tm4c1230h6pm 的PWM-TI中文支持网

unresolved symbol FPUEnable, first referenced in ./main.obj CH2_1 C/C++ Problem

unresolved symbol FPULazyStackingEnable, first referenced in ./main.obj CH2_1 C/C++ Problem

这是什么情况啊？？？请大神指教！！！

#include <stdint.h>

#include <stdbool.h>

#include "inc/hw_memmap.h"

#include "inc/hw_types.h"

#include "driverlib/sysctl.h"

#include "driverlib/rom.h"

#include "driverlib/gpio.h"

#include "driverlib/pwm.h"

#include "driverlib/fpu.h"

#include "driverlib/pin_map.h"

#include <inc\tm4c123gh6pm.h>

int main (void)

{

//使能

FPU FPUEnable();

FPULazyStackingEnable();

//设置系统时钟为50MHz

SysCtlClockSet(SYSCTL_SYSDIV_4 |SYSCTL_USE_PLL |SYSCTL_OSC_MAIN |SYSCTL_XTAL_16MHZ);

//使能PWM模块

ROM_SysCtlPeripheralEnable((SYSCTL_PERIPH_PWM0)||(SYSCTL_PERIPH_PWM1));

//使能PWM2和PWM3输出所在GPIO

ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOH);

//配置PH0/PH1为PWM功能

ROM_GPIOPinTypePWM(GPIO_PORTH_BASE, GPIO_PIN_0);

ROM_GPIOPinTypePWM(GPIO_PORTH_BASE, GPIO_PIN_1);

// PWM时钟配置：不分频

ROM_SysCtlPWMClockSet(SYSCTL_PWMDIV_1);

//配置PWM发生器1：加减计数

ROM_PWMGenConfigure(PWM_BASE,

PWM_GEN_0,PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);

//设置PWM发生器1的周期

ROM_PWMGenPeriodSet(PWM_BASE, PWM_GEN_0, 6000);

//设置PWM2/PWM3输出的脉冲宽度

ROM_PWMPulseWidthSet(PWM_BASE, PWM_OUT_0, 4200);

ROM_PWMPulseWidthSet(PWM_BASE, PWM_OUT_1, 1800);

//使能PWM2和PWM3的输出

ROM_PWMOutputState(PWM_BASE, (PWM_OUT_0_BIT |

PWM_OUT_1_BIT), true);

//使能PWM发生器1

ROM_PWMGenEnable(PWM0_BASE, PWM_GEN_0);

while(1); { }

}

这个PWM 程序有什么问题啊？？

FPU FPUEnable();

FPULazyStackingEnable();

这两句使能了没有用到吧，把这两句屏蔽掉