Can't enable DMA1_Stream7 in STM32f4 Discovery Kit

[tlta]

Posted on December 23, 2014 at 22:39

I'm trying to transfer data from DMA to SPI3,but my code can't enable DMA1_Stream7! Someone please hepl me!!! Thanks you very much!

This is my code:

#define CODEC_I2S SPI3
#define I2S_STANDARD I2S_Standard_Phillips 
#define DMA_STREAM DMA1_Stream7
#define DMA_CHANNEL DMA_Channel_0
#define DMA_STREAM_CLOCK RCC_AHB1Periph_DMA1
#define DMA_STREAM_IRQ DMA1_Stream7_IRQn
#define DMA_IT_TCIF DMA_IT_TCIF7
#define DAM_STREAM_IRQHANDLER DMA1_Stream7_IRQHandler
void
DMA_Config(
void
)
{
I2S_InitTypeDef I2S_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
__IO uint32_t Timeout = TIMEOUT_MAX;
/* Enable DMA clock */
RCC_AHB1PeriphClockCmd(DMA_STREAM_CLOCK, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
SPI_I2S_DeInit(CODEC_I2S);
I2S_InitStructure.I2S_AudioFreq = (uint32_t)48000;
I2S_InitStructure.I2S_Standard = I2S_STANDARD;
I2S_InitStructure.I2S_DataFormat = I2S_DataFormat_16b;
I2S_InitStructure.I2S_CPOL = I2S_CPOL_Low;
I2S_InitStructure.I2S_Mode = I2S_Mode_MasterTx;
I2S_InitStructure.I2S_MCLKOutput = I2S_MCLKOutput_Enable;
I2S_Init(CODEC_I2S, &I2S_InitStructure);
RCC_PLLI2SCmd(ENABLE);
I2S_Cmd(CODEC_I2S, ENABLE);
/* Reset DMA Stream registers (for debug purpose) */
DMA_DeInit(DMA_STREAM);
/* Check if the DMA Stream is disabled before enabling it.
Note that this step is useful when the same Stream is used multiple times:
enabled, then disabled then re-enabled... In this case, the DMA Stream disable
will be effective only at the end of the ongoing data transfer and it will
not be possible to re-configure it before making sure that the Enable bit
has been cleared by hardware. If the Stream is used only once, this step might
be bypassed. */
while
(DMA_GetCmdStatus(DMA_STREAM) != DISABLE)
{
}
/* Configure DMA Stream */
DMA_InitStructure.DMA_Channel = DMA_CHANNEL; 
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(SPI3->DR);
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)SRC_Const_Buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_InitStructure.DMA_BufferSize = (uint32_t)BUFFER_SIZE;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
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_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; 
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA_STREAM, &DMA_InitStructure);
/* Enable DMA Stream Transfer Complete interrupt */
DMA_ITConfig(DMA_STREAM, DMA_IT_TC, ENABLE);
/* DMA Stream enable */
DMA_Cmd(DMA_STREAM, ENABLE);
/* Check if the DMA Stream has been effectively enabled.
The DMA Stream Enable bit is cleared immediately by hardware if there is an
error in the configuration parameters and the transfer is no started (ie. when
wrong FIFO threshold is configured ...) */
Timeout = TIMEOUT_MAX;
while
((DMA_GetCmdStatus(DMA_STREAM) != ENABLE) && (Timeout-- > 0))
{
}
/* Check if a timeout condition occurred */
if
(Timeout == -1)
{
/* Manage the error: to simplify the code enter an infinite loop */
while
(1)
{
}
}
/* Enable the DMA Stream IRQ Channel */
NVIC_InitStructure.NVIC_IRQChannel = DMA_STREAM_IRQ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure); 
}
void
DAM_STREAM_IRQHANDLER(
void
)
{
/* Test on DMA Stream Transfer Complete interrupt */
if
(DMA_GetITStatus(DMA_STREAM, DMA_IT_TCIF))
{
/* Clear DMA Stream Transfer Complete interrupt pending bit */
DMA_ClearITPendingBit(DMA_STREAM, DMA_IT_TCIF); 
/* Turn LED5 on: End of Transfer */
STM_EVAL_LEDOn(LED5);
}
}

#dac-stm32f4-discovery #dma-i2s

[Tesla DeLorean]

Posted on December 24, 2014 at 03:50

  /* Enable the I2S DMA request */

  SPI_I2S_DMACmd(CODEC_I2S, SPI_I2S_DMAReq_Tx, ENABLE);

[tlta]

Posted on December 24, 2014 at 09:46

Mr Clive1! Thank you for helping me! It's woking!!!