Quantcast
Channel: Forums - Recent Threads
Viewing all 262198 articles
Browse latest View live
↧

RTOS/CC1310: Tx power issue in customized CC1310

March 15, 2019, 4:57 am
$
0
0

Part Number:CC1310

Tool/software: TI-RTOS

Hello,

         We are using customized CC1310(Rev.2.1) and We are transmitting the data in 868MHz using the rfPacketTx example. We are providing Tx power values in smartrf_settings.c by using smartRFStudio. We observed the values in spectrum analyzer like below.

       We are giving input for 14dBm and we are getting in spectrum analyzer is 10.46 like this We provide all values below

          when CCFG_FORCE_VDDR_HH------------>0 then       

                        14 dBm---------->10.46 dBm

                        12.5 dBm--------->10.42 dBm

                        12 dBm------------>10.16 dBm

                        11 dBm------------>9.89 dBm

                        10 dBm ----------->9.68 dBm

                         9 dBm -------------> 9.34 dBm

            when CCFG_FORCE_VDDR_HH------------>1 then

                        14 dBm -------------->11.52 dBm

                        12.5 dBm ------------>11.5 dBm

                        12 dBm ---------------> 11.25 dBm

                        11 dBm ---------------> 10.92 dBm

                        10 dBm ----------------> 10.60 dBm

                         9 dBm ------------------> 10.2 dBm

     Some times we getting tx power less of what we gave and some times we are getting more than the input of what we gave. Can you please tell us why? and when should we use CCFG_FORCE_VDDR_HH = 1?

Regards,

Harsha

 

↧
Search

WEBENCH® Tools/TPS92515HV: Webench issue regarding PWM pin

March 15, 2019, 4:38 am
$
0
0

Part Number:TPS92515HV

Tool/software: WEBENCH® Design Tools

Hello,

TPS92515 data sheet states Absolute Macimum Rating for PWM pin -0.3 to 5.5 V. Webench produces a design that conflicts with this requirement as shown in picture below.

At 48.5 V in and Ruvlo1 365 K and Ruvlo2 87 K, the voltage on the pin is approx. 9.3 V. With the given value on Ruvlo1 and Ruvlo2, was Ruvlo1 supposed to be connected to VCC instead?

BR

Håkan

↧
↧

CCS/TMS320F28335: TMSF28335

March 15, 2019, 4:51 am
$
0
0

Part Number:TMS320F28335

Tool/software: Code Composer Studio

Hello

I am trying to interface F28335 DSP(Spectrum Digital eZdsp28xx USB) with Matlab/Simulink for onboard LED glowing. The build process is completing successfully. However, I am getting the below error highlighted in bold.

Build process completed successfully

Verbose mode is enabled for External mode. You can disable Verbose in Model Configuration Parameters > Hardware Implementation > Target Hardware Resources > External mode.
action: EXT_CONNECT
Error occurred while executing External Mode MEX-file 'ext_serial_win32_comm':
Failed to connect to the target. A time-out occurred while waiting for the connection response from the target. Possible reasons for the time-out:
a) The target is not switched on.
b) The target is not connected to your host machine.
c) The application for the model is not running on the target. You might have clicked the Stop button. If the Run button is not dimmed, click it. Otherwise, click the Build button, which downloads and runs your application on the target.
Component: Simulink | Category: Model error
Simulation 1 Clear
04:22 PM Elapsed: 0.71 sec
Unable to connect to the 'TI Delfino F2833x' target for 'ledglowing'.
Component: Simulink | Category: Model error

 

After all possible troubleshooting, my DSP is not communicating with the host. In the external mode of the run, I need the COM port number. However, connecting the DSP to the host through a USB, it is showing as the eZdsp debugging tool. To get the COM port number, I have connected SCI-A with the host through a DB9 connector. However, still, it is not connecting with the board. While trying for connection through CCS6 also, it is not working. Please help me out. Waiting for your response.

↧

LM74700-Q1: Spice model does not function in LTSpice

March 15, 2019, 4:58 am
$
0
0

Part Number:LM74700-Q1

Hi, 

I'm simulating ISO7637-2, ISO16750-2 pulses and reverse battery protection for a new design. All my simulations are made in LTSpice. Although I already found a lot of useable models for LTSpice among your resources and therefor am using a lot of TI components in my design, the model of the LM74700-Q1 doesn't work. It seems that LTSpice can't handle the encrypted format used. I've also did some simulations on the LM5050 where the model is unencrypted and this worked without any problems.

Can I get an unencrypted version of the spice model of the LM74700-Q1?

Thanks

↧

CCS/TMS570LC4357: Invalid code from halcogen 04.07.01

March 15, 2019, 5:03 am
$
0
0

Part Number:TMS570LC4357

Tool/software: Code Composer Studio

I have inherited an existing project that was generated a while ago and I am trying to recreate it from scratch so I can understand the halcogen settings correctly.

(Project generated for TMS570LC4357ZWT_FREERTOS)

When halcogen generates code for this project, I get code such as (in HL_pinmux.c)

void muxInit(void){

/* USER CODE BEGIN (1) */
/* USER CODE END */

    /* Enable Pin Muxing */
    pinMuxReg->KICKER0 = 0x83E70B13U;
    pinMuxReg->KICKER1 = 0x95A4F1E0U;
    
/* USER CODE BEGIN (2) */
/* USER CODE END */

    pinMuxReg->PINMUX[0] = PINMUX_BALL_N19_ | PINMUX_BALL_D4_EMIF_ADDR_00 | PINMUX_BALL_D5_EMIF_ADDR_01 | PINMUX_BALL_C4_EMIF_ADDR_06;

Notice the incomplete PINMUX_BALL_N19_ without any assigned function such as AD1EVT etc.

Obviously, this causes compile errors such as:

>> Compilation failure
app/halcogen/source/subdir_rules.mk:9: recipe for target 'app/halcogen/source/HL_pinmux.obj' failed
"../app/halcogen/source/HL_pinmux.c", line 236: error #20: identifier "PINMUX_BALL_N19_" is undefined
"../app/halcogen/source/HL_pinmux.c", line 278: error #20: identifier "PINMUX_BALL_F3_" is undefined
"../app/halcogen/source/HL_pinmux.c", line 282: error #20: identifier "PINMUX_BALL_B2_" is undefined
"../app/halcogen/source/HL_pinmux.c", line 294: error #20: identifier "PINMUX_BALL_B12_" is undefined
"../app/halcogen/source/HL_pinmux.c", line 310: error #20: identifier "PINMUX_BALL_N3_" is undefined
5 errors detected in the compilation of "../app/halcogen/source/HL_pinmux.c".
gmake: *** [app/halcogen/source/HL_pinmux.obj] Error 1

Why is halcogen generating invalid code? There are no conflicts listed under Pin Muxing in the halcogen PINMUX tab.

How do I resolve this?

Thank you

Subu

↧
↧

AM5728: RGMII impedance matching

March 15, 2019, 5:06 am
$
0
0

Part Number:AM5728

Where can I find RGMII impedance matching requirements between AM5728 and KSZ9031RNX?  

How about impedance matching between KSZ9031RNX and RJ45 ?

Thanks!

↧

TRF7970A: TRF7970A Time-out

March 15, 2019, 5:07 am
$
0
0

Part Number:TRF7970A

Hi expert,

My customer tries to implement "time-out" processing in case no response, during writing command to Tag(RF-HDT-DVBB), 

they can utilize Irq_noresp in IRQ Status Register (0x0C) for this purpose ?

Another question, What is worst case of processing time of Read_Single_Block, Write_Single_Block in RF-HDT-DVBB?

Is there any application note ? REQUEST MODE(NON-ADDRESSED) affects on processing time ?

↧

TPS65131: TPS65131 VNEG output -6V output ripple

March 15, 2019, 5:12 am
$
0
0

Part Number:TPS65131

Hi ti team,

     input 5V,output 6V/50ma,-6V/50mA for LCD, then test output find -6V output ripple is too high,SCH,PCB and output ripple as below

Could you pls help if there is anyting we can do to improve? thanks!

↧
Search

AM3352: DDR3L connections

March 15, 2019, 5:12 am
$
0
0

Part Number:AM3352

Hi Champs,

We try to connect AM3352 and DDR3L.

To improve neat PCB wire , we would like to bit swap or byte swap at Data line on the H/W.

Is it possible such a modification ?

Regards,

Kz777

↧
↧

IWR6843: MIMO Chirp Patterns

March 15, 2019, 5:13 am
$
0
0

Part Number:IWR6843

Hi,

I'm just wondering if the new 6843 and specifically the long range people counting lab support the single antenna MIMO chirp pattern as recommended by the chirp estimator tool when "long range" is selected? If so, what config params should be used to enable this?

Thanks!

↧

CC3100BOOST: SPI settings for host communication.

March 15, 2019, 5:16 am
$
0
0

Part Number:CC3100BOOST

Hi,

I am trying to interface CC3100BOOST with MCU in SPI mode.

SPI has different settings like

1)SPI speed

SPI_FREQ_125K
SPI_FREQ_250K 
SPI_FREQ_500K
SPI_FREQ_1M 
SPI_FREQ_2M 
SPI_FREQ_4M 
SPI_FREQ_8M 
2)SPI MODE
SPI_MODE_0 ///< SCK active high, sample on leading edge of clock.
SPI_MODE_1 ///< SCK active high, sample on trailing edge of clock.
SPI_MODE_2  ///< SCK active low, sample on leading edge of clock.
SPI_MODE_3  ///< SCK active low, sample on trailing edge of clock.
3)Bit order
SPI_BIT_ORDER_MSB_FIRST  ///< Most significant bit shifted out first.
SPI_BIT_ORDER_LSB_FIRST ///< Least significant bit shifted out first.
what are the recommended settings for cc3100??
Thanks
Suresh
↧

CSD19538Q3A: Calculating Temperature when using pulsing

March 15, 2019, 5:17 am
$
0
0

Part Number:CSD19538Q3A

Hi,

I want to make a constant current LED driver with a MOSFET, shunt, opamp configuratie. 

The specs of the LED driver:

  • Frequency: 1-100 Hz
  • Forward current: 1 A
  • pulse duration: 1-300 micro seconds
  • Source: 48 V
  • Forward voltage LED's: 34.5-45 V
  • Sense Resistor: 1 ohm
  • Pmosfet: max 12.5 W during pulse
  • Ambient temperature: 60 degree C

I came up with the schematic underneath Vic is set by a analog output and Pulse sets the frequency and duration of the pulse.

Now my question how can I find a suitable MOSFET that can handle the given power dissipation without the requirement of adding a heat sink.

↧

Compiler/MSP430F47167: I am getting this error when compiling the code " undefined reference to __low_power_mode_off_on_exit" . Will someone resolve this issue?

March 15, 2019, 5:18 am
$
0
0

Part Number:MSP430F47167

Tool/software: TI C/C++ Compiler

Hi

I am using IAR Embedded workbench in windows, I didn't get any error like this but I am seeing this error using msp430-gcc compiler in ubuntu 16.04. Can anyone please resolve this error? 

The error is given below :

/home/rrlogicsys/Desktop/msp430f47167/test_ADC/main.c:178: undefined reference to `__low_power_mode_off_on_exit'
/tmp/cceqsyCD.o: In function `SD16AISR':

Thank you

Mahesh

↧
↧

DP83849IF: DP83849IF snoop mode

March 15, 2019, 5:22 am
$
0
0

Part Number:DP83849IF

Hello.

Our startup want to create the simple snoop device for industrial cyber security systems.

Is such scheme can work? Is it possible to configure ICs by only straps?

↧

CCS/LAUNCHXL-CC1310: How to link config.h file to my project

March 15, 2019, 5:23 am
$
0
0

Part Number:LAUNCHXL-CC1310

Tool/software: Code Composer Studio

Hi,

    I have created a new project and added "adcsinglechannel_CC1310_LAUNCHXL_tirtos_ccs"  example of "simplelink_cc13x0_sdk_2_40_00_20"  as a dependency to it.  When tried to build the configuration for my project, there was one error: Description Resource Path Location Type #1965 cannot open source file "sys/config.h" . So i searched for config.h file for TIRTOS but i couldn't find it.  Please help me in finding the config.h file and linking it to project. Thank you.

↧
Search

IWR6843: IWR6843 Antenna design related documents or training materials

March 15, 2019, 5:24 am
$
0
0

Part Number:IWR6843

Hi ti team,

     Want to know the design of large gain mass production version of the antenna, what are the work to do and what kind of tools, methods and so on.

Do you have Antenna design related documents or training materials to me?

  • If there is a good solution company can also be introduced.

  • thanks!

↧

CD4051B-Q1: Capability for Full rail operation

March 15, 2019, 5:29 am
$
0
0

Part Number:CD4051B-Q1

Hi Team,

I want to know if CD4051B-Q1 can deal with rail to rail signal(0~5V signal) under following condition or not.
I'm expecting that I can get we can get same voltage level signal from CD4051B's output.

VDD = 5V
VEE = VSS = 0V
Signal range : 0~5V

Do you have any data or equation to estimate how much drop will be appeared at output side?


The Datasheet says as below, so I believe the signal level is almost same(some drop might exist due to Ron and though current)

>The analog signal (through the TG) may swing from VEE to VDD

Regards,

Takashi Onawa

↧
↧

IWR6843ISK-ODS: Overhead People Counting Demo

March 15, 2019, 5:31 am
$
0
0

Part Number:IWR6843ISK-ODS

Hello TI,

I've just downloaded new Industrial Toolbox (v3.3.0) and started playing with the Ovehread PC demo. Unfortunately, the user guide looks very confusing (something like mixture of previous user guides with some updates). As well, I'm not able to run GUI B at all. The only message I get is "UART COM" in the console and nothing else happened.

Maybe I'm doing something wrong.

Thank you for your help, Lukas

↧

PMP5513: Need transformer specification for 2642.5001A used in PMP5513 design.

March 15, 2019, 5:33 am
$
0
0

Part Number:PMP5513

Do have the specification for the transformer T1 used in this design i.e. for 2642.5001A transformer from Pulse Electronics.

↧

Compiler/C6000-CGT: support of __builtin_return_address()

March 15, 2019, 5:38 am
$
0
0

Part Number:C6000-CGT

Tool/software: TI C/C++ Compiler

Could you add to CGT real support of __builtin_return_address() compiler intrinsic ?

While I call it, it returns always zero. I am interested only in current function return address => __builtin_return_address(0);

↧
Viewing all 262198 articles
Browse latest View live
Search
<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>