PE DMA Controller Issues

[davidzhou]

Hi,

I have K60F120M tower board.

I have issues with ISR event callback problem and want to remove the DMA controller and regenerate through PE. But after I removed DMA controller, I couldn't put it back as the same as before. I copied back the saved version, but The order of the channels in the Property page (attached) is not Chan 0 to Chan 3.

which creates a huge problem for me after PE generated code.

All channel numbers are reassigned into a different number, e.g. DMACH1 should be DMA1_STATIC_CHANNEL_1, but it reassigned to DMA1_STATIC_CHANNEL_3 even the Channel is chan 1 in the DMA1 controller as shown above.

The green line is new code generated by PE and the red line is removed/changed from previously generated code.

How to fix it?

Thank you,

David Zhou

[Alice_Yang]

Hello David,

Yes, i also think so with you , hope the next version of PE can fix this problem.

Sorry for the inconvenient to you .

BR

Alice

[Alice_Yang]

Hello David,

You can change the Channel settings for chan 3 to chan 1, then generate code to have a try.

If still can not work well , please tell me which IDE do you use , and which DMA component ,

please take a screenshot . Then you'd better how to reproduce your error , i will check on

my side .

Hope  it helps

Alice

[davidzhou]

Hi Alice,

Those parameters are not editable. They are fixed.

Is there any way to enable for editing?

Thank you,

David Zhou

[Alice_Yang]

Hi David,,

Send your project to me , or take a screenshot about which DMA component do you add.

BR

Alice

[davidzhou]

Hi Alice,

The screen dump of PE compoents: (This is before generating code)

After regenerating code:  ( - Red Code Lines are removed, and + Green Code Lines are added into the new code) (Screen Dump From GIT)

From DMA1_DevConst, Channel 0  is changed from (DMA_Channel_0)  (- Red Line ) to Channel 0 (DMA_Channel 2) ( Green Line), and so on.

In AD1_DMA0.c, before regenerating, the ChInit data has DMA1_STATIC_CHANNEL_0, but now it is DMA1_STATIC_CHANNEL_2

and  for other channels in DMACH1, DMACH2, etc.

Now I have to manually make changes, for example, if I want to enable interrupt for a DMA channel, which was disabled.

I have also zipped my bsp_ project. I cannot attach to this thread. May I send it to you by email?

Thank you,

David Zhou

[Alice_Yang]

Hello David,

About the DMA channel configuration , please configure the component of "DMAChannel_LDD":

Not on the DMAConroller.

Hope it helps

Have a great day,
Alice

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[davidzhou]

Hi Alice,

All DMA_Channels in DMALDD_Components are selected with correct channel numbers:

For example DMA_Channel3 is selected as DMA_Channel3:

But generated channel number changed from CHANNEL3 to CHANNEL1 for DMACH3

Thanks,

David Zhou

[Alice_Yang · Accepted solution]

Hello David,

This is just one logical channel, not the actual physical channel.

It meaning, this is just stand for the sequence of configure the DMA channel,

for example , we add three channel , at start , in turn to configuration : DMACH1 ,2, 3,then

from the DMACHx.c file , we can see they are in turn :

If then you change one , for example the component of DMACH2， we will see that ,

in the DMACH2.C file , the logical channel number become 2, not 1 , while in the DMACH3.C file ,

is "DMA1_STATIC_CHANNEL_1, ", the reason is we last configure the DMACH2, so the his logical nummber

is the last :

While it doesn't matter , the actual channel control is at the DMA1.C FILE :

they are one to one correspondence.

If you think this is confused , i recommend you if change one channles configure, you can from the first one ,then change all of them one by one , only need change one place on each channel, for the do not need changed

channel , you  change it to other , then change it back .

Hope it hleps

Have a great day,
Alice

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[davidzhou]

Hi Alice,

Thank you for your input.

I think if the program only uses the code generated by PE, this is OK and it will work. I know these numbers are logical. But if logical matches physical will be less confusion and less prone to error/bugs, because if the code is modified and using the macros, such as DMA_TCD1_CS,

    pDMA->SERQ = DMA_SERQ_SERQ(DMA_CHANNEL1);

then all these codes need to be modified again. The logical numbers are shuffled by PE.  I think I need to make such modifications for my customized code.

Thank you for your support.

David Zhou