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MSP430G2553: Current sampling problem with 10bit adc

February 6, 2017, 8:09 pm
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Part Number:MSP430G2553

Hello,

I am trying to sample current with the 10bit adc of the msp430g2553 mcu by converting it to voltage.

I have a simple photo diode which outputs current.

I connect its output to ground through a resistor of 50k ohm. I then measure the voltage drop on the resistor using the adc. It doesn't work. When the resistor is connected to the adc pin then I measure a voltage of around 2.75V using my multimeter. When I disconnect the adc pin then I measure 100mv on the resistor which makes sense.

Why does connecting the resistor to the adc pin create this problem?

What am I missing?

I am using one of the code examples in CCS for 10bit ADCs using 1.5v reference voltage with interrupt and DTC.

By the way, if I connect to the same adc pin a voltage source then the measurement is fine and isn't altered.

Thanks,

David

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TSW14J56EVM: Save data capture

February 6, 2017, 8:17 pm
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Part Number:TSW14J56EVM

Good morning

Is there a continuous way to save  raw data that comes from TSW14J56EVM  from the GUI HSDCpro? Is there a way to  do that?

I am really interested to save the obtained data in a interval of established time.

Regards,

Miguel Enrique

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TMDS570LS31HDK: Need LWIP_NETCONN enabled TCP example source code

February 6, 2017, 8:26 pm
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Part Number:TMDS570LS31HDK

I enabled the enabled the lwip by referring the demo file and successfully pinged the board. I am trying to include LWIP_NETCONN with tcp for my application , When I enabled that in opt.h , I am facing many errors. Kindly post if any demo files available in that category. 

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TMS320C6713: TMS320C6713-FFT POWER SPECTRUM ANALYSIS FOR REAL TIME SIGNAL

February 6, 2017, 8:33 pm
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Part Number:TMS320C6713

I have chosen to use TMS320C6713 processor my project. I want analysis power spectrum analysis using FFT for a real time signal. Please tell me the procedure to estimate power spectrum and also to desing FIR filter

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TLC5941: About Icc

February 6, 2017, 8:43 pm
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Part Number:TLC5941

Hi,

I am doing motion verification.
If VCC (= 3.3 V) is turned on in the following condition, Icc of TLC 5941 may continue to flow near 80 mA.
I think that the current consumption is high, but what kind of cause can be considered?

(conditions)
R (IREF) = 866 Ω
SCLK, SIN, MODE = Low fixed
BLANK = Active (3.66 kHz)
GSCLK = Active (15 MHz)
VLED (8 V), all channel

Also, in the case of R (IREF) = 866 Ω in normal operation, how much is Icc(max)?

Best Regards,

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TPS54202: Brownout

February 6, 2017, 8:47 pm
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Part Number:TPS54202

Hi,

I'm recognizing that the brownout is not occurred at low dropout and light load on the TPS54202.

Brownout → www.ti.com/.../slva547a.pdf

Because the TPS54202 is designed to operate at 100% duty cycle as long as the BOOT to SW pin voltage is greater than 2.1 V typically.

Is it correct?

Best Regards,

Kuramochi

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TPS68470: Layer needed to route TPS68470

February 6, 2017, 8:57 pm
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CSD95378BQ5MC: Application Schematic

February 6, 2017, 8:58 pm
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Part Number:CSD95378BQ5MC

Hi Team,

I found typo in datasheet page 6.
I believe it is not IMON, IOUT is the correct.
Could you modify in feature datasheet update?



Best Regards,
Yaita / Japan disty

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DLPDLCR3010EVM: GUI Issues (Display Menu)

February 6, 2017, 9:00 pm
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Part Number:DLPDLCR3010EVM

Hi Everyone,

I've been testing different parameters on the DLP GUI for the 3010 and I often get either no image or "pixelated colors/corrupt look". All the menus (Patterns and Images, IntelliBright, and Video and Color) work except Display. I get issues when I try to change any of the parameters in that menu such as Vertical Offset and Orientation. I always have to reset the EVM to get it back to normal. Is any one else having this issue? How can I fix this?

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The cable which is used to Update the UCDs

February 6, 2017, 9:13 pm
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Hi every one,

I want to update UCDs through the serial port using the BMC. but I couldn't yet because of errors. I doubted that maybe I'm using an incorrect Port and cable. I'm using mini usb port. connect one side of the cable to mini usb port which is located under the mini-USB connector of the emulator daughter card and the other end to the usb of the computer, is it right or I have to use another port and another cable? and I also install the FTDI Driver.

please help me to solve my problem sooner.

Regards

Matin

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TUSB3410: Application with VREGEN connected low

February 6, 2017, 9:19 pm
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Part Number:TUSB3410

Hi,

We plan to connect VREGEN low so that 1.8V supply is provided internally.  Is there any special concern about this that we need to take care of?  From datasheet as below, is it only required for the case that 1.8V supply is provided externally?

Thansk!

Antony

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TPS65094: I2C timing requirement

February 6, 2017, 9:22 pm
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Part Number:TPS65094

Hi,

We see below spec from Intel regarding I2C timing.  tHD:STA is defined as 0.26us minimym,  Now customer found this timing is 0.23us on their board.  Will that be an concern to TPS65094x?  I didn't see such timing requirement in TPS65094x datasheet.  Thanks!

Antony

Antony

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ADS1262: Giving Garbage value with other SPI slaves where as working perfect independently

February 6, 2017, 9:28 pm
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Part Number:ADS1262

I am interfacing ADS1262 with Arduino mega2560 along with TFT and sd card.

When I interface ads1262 with above given slave at that time, sometimes it activate and given output and sometimes it does not activate and giving garbage value or zero value.

Although it is giving perfect value when running independently.

I have attached photo of interfacing design. I have also attached code for reference.

I have configured POWER and REFMUX register.

Default value of POWER register is 0x11 which is change to 0x10 (INTREF disabled).

Default value of REFMUX register is 0x00 which is change to 0x12 (AIN2 & AIN3 used as external reference).

ADC is working in continuous mode.

What may be the issue?(Please visit the site to view this file)(Please visit the site to view this file)

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TPS54618: Resistor divider values too high

February 6, 2017, 9:32 pm
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Part Number:TPS54618

Hi,

The datasheet for the TPS54618 states: "If the values are too high the regulator is more susceptible to noise and voltage errors from the VSENSE input current are noticeable."

What is considered too high?

My customer has a solution with Rbottom = 267k and Rtop = 100k for 1.1Vout and sees about 30mV of noise which is resulting in the system shutting down. I have already checked the compensation.

Thank You,

Mike Ulrich

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BQ27220: Is there any header file or sample code available for this device?

February 6, 2017, 9:33 pm
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Part Number:BQ27220

Dear Sir/Madam

I am looking for a header file in C like bq27220.h for the Fuel Gauge device 'BQ27220'. Is there any code or sample available from TI?

I look forward to hearing from you.

Regards,

Majid

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TPS53355: Load Regulation Characteristics

February 6, 2017, 9:34 pm
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Part Number:TPS53355

Team-

Are there any min/max specs or additional data regarding the line regulation performance of the TPS53355 BEYOND what is found in Figure 10 of the data sheet?

The applications section also shows a requirement for the design shown there, but we are needing some evidence for the specifications of the device itself.

Thanks, Best, S. Dunbar, AFA Colorado

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MSP430FR2111: latest version of IAR Electronic Workbench

February 6, 2017, 9:41 pm
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Part Number:MSP430FR2111

I have been trying to download the latest IAR EW for MSP430. It only offers version 5.50 which is an older version. I want to use the newer MSP430FR2111 which is not present in the older versions. How do I select the newer versions rather than this older one?

Thanks

Peter 

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CCS/TMS320C6747: the ccs5.5 resume is grayed

February 6, 2017, 9:49 pm
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Part Number:TMS320C6747

Tool/software: Code Composer Studio

now i want down load my program into 8bit nand flash but when i run the program the resume button is grayed

 i pressed  suspend button and  then i press the resume,the disassembly show nop

i used  the  program before its work well but now it doesn't  work 

(Please visit the site to view this file)

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MSP430F6779A: 3 Phase energy meter voltage phase sequence reverse connection detection

February 6, 2017, 9:57 pm
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Part Number:MSP430F6779A

Hi,

I am working on 3 phase energy meter using MSP430F699A. Application Note - SLAA577G

I wanted to detect the R Y B Phase sequence reverse connection.

If input supply is connected in wrong Sequence (R B Y or  Y R B or B Y R), i wanted software to detect it.

How do i do this. Is the logic to detect reverse phase sequence is already implemented. 

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CCS: Unfamiliar CCSv7 error message

February 6, 2017, 10:00 pm
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Tool/software: Code Composer Studio

Dear All,

I downloaded the newest CCSv7.0.0.00043 from TI website.

And installed on my computer, CCS can build the C2000 project normally. This is new computer so that i din't need to delete the whole content in CCS folder.

But the error occurs when i click the "compile button". The CCS show me the error message as below.

 Because my computer is WIN10 system, I'm not sure may i missing some component?

Thanks for your comment. 

BR,

Bard

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