DMA on ATXmega384C3 at 2.0.7.8.001

Duesentrieb72 · Joined: 17 Feb 2006 Posts: 44

Hello

I use DMA to receive 6Byte over USARTD0 on ATXmega384C3

With compiler version 2.0.7.7 this works well:

Config Dmach0 = Enabled , Burstlen = 1 , Chanrpt = Disabled , Tci = Hi , Eil = Lo , Singleshot = Enabled , _
Sar = Burst , Sam = Fixed , Dar = Transaction , Dam = Inc , Trigger = &H6B , Btc = 6 , Repeat = 0 , Sadr = Varptr(usartd0_data) , Dadr = Varptr(fmcu_rx_buffer(1))

With new version 2.0.7.8 it doesn't work proper.
I receive 6Byte, first 2Byte are ok, but the last 4Byte are allways Zero

After long try and error I changed Trigger = &H6B to Trigger = Usartd0 and everything works like before.

Does anyone has an idear for this?

Thanks a lot,
Duesentrieb72

[b][color=red](BASCOM-AVR version : 2.0.7.8 )[/b][/color]

albertsm · Joined: 09 Apr 2004 Posts: 5922 Location: Holland

that is really odd. because : when you use usartd0, &H6B will be used. And when you use a numeric value, the numeric value will be used. &H6B in this case.
I will check it to see if it really differs.

albertsm · Joined: 09 Apr 2004 Posts: 5922 Location: Holland

I checked. Maybe you changed more? Because in both cases, i get the same binary file.

Duesentrieb72 · Joined: 17 Feb 2006 Posts: 44

Hi Mark

Configuration für Bascom Compiler 2.0.7.7
Config Dmach0 = Enabled , Burstlen = 1 , Chanrpt = Disabled , Tci = Hi , Eil = Lo , Singleshot = Enabled , _
Sar = Burst , Sam = Fixed , Dar = Transaction , Dam = Inc , Trigger = &H6B , Btc = 6 , Repeat = 0 , Sadr = Varptr(usartd0_data) , Dadr = Varptr(fmcu_rx_buffer(1))

Configuration für Bascom Compiler 2.0.7.8
Config Dmach0 = Enabled , Burstlen = 1 , Chanrpt = Disabled , Ctr = Enabled , Singleshot = Enabled , Tci = Hi , Eil = Off , _
Sar = Burst , Sam = Fixed , Dar = Transaction , Dam = Inc , Trigger = Usartd0 , Btc = 6 , Repeat = 0 , Sadr = Varptr(usartd0_data) , Dadr = Varptr(fmcu_rx_buffer(1))

The rest of code is exact the same...

albertsm · Joined: 09 Apr 2004 Posts: 5922 Location: Holland

I had a look at 2077 vs 2078 but it creates the same code. Please make a small but complete sample that can be tested for 2077 that works, but does not work in 2078.
The dat file has changed in 2078 but it fixed the last entry of the interrupt table. It is not related to DMA.
In your sample i see that EIL=Lo but also OFF.

Duesentrieb72 · Joined: 17 Feb 2006 Posts: 44

>In your sample i see that EIL=Lo but also OFF
Yes, I tried a lot and I left this. I changed to "Lo" and it runs too.

Now, there comes a miracle...
I even changed just for fun back to complete old configuration and it runs too d'oh!

I'm sorry. I can't tell you, what happend.
I really changed to new compiler version only and it doesn't run.
I only changed in DAM configation, because I could see on scope correct UART signals.
I changed from "Trigger = &H6B" to "Trigger = Usartd0" and it run.
Now, I changed back and it runs too

So thanks for your kindly support,
Duesentrieb72