MRFI on CC1110 - MDK (RE:IRQ_Done in TX with CCA)

Timmy

Hi everyone

At the moment I'm doing my final year project witch includes a CC1111 USB dongle and CC1110 ED. Both of them implement MRFI protocol used in SWRU222(CC USB software examples).

On the side of the dongle everything works fine, however, the CC1110 gets stuck waiting for transmission to complete [never exits while (!(RFIF & IRQ_DONE)); ] inside MRFI_Transmit function with CCA.

I thought it could be an underflow or CCA, but the MARC_STATE shows that chip is in TX and the channel is clear.

Any idea why?

And one more question, what determines the size of the frame in side the packet? The CC1111 and CC1110 have identical MRFI settings but yet the frame size on CC1111 is 62 and on CC1110 it's 29.

Regards

Timmy.

over 15 years ago

0 Timmy over 15 years ago

Prodigy 70 points

Found where the frame size is defined, but still no clue about unfinished TX.

0 Kjetil over 15 years ago in reply to Timmy

TI__Mastermind 21125 points

Hi Timmy,

Hmm..might be that the DMA remains un-triggered for some reason. Would have looked into the state of DMA channel 0 (defined by MRFI_DMA_CHAN) and see if the solution can be found there.

Regards
Kjetil

0 Timmy over 15 years ago in reply to Kjetil

Prodigy 70 points

I found the reason why it doesn't work.

Since DMA can only operate in XDATA space, it could not access the buffer in IDATA. Therefore I had to change the memory model to Large and now it works.

Thank you for you answer !!!

Regards

Tim.

Sub-1 GHz

Sub-1 GHz forum

MRFI on CC1110 - MDK (RE:IRQ_Done in TX with CCA)