wang12zhe-29129 发表于 2015-6-17 11:07:25

STM32F407的 DAM疑问



使用库文件的Demo程序，配合ST官方Demo板，


下载库文件的Demo程序，发送使用DMA时，DAC没有输出，
反复修改，
最后将两个DAC都配置成Stream5 Chanel7 两个通道都正常输出，

但是数据手册了上DAC2应该是Sream6 Channel7,   根据手册配置的话 DAC1和DAC2 都没有输出

这是怎么回事，

下边是我的源程序

/**
******************************************************************************
* @file    DAC_SignalsGeneration/main.c
* @authorMCD Application Team
* @version V1.0.0
* @date    19-September-2011
* @brief   Main program body.
******************************************************************************
* @attention
*
* 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 2011 STMicroelectronics</center></h2>
******************************************************************************
*/

/* Includes ------------------------------------------------------------------*/
#include "stm32f4_discovery.h"

/** @addtogroup STM32F4_Discovery_Peripheral_Examples
* @{
*/

/** @addtogroup DAC_SignalsGeneration
* @{
*/

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define DAC_DHR12R2_ADDRESS    0x40007414
#define DAC_DHR8R1_ADDRESS   0x40007410

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
DAC_InitTypeDefDAC_InitStructure;

const uint16_t Sine12bit = {
                      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};
const uint8_t Escalator8bit = {0x0,0X11,0X22,0X33,0X44,0xFF};

__IO uint8_t SelectedWavesForm = 1;
__IO uint8_t KeyPressed = SET;

/* Private function prototypes -----------------------------------------------*/
void TIM6_Config(void);

void DAC_Ch1_EscalatorConfig(void);
void DAC_Ch2_SineWaveConfig(void);

void DAC_Ch1_NoiseConfig(void);
void DAC_Ch2_TriangleConfig(void);

/* Private functions ---------------------------------------------------------*/

/**
* @brief   Main program
* @paramNone
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f4xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f4xx.c file
   */   

/* Preconfiguration before using DAC----------------------------------------*/
GPIO_InitTypeDef GPIO_InitStructure;

/* DMA1 clock and GPIOA clock enable (to be used with DAC) */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1 | RCC_AHB1Periph_GPIOA, ENABLE);

/* DAC Periph clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

/* DAC channel 1 & 2 (DAC_OUT1 = PA.4)(DAC_OUT2 = PA.5) configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* TIM6 Configuration ------------------------------------------------------*/
TIM6_Config();

/* Configures User Button */
STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_EXTI);

DAC_Ch1_EscalatorConfig();


      /* Sine Wave generator -----------------------------------------------*/
DAC_Ch2_SineWaveConfig();

while (1)
{
    /* If the User Button is pressed */
    if (KeyPressed == RESET)
    {            
      DAC_DeInit();
    }

      /* select waves forms according to the Key Button status */
      if (SelectedWavesForm == 1)    //SelectedWavesForm 已经设置成1
      {
      /* The sine wave and the escalator wave has been selected */
       //   DAC_Ch1_EscalatorConfig();==========注释掉这部分，移动到while (1)前


      /* Escalator Wave generator ------------------------------------------*/
       // DAC_Ch2_SineWaveConfig();==========注释掉这部分，移动到while (1)前
      }
      else
      {
      /* The triangle wave and the noise wave has been selected */

      /* Noise Wave generator ----------------------------------------------*/
      //DAC_Ch1_NoiseConfig();

      /* Triangle Wave generator -------------------------------------------*/
      DAC_Ch2_TriangleConfig();
      }

      KeyPressed = SET;

}
}

/**
* @briefTIM6 Configuration
* @note   TIM6 configuration is based on CPU @168MHz and APB1 @42MHz
* @note   TIM6 Update event occurs each 37.5MHz/256 = 16.406 KHz   
* @paramNone
* @retval None
*/
void TIM6_Config(void)
{
TIM_TimeBaseInitTypeDef    TIM_TimeBaseStructure;
/* TIM6 Periph clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);

/* Time base configuration */
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = 0xFF;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure);

/* TIM6 TRGO selection */
TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update);

/* TIM6 enable counter */
TIM_Cmd(TIM6, ENABLE);
}

/**
* @briefDACChannel2 SineWave Configuration
* @paramNone
* @retval None
*/
void DAC_Ch2_SineWaveConfig(void)
{
DMA_InitTypeDef DMA_InitStructure;

/* DAC channel2 Configuration */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_2, &DAC_InitStructure);
//这部分注释应该有问题，手册上DAC2对应Stream6 Channel7
/* DMA1_Stream5 channel7 configuration **************************************/
DMA_DeInit(DMA1_Stream5);
DMA_InitStructure.DMA_Channel = DMA_Channel_7;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)DAC_DHR12R2_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&Sine12bit;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
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_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream5, &DMA_InitStructure);

/* Enable DMA1_Stream5 */
DMA_Cmd(DMA1_Stream5, ENABLE);

/* Enable DAC Channel2 */
DAC_Cmd(DAC_Channel_2, ENABLE);

/* Enable DMA for DAC Channel2 */
DAC_DMACmd(DAC_Channel_2, ENABLE);
}

/**
* @briefDAC Channel1 Escalator Configuration
* @paramNone
* @retval None
*/
void DAC_Ch1_EscalatorConfig(void)
{
DMA_InitTypeDef DMA_InitStructure;

/* DAC channel1 Configuration */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1, &DAC_InitStructure);
//这部分注释应该有问题，手册上DAC2对应Stream5 Channel7
/* DMA1_Stream6 channel7 configuration **************************************/
DMA_DeInit(DMA1_Stream5);
DMA_InitStructure.DMA_Channel = DMA_Channel_7;
DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR8R1_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&Escalator8bit;
DMA_InitStructure.DMA_BufferSize = 6;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream6, &DMA_InitStructure);   

/* Enable DMA1_Stream6 */
DMA_Cmd(DMA1_Stream6, ENABLE);

/* Enable DAC Channel1 */
DAC_Cmd(DAC_Channel_1, ENABLE);

/* Enable DMA for DAC Channel1 */
DAC_DMACmd(DAC_Channel_1, ENABLE);
}

/**
* @briefDAC Channel2 Triangle Configuration
* @paramNone
* @retval None
*/
void DAC_Ch2_TriangleConfig(void)
{
/* DAC channel2 Configuration */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Triangle;
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_1023;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_2, &DAC_InitStructure);

/* Enable DAC Channel2 */
DAC_Cmd(DAC_Channel_2, ENABLE);

/* Set DAC channel2 DHR12RD register */
DAC_SetChannel2Data(DAC_Align_12b_R, 0x100);
}

/**
* @briefDACChannel1 Noise Configuration
* @paramNone
* @retval None
*/
void DAC_Ch1_NoiseConfig(void)
{
/* DAC channel1 Configuration */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_Noise;
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bits10_0;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1, &DAC_InitStructure);

/* Enable DAC Channel1 */
DAC_Cmd(DAC_Channel_1, ENABLE);

/* Set DAC Channel1 DHR12L register */
DAC_SetChannel1Data(DAC_Align_12b_L, 0x7FF0);
}

#ifdefUSE_FULL_ASSERT

/**
* @briefReports the name of the source file and the source line number
*         where the assert_param error has occurred.
* @paramfile: pointer to the source file name
* @paramline: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
   ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

/* Infinite loop */
while (1)
{
}
}
#endif

/**
* @}
*/

/**
* @}
*/

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/


creep 发表于 2015-6-17 11:53:29

标题应该是DMA吧，

mark0668 发表于 2015-6-17 12:27:43

creep 发表于 2015-6-17 11:53
标题应该是DMA吧，

我也这么说.

wang12zhe-29129 发表于 2015-6-17 17:21:51

mark0668 发表于 2015-6-17 12:27
我也这么说.

额笔误 台粗心了，，

希望大家不要介意 :'(
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