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BQ28Z610: the voltage and waveform of SCL,SDA when I2C

March 27, 2018, 9:10 pm
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Part Number:BQ28Z610

Hello!

I find the SDA waveform is different from the datasheet use the BQ28z610 with I2C, it's neither square wave, nor trapezoidal wave. I measure there's step on the square wave, the step voltage is 1.8V, and the Vpeak is 3.3V. so is the wave right ??

Below attachment for BQ28Z610, BQ27542, BQ78Z100's the oscilloscope waveforms of detected, when separately connects the EV2300 for I2C communications.  please make sure why the BQ28Z610 generates about 1.8V step, other two without this kind of situation.
Note: the CH1 channels for SCL, CH2 for SDA;

1. BQ78Z100's SCL ,SDA wave:

2. BQ27542's SCL, SDA wave:

3. BQ28Z610's wave: the first is 8V cell, the second is 6V cell.

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TPS65086: TI PMIC or ref Design for Xilinx Zynq UltraScale+ XCZU17EG platform

March 27, 2018, 9:19 pm
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Part Number:TPS65086

Hi Sir,

Does TI have PMIC or ref Design for Xilinx Zynq UltraScale+ XCZU17EG platform?

We only fount out the PMP12004-HE support XCZU15EG.

Hugo 

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TM4C123GE6PM: Using GPIOAFSEL and GPIOPCTL to enable PWM on PortC in a Tivaware way...

March 27, 2018, 9:19 pm
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Part Number:TM4C123GE6PM

I am trying to enable PWM using PC4/5.  I understand from the documentation that I must set PMC field and possibly GPIOAFSEL to enable these pins.  I cannot find a syntax example to make this possible.  Can somebody please provide some assistance on how to write to these registers?

I have left out the portion of setting up the PWM clock.  The code worked until I tried to move it to different pins.

Thanks in advance for any help.

SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);  //PWM
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);  //PWM
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);  //GPIO

/*
* Left motor
*/
GPIOPinTypePWM(GPIO_PORTC_BASE, GPIO_PIN_4);
GPIOPinConfigure(GPIO_PC4_M0PWM6);

/*
* right motor
*/
GPIOPinTypePWM(GPIO_PORTC_BASE, GPIO_PIN_5); //pin1 = left motor, pin2 = right motor
GPIOPinConfigure(GPIO_PC5_M0PWM7);

PWMGenConfigure(PWM0_BASE, PWM_GEN_3, PWM_GEN_MODE_DOWN);


/*
* left motor
*/
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_6, 0);  // no motor speed
PWMOutputState(PWM0_BASE, PWM_OUT_6_BIT, true);

/*
* right motor
*/
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_7, 0);  // no motor speed
PWMOutputState(PWM0_BASE, PWM_OUT_7_BIT, true);

PWMGenEnable(PWM0_BASE, PWM_GEN_3);


PWMPulseWidthSet(PWM0_BASE, motor, 50 * ui32Load / 1000 );

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MSP430F6659: UART BSL

March 27, 2018, 9:34 pm
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Part Number:MSP430F6659

Hello,

i want to use UART BSL in MSP 430f6659 device. I have done already it in msp430f149 device successfully using hardware shown in slau319.

1 . Can i use same BSL hardware as use in msp430f149.

2. If Modification required please explain in detail.

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DAC8760: Hi, When I apply digital (5V) and analog voltage (Dual +- 15V) IC start to heat. Please help me to work out DAC.

March 27, 2018, 9:40 pm
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(Please visit the site to view this file)Part Number:DAC8760

Hi, When I apply digital (5V) and analog voltage (Dual +- 15V) IC start to heat, if disconnect the analog voltage, still digital supply connected no heat produce from IC.

No 5V at REFOUT  pin, I short REFIN and REFOUT as per development board, for Internal Reference Voltage, when I connected analog single supply 24V.

I Connected 0.1uF instead of 0.0022uF or 22nF at Hart pin with GND, Its Okay.

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open frame pcb size or mechanical design

March 27, 2018, 9:44 pm
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Dear TI

Ask for the standard for the size or mechanical size of the pcb.

There are open frame power products among TI products. There are also products made of small block pcbs.

I want to implement small power supplies, gate drivers and sensor circuits with small regular pcb(s).

Is there any standard information about the size of the pcb that is used as standard by the TI or othervendor?

For example. The size and position of the pin, and the height of the area of the pcb.

I am already modularizing various devices in university lab. However, as the number of types increases, we are considering standard design methods.

Even if there is no standard information, I would like to hear from those who plan to modularize the product in a similar way or TI.

for my some examples(I design various type of module pcbs)

Thanks TI

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TLV755P: Gain margin and phase margin

March 27, 2018, 10:02 pm
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Part Number:TLV755P

Hi Sir,

My customer is asking if we could provide the Gain margin and phase margin test result with TLV75510?

Many thanks,

Patrick

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DS125MB203: request reference schematic

March 27, 2018, 10:04 pm
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Part Number:DS125MB203

Hi,

I would like to draw schematic with using TI's MUX DS125MB203, but cannot find any usable circuits for reference.

In case of other TI's devices, they have EVM with schematic or support WEBENCH schematic.

However DS125MB203 has no EVM and WEBENCH simulation doesn't show any schematic.

I failed to search any user guide or application note for this device at TI webpage also.

Please share some documents to draw schematic with DS125MB203.

thanks,

TS

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LM339: LMx39x, LM2901xx Quad Differential Comparators

March 27, 2018, 10:09 pm
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Part Number:LM339

Hi,

We have selected LM339 for our application. The frequency of operation for the application is in MHz. (ranging from 1MHz-5MHz). Will the comparator work in these frequency ranges. 

Thank You in advance

Chaithra

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CC3200: Webserver

March 27, 2018, 10:17 pm
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Part Number:CC3200

Hi guys,

I just had my cc3200 and im starting to like it. My question is, the out of the box demo that shows how to connect to the cc3200 as an AP. How do I modify these html pages so I can customize it for my needs? Thanks in advance. Cheers!

Paul

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TLV320AIC3254: Voice Acitivity Detector (VAD) to GPIO

March 27, 2018, 10:24 pm
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Part Number:TLV320AIC3254

Hi folks,

I would like to Voice Activity Detector and route it to GPIO.

I configure it by GDE as attached file but I couldn't measure high-low change on GPIO(TP24) of TLV320AIC3254EVM-K.

What settings did I miss? 

(Please visit the site to view this file)

Regards,

Will Liu

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CC2630: SPI Communication in Senosr controller

March 27, 2018, 10:34 pm
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Part Number:CC2630

Hi,

I was going through the Sensor Controller Studio Documents regarding SPI Interface.

Actually, I wanted to configure the Sensor Controller and have few questions regarding the same:

1. We have done a Program for SPI Communication with ARM CPU. I want to capture data from the SPI Interface which is sending to ARM CPU.

2. There is no demo example for SPI interface and also no dedicated IO mapping in Sensor Controller studio. We are using smartnrf06 -cc2650 Development kit

3. In the "Help Viewer", "System CPU Communication: Multi-Buffered Output Data Exchange" section, it is mentioned that:

The number of output data structure buffers can be configured between 2 and 256. The resource should only be enabled when required since it increases memory usage and also adds overhead when accessing output data structure variables.   But it is not mentioned that how many bytes of data can be stored. So can you please let me know the size of the data structure buffer?

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CC2541: how GATT services are setup in central device which acts as gatt client

March 27, 2018, 10:53 pm
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Part Number:CC2541

hi,

I am using SimplBleCentral project in cc2541 keyfob,which acts as the central and i connected it with a custom keypad running with altered HidEmukbd project. 

Inside GAP_LINK_ESTABLISHED_EVENT, there is a osal timer code: - osal_start_timerEx( simpleBLETaskId, START_DISCOVERY_EVT, DEFAULT_SVC_DISCOVERY_DELAY ), whta is the  use of it?

after connecting to the device, how can i start listening to notifications send from the gatt server?

Also when does START_DISCOVERY_EVT happens?

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CCS/TMS320VC5510A: How to configure the stack mode for C55x with GEL?

March 27, 2018, 10:53 pm
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Part Number:TMS320VC5510A

Tool/software: Code Composer Studio

Hello：

The C55x has two stack mode, fast and slow.

Normally, set the mode with assembly, ".ivec _c_int00,USE_RETA"

But, if we debug code with CCS in RAM. The statement won't execute. So how to set stack mode with GEL file? By set registers?

Thanks.

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OPT3001-Q1: Supply Current vs I2C Frequency

March 27, 2018, 10:54 pm
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Part Number:OPT3001-Q1

Hello,

Would you please let me know more about  "Figure 18. Supply Current vs Continuous I2C Frequency"?

It does not seem the device is doing I2C communication, but only receiving series of pulse to SCL and SDA. (No output form the IC.)

Can I think the actual current consumption is lower than described in this figure when the frequency is the same?

Thanks.

Regards,

Oguri (TIJ automotive FAE)

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CC2650: Connection to smartphones

March 27, 2018, 10:57 pm
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Part Number:CC2650

I'm developing on the CC2650LP, using the sample project spp_ble_server as a base.

What I would like to implement, is to have the launchpad connect/reconnect to only the first smartphone that successfully bonds with it. It should also clear all bonds upon powering up. In the app, I have added a bond state callback function, changed the gapbond pairing mode to GAPBOND_PAIRING_MODE_INITIATE, and some code which executes after a bond is saved.

The code is simply getting the connected BD_ADDR and adding it to the whitelist, and subsequently changing the filter policy to GAP_FILTER_POLICY_WHITE. However, my android smartphone running nRF Connect/BLE Scanner(bonded to the launchpad) is unable to re-establish a connection to the launchpad after disconnecting. I have noticed that after a while, my smartphone stops receiving advertisements packets from the peripheral, which seems to suggest that the RPA has changed and the original address was not resolved.  

This brings me to a couple questions:

1)  I understand that you have to enable the Privacy 1.2 features to resolve a peer address into an identity address, which can then be added to the whitelist. I have looked through the code and it seems that it is all already handled in the stack. So, if I wanted to whitelist the bonded smartphone, all I have to do is to call GAPRole_GetParameter to find GAPROLE_CONN_BD_ADDR, and add that address to the whitelist? Is the peer address obtained this way the resolved peer address, or the non-resolved address?

2) After the connection is terminated, via timeout or otherwise, is it possible for a peripheral to reconnect to the bonded device when it is back within range? I have tried using low duty cycle directed advertising, and while my smartphone did receive the directed advertisement, it did not initiate pairing nor was I able to reconnect with the launchpad manually. I am not sure if this reconnection feature is simpler to implement on the central side(android) or the server side(CC2650), but ideally I would like to implement it on the launchpad.



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TPS5124: TPS5124DBTR

March 27, 2018, 9:52 pm
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Part Number:TPS5124

This is Shruti from Flex, currently we are working with the manufacturing plant located in Penang to collect the Tape Packaging information and Orientation for the components.

The end customer for this project is Juniper

MPN:TPS512DBTR

Please provide us the Tape and reel information like Tape Pitch (distance between two components) ,Tape Width and Pin-1 Orientation on tape.

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CCS/CC2650: How to connect CC2650 LaunchPad and CC2650 BoosterPack (with MSP432P401R)

March 27, 2018, 9:53 pm
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Part Number:CC2650

Tool/software: Code Composer Studio

Hi TI,

I am developing a robotic system. The robot is controlled by MSP-EXP432P401R , and I would like to send robot data to my laptop through BLE.

I was able to make a CC2650 LaunchPad become a central or client and make another CC2650 LaunchPad become a peripheral / server device using the following code examples.

https://github.com/ti-simplelink/ble_examples/blob/ble_examples-2.2/docs/multi_role.md

I can connect two CC2650 LaunchPad through BLE. However, I cannot connect between CC2650 BoosterPack (BP) (with MSP432P401R) and CC2650 LaunchPad (LP).

I am using the Project Zero for CC2650 BoosterPack + MSP432P401R to use CC2650 BP as a server. I saw two BLE addresses from CC2650 BP and CC2650 LP on my cell phone and can connect each of  them to my cell phone, but  when I scan CC2650 BP  BLE from CC2650 LP, the PuTTY just shows "Found Device 0."

I wonder where I should change in the CCS codes so that I can connect CC2650 LaunchPad and CC2650 BoosterPack?

One more question is whether I could use CC2650 BoosterPack connected to XDS110 through JTAG as a  CC2650 LaunchPad? It seems to me that two right and left switches on MSP-EXP432P401R cannot work as they do in the CC2650 LaunchPad.

Thank you so much for your support!

Best regards,

Son

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BQ76PL455EVM: Battery Management - Monitors, Protectors, Authentication and ID Forum

March 27, 2018, 9:56 pm
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Part Number:BQ76PL455EVM

Hi,

My BQ76PL455EVM was working just fine until yesterday, but now its not waking up, the power led is not lighting and with the GUI I'm getting  "Unable to open com Port" message. 

I have checked with the FTDI settings but it hasn't helped.

The test point voltages are:

VIO  = 5.03V

VDIG = 0V

V5VAO = 4.73V

TX = 4.95V

RX = 5V

TOP = 32.7V 

WAKEUP : 0.144V

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BQ24133: BQ24133 Charging issue

March 27, 2018, 10:59 pm
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Part Number:BQ24133

Hi Sirs,

When our robot system is power on, it drains to much current from the battery (almost 40A, see below diagram). So BQ24133 is short circuit and end latched off.

If we  lower the draining current, we won't find this issue while we don't want to change our HW design now since we are really close to MP.

Does TI have any method can solve this issue except removing adapter then plug again? Thanks!

 

 


 


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