野火教程DAC输出正玄波失败问题

Fszz1989

按野火的零死角STM32-V2  DAC输出正玄波。定时器触发DAC转换，DAC数据靠DMA自动循环输入，示波器没反应，用的是STM32F103C8T6单片机。希望大神帮我看看有什么问题配置上
#include "stm32f10x.h"
#include "stm32f10x_dac.h"
#include "stm32f10x_dma.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_tim.h"

void DAC_Mode_Init(void);
void DAC_TIM_Config(void);
void DAC_Config(void);
void DAC_DMA_Config(void);
const uint16_t Sine12bit[32] = {
2448,2832,3186,3496,3751,3940,4057,4095,4057,3940,
3751,3496,3186,2832,2448,2048,1648,1264,910,600,345,
156,39,0,39,156,345,600,910,1264,1648,2048};

#define DAC_DHR12RD_Address      0x40007420//Ë«í¨μàdacíaéè′«êäμØÖ·

uint32_t DualSine12bit[32];

int main(void)
{
  DAC_Mode_Init();
        while (1);
}
void DAC_Mode_Init(void)
{
uint32_t Idx = 0;
for (Idx = 0; Idx < 32; Idx++)
        {
                DualSine12bit[Idx] = (Sine12bit[Idx] << 16) + (Sine12bit[Idx]);
        }
DAC_Config();
DAC_TIM_Config();
DAC_DMA_Config();
/* */

}
void DAC_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
DAC_InitTypeDef DAC_InitStructure;

/* ??GPIOA ?? */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

/* ??DAC ?? */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

/* DAC GPIO  */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
       
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
        GPIO_Init(GPIOA, &GPIO_InitStructure);
         
       
        DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO; //TIM2
        DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None; //
        DAC_InitStructure.DAC_OutputBuffer= DAC_OutputBuffer_Disable;//
        DAC_Init(DAC_Channel_1, &DAC_InitStructure);
         
        DAC_Init(DAC_Channel_2, &DAC_InitStructure);
        // PA4
        DAC_Cmd(DAC_Channel_1, ENABLE);
        // PA5
        DAC_Cmd(DAC_Channel_2, ENABLE);
       
        DAC_DMACmd(DAC_Channel_2, ENABLE);
}
       
void DAC_TIM_Config(void)
        {
                TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
                /* 72M */
                RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
                /* TIM2 */
                TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
                TIM_TimeBaseStructure.TIM_Period = 19;  //72Mhz &#207;&#194;20&#184;&#246;&#214;ü&#198;úò&#187;′&#206;′￥·￠DMA
                TIM_TimeBaseStructure.TIM_Prescaler = 0x0;
                TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
                TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
                TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
                TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);
                /* TIM2 */
                TIM_Cmd(TIM2, ENABLE);
        }
       
void DAC_DMA_Config(void)
{
         DMA_InitTypeDef DMA_InitStructure;

         /* DMA2  */
         RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
         /* DMA2 */
         DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12RD_Address; //
         DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&DualSine12bit ; //        &#196;ú′&#230;êy&#190;Yμ&#216;&#214;·DualSine12bit

         DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; //
         DMA_InitStructure.DMA_BufferSize = 32; //
         DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //
         DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //
         DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; //

         DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;//
         DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //
         DMA_InitStructure.DMA_Priority = DMA_Priority_High;
         DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //

         DMA_Init(DMA2_Channel4, &DMA_InitStructure);

         /* DMA2-4 */
         DMA_Cmd(DMA2_Channel4, ENABLE);
}

Fszz1989

十万火急，求助

笑你像狗

不要改火哥的程序，然后检查下引脚在你的板子是不是用在其它地方了