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BQ76930: Current measurement gain stage (low value shunt)

March 28, 2018, 1:14 am
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Part Number:BQ76930

Hi all,

I was wondering if anyone would have any suggestions about adding a gain block (opamp) of times 8 in front of the current measurement pins on the BQ76930. The need for this arises from the fact that in my design, the shunt which will be used to sense the current through the battery will be 500 microOhms and that can not change.

I was thinking of adding a difference amplifier (using the OPA333 for example), and converting the signal to single ended and feeding it to the SRN pin, while keeping the SRP pin to ground.

If I don't have a gain stage, the current resolution that I will have will be around 160mA per bit, which is too low of a resolution.

Cheers!

Aleks

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RTOS/LAUNCHXL-CC1310: figure out what leads cc1310 to error

March 28, 2018, 1:17 am
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Part Number:LAUNCHXL-CC1310

Tool/software:TI-RTOS

i build a project based on rfWsnNode using cc1310, but now i encounter a problem. the cc1310 works fine at frist, but after a couple hours cc1310 stopped, not every time, now i want to figure out what make cc1310 goes wrong, is there some way i can try?

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Linux/AM4378: How to calculate mmc daterates?

March 28, 2018, 1:17 am
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Part Number:AM4378

Tool/software: Linux

I am using am4378, and I notice that <max-speed> property of mmc nodes is 8000000 in my dts file.Its data width is 4bit mode. So how do I know the datarates in xxxBytes/s. I check the driver code, but it seems complicate. Thanks a lot.

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LF198-N: The differences between LF198AH/NOPB and LF198H/NOPB

March 28, 2018, 1:20 am
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Part Number:LF198-N

Hi team,

My customer needs to get the differences between LF198AH/NOPB and LF198H/NOPB.

The datasheet does not show this. Would you explain this?

Best Wishes,
Mickey Zhang
Asia Customer Support Center
Texas Instruments

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DRA626: BOOT ROM watchdog behavior

March 28, 2018, 1:21 am
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Part Number:DRA626

as below description, I understand after BOOTLOADER scan the device list set by bootmode, the BOOTLOADER will enter dead loop and waiting for watchdog(3 minutes) reset. But from test result seems the BOOTLOADER scan the device list in endless loop, for example I set bootmode[5:0] = 111110b, all device in the list are empty, UART0 output CCCCCCCC consequently, never stop, so I think the watchdog never overflow.

So please help check ROM code if below description is not accurate. 

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LM5116: LM5116 start up issue when SS cap is too large

March 28, 2018, 1:15 am
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Part Number:LM5116

Hi, 

I have a startup issue with LM5116 when I put the ss capacitor around 2.2uF. The controller stop switching during the softstart. Please refer to the waveform below: 

The CH3 is the feedback pin voltage and it is lower than the CH4 SS pin, but the control stopped switching. Could you please explain why?

This issue was not observed when I change the ss cap to 0.47uF.

Thank you.

Best Regards,

Oscar

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Linux/AWR1642BOOST: ROS package msg data format

March 28, 2018, 1:28 am
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Part Number:AWR1642BOOST

Tool/software: Linux

Hi,

I'm handling the AWR1642 ROS package. I tried to echo the data from publisher out, and I received the data in the following format:

header:
  seq: 948
  stamp:
    secs: 0
    nsecs:         0
  frame_id: "base_radar_link"
height: 1
width: 71
fields:
  -
    name: "x"
    offset: 0
    datatype: 7
    count: 1
  -
    name: "y"
    offset: 4
    datatype: 7
    count: 1
  -
    name: "z"
    offset: 8
    datatype: 7
    count: 1
  -
    name: "intensity"
    offset: 16
    datatype: 7
    count: 1
is_bigendian: False
point_step: 32
row_step: 2272
data: [0, 0, 64, 60, 0, 0, 48, 61, 0, 0, 0, 0... (lots of data here)]

is_dense: True

I am wondering how the data is packed in the "data" list? Also, is there a way to get the position of objects easily?

Best regards.

Gelei

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CC2530: issue factory reset command to router from coordinator(ZNP)

March 28, 2018, 1:30 am
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Part Number:CC2530

Hi,

My setup include a coordinator and a router that working without any issue. coordinator(ZNP) is controlled by the host linux device.

Now i need to reset router to factory default using a command from coordinator.

How can this be done? what command shall i use? 

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TDA2P-ACD: UYVY 10bit support in csi2CalMultiCam_View usecase

March 28, 2018, 1:32 am
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Part Number:TDA2P-ACD

Hi,

I'm currently using 2MP camera sensor for csi2CalMultiCam_View usecase (in VisionSDK3.2).

The YUV stream format from the sensor is like below - each components have 10 bits:

To support this stream, I changed inCsi2DataFormat to VPS_ISS_CAL_CSI2_YUV422_10B (0x1F) and extract type to VPS_ISS_CAL_PIX_EXRCT_B10_MIPI but I'm not getting correct image (all greeny image).

Do I need to change other things to get the correct image from the stream above?

When we change the camera sensor to use 8 bits (instead of 10 bits) we can see the image correctly.

Regards,

James

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ADS8556: Difference for manufacture process between ADS8558

March 28, 2018, 1:36 am
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Part Number:ADS8556

Please let me confirm about difference between ADS8556 and ADS8558.

I think that ADS855x series is nearly function and the same manufacture process (and reliability), is it correct?

（Resolution and clock, etc are only differ）

※Background

Customer is already using ADS8558, and they want to use ADS8556 for next.

If ADS855x series is the same process, they can use and register ADS8556 very easily by their internal circumstance.

Best regards,

Satoshi

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MSP-EXP432P401R: Launchpad is not detected

March 28, 2018, 1:38 am
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Part Number:MSP-EXP432P401R

Dear Sir/ Ma'am,

I have recently purchased MSP432P401R launchpad. But as soon as i connected it to my laptop. It haven't recognised in COM port but it showed as Stellaris Device Firmware Upgrade.

I have gone through some of post related to same issue. I came to conclusion that there is issue with firmware itself.

If i need to upgrade its firmware. Can i do it with LM Flash Programmer? (If yes, please include steps also because i have never used LM Flash Programmer before.)

Please provide some solution for this.

Thank you for your time. I really appreciate it.

Regards

Anurag Tamboli

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BQ25896: 9.2.9.3 Interrupt to Host (INT)

March 28, 2018, 1:39 am
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Part Number:BQ25896

Hi all

Would you mind if we ask BQ25896?

There is the description 9.2.9.3 Interrupt to Host (INT) on the datasheet P25.
We would like to confirm it.

<The description>
When a fault occurs, the charger device sends out INT and keeps the fault state in REG0C until the host reads the fault register.
Before the host reads REG0C and all the faults are cleared, the charger device would not send any INT upon new faults.
To read the current fault status, the host has to read REG0C two times consecutively.
The 1st read reports the pre-existing fault register status and the 2nd read reports the current fault register status.

->As the conclusion, are following contents correct?
   1st read : To read the pre-existing fault  
   2nd read : To read the current fault 

And if the host has to read REG0C three times consecutively, 1st and 3rd reads are the pre-existing fault, 2nd read is the current fault. 
Is our recognition correct?

Kind regards,

Hirotaka Matsumoto

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THS3491: THS3491 part availability

March 28, 2018, 1:41 am
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Part Number:THS3491

Hello,

any news about the release date and lead time for THS3491?

Best regards

Michele

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SM470R1B1M-HT: Drawing of the package carrier

March 28, 2018, 1:42 am
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Part Number:SM470R1B1M-HT

Is there a way to obtain the drawing of the package carrier that TI use to supply SM470R1B1MHFQS part (package carrier used to protect the legs in shipment)?

Thanks,

Miloš 

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CC2541: Readable/writeble characteristic properties change in simplebleperipheral app

March 28, 2018, 1:53 am
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Part Number:CC2541

Hi all,

developing on simple ble peripheral app using cc2541 i wish to modify the Char 3 making it readble as well as writable (like CHAR 1). By default it is only writable.

So in the simpleGATTprofile.c routine i modified the code as below, but testing it with btool and trying to read the characteristic value through the corresponding handle (0x002B for CHAR 3) still i have the error "THE ATTRIBUTE CANNOT BE READ".

Any suggest?

Thanks,

Vito

// Simple Profile Characteristic 3 Properties
static uint8 simpleProfileChar3Props = GATT_PROP_READ | GATT_PROP_WRITE;

// Characteristic 3 Declaration
{
{ ATT_BT_UUID_SIZE, characterUUID },
GATT_PERMIT_READ,
0,
&simpleProfileChar3Props
},

// Characteristic Value 3
{
{ ATT_BT_UUID_SIZE, simpleProfilechar3UUID },
//GATT_PERMIT_WRITE,
  GATT_PERMIT_READ | GATT_PERMIT_WRITE,
0,
&simpleProfileChar3
},

// Characteristic 3 User Description
{
{ ATT_BT_UUID_SIZE, charUserDescUUID },
GATT_PERMIT_READ,
0,
simpleProfileChar3UserDesp
},

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TPS2544: TPS2544 Wake up fail issue

March 28, 2018, 1:54 am
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Part Number:TPS2544

Hi expert,

My customer is facing an issue which is related to wake up event of TPS2544. Please kindly see below waveform for successfully wake-up(left)/fail wake-up(right) event. We used the same mouse and PC to test. For the failure wake-up event, VBUS drops and D+ drop. And D+/D- will keep both high so that host cannot know that device is plugged in.

Could you kindly help to verify why this event would be like this? Thanks a lot!!

Best regards,

Ann Lien

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CCS/TMS570LS3137: TMS570 Using GCC compiler which comes with Code Composer Studio

March 28, 2018, 1:56 am
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Part Number:TMS570LS3137

Tool/software: Code Composer Studio

Is it possible to use the GCC compiler that comes with Code Composer Studio for the TMS570? It seems that all the libraries provided are for Little Endian and therefore do not link.

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LMK00105: About a weak internal biasing on the CLKin

March 28, 2018, 1:58 am
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Part Number:LMK00105

Hi,

Please let me know the value of input impedance on the CLKin. I'd like to estimate the measurement error for probing.

Best Regards,

Toshiyuki

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Linux/AM5728: SATA boot

March 28, 2018, 1:59 am
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Part Number:AM5728

Tool/software: Linux

Hi TI,

When I try to do boot from mSATA,

I observed, After power on the board(AM5728 evm) nothing is displaying on the GTKterm.

H/W selection:
1. Sata selection J1 connected
2. Boot from sata, jumper settings: J3(1-2), J4(2-3),J5(2-3).
3. short J5

4. disk info:
fdisk -l /dev/sda
Disk /dev/sda: 29.5 GiB, 31671156224 bytes, 61857727 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x1eb46c48

Device     Boot   Start      End  Sectors  Size Id Type
/dev/sda1  *       2048  1050623  1048576  512M  c W95 FAT32 (LBA)
/dev/sda2       1050624 61857726 60807103   29G 83 Linux


5. Copied required images into boot partition:
root@am57xx-evm:/run/media/sda1# ls
MLO                 u-boot.img          uEnv.txt            ws-calibrate.rules

The above files copied from working sd images.

Please suggest if am missing anything.

Thanks,

Anil

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Linux/AM3351: System performance

March 28, 2018, 2:04 am
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Part Number:AM3351

Tool/software: Linux

Hi, i am using am3351 processor, ti=processor-sdk-04.01.00.06 sdk.

my system performance is slow. i want to increase  DDR performance, throughput and CPU speed.

Please let me know how to do this.

thank you.

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