dac调试出现BUG?? SystemInit放在主函数则无法输出正弦波，放在子函数里面就可以？？求解答？？

sdsd555a

/**

  ******************************************************************************

  * @file    roject/Template/main.c 

  * @author  MCD Application Team

  * @version V3.0.0

  * @date    04/06/2009

  * @brief   Main program body

  ******************************************************************************

  * @copy

  *

  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE

  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY

  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING

  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE

  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

  *

  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>

  */ 

/* Includes ------------------------------------------------------------------*/

#include "stm32f10x.h"

#include "main.h"

//#include "delay.h"

#include <stdio.h>

//#include "usart.h"

#include "sys.h"

#include "ili9320.h"

#include "ili9320_api.h"

//#include "ili9320_font.h"

#include "ARMJISHU_TouchScreen_ADS7843.h"

#include "picture.h"

#include "delay.h"

#include "ad9850_stm32_driver.h"

#include "key.h"

#include "max262.h"

#include "dac.h"

#include "sys.h"

#include "timdds.h"

#include "usart.h"

//#include "dacsine.h"

#include "adcbydma.h"

#define ADC1_DR_Address    ((u32)0x4001244C)//ADC外设地址

vu16 ADCConvertedValue;

double fcm_data[25];

#define DAC_DHR12RD_Address      0x40007420

const uint16_t Sine12bit[32] = {

                      2047, 2447, 2831, 3185, 3498, 3750, 3939, 4056, 4095, 4056,

                      3939, 3750, 3495, 3185, 2831, 2447, 2047, 1647, 1263, 909, 

                      599, 344, 155, 38, 0, 38, 155, 344, 599, 909, 1263, 1647};

uint32_t DualSine12bit[32];

uint8_t Idx = 0;

void dacsine(void)

{

  

      GPIO_InitTypeDef GPIO_InitStructure;

 

/* Init Structure definition */

DAC_InitTypeDef            DAC_InitStructure;

DMA_InitTypeDef            DMA_InitStructure;

TIM_TimeBaseInitTypeDef    TIM_TimeBaseStructure;  

   SystemInit();   //为什么SytemInit放在此处，才能输出正确的正弦波？？

 /* Enable peripheral clocks ------------------------------------------------*/

   RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);

  /* GPIOA Periph clock enable */

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  /* DAC Periph clock enable */

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

  /* TIM2 Periph clock enable */

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); 

  /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically 

     connected to the DAC converter. In order to avoid parasitic consumption, 

     the GPIO pin should be configured in analog */

  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_4 | GPIO_Pin_5;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* TIM2 Configuration */

  /* Time base configuration */

  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); 

  TIM_TimeBaseStructure.TIM_Period = 0x4b;          

  TIM_TimeBaseStructure.TIM_Prescaler = 0x0;       

  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;    

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  

  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  /* TIM2 TRGO selection */

  TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Update);

  /* DAC channel1 Configuration */

  DAC_InitStructure.DAC_Trigger = DAC_Trigger_T2_TRGO;

  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;

  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;

  DAC_Init(DAC_Channel_1, &DAC_InitStructure);

  /* DAC channel2 Configuration */

  DAC_Init(DAC_Channel_2, &DAC_InitStructure);

  /* Fill Sine32bit table */

  for (Idx = 0; Idx < 32; Idx++)

  {

    DualSine12bit[Idx] = (Sine12bit[Idx] << 16) + (Sine12bit[Idx]);

  }

  DMA_DeInit(DMA2_Channel4);

  DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12RD_Address;

  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&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);

  /* Enable DMA2 Channel4 */

  DMA_Cmd(DMA2_Channel4, ENABLE);

  /* Enable DAC Channel1: Once the DAC channel1 is enabled, PA.04 is 

     automatically connected to the DAC converter. */

  DAC_Cmd(DAC_Channel_1, ENABLE);

  /* Enable DAC Channel2: Once the DAC channel2 is enabled, PA.05 is 

     automatically connected to the DAC converter. */

  DAC_Cmd(DAC_Channel_2, ENABLE);

  /* Enable DMA for DAC Channel2 */

  DAC_DMACmd(DAC_Channel_2, ENABLE);

  /* TIM2 enable counter */

  TIM_Cmd(TIM2, ENABLE);

}

int main(void)

{ 

  

    //SystemInit();//为什么SytemInit放在此处 就没有DAC正弦输出？？？

dacsine();

  // dacsine_init();

  

  /* Main loop */

  while (1) 

  {

  }

}

正点原子

仿真看看问题在哪里吧,这比较奇怪.

sdsd555a

回复【2楼】正点原子:
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单步调试了 也没有问题，后来重新建立工程之后 解决问题了。。。

正点原子

回复【3楼】sdsd555a:
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诡异。