关于cortex-m4 UART的技术问题请教

我配置串口1，没有问题

//                        sensor.
//
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// 
// This is part of revision 2.1.4.178 of the Tiva Firmware Development Package.
//
//*****************************************************************************

#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_memmap.h"
#include "driverlib/adc.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/uart.h"
#include "utils/uartstdio.h"

//*****************************************************************************
//
//! \addtogroup adc_examples_list
//! <h1>ADC Temperature Sensor (temperature_sensor)</h1>
//!
//! This example shows how to setup ADC0 to read the internal temperature
//! sensor.
//!
//! NOTE: The internal temperature sensor is not calibrated.  This example
//! just takes the raw temperature sensor sample and converts it using the
//! equation found in the LM3S9B96 datasheet.
//!
//! This example uses the following peripherals and I/O signals.  You must
//! review these and change as needed for your own board:
//! - ADC0 peripheral
//!
//! The following UART signals are configured only for displaying console
//! messages for this example.  These are not required for operation of the
//! ADC.
//! - UART0 peripheral
//! - GPIO Port A peripheral (for UART0 pins)
//! - UART0RX - PA0
//! - UART0TX - PA1
//!
//! This example uses the following interrupt handlers.  To use this example
//! in your own application you must add these interrupt handlers to your
//! vector table.
//! - None.
//
//*****************************************************************************

//*****************************************************************************
//
// This function sets up UART0 to be used for a console to display information
// as the example is running.
//
//*****************************************************************************
void
InitConsole(void)
{
    //
    // Enable GPIO port A which is used for UART0 pins.
    // TODO: change this to whichever GPIO port you are using.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);

    //
    // Configure the pin muxing for UART0 functions on port A0 and A1.
    // This step is not necessary if your part does not support pin muxing.
    // TODO: change this to select the port/pin you are using.
    //
    GPIOPinConfigure(GPIO_PB0_U1RX);
    GPIOPinConfigure(GPIO_PB1_U1TX);

    //
    // Enable UART0 so that we can configure the clock.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_UART1);

    //
    // Use the internal 16MHz oscillator as the UART clock source.
    //
    UARTClockSourceSet(UART1_BASE, UART_CLOCK_PIOSC);

    //
    // Select the alternate (UART) function for these pins.
    // TODO: change this to select the port/pin you are using.
    //
    GPIOPinTypeUART(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Initialize the UART for console I/O.
    //
    UARTStdioConfig(1, 115200, 16000000);
}

int main(void)
{
    uint32_t ui32ADC0Value[4];
    volatile uint32_t ui32TempAvg;
    volatile uint32_t ui32TempValueC;
    volatile uint32_t ui32TempValueF;

    SysCtlClockSet(SYSCTL_SYSDIV_5|SYSCTL_USE_PLL|SYSCTL_OSC_MAIN|SYSCTL_XTAL_16MHZ);
    InitConsole();

    //
    // Display the setup on the console.
    //
    UARTprintf("ADC ->\n");
    UARTprintf("  Type: Internal Temperature Sensor\n");
    UARTprintf("  Samples: One\n");
    UARTprintf("  Update Rate: 250ms\n");
    UARTprintf("  Input Pin: Internal temperature sensor\n\n");
    //5分频，使用PLL，外部晶振16M，system时钟源选择 main osc。系统时钟40MHZ
    SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
    //使能ADC0
    ADCSequenceConfigure(ADC0_BASE, 1, ADC_TRIGGER_PROCESSOR, 0);
    //We want to use ADC0, sample sequencer 1,
    //we want the processor to trigger the sequence and we want to use the highest priority
    ADCSequenceStepConfigure(ADC0_BASE, 1, 0, ADC_CTL_TS);
    ADCSequenceStepConfigure(ADC0_BASE, 1, 1, ADC_CTL_TS);
    ADCSequenceStepConfigure(ADC0_BASE, 1, 2, ADC_CTL_TS);
    //Configure steps 0 - 2 on sequencer 1 to sample the temperature sensor (ADC_CTL_TS).
    ADCSequenceStepConfigure(ADC0_BASE,1,3,ADC_CTL_TS|ADC_CTL_IE|ADC_CTL_END);
    //Sample the temperature sensor (ADC_CTL_TS) and configure the interrupt flag (ADC_CTL_IE)
    //Tell the ADC logic that this is the last conversion on sequencer1 (ADC_CTL_END).
    ADCSequenceEnable(ADC0_BASE, 1);
    //enable ADC sequencer 1
    while(1)
    {
       ADCIntClear(ADC0_BASE, 1);
       ADCProcessorTrigger(ADC0_BASE, 1);
       //trigger the ADC conversion with software
       while(!ADCIntStatus(ADC0_BASE, 1, false))
       {
       }
       //wait for the conversion to complete
       ADCSequenceDataGet(ADC0_BASE, 1, ui32ADC0Value);
       ui32TempAvg = (ui32ADC0Value[0] + ui32ADC0Value[1] + ui32ADC0Value[2] + ui32ADC0Value[3] + 2)/4;
       //Since 2/4 = 1/2 = 0.5, 1.5 will be rounded to 2.0 with
       //the addition of 0.5. In the case of 1.0, when 0.5 is added to yield 1.5, this will be rounded
       //back down to 1.0 due to the rules of integer math.即四舍五入
       ui32TempValueC = (1475 - ((2475 * ui32TempAvg)) / 4096)/10;
       //TEMP = 147.5 – ((75 * (VREFP – VREFN) * ADCVALUE) / 4096)
       //VREFP – VREFN=3.3V
       ui32TempValueF = ((ui32TempValueC * 9) + 160) / 5;
       UARTprintf("Temperature = %d*C or %d*F\r\n", ui32TempValueC,
                  ui32TempValueF);
       //F = ( C * 9)/5 +32
    }
}

直接用的第三方的库，没用你的例程，但是肯定是可以的，继续检查细节吧。