Part Number: UCD3138PFCEVM-026
Tool/software: Code Composer Studio
What are the source of 4 and 20 in the following codes?
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CCS/UCD3138PFCEVM-026: PWR026_PFC
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CCS/UCD3138PFCEVM-026: PWR026_PFC
Part Number: UCD3138PFCEVM-026
Tool/software: Code Composer Studio
What does the 'coefficient set A' mean ?
Which coefficient does it correspond to?
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ADS7952: ADS7952 Flag Status
Part Number: ADS7952
Hello,
Sorry if this question is quite rudimentary, but if you are using the ADS7952 and wish to use the High and Low alarm related GPIO's, what external components do you attach to these pins? The pin can go high and low, so does that mean you just put a resistor to gnd on both pins (ensuring the 10ma spec isn't surpassed), and that the pin voltage is held (for example) at 2.5VDC, so that a high is 5VDC and a low is around GND?
Cheers
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TPS92692-Q1: Doubt on circuit layout
Part Number: TPS92692-Q1
We set up the following circuit and when we went testing it didn't work. GATE output is always low. Do you see any problem with the circuit layout?
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TLV755P: 3.3V SUPER CAP Backup Circuit Problem
Part Number: TLV755P
Hi All,
I have a strange problem when using the TLV755P as a brownout 3.3V backup supply. Please refer to the schematic below.
The 3.3V circuit should draw about 100mA in normal operation. The backup circuit is fed from C114 a 5F super cap. To test the circuit, I have disabled the normal 3.3V primary supply. On power-up, the super cap slowly charges from a separate 5V supply to about 4.5V through a super barrier diode D22 in series with R163 a 20R resistor.
To prevent back feed from the normal 3.35V supply the TLV755P is fed with a second super barrier diode D23 such that Vin is about 4.4V. I have a 10UFD bypass on Vin and 1UFD on Vout right at the chip. When I power up, the output voltage rises to only 2.6V, not 3.3V as it should. At this point, Vin is 4.4V and drawing only a few mA. The device remains cool. If I jumper from 5V directly to Vin the output does go to 3.3V. If I then remove the jumper it immediately drops back to 2.5V again. So, it is not a start-up problem. It does not work if there is even one super barrier diode in the circuit i.e. jumpering D22 or D23 does nothing. I have tried different bypass values and different TLV chips with no effect.
I realize that under full load the 20-ohm resistor would be a problem, dropping 2 volts at 100mA. But remember the super cap will charge all the way to 5V with no backup supply load in normal operation.
Thanks in advance fo any ideas to solve this.
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LM3424BKBSTEVAL: IS and GATE waveform when R6 is removed
Part Number: LM3424BKBSTEVAL
Hi team,
I did an experiment using LM3424 buck-boost EVM that I removed R6 and then test the GATE and IS waveform. Power on and I found that IS and GATE has the same peak value(nearly 6.9V, equal to VCC) and frequency, their waveform are basically the same.
What I want to know is: Why the IS voltage will be the same with GATE voltagewhen the NMOS is turned on, rather than VIN after I remove R6?
Thank you
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Compiler/TMS320F28379D: Sys/bios and C++ with app.cfg not changing clock frequency
Part Number: TMS320F28379D
Tool/software: TI C/C++ Compiler
Hello,
I am currently creating my project within the sys/bios typical template and I wanted to do the programming with C++
I have been having issues with the app.cfg file not correctly working. I had to add extern "C" to the tasks I create
also the system clock in the boot menu is just at 2.5MHZ instead of the specified 200Mhz, I am viewing this from the PWM frequency that I am getting. 40Hz with counter 2^16
How can I get the app.cfg file to work with C++ compilation.
If I manually change the clock frequency in .c will this mess with the sys/bios.
Am I going to run into a lot more issues with the app.cfg file if I continue using C++?
this is my app.cfg file
System.SupportProxy = SysMin;
BIOS.cpuFreq.lo = 20000000;
var task0Params = new Task.Params();
task0Params.instance.name = "task_pwm0";
Program.global.task_pwm0 = Task.create("&task_pwm0Fxn", task0Params);
var task1Params = new Task.Params();
task1Params.instance.name = "task_pwm1";
Program.global.task_pwm1 = Task.create("&task_pwm1Fxn", task1Params);
var task2Params = new Task.Params();
task2Params.instance.name = "task_ADC0";
Program.global.task_ADC0 = Task.create("&task_ADC0Fxn", task2Params);
Boot.OSCCLK = 10;
Boot.SPLLIMULT = 8;
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CCS/TMS320F28379D: The FFT ADC window applied for square wave
Part Number: TMS320F28379D
Tool/software: Code Composer Studio
Hi,
I have been trying to applied 512pt window to the 1 kHz square wave in example 2837x_RFFT_ADC_RT refer to the example rfft_adc_f32_windowed. Since I use 28379, I cannot run the example rfft_adc_f32_windowed so I just study the window code and use this code into example 2837x_RFFT_ADC_RT. Then I found the window sometimes perfectly applied to the square wave and sometimes not. I do not know why it happened.
Regards,
Karen
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CC3200: Flashing Chip With External Debugger
Part Number: CC3200
Hello,
I'm interested in flashing my CC3200 via the JTAG connection for rapid development/debugging, while also staying out of CCS.
I'm specifically using JLink to flash the board. So far what I've discovered in order to flash the .bin onto the CC3200 chip is to
1) Connect to the chip
2) Load the binary into SRAM at address 0x20004000 (as outlined in my linker file).
3) Set the program counter to jump to ResetISR (which is the entry function, as defined in my Makefile)
4) "go" and my program should start running.
So far most of it is working, but I can see that my program hangs on sl_Start when I attempt to flash the chip using the above steps. Upon reviewing other posts on the forums, it seems like there's some additional features that need to be compiled in to allow the NWP to gracefully reset when loading from the CCS debugger without power cycling the whole Launchpad board (Chapter 15 in CC3200-SDK_Release_Note.pdf). So I rebuilt the Simplelink library as NONOS_DEBUG, which should compile those options into the library, and am linking against /CC3200SDK_1.4.0/cc3200-sdk/simplelink/gcc/exe/libsimplelink_nonos_debug.a. However, it's still hanging on sl_Start.
My SPECULATION is that I'm not performing the right reset, or any reset at all from inside Segger's JLink program. They list multiple reset strategies in their guide here: 
in section 10.7.2.
Could someone give me some insight into how CCS is able to flash the chip for debug without hanging on sl_Start? Is there a better reset option that I need to select? Or am I doing something wrong, or skipping a step?
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AM5706: Sound output just after power on
Part Number: AM5706
Hi Experts,
I would like to output the sound within 1 sec just after power on.
The sound means that it uses Audio codec with the LPCM file in memory and outputs through I2S and comes from the speakers.
If there are any possible resolution, please let me know.
For example, M4 with RTOS wakes up and make the sound within 1 sec and then it switches to A15 Linux operation.
Thank you very much for your idea.
Best regards,
Hitoshi
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TMS320F280040C: InstaSPIN with two or one shunt
Part Number: TMS320F280040C
Hi Champs,
I believe that three shunt resisters utilized for the InstaSPIN FOC.
Do we have any plan to take care of two or one shunt?
The reference is LAUNCHXL-F280049C and BOOSTXL-DRV8305EVM.
Thank you for your kind check.
Best regards,
Hitoshi
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CCS/AWR1642: CCS/AWR1642
Part Number: AWR1642
Tool/software: Code Composer Studio
Hi all,
I am developing an application based on "srrdemo_16xx_/dss/mss" TI project.
I am using the DSS to make some additional computing beyond the radar processing and I want to post an event/semaphore to the MSS to get the results stored in shared L3 Memory.
Is there any way to do it?
My additional processing has a different timing than the radar frame so I cannot use the available MailBox.
Thank you,
Claudio
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LM5175: LM5175 bring-up
Part Number: LM5175
Hi Team,
Please help me with the following thing:
My customer made a design with LM5175 (Please see attached initial schematic) and now trying to bring it up.
Here are the problems:
- During steady state input LM5175 sometimes switches to a very strange working mode with resonant waveforms, voltages similar to those described here: https://e2e.ti.com/support/power-management/f/196/t/853891?tisearch=e2e-sitesearch&keymatch=lm5175. Being configured in DCM the device is always in that mode, and sometimes unable to stabilize the output voltage at all. After all of the schematic corrections (see below), the device starts from the twice lower frequency than programmed by RT/SYNC and then switches to normal while I’m increasing the input voltage. The COMP voltage remains within a range as in the Quickstart Tool Excel table and it is steady.
- Start-up from low voltage input (~6.45V) is not smooth and steady but rather oscillating. Sometimes for 20ms, sometimes for seconds. I blamed a protection circuit (U28) initially, but direct power supply connection to LM5175 input did not change a thing. Tried adding electrolytic caps (470uF) to both input and output - this reduced the symptoms of both problems but did not eliminate them at all. Moreover, I tried to connect to the same protection circuit MAX20048 and LT8390A EVBs and both start flawlessly.
They deliberately did not use electrolytic capacitors for high temperature longevity reasons. This affected the load transient response, but I’m OK with that, since afterwards I use DC/DC converters to make 4.0V and 5.0V from 9.6V.
So they made the following modifications to the initial schematic:
- Added 2.2uF to U21.VCC
- Added 1uF to U28.VCC
- Shorted U21.DITH to GND
- The R69 from 93.1K connected to GND changed to 0Ohm to VCC, also tried 200K to GND, seems to be the same as 0Ohm to VCC, CCM, no hiccup.
- Re-calculated compensation network with the help of Quickstart Tool Excel table to 1.27K/33nF/47pF instead of original 10K/22nF/100pF.
Seems that they missing something very basic with this design.
Thanks,
Shlomi
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TPS92692-Q1: Buck implementation
Part Number: TPS92692-Q1
Is there any information on how to implement and design a Buck architecture using this controller?
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MSP430F5438：使用串口连续发送1024字节数据，每到128字节后出现超时（即帧换行现象）
Part Number: MSP430F5438
波特率使用9600和4800，都是在128字节出现这样的情况。数据能能发全，但是就是隔128字节延时一下。各位前辈多指导。
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TMDX654IDKEVM: How to dynamically load and unload device tree overlays in Linux
Part Number: TMDX654IDKEVM
Hi,
How could i dynamically load and unload the device tree overlays for am65x Linux platform to configure the PRU pins?
Best Regards,
Jerry
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IWR1443: IWR1443
Part Number: IWR1443
Hi,
There are IWR1443FQAGABL available only.
Will be secure version IWR1443FQASABL released?
What is the difference between General and Secure versions?
Is there any recommendation regarding code protection in open systems like IWR1443FQAGABL available?
Regards,
Gennadii
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CCS/TMS320F28379D: initCLA1 in TMS320f28379D
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TMDSSOLARUINVKIT: Is There A 'Newer' Project Other Than V100 That's In Control Suite?
Part Number: TMDSSOLARUINVKIT
Hello,
For the
TMDSSOLARUINVKIT
is there a project that is newer or more modern vs. the one in Control Suite - Path is:
C:\ti\controlSUITE\development_kits\TMDSSOLARUINVKIT_v100 - c:\ti is root in this case.
I see there's nothing new in C2000 Ware - at least, I haven't found anything.
Thanks In Advance,
John W.
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CCS/TMS320F28335: CCS/TMS320F18335
Part Number: TMS320F28335
Tool/software: Code Composer Studio
Hi,
Controlling using two DSP (TMS320F28335) connecting to the same PC it is feasible using CCS v4.1.0 but not CCS v3.3 as stated in one of the forums. My question here, is that can be done using CCS version 9. Thanks
Hamid
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