Hi,

I'm using EFR32MG13P and EFR32MG1P processors on several wireless products and have a concern regarding the PN9 stream mode. It seems unusual that a pure PN9 code would produce spectral lines as shown in the spectral plot in AN972 on page 16 (Figure 3.2 PN9 Modulated Signal...). These lines indicate periodic non-random weighting in the data sequence (longer strings of ones and zeroes than seem to appear in the sequence).  Is this really an artifact of the raw PN9 code sequence itself or is there something else going on that is introducing these spectral lines?

Thanks for your help,

Steve

Hi,

I am using EFR32FG14 in my PCB. In one PCB it is configured as transmitter and in the other it is configured as receiver. I debug using EFR  eval board. I would like to get the RSSI value in dBm for the receiver in the PCB. When i try to use the function x = getRssi , x(float) gives value -512. 

1. How to get the RSSI value in dBm?

Any help will be greatly appreciated

Regards,

Rekha

Hi,

According to the guide AN0971, we may select the BPSK as the modulation type. I tried to select several different chips, all of them don't have the  BPSK option in the dropdown box. Could you tell me which chip support BPSK modulation in 915MHZ band?

Thanks

Zhanglong

 

Hello,

So for my project, I've inherited code from a contractor whom I can no longer get in contact with. The device is the EFR32BG13P733F512GM48. For the sink project in flex-callbacks.c, the following code in emberAfMainInitCallback function:

  // Get the node ID from simEE in case it is already stored
  halCommonGetToken(&localChNum, TOKEN_CH_NUM);
  while (localChNum == 0xFF)
  {
      // Get user input for channel number via CLI
      emberAfTick ();
      // Update the channel number in simEE
      if (localChNum != 0xFF)
      {
          halCommonSetToken(TOKEN_CH_NUM, &localChNum);
          emberAfCorePrintln("User input channel number %d", localChNum);
      }
  }
  // Set channel number using token or user input
  radioChannel = localChNum;

keeps resulting in the following compile errors:

Description	Resource	Path	Location	Type
'TOKEN_CH_NUM_SIZE' undeclared (first use in this function); did you mean 'TOKEN_CH_NUM'?	flex-callbacks.c	/zk_sink_733	line 486	C/C++ Problem
'TOKEN_CH_NUM' undeclared (first use in this function); did you mean 'TOKEN_COUNT'?	flex-callbacks.c	/zk_sink_733	line 486	C/C++ Problem
make: *** [flex-callbacks.o] Error 1	zk_sink_733		 	C/C++ Problem
make: *** Waiting for unfinished jobs....	zk_sink_733		 	C/C++ Problem
Symbol 'TOKEN_CH_NUM_SIZE' could not be resolved	flex-callbacks.c	/zk_sink_733	line 486	Semantic Error
Symbol 'TOKEN_CH_NUM_SIZE' could not be resolved	flex-callbacks.c	/zk_sink_733	line 494	Semantic Error
Symbol 'TOKEN_CH_NUM' could not be resolved	flex-callbacks.c	/zk_sink_733	line 486	Semantic Error
Symbol 'TOKEN_CH_NUM' could not be resolved	flex-callbacks.c	/zk_sink_733	line 494	Semantic Error

Not sure if related, but in flex-token.h, the following lines seem to have been manually added

#define CREATOR_CH_NUM 0x0009
#ifdef DEFINETOKENS
DEFINE_BASIC_TOKEN(CH_NUM, unsigned char, 0xFF)
#endif

I'd be glad to look into more files if it helps give more information, but basically I want to:

1) Understand what the code snippet above in flex-callbacks.c is intended for
2) Be able to compile that snippet without errors

Hi,

I’m working on a project of group communication using Si4463. The RF configuration is as following:

(1) The packet length is variable: 64 Bytes or 128 Bytes. Field1(1Byte) indicates the packet length.

(2) TX/RX FIFOs are sharing with 128-byte size buffer.

(3) CRC is enabled and covers field1 and field2.

(4) The modulation type is 4GFSK， and the symbol rate is more than 300ksps.

 

The system works properly with two devices, and they can transmit or receive packets.

But when the 3rd device listens to the channel to join the group, the Si4463 of the 3rd device stops receiving randomly, and can’t transmit data either. At this time, the Si4463 stays in RX state and can process commands issued by CPU.

 

How to solve this problem? I look forward to your help.

 

Best Regards

Hi, guys!

I have some questions about Si4463 and need your help.

1. Which events occurred in Si4463 will trigger the “INVALID SYNC” or “INVALID PREAMBLE” interrupts? Can these events cause Si4463 to work incorrectly, even stop working?

2. How to response to these interrupts?

 

Best Regards!

Roger

Hi

We have to a Si1707-B-EVB (evaluation board) into the CD find Si473x-EVB documentation with 1.4 revision.

But in the daughtercard silkscreen appear 1.5 revision.

Someone have the 1.5 documentation?

Thanks in advance!

Hi,

     I'm trying to use the OQPSK modulation in 915MHz band. When I'm using the Radio Configurator of the Simplicity IDE to generate the OQPSK configuration files, there is no such option.

Then, I'm trying to use the Customer Settings to configure the OQPSK modulation manually. After I set the Modulation Type to OQPSK, other parameters are still GFSK related parameters. So I don't know where to set OQPSK related parameters. Could you tell me how to set OQPSK modulation and related parameters in 915MHz band?

Thanks

 

Hi,

I am having some issues with the duty cycle enforcement algorithm provided by the Si4010 API.

I'm currently testing with the test program attached below. The parameters I use are as follows:

• TxTime = 1.5 seconds.
• Duty Cycle = 10 % (E=0.1)
• wiIntegrand = (1.5 * 256) / 0.1 = 3840

I expected that the duty cycle enforcement code works like a simple leaky bucket. With a burst of roughly 240 packets(3600 sec ÷ (1.5 sec ÷ 0.1)) at the beginning.  And after that one packet very 15 seconds(1.5 sec / 0.1).

In practice the initial burst is much bigger: ~1025 invocations of vSleepTim_AddTxTimeToCounter(). After that bSleepTim_CheckDutyCycle() returns non-zero every 9.028 Seconds. With my TxTime of 1.5 Sec, this gives a duty cycle of 16.6 %. Clearly not what I set out for.

More problematic is that when the code does nothing when bSleepTim_CheckDutyCycle() returns false, eg. remove the else statement in my example code. Then bSleepTim_CheckDutyCycle() keeps returning 0 after the initial burst, and the program effectively gets stuck.

Obviously my question is what am I doing wrong? and how to change my code to get it working with my parameters.

Kind regards,

David

The test code I use:

void main()
{

	BYTE i;
	LWORD now;

	vSys_Setup( 1 );

	ser_init();
	vSleepTim_SetCount(0);


	ser_getc();
	ser_putu32(lSleepTim_GetOneHourValue());
	ser_putc('\r'); ser_putc('\n'); ser_putc('M'); ser_putc('\r'); ser_putc('\n');

	while ( 1 ) {
		now = lSleepTim_GetCount();

		if (bSleepTim_CheckDutyCycle()) {
			P0 ^= M_GPIO3;
			ser_putu32(now); ser_putc('\r'); ser_putc('\n');

			vSleepTim_AddTxTimeToCounter(3840);
#if 1
		} else {
			ser_putc('.');
#endif
		}
	}
}

 

Hello all,

Im working with a Mighty Gecko Board, I had loaded the RAILTEST example (Flex SDK 2.3.1) and I am triying to associate this board with a coordinator. The protocol exchange sequence should be:

1) MGecko -> Coordinator :  Association Req command

2) Coordinator -> MGecko: ACK

3) MGecko -> Coordinator :  DataReq command

4) Coordinator -> MGecko: ACK

5) Coordinator -> MGecko: Association Response

6) MGecko -> Coordinator :  ACK

 

My problem is that I cannot detect the Rx Package in step 5, so even with the AutoACK enable Mighty Gecko board doesn´t send the ACK. I am quite sure the coordinator send the Association Response because I can see it in the sniffer. 

Anyone knows if there is any configuration that I have to set to receive two consecutives RxPackage? 

I attach the sniffer capture, maybe it helps to see the timing.

Thanks in advance,

Raúl

 

 

 

 

Hello!

We start to develop an RF board with SI4468 chip. The board should be as small as possible, therefore we need to reduce the size for RF matching parts. Is the Murata  LFD21891MMF3D931 IPD device suitable for that chip? Would you recommend it? Or are there other similar devices, e.g. from Johanson Technology?

Thanks a lot for your help

Christian Popp

I want to use a RF switch in EFR32FG design. But I can't find any reference design using RF switches. So, how can I design a TX/RX matching? Which GPIO can I use to control TRX switch?

Hi, 
Does anyone know where in the generated code from WDS, can i change the TX transmission distance (range)? I'm using the EZradioPRO si4663. 

Hi, looking at the API for SI4464 revB1B, field 7 of INT_CTL_MODEM_ENABLE is listed as RSSI_LATCH_EN but in the WDS under the interrupts tab it is listed as an unused field.

So, can we configure RSSI_LATCH_EN or not for Si4464 B1 ?

Cheers.

I'm trying to read the state of GPIO0 on Si1084 but have failed to find information on how to do so.  I've managed to configure it as an input (+ pull-up) but need to read the state of the input.  There is reference to API command documentation on one of the forum questions (EZRadio-API-v1.1.3.zip) but I've not been able to find this document either.  Can anyone help?