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Library

STM DMA Library

Rating:

15

Author: Richard Lowe

Last Updated: 2016-02-25

Package Version: 1.0.0.0

Category: Storage

Downloaded: 1817 times

Followed by: 3 users

License: MIT license  

This is the first of DMA functions that will be available for the ST line of ARM microcontrollers. The idea was born from a forum post. The idea worked so well I made it into a convenient MikroC library.

So far.... memory to memory transfers is what is functional

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DOWNLOAD LINK RELATED COMPILER CONTAINS
mikroC PRO for ARM
  • lib
  • src
  • exa
  • hlp
  • hex
  • sch
  • pcb
  • doc

Library Blog

This library has proven to be useful to me so I thought I’d share it.

Born from a forum post: Memory to memory transfer I made it into a flexible library that I include in my projects.

At the moment it only includes memory to memory functionality but I am working on others.

Example:

Step 1.
You must initialize your library by first providing a channel and priority level

//Initialize memory to memory copy functions based on channel and priority
dma_mem_init( CHANNEL_1, DMA_HGH_PRIORITY );

Step 2.
Start the copy process by providing destination, source, and number of bytes to transfer (currently limited to 65k

dma_mem_cpy( dest, source, 2048 );

Step 3. (optional)
You can also check to see if your transfer is complete or if the controller is ready for another round with this:

Is_dma_mem_finished();


Requirements:
You will need to provide the ISR for the selected DMA stream and within it call:

dma_mem_complete();

For example: If you chose to use CHANNEL_1 on you initialization, you would need to provide the ISR for Stream1:

void transerDone_ISR() iv IVT_INT_DMA2_Stream1 ics ICS_AUTO {
dma_mem_complete();
}

In addition to that, you will need the Boolean library addition which can be found on libstock here: Boolean

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