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Compiler/LAUNCHXL-CC1310: Error[Lp017] when code size increase

December 25, 2017, 7:00 pm
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Part Number:LAUNCHXL-CC1310

Tool/software: TI C/C++ Compiler

Hi,

One of my customer is evaluation CC1310 and encounter below problem.

Hardware Platform: CC1310 LaunchPad

IDE: IAR 8.11.2.13606

When the code size is small, it works well. But after adding some applications, the code size increases, and gets 

Error[Lp017]: the address of "ti_sysbios_knl_Clock_doTick__I" was needed when
computing compressed initializers for section .data
(release_prm3.orm3 #127), but that address hasn't been set yet, since
the size of the compressed initializers are needed in order to set it

CC1310_LAUNCHXL_TIRTOS.icf is used and has not been modified.

I try to find the answer in EWARM_DevelopmentGuide.ENU.pdf, but get litter information. I have below questions:

1. when will initializers be compressed, and how to control

2. how to "place compressed initializers last"?

3. what is the suggested method to solve this issue?

please help to look into this issue and give your advise, Thanks!

in EWARM_DevelopmentGuide.ENU.pdf, it says

When initializers are compressed, the exact size of the compressed initializers is
unknown until the exact content of the uncompressed data is known. If this data contains
other addresses, and some of these addresses are dependent on the size of the
compressed initializers, the linker fails with error Lp017. To avoid this, place
compressed initializers last, or in a memory region together with sections whose
addresses do not need to be known.

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BQ76PL455A: Orcad (DSN file)

December 25, 2017, 7:14 pm
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Part Number:BQ76PL455A

HI Sir 

1. May I know BQ76PL455A could be used with LiFePO4?

2. Could you kindly help to share the ORCAD (DSN) File ?

Thanks

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msp430G2433: AD converter to get the voltage of capacity

December 25, 2017, 7:16 pm
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Part Number:msp430G2433

Hi ,

    I have a capacity recharge circuit, what I want  to do is get the voltage grow process of the capacity via AD converter, But I found that when the mcu working in 8MHZ mode, AD converter can touch the target value then return, but when working at 12MHZ, AD converter can not reach the target value. which means the voltage of capacity hasn't charge action. or there i something wrong with the charging process.

    So, can AD converter of MSP430 connect to capacity directly to get the voltage of capacity? would you please give me some explanation or material of  how AD of msp430 working. 

Hope for your  response. thanks!

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ADS1148: Input capacitance and resistance

December 25, 2017, 7:30 pm
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Part Number:ADS1148

Hi,

Could you let me know input capacitance and resistance of each channel input of ADS1148?

Thanks.

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SND9039A1BT PMIC for Frequency spec

December 25, 2017, 7:38 pm
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Hi Sir,

Our customer response the SND9039A1BT  frequency not meet datasheet spec.

Please see as below Measurement results, this is allowed?

Could you please share the Maximum and minimum of Frequency?

BUCK2 current 1A is 1.388MHZ but SPEC 2MHZ. 
BUCK3 current 1A is 1.597MHZ but SPEC 2MHZ.
BUCK4 current 1.7A is 2.421MHZ but SPEC 2MHZ. 
BUCK5 current 5A is 4.279MHZ but SPEC 3.2MHZ. 

Hugo

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What is a good Boost-LED-Driver with multi channel high precision dimming options (shunt FET dimming)

December 25, 2017, 7:39 pm
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Hello TI-Community,
i am searching for a solution to build a small battery (4s1p: 13,2V; 8-14,4V LiFePo4) powered multi-colored - multi-'pixel' (RGB or RGBA or more colors per pixel) high power led fixture for a theater prop.

i have found the article in the blog post about shunt FET dimming - and that is also what i found should be the best bet for my approach in general.

for this i found that the TPS92661-Q1 could be one option to have a bunch of things integrated.

other option would be to just use some small FETs and drive theme with an PCA9685 (16-channel, 12-bit PWM I2C-bus LED controller) or similar.

in the blog post it mentions
  • TPS92641
    Synchronous Buck Controllers for Precision Dimming LED Drive
    20,000:1 Shunt FET PWM Dimming
  • LM3409
    PFET Buck Controller for High Power LED Drives
    10,000:1 PWM Dimming Range
  • TPS92515
    2A LED Driver with Integrated NFET, High-Side Current Sense, and Shunt PWM Dimming Capable
    10,000:1 Shunt PWM Dimming Range
currently iam planing on using 12 leds and to drive the leds at about 0,5 - 1A
so if i want to drive theme all with the same constant current driver i would need about up to 40V output.
so i need a boost regulator to boost my battery voltage up.
Is there an boost constant current led driver you can recommend for this kind of setup?

this is my first design with dc/dc converters and its only an single build up -
so i am fine with easy (but pricy) modules ore similar recommendations :-)
looking forward to your suggestions, tips and ideas.
sunny greetings
stefan
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TPS61093: Input Current calculation

December 25, 2017, 7:50 pm
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Part Number:TPS61093

Hi,

I'd like to verify the input current for TPS61093:

Test condition as below:
Vin = 3.3V
Vout = 5V
Iout = 0.8A

I tried used WEBENCH to simulate the above test condition by setting the Iout 0.3A (0.8A exceeded the switching current limit) , the average Iin obtained was ~0.67A
Could you help to advise if this is correct way to check the input current?

Hope to hear from you soon
Thanks

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CCS/TMS320F28379D: Displaying a sine wave graph from a tmu example

December 25, 2017, 8:01 pm
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Part Number:TMS320F28379D

Tool/software: Code Composer Studio

Hi everyone,

I'm trying to display a sine wave graph from an example of control suite studio called tmu_sinegen, however, It doesn't have much information

of how to display the sine wave graph. What are the correctly properties?

Can anyone help me?

Thank you so much!

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CCS: Program mode compilation fails

December 25, 2017, 8:05 pm
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Tool/software: Code Composer Studio

There's a problem with Program Mode Compilation reproducable starting from at least CCSv5 to CCSv7 (checked myself).

If source files are located at the same directory, program mode compilation work, if creating sub-directories, or adding more source directories - it doesn't.

Compilation works normally without 'program mode compilation' option enabled.

Adding source locations to 'paths' in CDT doesn't help.

Note1: I've found the same problem existed in CCSv4.4 and wasn't resolved due to: https://e2e.ti.com/support/development_tools/compiler/f/343/t/98506

Note 2: I cannot share my project, but this bug can be reproduced easilly.

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CCS/IWR1642: Why IWR1642 DSP subsystem hanged at soc_init()?

December 25, 2017, 8:07 pm
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Part Number:IWR1642

Tool/software: Code Composer Studio

hi,

when i compile MMW demo dss project in ccs, it show some warning here. 

When running DSS subsystem in CCS debug mode, it will hang at soc_init().

But when change compiler optimization options from off to o3, still warning there, but will not hang at soc_init() any more.

what is the problem?

Thanks

log is attached.(Please visit the site to view this file)

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TMS320F28069: The size of Exposed Thermal Pad

December 25, 2017, 8:09 pm
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Part Number:TMS320F28069

Hello,

Our customer use the TSM320F28069UPZPS.

The customer have a question about the size of the Exposed Thermal Pad as follows.

(Please visit the site to view this file)

Could you tell me the answer?

Best Regards,

Naoki Aoyama

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TMS320F28379D: Regarding Programming and debug the code

December 25, 2017, 8:25 pm
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Part Number:TMS320F28379D

Dear Sir, 

Currently, I am using Xds100 v3 probe for programming and debugging purpose, But as my code length is increasing I am facing the long programming time to debug my code. I am working on one of the big projects of railways. 

Please suggest me that if I will have a full license of CCS then which debugger is suitable for me. This is really very boring to wait for code transferring into the processor. 

Thanking 

Ashutosh

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LM5045: recommended range of REF capacitor value

December 25, 2017, 8:37 pm
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Part Number:LM5045

Hi Team,

The datasheet shows the recommended range of REF capacitor values are 0.1~10uF.



Could you tell me what is occured if we use less than 0.1uF and more than 10uF?

Best Regards,
Yaita / Japan disty

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TPS53014: Tuvpdel

December 25, 2017, 8:39 pm
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Part Number:TPS53014

Hi,

We got a question from the customer about TPS53014.
Could you help us?

[Question]
How much is the variation of the Output UVP delay(Tuvpdel)? They don't need guarantee. They will use it as reference.

Best Regards,
tateo

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CCS/LAUNCHXL-F28069M: Some hardware questions about InstaSPIN-FOC application

December 25, 2017, 8:39 pm
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Part Number:LAUNCHXL-F28069M

Tool/software: Code Composer Studio

1.We have designed a  sensorless motor driver with TI-InstaSPIN-FOC.and I refered to the Launchpad-28069M and the Boostpack-DRV8305EVM.

MCU:TMS320F28069M  Gate driver: DRV8305         MOSFET: TI's CSD18540Q5B.

Now I need to  design a new hardware revision for bigger current.

I Want to use other high  current Power MOSFET. Can you provide TI related references or application notes on the matching design of the DRV8305 and other MOSFETs?

Or reference documentation for IDRIVE applications on the DRV8305 to match the DRV8305 and other MOSFETs

because I do not know whether the drv8305 driver current match the new MOSFET.


2.In BoostXL-DRV8305EVM ,DRV8305 and CSD18540Q5B did not have a drive resistance, do not need a drive resistance? Why DRV8301 reference design has 10 ohm drive resistance?

do you have the refered theoretical and calculation guidance note about the  drive resistance?

3. BoostXL-DRV 8305EVM are used DRV8305 and MOSFET and shunt resistor on the same drive board.


We are going to put the 28069M and DRV8305 on the same control board. In this way, the current and voltage sample  signals and the MOSFET driving signal need to be connected with the driving board through the pins just like the  Launchpad-28069M and the Boostpack-DRV8305EVM .
I am  concerned about the current sampling signal over the pin into the 8305's op-amp, It will result in the current signal detection  error?
This layout scheme is feasible? What needs attention in the layout?

4. Regarding MOSFET parallel scheme, whether TI has the  reference document to learn. Guide the IDRIVE drive current and MOSFET parallel layout design.

5.DRV8305 and DRV8323 (support for high voltage)have the same  SPI protocol . software is compatible?


Thanks ~

Hope to get the reply of TI engineer ~

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CCS/CC2640R2F: Communication between CC2640R2F and CC2541 through proprietary mode

December 25, 2017, 8:46 pm
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Part Number:CC2640R2F

Tool/software: Code Composer Studio

Hi TI Folks,

  Good day to you.

  We are planning to use proprietary mode in 2 Mbps GFSK, the CC2541 is used for sender (TX), the CC2640R2F is used as receiver (RX):

Refer to datasheet, the Data rate and modulation format are as below:

CC2541:  2 Mbps, GFSK, 500-kHz deviation 

                2 Mbps, GFSK, 320-kHz deviation, 

CC2640R2F: 2-Mbps GFSK (Bluetooth 5) – RX --> Frequency error tolerance is -300 kHz ~ 500 kHz

 

Please advise above plan workable or not?

1. In this communication application, Do both CC2541's 500-kHz and 320-kHz deviation be workable with CC2640R2F?

2. Refer to User's Guide of CC2541 and CC2640R2F: The data package is difference in below:

  Please share the more information for this kind of application, and share the example project / code if have.

Best regards

Jiang WeiJi 

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TUSB319-Q1: Result of FMEA document

December 25, 2017, 8:57 pm
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Part Number:TUSB319-Q1

Hi,

My customer is requiring FMEA document of TUSB319-Q1.

Could you provide it?

Required condition are follows;

For all pins about Short to battery, Short to GND, Short to neighboring pin, Open

Best Regards,

Kuramochi

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WAVEVISION5: Importing of files in Wavevision 5 from Xilinx chipscope data

December 25, 2017, 9:06 pm
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Part Number:WAVEVISION5

Not able to activate the Wavevision 5 "Sampling Rate" tab. I have tried editing the .ini file present in the wavevision 5 installed directory as mentioned in the TI forum.

Kindly give some permanent solution.

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CC2650EM-5XD-RD: How to make ZED rejoin after leave/remove?

December 25, 2017, 9:09 pm
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CCS/MSP430F67791A: ADC Interrupt issue

December 25, 2017, 9:18 pm
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Part Number:MSP430F67791A

Tool/software: Code Composer Studio

Dear All,

I had to configure ADC such that i receive ADC Interrupt every 200uSec on completion of A to D Conversion of all  7 Channels.

I have Configured a timer for 200usec wherein

{

SD24BIE |= SD24BIE6 (Enable interrupt on conversion complete of last channel)

}

I have configured my ADC with below settings for 7 Channels available for SD24B in MSP430F67791A .

{

SD24 Clock : SMCLK = 16MHz

OSR : 256

SD24PDIV = 3

SD24DIV = 0

Left Alignment

Group Conversion

SD24BIE = SD24IE6  (In order to receive interrupt on conversion complete of the Last channel)

}

In ADC Interrupt : 

{

Samples are been taken

SD24BIE &=  ~SD24IE6 ;

}

The code works absolutely fine i.e. I receive ADC Interrupt every 200uSec, if I the last channel (Channel 6) reading are not been used.(Interrupt enabled for last channel)

Even if i move the Last channel readings (SD24BMEMH6 & SD24BMEML6) into a temp_Variable , the ADC Interrupt in not obtained every 200uSec (it is almost doubled i.e around 400usec).

It is been observed that for what ever channel SD24BIE |= SD24BIE6 ADC Interrupt is been enabled , this behavior repeats i.e. if interrupt enable been done for 5 th channel  SD24BIE |= SD24BIE5 ,on handling the results of 5th channel (SD24BMEMH5 & SD24BMEML5)  the ADC Interrupt time is altered .

Need your help for solving this issue.

Regards,

Shweta Shelar

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