CC1120: Transmit packet lengths up to 255 bytes

Hi, Can I get a response to my question? 

Hi,

Sorry for delayed response. Did you try the suggestion in section 8.1.1 of users guide?

http://www.ti.com/lit/ug/swru295e/swru295e.pdf

Regards,

Thank you for the response. No, I actually did not try the suggestion in 8.1.1. Thanks for the suggestion.

However, what is the sequence in the MCU code to follow on the transmitter and on the receiver side to transmit 256 bytes or less?

Actual example code or even pseudo code, will help!

Hi,

I am not sure I follow your question regarding "sequence in the MCU". Isn't  this something the radio examples already implement?

For packets longer than FIFO you can also employ an approach suggested in the following thread.

Regards,

Just to clarify, the radio example I've looked at is the "Infinite Packet Length Mode" example, which requires 3 interrupt pins. As I only have only a single interrupt pin (I'm using it for PKT_SYNC_RXTX) and our device can both receive and transmit,  I wanted to know the steps in our code (some pseudo code) to do this with just one interrupt. 

Thank you for the the thread. I have read through it, and I see you still need two interrupts, PKT_SYNC_RXTX  together with RXFIFO_THR interrupt on the receiver side. How can I get around this still using 1 interrupt pin on the MCU?

Hi,

Any update on my last question?

regards

Sudesh

If you need to transmit packet above the FIFO size but only have one interrupt pin available, you can poll the NUM_TXBYTES register over SPI. This register will tell you how many bytes are in the TX FIFO, and then you can refill the FIFO until you have written the complete packet.

BR

Siri

Ok, thanks Siri.

So, on transmit, if I'm transmitting say 200 bytes for the complete packet, and have append CRC enabled and the first byte is the packet length. So, is the CRC is still calculated on the full packet?

And what about the receiver side? What do I do there with just a single interrupt?