BQ25606: BQ25606: BQ25606 power-up during system load & Battery absent.

October 6, 2019, 3:42 am

≫ Next: TPA3221

≪ Previous: TDA2PXEVM: How does the TDA2PX board capture the lvds data from ub933 on TDA2HG board

Part Number: BQ25606

Dear Sir,

Refer below circuit, BQ25606 can't power up by below condition,I use EVM test same result.

Does this is normal condition?

- Battery Cell_ Absent, Vin=5V, Io=2A

Please you kindly help review & advise.

Steven

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TPA3221

October 6, 2019, 3:44 am

≫ Next: CCS/TMS570LS1224: TMS570LS1224 : L3GD20H three axis SPI Sensor

≪ Previous: BQ25606: BQ25606: BQ25606 power-up during system load & Battery absent.

Dear TI

My TPA3221 in btl mode, only one load will have a small amount of abnormal noise in the high-pitched part, detecting the waveform of the output inductor. When the treble occurs, the waveform will increase by 2V when it is relatively normal. How can I solve this problem by connecting only one output load in BTL mode?

Thank！

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CCS/TMS570LS1224: TMS570LS1224 : L3GD20H three axis SPI Sensor

October 6, 2019, 3:47 am

≫ Next: DRV8701: DRV8701 with parallel mosfet

≪ Previous: TPA3221

Part Number: TMS570LS1224

Tool/software: Code Composer Studio

could anyone help me in getting device id value which is 0xD7 from WHO_AM_I register

my halcogen configurations are enabled the SPI1 driver , check clock polarity (1)and clock phase (0) and SPI frequency is 10 MHz. (Baudrate set to 300K HZ) with charlen length 16 ,In SPI1 Port i enabled each (SIMO[0],SOMI[0],CLK and (SCS[0] ) as SPI and the others as GIO ) then i generated the code

in my code i received 0xFFFF and the oscilloscope shows SDO is always high ,i don't know why

#include "sys_common.h"

/* USER CODE BEGIN (1) */
#include "spi.h"


/* USER CODE BEGIN (2) */
uint16 TX_Data_Master[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
uint16 RX_Data_Master[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

int main(void)
{
/* USER CODE BEGIN (3) */
    spiDAT1_t dataconfig1_t;

    // The chip select signal is held continuously active during several consecutive data word transfers
    dataconfig1_t.CS_HOLD = TRUE;

    /* After a transaction, WDELAY of the corresponding data format will be loaded into the delay counter.
     No transaction will be performed until the WDELAY counter overflows. The SPISCS pins will be deactivated
     for at least (WDELAY + 2) * VCLK_Period duration. */
    dataconfig1_t.WDEL    = TRUE;

    // Data word format 0 is selected
    dataconfig1_t.DFSEL   = SPI_FMT_0;

    // Chip select number. CSNR defines the chip-select that will be activated during the data transfer (0 in our case).
    dataconfig1_t.CSNR    = 0xFE;

    spiInit();
    
    while(1)
    {
      
        TX_Data_Master[0] =0x80|0x0F;  //0x8F who_am_i address
        spiTransmitAndReceiveData(spiREG1, &dataconfig1_t, 2, TX_Data_Master, RX_Data_Master);

        printf("Device ID = %x\r\n",RX_Data_Master[1]);

      }
}

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DRV8701: DRV8701 with parallel mosfet

October 6, 2019, 3:56 am

≫ Next: LPV802: LPV802Electrochemical gas sensor RS electromagnetic interference

≪ Previous: CCS/TMS570LS1224: TMS570LS1224 : L3GD20H three axis SPI Sensor

Part Number: DRV8701

Hi,

I am using DRV8701E as gate driver to drive for CSD18510Q5B mosfet.

4 parallel mosfet in each arm of H bridge.So total 16 mosfet in H bridge.

I drive current source is set to 150mA and sink 300mA.

When there is 4 parallel mosfet in each arm of H -bridge then it raise fault indication but in 3 parallel mosfet it works finne.

Calculation- CSD18510Q5B

Qgd= 21nc.,

Isource= 150mA.

T(slew)= Qgd/Isource=(8*21nc)/150mA=1.12 uSec //For 8 mosfet slew time,4 on high side and 4 lower side

Average Current : IAVG = QG × # MOSFETs Switching × Switching Frequency

= 21 nc * 8 * 4Khz= 672 uA

All parameters are in range, still with 4 parallel mosfet it raises fault condition and works fine with 3 parallel mosfet.

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LPV802: LPV802Electrochemical gas sensor RS electromagnetic interference

October 6, 2019, 4:44 am

≫ Next: TPS61280A: TPS61280A

≪ Previous: DRV8701: DRV8701 with parallel mosfet

Part Number: LPV802

We design electrochemical gas sensor circuit using LPV802 amplifier with reference to "Comparing EMI Performance of LPV802 with Other Devices in a Gas Sensor Application"，But

we failed to solve the problem of electromagnetic interferenceWalkie-talkie （10V/m, 80MHz~1GHz）.Give me some advice，Thanks.

(Please visit the site to view this file)

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TPS61280A: TPS61280A

October 6, 2019, 5:27 am

≫ Next: TMS320F28035: Is there code for writing/reading to/from ISSI flash IS25LQ040B ?

≪ Previous: LPV802: LPV802Electrochemical gas sensor RS electromagnetic interference

Part Number: TPS61280A

Where can I find line and load transient response data for this part?

Load response I'm interested to characterise is for 40 mA/uS time response, total amount of 2A load transient.

The data found in figures 44,45 in part's datasheet is insufficient for my use case. I need general formula of mVp-p calculation per x A change at output or maybe some measurements results which are more close to my use case.

Thx in advance, Mark.

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TMS320F28035: Is there code for writing/reading to/from ISSI flash IS25LQ040B ?

October 6, 2019, 6:23 am

≫ Next: CCS/CC3220SF: cc3220sf

≪ Previous: TPS61280A: TPS61280A

Part Number: TMS320F28035

Hello,

I'm looking for code that uses SPI to write and read to/from an ISSI flash (specifically IS25LQ040B).

I have studied the code examples in the C2000Ware for SPI communication, but have not been successful in translating to writing/reading of bulk data (1000 bytes at a time).

Any ideas would be useful.

Thanks,

Mechi

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CCS/CC3220SF: cc3220sf

October 6, 2019, 7:05 am

≫ Next: AWR1443BOOST：速度解析

≪ Previous: TMS320F28035: Is there code for writing/reading to/from ISSI flash IS25LQ040B ?

Part Number: CC3220SF

Tool/software: Code Composer Studio

Hi,

my problem is that sl_task is stack after 10 min.

i test my softwre and i found that all of my tasks are blocked, by pending on q, for 1msec if the q is full and 1sec if the q is empty.

when sl_task is stack the sl_task is not running and all of the lower priority is not run.

i try to block the high priority tasks menualy when the system stack and i found that sl_task is not running as well as all of the low priority tasks (then sl_task).

all the tasks mark as ready tasks on ROV and sl_task mark as preempted.

1. i use posix API.

2. stack version simplelink_cc32xx_sdk_3_20_00_06

3. i use WIFI mode STA.

my project includes Uart and TCP protocols.

i read files from my database (simplelink file system api) by uart and wifi in the same time.

if the wifi is disabled (only reading files over the uart) the system is not stack. i read files over the uart with no problems. when the wifi is enable and i read files over tcp protocol (even if the uart is disabled) the sl_task is stack after 10min.

advice

Thanks

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AWR1443BOOST：速度解析

October 6, 2019, 7:16 am

≫ Next: TPS54386EVM: Is it possible to alter parts on this evaluation board to test for

≪ Previous: CCS/CC3220SF: cc3220sf

Part Number: AWR1443BOOST

hello

Awr1443 this development board from the uart packet how to analyze the speed of the object, doppler value is not the corresponding speed of the object?

thank you!

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TPS54386EVM: Is it possible to alter parts on this evaluation board to test for

October 6, 2019, 7:29 am

≫ Next: how to get the maximum current value of charge pump output when the IC is designed

≪ Previous: AWR1443BOOST：速度解析

Part Number: TPS54386EVM

Would I have to swap out the input caps or would there be more to it than that? Outputs of 5V and 3.3V would stay the same.

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how to get the maximum current value of charge pump output when the IC is designed

October 6, 2019, 7:50 am

≫ Next: Compiler/TMDXIDK57X-LCD: cant add probe to gstreamer

≪ Previous: TPS54386EVM: Is it possible to alter parts on this evaluation board to test for

Hi,

May I ask about how to get the maximum current value of charge pump output when the IC is designed? I find that current output capacity is far beyond the spec on the datasheet, so I wanna know how the spec of charge pump is designed when designed? Thanks!

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Compiler/TMDXIDK57X-LCD: cant add probe to gstreamer

October 6, 2019, 8:04 am

≫ Next: DRV8824: Speed and data sheet problems

≪ Previous: how to get the maximum current value of charge pump output when the IC is designed

Part Number: TMDXIDK57X-LCD

Tool/software: TI C/C++ Compiler

Hello everyone,

I am trying to add a probe to a pad in GStreamer in the following code, I can successfully compile and run the code on my vbox Ubuntu, but when I try to run it on my IDK nothing happens and LCD remains black,

#include <gst/gst.h>
#include <iostream>


static GstPadProbeReturn cb_onProbe(GstPad * Ipad , GstPadProbeInfo* Iinfo , gpointer userData ){
    std::cout << "cb\n";
}



int main(int argc , char* argv[]){

    GstElement *myPipeline, *myTextOverlay , *myVideoSrc, *myVideoSink , *myCapsFilters;
    GMainLoop * myLoop;
    GstCaps  *myCaps;
    GstPad * mySrcPad ;

    gst_init(&argc , &argv);

    myVideoSrc = gst_element_factory_make("videotestsrc", "mySrcVid");
    myVideoSink = gst_element_factory_make("autovideosink", "mySinkVid");
    myTextOverlay = gst_element_factory_make("textoverlay", "myTxtOvr");
    myCapsFilters =  gst_element_factory_make("capsfilter", "myCpsFltr");
    myPipeline = gst_pipeline_new("myPipe");

    if( !myPipeline ||  !myTextOverlay ||  !myVideoSrc || !myVideoSink || !myCapsFilters){
        std::cout << "failed to create some elements!!\n";
        return -1;
    }

    myCaps = gst_caps_new_simple("video/x-raw",
                                 "width",G_TYPE_INT, 640,
                                 "height",G_TYPE_INT, 480,
                                 "framerate",GST_TYPE_FRACTION, 1,1,
                                 NULL
                                 );
    g_object_set(G_OBJECT(myCapsFilters) , "caps" , myCaps , NULL);

    gst_bin_add_many(GST_BIN(myPipeline) , myVideoSrc ,myCapsFilters, myTextOverlay ,myVideoSink, NULL  );

    if(gst_element_link_many(myVideoSrc , myCapsFilters , myTextOverlay ,myVideoSink, NULL) != true){
        std::cout << "failed to link some elements!!\n";
        return -1;
    }

    g_object_set(myTextOverlay , "text", "my text", NULL);


    mySrcPad = gst_element_get_static_pad(myVideoSrc , "src");
    gst_pad_add_probe(mySrcPad , GST_PAD_PROBE_TYPE_BUFFER , (GstPadProbeCallback)cb_onProbe, NULL , NULL );

    GstStateChangeReturn retVal =  gst_element_set_state(myPipeline , GST_STATE_PLAYING);
    if(retVal == GST_STATE_CHANGE_FAILURE){
        std::cout << "failed to playing!\n";
        return -1;
    }



    myLoop = g_main_loop_new(NULL, false);

    std::cout << "running...\n";
    g_main_loop_run(myLoop);


    return  0;
}

even if I comment the line with gst_pad_add_probe (line 50), the program works correctly in IDK (without calling the callback function). I'm using processor sdk linux rt 4.9.

any help would be appriciated,

B.R,

Alex.

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DRV8824: Speed and data sheet problems

October 6, 2019, 8:38 am

≫ Next: BQ40Z50-R3-DEVICE-FW: RSOC Write command - 0x0079

≪ Previous: Compiler/TMDXIDK57X-LCD: cant add probe to gstreamer

Part Number: DRV8824

Dear all：

I am using DRV8824 and have the following three problems

1，In addition to the STEP foot can adjust the speed of the motor, whether there are other pins can be adjusted？

2，Set STEP [000], how many degrees to turn a STEP？

3，What to make of table 2 on data sheet page 14？

↧

BQ40Z50-R3-DEVICE-FW: RSOC Write command - 0x0079

October 6, 2019, 8:52 am

≫ Next: AWR1243BOOST: Channel-to-channel match and calibration

≪ Previous: DRV8824: Speed and data sheet problems

Part Number: BQ40Z50-R3-DEVICE-FW

I'm trying to set the RSOC value with 0x0079 command with no success.

The TRM says that 0x0079 command should be sent in order to load the desired RSOC value, but it does not mention where the desired RSOC should be written.

How this command should be used/sent by the BqStudio?

Thanks

↧

AWR1243BOOST: Channel-to-channel match and calibration

October 6, 2019, 8:55 am

≫ Next: CCS / DLPLCRC410EVM： How to use Labview to control DLP4100?

≪ Previous: BQ40Z50-R3-DEVICE-FW: RSOC Write command - 0x0079

Part Number: AWR1243BOOST

While processing data collected with an AWR1243Boost we are noticing significant differences between the outputs of TI's software and our own processing. When using TI's tools we can see outputs that match our expectations of what we should see from our data collection. In particular, it appears all four channels are coherent and approximately gain matched. However, when we re-process the recorded digital I/Q in our own tools the same data shows that the channel-to-channel phase match is approximately random and a 20 dB difference between channels. It appears the device is "coherent" when run through TI's tools but incoherent when using the raw data. It appears TI's tools are able to apply a transfer function to the raw data before processing and displaying it to correct for the errors.

A calibration data file (containing hex values) appears to have shipped with TI's software. Does this mean that the AWR1243 does not meet the phase and gain specifications w/out the calibration data contained in that file? We purchased the AWR1243 specifically because we are using custom DSP that would not be possible with TI's other devices or TI's software. How do we make use of this calibration data without having to use TI's post-processing tools? Can TI provide a method for us to interpret the data in that file and the code necessary to turn that data into the correction factors necessary to phase- and gain-match the device?

If we can't use this file, does TI have a different piece of software that would allow us to run a new calibration and derive the transfer function to correct for the phase and amplitude errors? Can we get the "corrected" I/Q data out of TI's tools so that we can process it?

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