STM32F103 USART DMA KESME

Başlatan burak54, 17 Haziran 2017, 22:05:32

burak54

Herkese Merhaba,
STM32F103 ile USART tan gelen veriyi DMA ile alıp diziye atarmak istiyorum veri gelişi bittiginde kesme oluşması lazım. Bu konuda tecrübesi olan arkadaşlar var mı ?

burak54


Cemre.

Söylediğiniz mümkün ancak siz nasıl bir bilgi istiyorsunuz?

burak54

Merhaba [member=29293]Cemre.[/member] 


Örnek bir kod var mı diye yazmıştım. Aşağıda yaptıgım ornekte 1 karekter veri yollayınca kesmeye giriyor geriye C yolluyor ama tekrar yollayınca kesmeye girmiyor veri yollamıyor takılıyor.


#include "stm32f10x.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_gpio.h"
#include "delay.h"
#include "lcd16x2.h"
#include "stm32f10x_adc.h"
#include "stm32f10x_usart.h"
#include <stdio.h>
#include "stm32f10x_conf.h"
#include "stm32f10x_dma.h"
   
char databuff[20];

void USART_Configuration(void);
void DMA_Configuration(void);
void NVIC_Configuration(void);
void RCC_Configuration(void);

static unsigned int LEDState = 0;

int main(void)
{
  GPIO_InitTypeDef GPIO_InitStructure1;
  RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOC , ENABLE);   
  GPIO_InitStructure1.GPIO_Pin = GPIO_Pin_14 | GPIO_Pin_13 ;
  GPIO_InitStructure1.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStructure1.GPIO_Mode = GPIO_Mode_Out_PP; 
  GPIO_Init(GPIOC, &GPIO_InitStructure1);

RCC_Configuration();
USART_Configuration();
NVIC_Configuration();   
DMA_Configuration();

   while (1)
   {
     
   }

}


void USART_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
  RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1,ENABLE);
           
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;           
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
  GPIO_Init(GPIOA, &GPIO_InitStructure);         

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;           
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; 
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  USART_InitStructure.USART_BaudRate = 9600;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
     
  USART_Init(USART1, &USART_InitStructure);
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
  USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
  USART_Cmd(USART1, ENABLE);
   
}

void DMA_Configuration(void)
{
  DMA_InitTypeDef  DMA_InitStructure;

  DMA_DeInit(DMA1_Channel5);

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; // Receive
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)Buffer;
  DMA_InitStructure.DMA_BufferSize = (uint16_t)1;
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&USART1->DR;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

  DMA_Init(DMA1_Channel5, &DMA_InitStructure);

  /* Enable the USART Rx DMA request */
  USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);

  /* Enable DMA Stream Half Transfer and Transfer Complete interrupt */
  DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE);

  /* Enable the DMA RX Stream */
  DMA_Cmd(DMA1_Channel5, ENABLE);
 
}


void DMA1_Channel5_IRQHandler(void)
{
  /* Test on DMA Stream Transfer Complete interrupt */
  if (DMA_GetITStatus(DMA1_IT_TC5))
  {
    /* Clear DMA Stream Transfer Complete interrupt pending bit */
    DMA_ClearITPendingBit(DMA1_IT_TC5);

    USART_SendData(USART1, 'C');
  }
   
}
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure the Priority Group to 2 bits */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

  /* Enable the UART4 RX DMA Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void RCC_Configuration(void)
{
  RCC_AHBPeriphClockCmd( RCC_AHBPeriph_DMA1, ENABLE);

}


skara1214

Data length sabit ise dmada numberi buna göre ayarlayip dma finishte interrupt olusurabilirsiniz
Herkes ölür ama herkes gerçekten yaşamaz

burak54

#5
@skara1214 şu anda sabit gönderiyorum test edebilmek için o yüzden 1 yazdım oraya 1 karakter yani 1 Byte veri yolluyorum


void DMA1_Channel5_IRQHandler(void)
{
  /* Test on DMA Stream Transfer Complete interrupt */
  if (DMA_GetITStatus(DMA1_IT_TC5))
  {
    /* Clear DMA Stream Transfer Complete interrupt pending bit */
    DMA_ClearITPendingBit(DMA1_IT_TC5);

    USART_SendData(USART1, 'C');
  }
   
}





1 karakter gönderince bir kere buraya giriyor ve bana C yolluyor ancak 2. kere yollayınca hiç birsey yapmıyor





burak54

Kesme Çalıştı ancak Buffer a geleni göremiyorum

burak54

Arkadaşlar Buffer ı da okudum ancak sacma degerler geliyor 1 kere okuduktan sonra. Diger konu ise TX DMA kullanan oldu mu USART ta ?

robikod

Alıntı yapılan: burak54 - 27 Haziran 2017, 11:02:47
Arkadaşlar Buffer ı da okudum ancak sacma degerler geliyor 1 kere okuduktan sonra. Diger konu ise TX DMA kullanan oldu mu USART ta ?

Seri porttan, göndermek istediğin verinin hexadecimal karşılığını göndermeyi dene.