CC1110-CC1111: The issue of switching between receive and transmit modes

Cherry Zhou

Mastermind 22235 points

Part Number: CC1110-CC1111

Hi team,

Here's an issue from the customer may need your help:

From receive to transmit:

SIDLE();
SCAL();
while (MARCSTATE != MARCSTATE_IDLE);
STX();

From transmit to receive:

SIDLE();
SCAL();
while (MARCSTATE != MARCSTATE_IDLE);
SRX();

And please see the following:

#define SCAL() do{RFST = 0x01;}while(0)
#define SRX() do{RFST = 0x02;}while(0)
#define STX() do{RFST = 0x03;}while(0)
#define SIDLE() do{RFST = 0x04;}while(0)

MCSM0 = 0x18;

Issue: It is not able to receive after one transmission, the customer are not sure whether it is related to mode switching. Could you help check this case? Thanks.

Best Regards,

Cherry

over 2 years ago

0 TER over 2 years ago

TI__Guru**** 317180 points

In this thread: https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz-group/sub-1-ghz/f/sub-1-ghz-forum/387222/cc1110-rx-tx-transition you will find examples on how to use the chip with and without DMA.

For me the strobe usage and definition in your post looks off compared to the example.

0 Cherry Zhou over 2 years ago in reply to TER

TI__Mastermind 22235 points

Hi,

Thanks for your help.

TER said:
In this thread: https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz-group/sub-1-ghz/f/sub-1-ghz-forum/387222/cc1110-rx-tx-transition you will find examples on how to use the chip with and without DMA.

The customer has checked this thread, and it seems only mentioned how to use the chip with and without DMA(they are using DMA transmit and receive currently), but not mentioned how to switch between transmit and receive these 2 modes.

Thanks and regards,

Cherry

0 TER over 2 years ago in reply to Cherry Zhou

TI__Guru**** 317180 points

IF they manage to set the device in either RX or TX they should also be able to switch from RX to TX or the other way around since it's the same strobes required. The examples show how to set the radio in RX or TX and generally how to use the radio.

To take one step back: From the initial mail it sounds like they have code running on the RX and TX side. FOr debug they should use SmartRF Studio on one side of the link. First, run TX on the DUT using code and receive using Studio. Get this to work. Then run RX on the DUT with code and TX with Studio. Does this work as expected? Then both RX and TX should be running code (no RX/ TX state shifts). When this works as expected, look at the shift from RX to TX and the other way around.

0 Cherry Zhou over 2 years ago in reply to TER

TI__Mastermind 22235 points

Hi,

TER said:
The examples show how to set the radio in RX or TX and generally how to use the radio.

Dose this example indicate the thread you given above: https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz-group/sub-1-ghz/f/sub-1-ghz-forum/387222/cc1110-rx-tx-transition

Or something else?

Thanks and regards,

Cherry

0 TER over 2 years ago in reply to Cherry Zhou

TI__Guru**** 317180 points

I'm referring to the same E2E thread, yes.

Sub-1 GHz

Sub-1 GHz forum

CC1110-CC1111: The issue of switching between receive and transmit modes