请完成下面任务：写出基于f28335的DA输出的c语言的代码利用三个引脚分别输出sincos和方波，同时列出使用了那些库函数代码，同时也写出引脚初始化的函数

以下是基于f28335的DA输出的C语言代码，利用三个引脚分别输出sincos和方波：

#include "F2837xD_device.h"
#include "F2837xD_Examples.h"
#include "math.h"

#define SINE_TABLE_SIZE 256

#pragma CODE_SECTION(DAC_init, "ramfuncs");

Uint16 sine_table[SINE_TABLE_SIZE];

void DAC_init(void);

void main(void)
{
    Uint16 i = 0;

    for (i = 0; i < SINE_TABLE_SIZE; i++)
    {
        sine_table[i] = (Uint16)(32767 * sin(2 * PI * i / SINE_TABLE_SIZE) + 32768);
    }

    EALLOW;
    GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1;
    GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1;
    GpioCtrlRegs.GPAMUX1.bit.GPIO2 = 1;
    EDIS;

    DAC_init();

    while (1)
    {
        for (i = 0; i < SINE_TABLE_SIZE; i++)
        {
            DacaRegs.DACVALS.bit.DACVALA = sine_table[i];
            DacbRegs.DACVALS.bit.DACVALB = sine_table[i];
            DaccRegs.DACVALS.bit.DACVALC = i < (SINE_TABLE_SIZE / 2) ? 0 : 65535;
            DELAY_US(1000);
        }
    }
}

void DAC_init(void)
{
    EALLOW;
    DacaRegs.DACCTL.bit.DACREFSEL = 1;
    DacaRegs.DACCTL.bit.LOADMODE = 1;
    DacaRegs.DACOUTEN.bit.DACOUTEN = 1;
    DacaRegs.DACVALS.bit.DACVALA = 0;

    DacbRegs.DACCTL.bit.DACREFSEL = 1;
    DacbRegs.DACCTL.bit.LOADMODE = 1;
    DacbRegs.DACOUTEN.bit.DACOUTEN = 1;
    DacbRegs.DACVALS.bit.DACVALB = 0;

    DaccRegs.DACCTL.bit.DACREFSEL = 1;
    DaccRegs.DACCTL.bit.LOADMODE = 1;
    DaccRegs.DACOUTEN.bit.DACOUTEN = 1;
    DaccRegs.DACVALS.bit.DACVALC = 0;
    EDIS;
}

上述代码中使用了 `math.h` 库函数来生成三角函数，同时也使用了 `F2837xD_device.h` 和 `F2837xD_Examples.h` 库函数来初始化引脚和 DAC。其中，`DAC_init()` 函数用于初始化 DAC 引脚。以下是引脚初始化的函数：

void InitGpio(void)
{
    EALLOW;

    // Enable GPIO pins for DAC
    GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1;
    GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 1;
    GpioCtrlRegs.GPAMUX1.bit.GPIO2 = 1;

    // Configure GPIO pins for DAC
    GpioCtrlRegs.GPADIR.bit.GPIO0 = 1;
    GpioCtrlRegs.GPADIR.bit.GPIO1 = 1;
    GpioCtrlRegs.GPADIR.bit.GPIO2 = 1;

    // Set GPIO pins to default state
    GpioDataRegs.GPADAT.bit.GPIO0 = 0;
    GpioDataRegs.GPADAT.bit.GPIO1 = 0;
    GpioDataRegs.GPADAT.bit.GPIO2 = 0;

    EDIS;
}