Hi.,
I used a two HC11 module. I was tried to send a data between channel 1 and channel  2, these couldn't  send/ receive between them. But i send a data between same channel these were send successfully  between them.

For example, I have a Single master with multiple slave. whether these should be in same channel is mandatory or not ?

Explain why these could not send/ receive in different channel?

 

Hi, I am developing a streaming audio application on the Thunderboard BG22 using direct mode operation. I am using the simple_rail_with_hal example as a template. The problem I am having is RAIL_StartTx(railHandle, 0, RAIL_TX_OPTIONS_DEFAULT, NULL) and RAIL_StartRx(railHandle, 0, NULL) are not returning. The disassembly in the debugger shows that each of the functions have a branch instruction pointing to itself resulting in an infinite loop. I have tried running RAIL_StartTx() and RAIL_StartRx() after configuring direct mode with RAIL_EnableDirectMode(railHandle, true) or when I configure the radio for packet mode as described in the RAIL Tutorial by andrasbiro. Does anyone have any ideas why this is happening? I am new to the EFR32 and I appreciate any help and suggestions.

Thank you,
Stefan

Hello, I'm using SI4010 with the sample code keyfob_demo_2.

I'm having difficulty using the GPIO9, the SI4010 does not transmit when I press the GPIO9 button, what do I need to modify in the code for it to work?

thank you

Hi, I am trying to demodulate the chipped symbols from the Gecko radio transmitter with a Vector spectrum  analyzer. The modulation is OQPSK, 1.2 kbps with DSSS is enabled. It looks like after some tweaking VSA is able to lock onto carrier however, since I don't know what the DSSS is doing to the bits, I cant search for a bit pattern. XORing each bit repeatedly 32 times with the chip gives me 32 times the bitrate but the spread factor 8 so there must be some additional stuff I have to do to get the exact bits coming out of the transmitter, is there a formula?

Table 3.7 of https://www.silabs.com/documents/public/application-notes/an971-efr32-radio-configurator-guide.pdf somewhat touches this but not clear to me.

Thanks,

Ratin 

Hi All!
I'm testing few different custom boards based on EFR32FG1V131F128GM32.
Frequency band: 868 MHz. I use R&S FPC1500 spectrum analyzer and "RAILTEST" application for RF parameters checking.
Using DC/DC for RFVDD and PAVDD all works well, RF power grows monotonically with growth of power level. 
But by direct powering from VDD (3300 mV, DC/DC disabled) the following is observed:
I type "sweeptxpower" command, change power step-by-step and see monotonical growth of power until power level reaches 80.

1st number - power level, 2nd - measured RF power
1    -23.1
2    -17.0
3    -13.5
4    -10.8
5    -8.9
6    -7.3
7    -6.1
8    -5.0
9    -4
...
77    14.16
78    14.24
79    14.33
80    14.41
Further increasing of power level - RF power drops down and then sharply grows back:
81    10.67
82    10.82
83    10.99
84    11.14
85    11.3
86    4.37
87    4.72
88    5.05
89    5.37
90    5.7
91    15.11
92    15.01
93    15.06
94    15.09
95    15.14
96    15.09
97    15.23
And then grows monotonically again, maximum power is achieved at level about 140:
139    16.35
140    16.37
141    16.38
142    16.4
2nd board:
80    14.99
81    3.92
82    4.39
83    4.79
84    5.19
85    5.56
86    5.91
87    6.25
88    6.58
89    6.89
90    7.18
91    15.45
3rd board:
80    14.49
81    10.67
82    10.84
83    11.01
84    11.17
85    11.32
86    11.46
87    11.61
88    11.74
89    11.88
90    12.01
91    15.26

The spectrum of RF signal is good at all power levels.

Attached file contains all measured data from one board.

Is there some physical reason for such behavior?.. 

Sincerelly,

Vladimir

hi,
In our current project, we are using si4063 as a transmitter and si4362 as a receiver in one set of devices. Each set of devices has different addresses and the same channel and frequency.each transmitter in each device transmit a packet every 10seconds and some sets of devices are working in nearby areas so the problem is transmitted packet colliding and packet missing .how can I rectify this problem any solution? please.

Hi there, 

Is there anyone who tested, or any test data available for the best possible distance which can be achieved to wake up an EFR32x22 Device from an another EFR32x22 device? 

Is there any way to wake up one of them from another when both are around 10 meters away from each other in a room (with probably a wall between them).

Hello,I have a problem : when my si4467 turn to TX mode and send a packet data , it will consume 35mA current not the 24mA(the max in datasheet at +13 dBm) as shown in the following figure. So what should I do to reduce the power consuption in TX mode?

PS: I have tested the CPU 's power consuption of my board in the TX mode,only 3mA. So I deduce the main power consuption produced form si4467.

Thanks!

 

 

 

Hi,

I'm try using patch for si4463 (in Si1062). In examples there is following code in vRadio_Init(void) function:

#ifdef RADIO_CONFIGURATION_USE_PATCH
  while(SI446X_SUCCESS != si446x_apply_patch())
  {
    /* Error hook */
#if !(defined SILABS_PLATFORM_WMB912)
    LED4 = !LED4;
#else
    vCio_ToggleLed(eHmi_Led4_c);
#endif
    for (wDelay = 0x7FFF; wDelay--; ) ;

    /* Power Up the radio chip */
    vRadio_PowerUp();

  }
#endif 

But where is source code of si446x_apply_patch() function?

Also I have problem with CTS during continuous transfer after 5 seconds. In radio_comm_GetResp() function CTS stay zero over RADIO_CTS_TIMEOUT (10000).

I'm using  an SI4463 B1 and WDS Direct RX example.  Configuration parameters as copied below. Most important is RXBW: 1100Hz and no AFC

When I monitor the RSSI and sweep a signal past the center frequency I can observe the RX BW. For a BW of 850kHz the measured BW is correct but when I set the BW to 1100Hz I measure an RX BW of about 7kHz. How can I get 1100Hz? What WDS example should I use as starting point?

// INPUT DATA
/*
// Crys_freq(Hz): 26000000    Crys_tol(ppm): 20    IF_mode: 2    High_perf_Ch_Fil: 1    OSRtune: 0    Ch_Fil_Bw_AFC: 0    ANT_DIV: 0    PM_pattern: 15    
// MOD_type: 1    Rsymb(sps): 100    Fdev(Hz): 1000    RXBW(Hz): 1100    Manchester: 0    AFC_en: 0    Rsymb_error: 0.0    Chip-Version: 2    
// RF Freq.(MHz): 433    API_TC: 29    fhst: 10000    inputBW: 0    BERT: 0    RAW_dout: 0    D_source: 1    Hi_pfm_div: 1    
// 
// # RX IF frequency is  -406250 Hz
// # WB filter 15 (BW =   7.49 kHz);  NB-filter 15 (BW = 7.49 kHz)
// 
// Modulation index: 20

 

您好！我使用的是V4版本的simplicity Studio，硬件是4257A的底板+EFR3214G233的核心板，有以下2个问题想请教下：

1、我想看下关于EFR32的外设的DEMO，例如串口，定时器，LED，GPIO等，应该如何在launch中添加呢？

2、我添加了wireless&RF的Proprietary条目后，部分DEMO可以编译通过（例如simple_trx），部分不能编译通过（例如sensor），编译不通过的DEMO提示某些函数或者参数没有定义，要么就是某些头文件找不到，我怀疑是我少下载了一部分文件，但是又不确定是哪些？launcher时，Xpress Interface、Sensors、32-bit这些下载目录分别是对应哪些硬件外设的？

Hello,from the manual shown bellow and the I2c API where is the option for clock streching where the masters clock gets shut down by the slave?

Thanks

 

https://docs.silabs.com/mcu/5.4/efr32fg14/group-I2C

https://www.silabs.com/documents/public/application-notes/AN0011.pdf

I'm using an SI4432 in either direct RX or direct TX setup.

In TX I can use the offset tuning to change the TX frequency within the PLL loop without interrupting the output.

According to the application note "Si4430/31/32 ISM TRANSCEIVER" when I disable the AFC (enafc = 0) I should be able to use the frequency offset register to fine tune the RX frequency but this does not work (e.g. no change whatsoever in the RX frequency when I change the value of the offset registers (0x73, 0x74) 

What else (apart from enafc=0) do I need to do to enable offset tuning in RX mode?

I want to tune without leaving  the RX mode so I can scan very fast a small frequency range. Is there another way to do this?