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CCS/TLV320AIC3254: Calculating biquad coeffients for Purepath studio GDE

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Part Number:TLV320AIC3254

Tool/software: Code Composer Studio

Hi there

How can I calculate the biquad coefficients for the Biquid filters in GDE without using the Biquad filter design tool?

I have tried using the formula from the Ti app note SLAA447 which match the Ti TIBQ application. However, these seem to produce different results to the Biquad filter design tool. 

EG. 44100Hz sample rate. 

PEQ

1000Hz

Q=2 (BW=500Hz)

Gain = -3db

GUI gives me this:

b00.9899508950x7EB6B6
b1-0.9558080430x85A815
b20.941232920x787A52
a10.9558080430x7A57EB
a2-0.9311839340x88CEF7

TIBQ and my calulations get this:

b00.9860040x7E3560
b1-0.942430x875E6F
b20.9181510x7585FA
a10.9424310x78A191
a2-0.904160x8C44A4

The two sets of coefficients don't seem to match up. Can you explain? 

Is there any app note or documentation to assist with this? 

Many thanks

David


CC1200: CC1200 calibration

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Part Number:CC1200

Hello,

I have some questions about CC1200's FS calibration.

1) Will affect results of the FS calibration if some strong RF signal (~200kHz away) is present on PCB?

2) What registers should be saved after calibration in order to save time and reuse them, manual says FS_CHP, FS_VCO4, and FS_VCO2? Is it complete set of registers for using this frequency next time?

Thanks,

Alex 

THS7530: Driving the Gain Setting Input In Double Ended supply

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Part Number:THS7530

I would like to use this part the Vcom at 0V. I'm using a +/-2V power supply. 

What will be the VG- Referenced to? Will the voltage range still be 0 to 0.9V in this case?

Thank you,

LP2985A: LP2985 is Not Working

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Part Number:LP2985A

I am using a 3.3V fixed version of the LP2985A IC with +12V at the input. The load is less than 10 mA. However, the regulator produces over 9 V at the output for some reason. Please see my schematic below:

What am I doing wrong?

Thanks,

/Mikhail

CCS/SIMPLELINK-CC26X2-SDK: How to specify that Extended Inquire Response data is required

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Part Number:SIMPLELINK-CC26X2-SDK

Tool/software: Code Composer Studio

Hello

Im trying out the simple_central example in simplelink_cc26x2_sdk_2_30_00_34

The aim is to read bluetooth EIR raw data from an advertiser. So basically i just need the simple_central in observer mode.

I can discover the advertiser, and i made a copy of the data received from GapScan_getAdvReport(i, &advRpt);

Here is the srtuct:

/// Event for advertising report
typedef struct {
  /**
   * Bits 0 to 4 indicate connectable, scannable, directed, scan response, and
   * legacy respectively
   */
  uint8_t  evtType;
  /// Public, random, public ID, random ID, or anonymous
  GAP_Addr_Types_t addrType;
  /// Address of the advertising device
  uint8_t  addr[B_ADDR_LEN];
  /// PHY of the primary advertising channel
  GapScan_ScannedPhy_t primPhy;
  /// PHY of the secondary advertising channel
  GapScan_ScannedPhy_t secPhy;
  /// SID (0x00-0x0f) of the advertising PDU. 0xFF means no ADI field in the PDU
  uint8_t  advSid;
  /// -127 dBm <= TX power <= 126 dBm
  int8_t   txPower;
  /// -127 dBm <= RSSI <= 20 dBm
  int8_t   rssi;
  /// Type of TargetA address in the directed advertising PDU
  GAP_Addr_Types_t directAddrType;
  /// TargetA address
  uint8_t  directAddr[B_ADDR_LEN];
  /// Periodic advertising interval. 0 means no periodic advertising.
  uint16_t periodicAdvInt;
  /// Length of the data
  uint16_t dataLen;
  /// Pointer to advertising or scan response data
  uint8_t  *pData;
} GapScan_Evt_AdvRpt_t;

it seems that i get all the data in that struct after the "discover devices" process in serial terminal. However, i actually need Extended Inquire Response data. Is there a built-in mechanism in the simple_central code to specify to the advertiser that i need EIR?

All the useful data comes with EIR.

SN74BCT8373A: Device ID

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Part Number:SN74BCT8373A

Team, 

Does this device have a device ID with respect to the JTAG?

Regards,

Aaron

CCS/CC3120MOD: CC3120MOD

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Part Number:CC3120MOD

Tool/software: Code Composer Studio

I have host MCU STM32L151RDT6 which should control Wi-Fi chip CC3120MOD ..

Else I have STM32 Nucleo-64 development board with STM32L152RE MCU on it.

Question is: 

What is the best integrated development environment  (IDE) may be used for design this staff?

 Which IDE have the best libraries and examples for developing code for CC3120MOD   under control MCU STM32L151?

Thanks..

MSP430FR6047: Integrated vs companion chips

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Part Number:MSP430FR6047

I am designing an ultrasonic water flow meter and looking at two design choices: use the integrated MSP430 solution or a different micro with the TI ultrasound measurement chips available (for timing and pulse generation). I have a lot of platform firmware for the other micro and so want to stick with that but I am curious on the essential differences between these two approaches? Can I essentially do the same with both solutions, regarding flow measurement, just one is an integrated peripheral and one is external?

My read was that this is the case.

Thanks in advance

Andy.


DRV8711: DRV8711

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Part Number:DRV8711

Hello,

 

We have 4 BDC Motors to control. We decided to use BOOST-DRV8711 to control each 2.

 

Can we stack 2 of these BOOST-DRV8711 on top of each other and use the same MSP-EXP430G2 LaunchPad or do we have to use two LaunchPads?

 

Regards

Sam

 

 

UCC256304: Troubleshooting Initial Turn-on Failure of New Design

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Part Number:UCC256304

I'm looking for a bit of help troubleshooting a new UCC256304 dc-dc design that will not keep RVCC on and the converter will not run.

VCC comes up, and at the VCCStartSwitching point, RVCC comes up, but goes away immediately. The high-side and low-side gate signals appear for a short time (about 7 ms), but turn off. Oscilloscope traces follow:

What might cause RVCC to immediately turn off?

CCS/CC1310: Wireless configuration of CC1310 at 1.5M or 2M rate

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Part Number:CC1310

Tool/software: Code Composer Studio

Hi Dear Sir/Madam

  If I use the example rfCarrierWave in  SimpleLink CC13x0 SDK - V:2.30.00.20  with CC1310 LauchPad ,how to test 1.5M rate, 2M rate, or 4M rate? 

Could you give me the  test example with code in detail?

 Thanks  a lot!

MSP432P401R: VL6180X Proximity Sensor I2C Problem

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Part Number:MSP432P401R

Hi all,

I am attempting to interface my MSP432P401R MCU with a VL6180X proximity sensor on a breakout board purchased from Adafruit. I have gotten it working with an Arduino and the library provided by Adafruit. When I attempt to use the sensor with the MSP432, I can read the registers using I2C. However, I am encountering an error with the sensor that says I have a "VCSEL Continuity Error". I am not sure what this means, but because I am able to successfully read the registers from the sensor, I have to assume that I am having issues writing to the registers on the sensor. Does anyone have experience with this particular sensor?

Linux/SN65DSI84: Only half of the screen shows up

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Part Number:SN65DSI84

Tool/software: Linux

Parameters of the panel:

Resolution: 1600x1200

Vertical Period: 1233

V-Blanking: 33

Horizontal Period: 880

H-Blanking: 80

Panel clock: 65.125Mhz

Test pattern shows normally but only half of the screen shows up in non-test mode.

In addition, nothing shows up if the 0x20 and 0x21 registers are set to 1600 in non-test mode, the half screen is seen when 0x20 and 0x21 registers are set to 800.

Attached are the DSI status and CSR files generated by the DSI Tuner V2.0.

What are not set properly?

(Please visit the site to view this file)

Linux/DRA75P: Android: J6EVM5777: How to enter recovery from the uboot?

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Part Number:DRA75P

Tool/software:Android->u-boot->recovery

Hi,TI.The board I used is j6evm5777 board,and cpu is dra752-GP.Besides,the code source is 6ao1.1.

I want to enter the recovery mode from the u-boot,and I find that changing the bootenv variate reboot_img to  "recovery" can enter to the recovery mode from the website processors.wiki.ti.com/.../6AO.1.1_Application_Notes.And I do it.At the first time to get into the uboot,I input the printenv to check the bootenv ,the reboot_img variate is boot.

So I change it by inputting the command "setenv reboot_img recovery;saveenv;",and reboot by the power.I can't enter the recovery mode too.And I check that the reboot_img variate is recovery.

So I have the confuse about it .Plz help me to solve it.Thank you!

TDA2: Configuring First and Second Level MMU Tables

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Part Number:TDA2

Hello,

We're working with the TDA2x and currently using starterware_01_05_xx_xx. We want to configure the two A15 MMUs to manage different sections of DDR with different rules. Our goal is to have both A15 cores run in parallel and use cache for their instructions but not use cache for data. Both A15 cores can access each other's data space and so we want to disable cache for data spaces so that all updates are made directly to DDR. We understand this is achievable through the use of MMU descriptor tables. 

If that's correct then we'd like to configure the MMU to place all instructions into one section of DDR and place all variables in other sections of DDR. We have examples available to us both in the latest PDK and older starterware examples but these examples only cover First-Level descriptor tables. Since these tables span a large range they don't provide the granularity to do what we need. Second-level descriptor tables seem to be what we need but we can't find any examples on how to program them using starterware or PDK functions. Can you provide any examples on how to achieve the following layout assignment for DDR?

0x8000.0000 - 0x85FF.FFFF                     - Instructions 1 for A15_0

0x8600.0000 - 0x86FF.FFFF                     - variable section 1 for A15_0

0x8700.0000 - 0x8AFF.FFFF                     - Instructions 2 for A15_1

0x8B00.0000 - 0x8FFF.FFFF                     - variable section 2 for A15_1

We're primarily working with starterware_01_05_xx_xx package and would prefer examples that use the functions available to that package. Any examples would be greatly appreciated. 

Thank you.


UCC28251: Packing and schematic library pin confuse

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Part Number:UCC28251

Hi Ti engineers,

I found a very serious problem.Packaging and schematic mismatch.The schematic library pin of PW-20 on the official website is actually QFN-20.The schematic Library of the two packages is confused.

Please confirm if this is the case.Please deal with this situation as soon as possible so that I can modify PCB.

www.ti.com.cn/.../pinout-quality

Regars,

shaowei.

CCS: XDS100v3 AM3358 CCS 5.5

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Tool/software: Code Composer Studio

I Want to connect am3358 and xds100V3  ,how should i do ,  when i point connect target  the ccs5.5 reveal error 

CCS/CCSTUDIO: CCSV8 can't change the executable output file type

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Part Number:CCSTUDIO

Tool/software: Code Composer Studio

Hi ALL;

 now I use the CCSV8 to develop the cc2640r2f,I find out a question that the executable output file can't be configured,and only output file type is *.out,I want to configue the output file type to *.hex,but I can't ;

 I want to know if the CCSV8 don't support other types output file.

the setting :

project->properties-general->project->output type;however the output type is executable

TPS54335A: Please help me why TPS54335A is burned.

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Part Number:TPS54335A

My customer uses TPS54335A as their DC- DC source for their LCD product.

Vin is between 8V- 28V, the designed Vout is 5V, 3A. In fact, their output current is just 800mA. When the power is on, 10 of their 2000 board is burned, which happened at the TPS54335A part. 

The main difference between their design and the Webench design is their switch frequency is 1.4MHz.

Their schematic diagram is as follows.

And their PCB diagram is as follows. The PCB is a four layer  board.

Can you give me some advice for this TPS54335A burned case?  What else material should I offer? If have any, please tell me.

Thanks!

Linux/INA260: Device tree entry support

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Part Number:INA260

Tool/software: Linux

Hello:

We are using INA260 in our custom design board. I have got the following module to enable in my Kernel configuration.

CONFIG_PACKAGE_kmod-hwmon-ina2xx:  
│  
│ Kernel module for ina2xx dc current monitor chips  
│  
│  
│ 
│ Symbol: PACKAGE_kmod-hwmon-ina2xx [=y]
│ Type : tristate 
│ Prompt: kmod-hwmon-ina2xx.............................. INA2XX monitoring support 
│ Location:
│ -> Kernel modules
│ -> Hardware Monitoring Support
│ -> kmod-hwmon-core.............................. Hardware monitoring support (PACKAGE_kmod-hwmon-core [=y]) 
│ Defined at tmp/.config-package.in:9152
│ Depends on: PACKAGE_kmod-hwmon-core [=y]
│ Selects: PACKAGE_kmod-i2c-core [=y] && PACKAGE_kmod-regmap [=n]

&i2c1 {
  clock-frequency = <100000>;
  pinctrl-names = "default";
  pinctrl-0 = <&pinctrl_i2c1>;
  status = "okay";

  ina260 {
    compatible = "ti,ina230";
    reg = <0x4e>;
    shunt-resistor = <10000>;
  };
};

Am I missing any DTS entry for current sense trip? or how do I assign the same?

We have to measure the power draw on the USB port, hence the Alert output from INA260 is connected to a GPIO. I believe we have to define the GPIO entry in the above structure.

Appreciate your support

Regards,

Waman Prabhu

Methode Electronics.

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