你好，

我们需要设计一个工程，上电之后定时周期性发送数据包，有以下几个问题需要您帮忙回答：

1、设置vSys_Setup( 10 )，后面使用vSys_FirstPowerUp()------这个的400ms的延时是电池首次上电才有？wakeup之后再次进入是不是没有这400ms延时？

2、之前看到这样一句话“Please note also that vSys_FirstPowerUp function clears the sleeptimer and the HVRAM, so don't use it in your code in a buttonless application. You don't need to use it, if you never set the vSys_BandGapLdo to zero“，如果我的工程需要上电之后周期性唤醒程序（不靠按钮唤醒），那么是不是需要屏蔽掉vSys_FirstPowerUp（）函数。

3、针对上面第2点，如果不使用vSys_FirstPowerUp（）函数，是否会存在异常。且SYSGEN & M_POWER_1ST_TIME会在sleeptim定时器唤醒之后置0？

以上请帮忙

I do not like  default sync word. ”Defaults: 0x2d,0xd4,0x2d,0xd4“

My RF system need more than one sync word.

At present, the sync word are:

0x2dd40001

0x2dd40002

0x2dd40003

0x2dd40004

0x2dd40005

I think my sync word above is very casual.

I don't know what to pay attention to in designing sync word.

Thank you.

 

In using the Si4463 Long Packet TX and RX from the WDS, I am experiencing some more latency than expected. For instance, I am transmitting at 250ksps with 4GFSK modulation, which should be 500kbps. However, when using an o-scope to measure the time from the beginning of transmission (first write into TX FIFO) until the PKT SENT interrupt is handled reveals that the actual rate is ~440 kbps (calculated by dividing number of bits sent by the time it took). In this calculation I accounted for the 8 preamble bytes and 2 sync word bytes with each packet, but the discrepancy still remains between 440kbps to 500kbps.

My question is how much latency should be expected when using the FIFO interrupts to transmit long packets (in my case, 320 bytes)? Is this due to an error I potentially made, or is this latency within the range to be expected? I based my program directly off of the example given for the Long Packet Tx and Rx projects. The only modification I made was to the packet length property in the configuration file to incorporate 320 bytes.

Here is the example program I'm running, which is very similar to the Long TX project.

------------------------------------------------------------------------------------------------------------------

 

void start_tx(void)
{
    DEBUG_TGL = DEBUG_PIN;           // Debug pin
    
    /* Reset TX FIFO */
    si446x_fifo_info(SI446X_CMD_FIFO_INFO_ARG_FIFO_TX_BIT);        
                
    si446x_get_clr_int_status(0, 0, 0);
    
    si446x_write_tx_fifo(RADIO_MAX_PACKET_LENGTH, msg);
    
    payload_index_ptr += RADIO_MAX_PACKET_LENGTH;
    
    bytes_used += RADIO_MAX_PACKET_LENGTH;
    
    si446x_start_tx(0, 0x30, 0);
}

void continuous_tx(void)
{
    if(((PORT)->Group[2].OUT.reg & RF_NIRQ) == LOW)
    {
        si446x_get_clr_int_status(0,0,0);
        
        if(si446x_reply.GET_INT_STATUS.PH_PEND & SI446X_CMD_GET_INT_STATUS_REP_PH_PEND_PACKET_SENT_PEND_BIT)
        {
            REG_PORT_OUTTGL2 = LED;
            payload_index_ptr = &msg[0];
            bytes_used = 0;
            start_tx();
        }
        
        if(si446x_reply.GET_INT_STATUS.PH_PEND & SI446X_CMD_GET_INT_STATUS_REP_PH_PEND_TX_FIFO_ALMOST_EMPTY_PEND_BIT)
        {
            remaining_bytes = packet_len - bytes_used;
            
            if(remaining_bytes > RADIO_TX_ALMOST_EMPTY_THRESHOLD)
            {
                si446x_write_tx_fifo(RADIO_TX_ALMOST_EMPTY_THRESHOLD, payload_index_ptr);
                payload_index_ptr += RADIO_TX_ALMOST_EMPTY_THRESHOLD;
                bytes_used += RADIO_TX_ALMOST_EMPTY_THRESHOLD;
            }
            else
            {
                si446x_write_tx_fifo(remaining_bytes, payload_index_ptr);
                payload_index_ptr += remaining_bytes;
                bytes_used += remaining_bytes;
            }
        }
    }
}

------------------------------------------------------------------------------------------------------------------

Thanks for your time.

Hello, I need your professional advice. In the standard simple rail with hal template, I change FSK2 to MSK and the project stops accepting the package. In an971 I did not find a detailed description of the features of working with MSK. If you are concerned about what could be the problem, let me know. Or maybe you have a more detailed document than an971. Thank you in advance.

Hello

I want to read a package that comes from other device, then extract the value I want. What is the api that can do it, and where is it in the project? we use the efr32fg13 chip

 

Thank you !

I am transmitting data  from EFR32MG12P433F1024GM48  at two different frequencies and it has to be received by my company radio board, and it is working in one frequency but not the other.

any idea why? I have attached the waveform analyzer- in that first image is of EFR32, second image is of my company radio board, there is a mismatch while transmitting and receiving between both for the the mentioned frequency(in diagram), but for the other frequency it is working fine, I am able to transmit and receive 

.

2

 

 

Question no 2:

and can any one tell me what's the purpose of the following slip time and transaction time in schelduer?

 

Hi,

SI4455 is set like that on emitter and receiver (two SI4455):

 

Changing channel on both devices  works fine, and If I set emitter on channel 1 and receiver on anything else except 4, it receives nothing.

Indeed, if receiver is set on channel 4, it keeps receiving some frames from time to time. I put the emitter far away from receiver, but no change.

Have you any idea ?

Best regards.

 

 

 

Hello

I have to write a proprietary IEEE 802.15.4 application for an EFR32MG12. For performance tests I send approximately 60 packets (inter-PAN broadcast) per second using RAIL_StartCcaCsmaTx. But after some random time somehow the RAIL library gets stuck internally in a function named RAILINT_<some hexadecimal value>. If I replace function RAIL_StartCcaCsmaTx with RAIL_StartTx, everything works fine forever, but of course no CSMA is done.

The problem seems to be an endless loop in RAILINT_f5d04763af9c9c69bca278c1fb1e9fea, which calls RAILINT_e6774cc41ac68f20480ff41750a4ec92 forever.

I'm using Flex SDK 2.6.3.

Does this ring a bell somewhere? What I'm doing wrong? How to debug such kind of problems, with having the RAIL library only as a binary?

My RAIL IEEE 802154  configuration is:

static const RAIL_IEEE802154_Config_t sRailIeee802154Config = {
    .addresses = NULL,
    .ackConfig =
        {
            .enable     = true,
            .ackTimeout = 864,
            .rxTransitions =
                {
                    .success = RAIL_RF_STATE_RX,
                    .error   = RAIL_RF_STATE_RX,
                },
            .txTransitions =
                {
                    .success = RAIL_RF_STATE_RX,
                    .error   = RAIL_RF_STATE_RX,
                },
        },
    .timings =
        {
            .idleToRx = 100,
            .idleToTx = 100,
            .rxToTx = 192,    // 12 symbols * 16 us/symbol = 192 us
            .txToRx = 192,    // 12 symbols * 16 us/symbol = 192 us
            .rxSearchTimeout     = 0,
            .txToRxSearchTimeout = 0,
        },
    .framesMask       = RAIL_IEEE802154_ACCEPT_STANDARD_FRAMES,
    .promiscuousMode  = false,
    .isPanCoordinator = false,
};

The initialization of RAIL is done like this:

  memset(&railCfg,0,sizeof(railCfg));
  railCfg.eventsCallback = RAIL_eventsCallback;
  railCfg.protocol = 0; // use 802.15.4
  railCfg.scheduler = 0; // no scheduler, since we don't do multi-protocol

  railHandle = RAIL_Init(&railCfg, 0);
  if (railHandle == NULL) {
    return 0;
  }

  RAIL_EnablePaCal(true);
  RAIL_ConfigCal(railHandle, RAIL_CAL_ALL);

  if (RAIL_IEEE802154_Init(railHandle, &sRailIeee802154Config) != RAIL_STATUS_NO_ERROR) {
    return 0;
  } else {
    if (RAIL_IEEE802154_Config2p4GHzRadio(railHandle) != RAIL_STATUS_NO_ERROR) {
      return 0;
    }
  }

  CMU_ClockEnable(cmuClock_PRS, true);

  for (unsigned int x = 0; x<(sizeof(addressFilters.panId)/sizeof(addressFilters.panId[0])); x++) {
    addressFilters.panId[x] = 0xffff;
    addressFilters.shortAddr[x] = 0xffff;
    memset(addressFilters.longAddr[x],0xff,sizeof(addressFilters.longAddr[x]));
  }
  if (RAIL_IEEE802154_SetAddresses(railHandle,&addressFilters) != RAIL_STATUS_NO_ERROR) {
    return 0;
  }

  // Configure RAIL callbacks

  RAIL_ConfigEvents(railHandle,
                    RAIL_EVENTS_ALL,
                    (RAIL_EVENTS_RX_COMPLETION 
                     | RAIL_EVENT_TX_PACKET_SENT
                     | RAIL_EVENT_TX_UNDERFLOW 
                     | RAIL_EVENT_CAL_NEEDED));

  // Initialize the RAIL Tx power curves for all PAs on this chip
  RAIL_TxPowerCurvesConfig_t txPowerCurvesConfig = {
    curves24Hp,
    curvesSg,
    curves24Lp,
    piecewiseSegments
  };
  if (RAIL_InitTxPowerCurves(&txPowerCurvesConfig) != RAIL_STATUS_NO_ERROR) {
    // Could not initialize transmit power curves so something is configured
    // wrong. Please fix and rebuild.
    return 0;
  }
  // Initialize the PA now that the HFXO is up and the timing is correct
  if (RAIL_ConfigTxPower(railHandle, &txPowerConfig) != RAIL_STATUS_NO_ERROR) {
    // Error: The PA could not be initialized due to an improper configuration.
    // Please ensure your configuration is valid for the selected part.
    return 0;
  }

The transmission is initiated with this:

  RAIL_TxOptions_t  txOptions  = RAIL_TX_OPTIONS_DEFAULT;
  RAIL_CsmaConfig_t csmaConfig = RAIL_CSMA_CONFIG_802_15_4_2003_2p4_GHz_OQPSK_CSMA;
  status = RAIL_StartCcaCsmaTx(railHandle, channel, txOptions, &csmaConfig, NULL);

 

when I generate proprietary configs for say 40 channel groups, following thing generates, when I create another protocol with 20 channel groups, it creates the same thing under different name. I am trying to understand here,  but couldn't. hope someone could shed some light here

Hi I am unabble to interface Si4362 radio to PIC32MZ harmony configuration.

Can anyone help me correct sequence of radio initialisation and SPI commnand ?

I am getting nothing out of the Radio.

Thanks

 

 

Dear forum users, I studied https://www.silabs.com/community/wireless/proprietary/knowledge-base.entry.html/2018/07/11/rail_tutorial_speci-iQe3. Projects based on simple rail with hal. Activating .rxSource = RX_DEMOD_DATA does not cause interrupt generation! How to determine when the decoding of a data byte is complete ???

Hi ... how to connect SI4362 with PIC16f877A via SPI? if there are steps that need to be done? Best Regards Satria

Hello there,

Which dev kit should i purchase to get started with the Si4432?

Any references to getting started projects with such a kit and chip would be very much appreciated. 

Thank you,

Hello,

using the GET_REV Command, the first two bytes of the Product ID i receive are always 0 0 ( with multiple 4012s), the next two bytes got different values. Can this be possible or might there be an error?

Best regards,

Philipp