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

CC2640R2F: AOA SDK 3.20 - What is the rational for the approximation and logic of the ita2 and AOA_iatan2sc functions

October 3, 2019, 2:54 am
$
0
0

Part Number: CC2640R2F

Hi,

Is there any documents that provide details about the implementation of the angle calculation in the functions ita2(y,x) and AOA_iatan2sc(x,y)?

I am currently using simplelink_cc2640r2_sdk_3_20_00_21.

1. Specifically, what kind of approximation is made in ita2(y,x) and what is the error rate?

2. I do not understand the logic in the function AOA_iatan2sc(x,y). Within each pie of the octant a specific formula is used, could you explain the rational behind the logic?

3. Does TI plan to release a new SDK any time soon?

Thanks,

David 

↧
Search

TMS320F2808: Storing Data to Flash via Simulink/Embedded Coder

October 3, 2019, 2:55 am
$
0
0

Part Number: TMS320F2808

Hi everyone,

I am working with f2808 processor in Simulink. As far as I know, it is not possible to program the flash dynamically (storing data) for any purpose via Simulink. Is there any workaround for this issue by using Simulink?

PS: I know about the flash API functions and their related examples, so please do not mention them. Also, it is not possible for me to use an external EEPROM at this case.

↧
↧

CCS/TMDSCNCD280049C: What is the proper setup for external CAN signals to see?

October 3, 2019, 2:57 am
$
0
0

Part Number: TMDSCNCD280049C

Tool/software: Code Composer Studio

I am using the C2000 ware examples 

I am try the example can_ex3_external_transmit there is no signals at CANTXA pin GPIO31 or after CAN transeiver 

I dont see any signal post the function CAN_sendMessage both in debug or non debug modes.

I am using sn65hvd251 for CAN transeiver. this works fine when i use can_ex1_loopback both at CANTXA pin GPIO31 and after CAN transeiver.

This is same problem with LAUNCHXL-F280049C in ticket: https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/787271?CCS-LAUNCHXL-F280049C-What-is-the-proper-setup-for-external-CAN-communications- , which is not solved.

↧

DRA829 : OSPI XIP some confirmations

October 3, 2019, 3:05 am
$
0
0

Hi everybody , 

about  OSPI XIP   as far as I understand  it is available only after booting  am I right ?

So if  you cannot do OSPI  XIP  during  boot  , can you do  QSPI  XIP in booting ? using same HW 

my concerns is to reduce booting time  and XIP would be great , and ideally I m planning only one memory OSPI 

any suggestion is welcome

thank you 

best regards

Carlo

PS   -->     4.6.4.2 OSPI Loading Process OSPI boot mode is not executable-in-place (XIP). ROM code first copies boot image into on-chip RAM and then executes it.

 

↧

TPS735: About fast start-up LDOs

October 3, 2019, 3:11 am
$
0
0

Part Number: TPS735

Hello support team、

I'd like to propose two types of LDOs which start-up fast to our customer.
The required specifications of LDOs are as follows.

[LDO1]
Input voltage: 5.6 V
Output voltage: 3.3 V and 5 V (variable type is acceptable)
Output current: 300 mA
Time from output enable ON to output voltage stabilization: less than 500 μs (at COUT = 1 μF)

[LDO2]
Input voltage: 5.6 V
Output voltage: 3.3 V and 5 V (variable type is acceptable)
Output current: 1 A
Time from output enable ON to output voltage stabilizes: less than 500 μs (at COUT = 1 μF)

I’m trying to propose the following ICs.
[LDO 1] --> TPS735, LP38693
[LDO 2] --> LP38692

Is there any other good product you can suggest?

Sincerely,
M. Tachibana

↧
↧

BQ78350-R2-DEVICE-FW: Diffrence between SafetyStatus and SafetyAlert

October 3, 2019, 3:11 am
$
0
0

Part Number: BQ78350-R2-DEVICE-FW

Hi team,

I'd like to know the difference between SafetyStatus and SafetyAlert, and how they are set by the cell voltage.
I charged the 14S battery with BQ76940 and BQ78350-R2 to COV threshold voltage which is 4150mV.
In this charging, COV of SafetyStatus was set when the highest cell went about 4000mV, and COV of SafetyAlert wasn't set.

I attach the screenshot when relax after charge for the reference.
You will see the COV of SafetyStatus is still set and the one of SafetyAlert is not set.

Regards,
Makoto Teramoto

↧

LSF0102-Q1: -

October 3, 2019, 3:19 am
$
0
0

Part Number: LSF0102-Q1

What should be done for unused A nd B port pins of LSF0102QDCURQ1?

↧

TIDA-00363: Relation of Tracking Rate to Sampling Frequency

October 3, 2019, 3:21 am
$
0
0

Part Number: TIDA-00363

Referring to TIDA 00363. I have the following carifications

1. How to convert the position information to digital. Will this conversion lead to truncation errors?

2. Does tracking rate depend on the sampling frequency. For eg For a 12 bit RDC at 100 RPS, rollover takes place at 409500 counts/sec. This means every LSB changes at 2.44us. Could this mean that to detect this change in ATO, sampling rate should be atleat 2.440us or 400Khz? Will 20 KHz work?

↧
Search

AM26LV31E-EP: Operating free-air temperature range

October 3, 2019, 3:27 am
$
0
0

Part Number: AM26LV31E-EP

Hi Team, we would like to clarify the operating free-air temperature range on the datasheet. The values on the absolute maximum rating and the recommended operating condition are the same. Does this mean the if the device operates at -55 deg C and 105 deg C the device would respond as expected?

Thank you for your help.

↧
↧

WEBENCH® Tools/PROCESSOR-SDK-OMAPL138: ROTS/OMAP-L138/lcdk-06.00.00.07-Windows-x86-Install:Sdk samples are not created.

October 3, 2019, 2:39 am
$
0
0

Part Number: PROCESSOR-SDK-OMAPL138

Tool/software: WEBENCH® Design Tools

Hi

Part Number: ti-processor-sdk-rtos-omapl138-lcdk-06.00.00.07-Windows-x86-Install.exe
Installed.

Steps

1.Install CCS9.1 (CCS9.1.0.00010_win64.zip) to C:TI.
2.Processor-SDK-ti-processor-sdk-rtos-omapl138-lcdk-06.00.00.07-Windows-x86-Install.exe) installed in the default folder
3.run setupenv.bat at c:tiprocessor_sdk_rtos_omapl138_6_00_00_07.
4.run benchmarkProjectCreate.bat at c:tiprocessor_sdk_rtos_omapl138_6_00_00_07demosaudio-benchmark-starterkit.
5.Check environment variables with the set command.

   4. An error occurs in the item.

How do I create one?

↧

CCS/TMS320F28069M: WATCHDOG Reister don't change value after run code to configure this module for Lab5 in C2000ware workshop

October 3, 2019, 2:44 am
$
0
0

Part Number: TMS320F28069M

Tool/software: Code Composer Studio

Hi everyone,

I'm a newbie in TI communication. I'm trying learn more about lauchpad tms32f28069m by doing exercises in C2000ware workshop.

When doing Lab5 about watchdog, the WATCHDOG register (WDCR, WDKEY and SCSR) don't change right value after run code to configure this module which required in Lab5.

Before run code:

After run code:

So I cannot control watchdog module to complete this lab5.

Please help me, I'm using CCS v7.3.0

Thanks very much

↧

PGA281: Below 10nA current measurement range?

October 3, 2019, 3:02 am
$
0
0

Part Number: PGA281

With the PGA281 is it possible to measure 10uA to 100mA with a voltage of ±15V.

We use it as a High-Side current measurement solution.

My question is:

1. Is it possible to measure 10nA with an input voltage of ±15V. If Yes How??

If No

2. Is there an other PGAxxx or something else with a programmable gain that does lower currents at high voltage range (±15V. )

↧

WEBENCH® Tools/430BOOST-CC110L: ATC Booster Pack program recieve no data whene i send it from master stm32 & cc110l

October 3, 2019, 3:38 am
$
0
0

Part Number: 430BOOST-CC110L

Tool/software: WEBENCH® Design Tools

Hello,

I'm using CC110L BoosterPack with stm32, I want to send the data from the Master (STM32 &CC110L) to slave receive (STM32 &CC110L) with IDE EWARM.
I configured the master with frequency 868 MHz to send the data to the slave.
The command SPI passed with successfully to RF Module CC110L and the RF module send the data as he shows the figure 1 on SDR.
my problems are (always the frequency is 868Mhz)
1 - the master sends data, but in slave I can't receive this data withe two (STM32 &CC110L)
2 - the same code works for send and receive data in Code Composer Studio with two launchpad (MSP430 & CC110L)
3 - Not data Recieve when I configure the slave with the (MSP430 & CC110L) te receive the data sent from the master (STM32 & CC110L)

4 - In MSP430 the frequency 902Mhz works but in STM32 not work

figure 1 : data sent from master STM32 & CC110L

figure 1 : data sent from master MSP430 & CC110L

↧
↧

DLPDLCR2000EVM: EVM with Raspberry pi4

October 3, 2019, 3:45 am
$
0
0

Part Number: DLPDLCR2000EVM

Beagle bone black performance when playing a video is very slow. It is moving bit by bit. I thought of integrating EVM with Raspberry pi4, so I followed many tutorial in online, including the below:

https://e2e.ti.com/support/dlp/f/94/p/651931/2395243

http://frederickvandenbosch.be/?p=2948

https://www.mickmake.com/post/build-a-pi-zero-w-pocket-projector-project

What I am seeing when I do i2cdetect :

EVM hardware is found at 7, but the document says 3:

sudo i2cset -y 3 0x1b 0x0c 0x00 0x00 0x00 0x13 i

sudo i2cset -y 3 0x1b 0x0b 0x00 0x00 0x00 0x00 i
So it is failing:
Error: Could not open file `/dev/i2c-3' or `/dev/i2c/3': No such file or directory
How do I proceed to debug in order to see Raspberry desktop.
Raspberry Version: "Raspbian GNU/Linux 10 (buster)"
↧

SN74AC04: IOH Questions

October 3, 2019, 3:52 am
$
0
0

Part Number: SN74AC04

Hello,

Please answer my customer's question:

IOHmax = 75mA (However, it is 2ms or less. In this case, it is judged that there is no problem because the ON ratio is 1/246 under the condition of 65μ / 16ms.) Question 1: Is the above judgment valid when using it permanently? ?

Question 2: If Question 1 is not valid, what is the above table for?

Question 3: VOH at 75 mA is Min: 3.85 V. How much does it vary for each individual when the load ON time is 65μ / cycle is 16 ms?

Regards,

Itoh

↧
Search

CCS/CC3235MODSF: Missing source file "sys/time.h"

October 3, 2019, 3:53 am
$
0
0

Part Number: CC3235MODSF

Tool/software: Code Composer Studio

Greetings,


I am facing an issue when building a CCS project for the LAUNCHXL CC3235SF. I added some functions from httpclient.h and now whenever I try to build, it shows an error saying "#1965 cannot open source file "sys/time.h"". Is there any dependency that is needed to be added to the project properties?


Note: I am using the compiler TI v18.12.2.LTS and started to sketch the project from the demo example "power_measurement_CC3235SF_LAUNCHXL_nortos_ccs_syscfg".

Best Regards,

Edgar

↧

CCS/TRF7970A: TRF7970A SDM Bit Clock Problem

October 3, 2019, 3:57 am
$
0
0

Part Number: TRF7970A

Tool/software: Code Composer Studio

Hello everyone.

TRF7970A chip  continues  make make me crazy. How hard to learn it. 
I did not achive to pass authentication 14443A MIFARE CLASSIC TAG. And I tracked problem with logic analysor.
Problem is that, there is no any SDM Bit Clock pulse from TRF to MCU. Activatig TAG is OK because I saw 4 byte UID on my LCD and UID is corrected
with M302 RFID reader/writer. 

MCU : FR6989

DCO Freq : 8 MHz
MCLK Freq : 8 MHz

SMCLK :8 MHz

SPI Freq : SMCLK / 4 = 2 MHz

Code derived from : SLOA214 DOC 

Best regards.....

(Please visit the site to view this file)



↧
↧

TPS549B22: Output and Input CAP check

October 3, 2019, 3:58 am
$
0
0

Part Number: TPS549B22

Hi E2E,

Because we want to less layout area, could you check block 1~3 and let us know the minimum cap  demanded!

Thanks!

VDD0V8(0.8V)

TPS549B22RVFR

Vin=12V, Vout=0.8V, IOUT=15.1A

DC ripple SPEC is +/- 3%, Transient SPEC is +/-7.5%.

↧

TPS50601A-SP: Junction-to-ambient thermal resistance

October 3, 2019, 4:16 am
$
0
0

Part Number: TPS50601A-SP

Hello team,

We have a customer that is asking for Junction-to-ambient thermal resistance value. Appreciate your help.

Regards,

Roland

↧

BQ40Z80: Daisy Chaining

October 3, 2019, 4:20 am
$
0
0

Part Number: BQ40Z80

Can we use bq40z80 in daisy chain configuration to make a higher voltage battery pack?

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