Memory-to-peripheral transfer in Embedded C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the memory-to-peripheral DMA transfer.

Embedded C

DMA_StartTransfer([1]);

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ADMA_Channel1

BtransferSize

CperipheralAddress

DbufferAddress

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the buffer address instead of the DMA channel.

Using the peripheral address as the argument.

Passing the transfer size instead of the channel.

The function DMA_StartTransfer requires the DMA channel identifier to start the transfer.

2fill in blank

medium

Complete the code to configure the DMA source address for memory-to-peripheral transfer.

Embedded C

DMA_SetSourceAddress([1], buffer);

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ADMA_Channel3

BDMA_Channel1

CDMA_Channel2

DDMA_Channel0

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different DMA channel than the one started.

Confusing source and destination addresses.

The source address must be set on the DMA channel used for the transfer, here DMA_Channel1.

3fill in blank

hard

Fix the error in setting the peripheral destination address for DMA transfer.

Embedded C

DMA_SetDestinationAddress([1], &PERIPHERAL_REG);

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ADMA_Channel1

BDMA_Channel3

CDMA_Channel2

DDMA_Channel0

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different DMA channel than the one configured for source.

Forgetting to use the address-of operator for the peripheral register.

The peripheral destination address must be set on the same DMA channel used for the transfer, which is DMA_Channel1.

4fill in blank

hard

Fill both blanks to configure the DMA transfer size and enable the transfer complete interrupt.

Embedded C

DMA_SetTransferSize([1], 256);
DMA_EnableInterrupt([2], TRANSFER_COMPLETE);

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ADMA_Channel1

BDMA_Channel2

CDMA_Channel3

DDMA_Channel0

Attempts:

3 left

💡 Hint

Common Mistakes

Using different DMA channels for size and interrupt configuration.

Confusing the interrupt type parameter.

Both functions must use the same DMA channel, DMA_Channel1, to configure the transfer size and enable the interrupt.

5fill in blank

hard

Fill all three blanks to complete the DMA memory-to-peripheral transfer setup.

Embedded C

DMA_Init([1], buffer, &PERIPHERAL_REG, [2]);
DMA_SetMode([3], MEMORY_TO_PERIPHERAL);

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ADMA_Channel1

B256

CDMA_Channel2

D128

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing DMA channels in different function calls.

Using incorrect transfer size values.

The DMA channel used is DMA_Channel1. The transfer size is 256 units. The mode is set on DMA_Channel1.