Posted on May 29, 2015 at 12:46I am novice to ST family. I have added DMA1_Stream5 Handler in keil example. When I put breakpoint over there ,it is not executing .
Here is my code .
int main(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef dmaNvic;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/* Enable DMA Half & Complete interrupts */
DMA_ITConfig(DMA1_Stream5, DMA_IT_TC | DMA_IT_HT, ENABLE);
/* Enable the DMA Stream IRQ Channel */
dmaNvic.NVIC_IRQChannel = DMA1_Stream5_IRQn;
dmaNvic.NVIC_IRQChannelPreemptionPriority = 0;
dmaNvic.NVIC_IRQChannelSubPriority = 1;
dmaNvic.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&dmaNvic);
/* 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);
while (1)
{
DAC_DeInit();
/* Escalator Wave generator ------------------------------------------*/
DAC_Ch1_EscalatorConfig();
/* Sine Wave generator -----------------------------------------------*/
DAC_Ch2_SineWaveConfig();
}
}
void DMA1_Stream5_IRQHandler()
{
/* The DMA buffer is half empty. Fill 'er up! */
if(DMA_GetITStatus(DMA1_Stream5, DMA_IT_HTIF5) != RESET)
{
GPIO_SetBits(GPIOD, GPIO_Pin_12);
DMA_ClearITPendingBit(DMA1_Stream5, DMA_IT_HTIF5);
}
/* The DMA buffer's second half is empty. Top up! */
if(DMA_GetITStatus(DMA1_Stream5, DMA_IT_TCIF5) != RESET)
{
GPIO_SetBits(GPIOD, GPIO_Pin_13);
DMA_ClearITPendingBit(DMA1_Stream5, DMA_IT_TCIF5);
}
}
Thanks in Advance,
- Pinkesh
#dac-+-dma
