTAL_16MHZ |
SYSCTL_OSC_MAIN |
SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
GPIODirModeSet(GPIO_PORTA_BASE,GPIO_PIN_2,GPIO_DIR_MODE_OUT);
GPIOPinWrite(GPIO_PORTA_BASE, GPIO_PIN_2, GPIO_PIN_2);
while(1)
{}
}

  • 您可以看一下

    的 14.2.3.4 GPIODirModeSet 的相关说明

    另外您可以看一下 C:\ti\TivaWare_C_Series-2.1.4.178\examples\boards\ek-tm4c1294xl\drivers 内的pinout.c

    //*****************************************************************************
    //
    // pinout.c - Function to configure the device pins on the EK-TM4C1294XL.
    //
    // Copyright (c) 2013-2017 Texas Instruments Incorporated.  All rights reserved.
    // Software License Agreement
    // 
    // Texas Instruments (TI) is supplying this software for use solely and
    // exclusively on TI's microcontroller products. The software is owned by
    // TI and/or its suppliers, and is protected under applicable copyright
    // laws. You may not combine this software with "viral" open-source
    // software in order to form a larger program.
    // 
    // THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
    // NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
    // NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    // A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
    // CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
    // DAMAGES, FOR ANY REASON WHATSOEVER.
    // 
    // This is part of revision 2.1.4.178 of the EK-TM4C1294XL Firmware Package.
    //
    //*****************************************************************************
    
    #include <stdbool.h>
    #include <stdint.h>
    #include "inc/hw_gpio.h"
    #include "inc/hw_memmap.h"
    #include "inc/hw_types.h"
    #include "driverlib/gpio.h"
    #include "driverlib/pin_map.h"
    #include "driverlib/rom.h"
    #include "driverlib/rom_map.h"
    #include "driverlib/sysctl.h"
    #include "drivers/pinout.h"
    
    //*****************************************************************************
    //
    //! \addtogroup pinout_api
    //! @{
    //
    //*****************************************************************************
    
    //*****************************************************************************
    //
    //! Configures the device pins for the standard usages on the EK-TM4C1294XL.
    //!
    //! \param bEthernet is a boolean used to determine function of Ethernet pins.
    //! If true Ethernet pins are  configured as Ethernet LEDs.  If false GPIO are
    //! available for application use.
    //! \param bUSB is a boolean used to determine function of USB pins. If true USB
    //! pins are configured for USB use.  If false then USB pins are available for
    //! application use as GPIO.
    //!
    //! This function enables the GPIO modules and configures the device pins for
    //! the default, standard usages on the EK-TM4C1294XL.  Applications that
    //! require alternate configurations of the device pins can either not call
    //! this function and take full responsibility for configuring all the device
    //! pins, or can reconfigure the required device pins after calling this
    //! function.
    //!
    //! \return None.
    //
    //*****************************************************************************
    void
    PinoutSet(bool bEthernet, bool bUSB)
    {
        //
        // Enable all the GPIO peripherals.
        //
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOH);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOJ);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOK);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOM);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPION);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOP);
        ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOQ);
    
        //
        // PA0-1 are used for UART0.
        //
        ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
        ROM_GPIOPinConfigure(GPIO_PA1_U0TX);
        ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    
        //
        // PB0-1/PD6/PL6-7 are used for USB.
        // PQ4 can be used as a power fault detect on this board but it is not
        // the hardware peripheral power fault input pin.
        //
        if(bUSB)
        {
            HWREG(GPIO_PORTD_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY;
            HWREG(GPIO_PORTD_BASE + GPIO_O_CR) = 0xff;
            ROM_GPIOPinConfigure(GPIO_PD6_USB0EPEN);
            ROM_GPIOPinTypeUSBAnalog(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
            ROM_GPIOPinTypeUSBDigital(GPIO_PORTD_BASE, GPIO_PIN_6);
            ROM_GPIOPinTypeUSBAnalog(GPIO_PORTL_BASE, GPIO_PIN_6 | GPIO_PIN_7);
            ROM_GPIOPinTypeGPIOInput(GPIO_PORTQ_BASE, GPIO_PIN_4);
        }
        else
        {
            //
            // Keep the default config for most pins used by USB.
            // Add a pull down to PD6 to turn off the TPS2052 switch
            //
            ROM_GPIOPinTypeGPIOInput(GPIO_PORTD_BASE, GPIO_PIN_6);
            MAP_GPIOPadConfigSet(GPIO_PORTD_BASE, GPIO_PIN_6, GPIO_STRENGTH_2MA,
                                 GPIO_PIN_TYPE_STD_WPD);
    
        }
    
        //
        // PF0/PF4 are used for Ethernet LEDs.
        //
        if(bEthernet)
        {
            //
            // this app wants to configure for ethernet LED function.
            //
            ROM_GPIOPinConfigure(GPIO_PF0_EN0LED0);
            ROM_GPIOPinConfigure(GPIO_PF4_EN0LED1);
    
            GPIOPinTypeEthernetLED(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4);
    
        }
        else
        {
    
            //
            // This app does not want Ethernet LED function so configure as
            // standard outputs for LED driving.
            //
            ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4);
    
            //
            // Default the LEDs to OFF.
            //
            ROM_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4, 0);
            MAP_GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_4,
                                 GPIO_STRENGTH_12MA, GPIO_PIN_TYPE_STD);
    
    
        }
    
        //
        // PJ0 and J1 are used for user buttons
        //
        ROM_GPIOPinTypeGPIOInput(GPIO_PORTJ_BASE, GPIO_PIN_0 | GPIO_PIN_1);
        ROM_GPIOPinWrite(GPIO_PORTJ_BASE, GPIO_PIN_0 | GPIO_PIN_1, 0);
    
        //
        // PN0 and PN1 are used for USER LEDs.
        //
        ROM_GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1);
        MAP_GPIOPadConfigSet(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1,
                                 GPIO_STRENGTH_12MA, GPIO_PIN_TYPE_STD);
    
        //
        // Default the LEDs to OFF.
        //
        ROM_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0 | GPIO_PIN_1, 0);
    }
    
    //*****************************************************************************
    //
    //! This function writes a state to the LED bank.
    //!
    //! \param ui32LEDMask is a bit mask for which GPIO should be changed by this
    //! call.
    //! \param ui32LEDValue is the new value to be applied to the LEDs after the
    //! ui32LEDMask is applied.
    //!
    //! The first parameter acts as a mask.  Only bits in the mask that are set
    //! will correspond to LEDs that may change.  LEDs with a mask that is not set
    //! will not change. This works the same as GPIOPinWrite. After applying the
    //! mask the setting for each unmasked LED is written to the corresponding
    //! LED port pin via GPIOPinWrite.
    //!
    //! \return None.
    //
    //*****************************************************************************
    void
    LEDWrite(uint32_t ui32LEDMask, uint32_t ui32LEDValue)
    {
    
        //
        // Check the mask and set or clear the LED as directed.
        //
        if(ui32LEDMask & CLP_D1)
        {
            if(ui32LEDValue & CLP_D1)
            {
                GPIOPinWrite(CLP_D1_PORT, CLP_D1_PIN, CLP_D1_PIN);
            }
            else
            {
                GPIOPinWrite(CLP_D1_PORT, CLP_D1_PIN, 0);
            }
        }
    
        if(ui32LEDMask & CLP_D2)
        {
            if(ui32LEDValue & CLP_D2)
            {
                GPIOPinWrite(CLP_D2_PORT, CLP_D2_PIN, CLP_D2_PIN);
            }
            else
            {
                GPIOPinWrite(CLP_D2_PORT, CLP_D2_PIN, 0);
            }
        }
    
        if(ui32LEDMask & CLP_D3)
        {
            if(ui32LEDValue & CLP_D3)
            {
                GPIOPinWrite(CLP_D3_PORT, CLP_D3_PIN, CLP_D3_PIN);
            }
            else
            {
                GPIOPinWrite(CLP_D3_PORT, CLP_D3_PIN, 0);
            }
        }
    
        if(ui32LEDMask & CLP_D4)
        {
            if(ui32LEDValue & CLP_D4)
            {
                GPIOPinWrite(CLP_D4_PORT, CLP_D4_PIN, CLP_D4_PIN);
            }
            else
            {
                GPIOPinWrite(CLP_D4_PORT, CLP_D4_PIN, 0);
            }
        }
    }
    
    //*****************************************************************************
    //
    //! This function reads the state to the LED bank.
    //!
    //! \param pui32LEDValue is a pointer to where the LED value will be stored.
    //!
    //! This function reads the state of the CLP LEDs and stores that state
    //! information into the variable pointed to by pui32LEDValue.
    //!
    //! \return None.
    //
    //*****************************************************************************
    void LEDRead(uint32_t *pui32LEDValue)
    {
        *pui32LEDValue = 0;
    
        //
        // Read the pin state and set the variable bit if needed.
        //
        if(GPIOPinRead(CLP_D4_PORT, CLP_D4_PIN))
        {
            *pui32LEDValue |= CLP_D4;
        }
    
        //
        // Read the pin state and set the variable bit if needed.
        //
        if(GPIOPinRead(CLP_D3_PORT, CLP_D3_PIN))
        {
            *pui32LEDValue |= CLP_D3;
        }
    
        //
        // Read the pin state and set the variable bit if needed.
        //
        if(GPIOPinRead(CLP_D2_PORT, CLP_D2_PIN))
        {
            *pui32LEDValue |= CLP_D2;
        }
    
        //
        // Read the pin state and set the variable bit if needed.
        //
        if(GPIOPinRead(CLP_D1_PORT, CLP_D1_PIN))
        {
            *pui32LEDValue |= CLP_D1;
        }
    }
    
    //*****************************************************************************
    //
    // Close the Doxygen group.
    //! @}
    //
    //*****************************************************************************
    

  • 很高兴能帮到您!