stm32锯齿波c语言程序,关于STM32如何产生锯齿波，利用DAC

小咪咪 2022-10-15 00:36 368阅读 0赞

回复【10楼】许金秧:

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这是我改的，用万用表测电压变化感觉上很像，麻烦请同学帮忙看看这行不？

\#include "stm32f10x.h"

/\*\* @addtogroup STM32F10x\_StdPeriph\_Examples

\* @\{

\*/

/\*\* @addtogroup DAC\_DualModeDMA\_SineWave

\* @\{

\*/

/\*&nbsp

![titter.gif][]rivate typedef -----------------------------------------------------------\*/

/\*&nbsp

![titter.gif][]rivate define ------------------------------------------------------------\*/

\#define DAC\_DHR12RD\_Address      0x40007420

/\* Init Structure definition \*/

DAC\_InitTypeDef            DAC\_InitStructure;

DMA\_InitTypeDef            DMA\_InitStructure;

TIM\_TimeBaseInitTypeDef    TIM\_TimeBaseStructure;

uint32\_t Idx = 0;

/\*&nbsp

![titter.gif][]rivate macro -------------------------------------------------------------\*/

/\*&nbsp

![titter.gif][]rivate variables ---------------------------------------------------------\*/

const uint16\_t Sine12bit\[32\] = \{0,256,512,768,1024,1280,1536,1792,2048,2304,2560,2816,3072,3328,3584,3840,0,256,512,768,1024,1280,1536,1792,2048,2304,2560,2816,3072,3328,3584,3840\};

uint32\_t DualSine12bit\[32\];

/\*&nbsp

![titter.gif][]rivate function prototypes -----------------------------------------------\*/

void RCC\_Configuration(void);

void GPIO\_Configuration(void);

void Delay(\_\_IO uint32\_t nCount);

void DAC\_StructInit(DAC\_InitTypeDef\* DAC\_InitStruct);

/\*&nbsp

![titter.gif][]rivate functions ---------------------------------------------------------\*/

/\*\*

\* @brief   Main program.

\* @param  None

\* @retval None

\*/

int main(void)

/\*!

this is done through SystemInit() function which is called from startup

file (startup\_stm32f10x\_xx.s) before to branch to application main.

To reconfigure the default setting of SystemInit() function, refer to

system\_stm32f10x.c file

\*/

/\* System Clocks Configuration \*/

RCC\_Configuration();

/\* 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\_Configuration();

/\* TIM2 Configuration \*/

/\* Time base configuration \*/

TIM\_TimeBaseStructInit(&TIM\_TimeBaseStructure);

TIM\_TimeBaseStructure.TIM\_Period = 9999;

TIM\_TimeBaseStructure.TIM\_Prescaler =719;

TIM\_TimeBaseStructure.TIM\_ClockDivision =TIM\_CKD\_DIV1  ;

TIM\_TimeBaseStructure.TIM\_CounterMode = TIM\_CounterMode\_Up;

TIM\_TimeBaseInit(TIM2, &TIM\_TimeBaseStructure);

/\* TIM2 TRGO selection \*/

TIM\_SelectOutputTrigger(TIM2, TIM\_TRGOSource\_Update);

DAC\_StructInit(&DAC\_InitStructure);

/\* 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);

for (Idx = 0; Idx

DualSine12bit\[Idx\] = (Sine12bit\[Idx\] <

/\* Fill Sine32bit table \*/

\#if !defined STM32F10X\_LD\_VL && !defined STM32F10X\_MD\_VL

/\* DMA2 channel4 configuration \*/

DMA\_DeInit(DMA2\_Channel4);

\#else

/\* DMA1 channel4 configuration \*/

DMA\_DeInit(DMA1\_Channel4);

\#endif

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;

\#if !defined STM32F10X\_LD\_VL && !defined STM32F10X\_MD\_VL

DMA\_Init(DMA2\_Channel4, &DMA\_InitStructure);

/\* Enable DMA2 Channel4 \*/

DMA\_Cmd(DMA2\_Channel4, ENABLE);

\#else

DMA\_Init(DMA1\_Channel4, &DMA\_InitStructure);

/\* Enable DMA1 Channel4 \*/

DMA\_Cmd(DMA1\_Channel4, ENABLE);

\#endif

/\* Enable DAC Channel1: Once the DAC channel1 is enabled,&nbsp

![titter.gif][]A.04 is

automatically connected to the DAC converter. \*/

DAC\_Cmd(DAC\_Channel\_1, ENABLE);

/\* Enable DAC Channel2: Once the DAC channel2 is enabled,&nbsp

![titter.gif][]A.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);

while (1)

/\*\*

\* @brief  Configures the different system clocks.

\* @param  None

\* @retval None

\*/

void RCC\_Configuration(void)

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

\#if !defined STM32F10X\_LD\_VL && !defined STM32F10X\_MD\_VL

/\* DMA2 clock enable \*/

RCC\_AHBPeriphClockCmd(RCC\_AHBPeriph\_DMA2, ENABLE);

\#else

/\* DMA1 clock enable \*/

RCC\_AHBPeriphClockCmd(RCC\_AHBPeriph\_DMA1, ENABLE);

\#endif

/\* GPIOA&nbsp

![titter.gif][]eriph clock enable \*/

RCC\_APB2PeriphClockCmd(RCC\_APB2Periph\_GPIOA, ENABLE);

/\* DAC&nbsp

![titter.gif][]eriph clock enable \*/

RCC\_APB1PeriphClockCmd(RCC\_APB1Periph\_DAC, ENABLE);

/\* TIM2 Periph clock enable \*/

RCC\_APB1PeriphClockCmd(RCC\_APB1Periph\_TIM2, ENABLE);

/\*\*

\* @brief  Configures the different GPIO ports.

\* @param  None

\* @retval None

\*/

void GPIO\_Configuration(void)

GPIO\_InitTypeDef GPIO\_InitStructure;

/\* 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);

/\*\*

\* @brief  Inserts a delay time.

\* @param  nCount: specifies the delay time length.

\* @retval None

\*/

void Delay(\_\_IO uint32\_t nCount)

for(; nCount != 0; nCount--);

\#ifdef  USE\_FULL\_ASSERT

/\*\*

\* @brief  Reports the name of the source file and the source line number

\*         where the assert\_param error has occurred.

\* @param  file: pointer to the source file name

\* @param  line: 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

[titter.gif]: http://www.openedv.com/posts/list/static/image/smiley/default/titter.gif

stm32锯齿波c语言程序,关于STM32如何产生锯齿波，利用DAC

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