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DRV8301-69M-KIT: Rs_online calculation

November 25, 2018, 11:43 pm
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Part Number:DRV8301-69M-KIT

Hi,

In my project I am using the Rs_Online calculation as temperature sensor for the motor. I did this as desribed in chapter 15.2 of the instaspin guide.

The problem is, that the Rs calculation doesn't seem te to trustworthy.

At times the calculation is correct and provides me with a steady and correct temperature, but the Rs value keeps spiking and dipping.

With my Rs offline begin arround 0.72 ohms, the Rs_online dips and spikes to 0.24 ohms and 1,17 ohms (resulting in -150 degrees C and + 177 degrees C). These spikes last for several seconds, so I can't filter it by taking multiple samples.

Any suggestions on how i can get a stable reading from Rs_online?

Thanks,

Alain

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Linux: Access firmware RAM

November 25, 2018, 11:48 pm
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Tool/software: Linux

Hi,

Hi,

I am using GNU Tools ARM Embedded (arm-none-eabi-gcc.exe with -march=armv7e-m) for my source code together with TI CSL drivers, I am loading the firmware via remoteproc driver in kernel.

  • IPU1 is located at 0x90000000 (32MB)
  • IPU2 is located at 0x92000000 (32MB)

I want access (read/write) from IPU1 (0x90000000) to the RAM of IPU2 (0x92000000)? Is it possible (I don't want shared RAM)?  If yes, where do I need to configure it (rsc_table, dts-file, linux driver)?

Regards,

Andreas

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CCS/CC2640R2F: Is there the ble 5 serial socket server example on simplelink sdk 2.3 ?

November 25, 2018, 11:56 pm
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Part Number:CC2640R2F

Tool/software: Code Composer Studio

board : launchxl-cc2640r2f

sdk : simplelink cc2640r2 sdk 2.30.03.05

hi

i have used an serial socket server example using ble 4.2 on ti ble github

but ble5 spp example is supported on only cc26x2r1 sdk

so could you give me a ble5 example on cc2640r2f?

Best regards.

 

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DS90UB964-Q1: DS90UB964-Q1

November 25, 2018, 11:57 pm
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Part Number:DS90UB964-Q1

Hi,

Our customer wants to transfers 8 camera streams, so he need two Ds90UB964, but the question is how to realize sync among these 8 cameras? 

Could you please give me some advice? 

Best regards

Kailyn

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TPS65910: VRTC is displayed in Power Down mode or Sleep mode.

November 26, 2018, 12:07 am
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Part Number:TPS65910

Hi

My customer is currently using the TPS65910 (MSP430FR2000).
The current circuit is running stable.
However, you want to minimize power consumption when the circuit is off.
Currently, all power except VRTC is turned off in off state as below.
Customers also want to change this VRTC to OFF. If you remove the VBAT and control the VCC voltage for this part, can you turn off the VRTC too?
Although VRTC is not available in Power Off mode
VRTC is displayed in Power Down mode or Sleep mode.

6.3.1 State-Machine
The EPC supports the following states:
Off: The main battery supply voltage is high enough to start the power-up sequence. All power supplies are in OFF state except VRTC.

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DS26C31MQML: DS26C31MW/883=5962-9163901MFA ?

November 26, 2018, 12:11 am
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Part Number:DS26C31MQML

Hello 

Im sooyeon lee working in Satrec Initative in south korea. 

There is no ordering information of SMD part number in DS26C31MW part page. 

But in the datasheet, the device marking of DS26C31MW/883 = 5962-9163901MFA.

Is it need additional option? or is it available to order  5962-9163901MFA?

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TAS5751MEVM: under voltage protection

November 26, 2018, 12:13 am
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Part Number:TAS5751MEVM

Dear all，

We have tested TAS5751M-EVM. Find that the UVL will not report error in 0X20 register. This result is not in accordance with the datasheet.

And we find that the UVL falling is 6V and UVL raising is 6.7V.  The AVDD remains 3.3V when PVDD is falling to 6V.

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Linux/DRA71: DDR allocation in Linux device tree

November 26, 2018, 12:15 am
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Part Number:DRA71

Tool/software: Linux

Below is what I allocate DDR  in device tree file:

ipu1_cma@84000000 {
compatible = "shared-dma-pool";
reg = <0x0 0x84000000 0x0 0x4000000>;
no-map;
status = "okay";
linux,phandle = <0xb7>;
phandle = <0xb7>;
};

cmem_block_mem@88000000 {
reg = <0x0 0x88000000 0x0 0xc00000>;
no-map;
status = "okay";
linux,phandle = <0x109>;
phandle = <0x109>;
};

What I want to asks is:

1, As reserved memory for IPU1, is A15 still can read/write IPU1 memory area? 

2, What cmem means, can I understand it as share memory?

3, Except Reserved memory, other memory area is used by A15?

Thanks.

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LAUNCHXL-CC26X2R1: TI GAP Role- Central + Peripheral + Observer

November 26, 2018, 12:15 am
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Part Number:LAUNCHXL-CC26X2R1

Hello All,

I was working on a project with the CC26x2R Launchpad working on the Peripheral + Observer Roles. Then I wanted to add the Central Role too. But when I included the GAP_PROFILE_CENTRAL to the existing 

GAP_DeviceInit(GAP_PROFILE_PERIPHERAL | GAP_PROFILE_OBSERVER.....), the status returned was INVALID_PARAMETER ( likely, due to the invalid role combination).

Is this to be expected, or could it be some other issue ? Also to get the functionality of  Central + Peripheral + Observer, can I just use  GAP_PROFILE_CENTRAL  |  GAP_PROFILE_PERIPHERAL , observer is basically a Central? 

Regards,

Shyam

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CCS/CC2640R2F: How to move button relevant function in SimplePeripheral project easily?

November 26, 2018, 12:15 am
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Part Number:CC2640R2F

Tool/software: Code Composer Studio

I am developing my project on the basis of SimplePeripheral, since i don't need button in my application case, so i want to move away the functions and files of the menu and button, but i find it's tightly combined with simpleperipheral.c, therefore, i want to know is there a quick way to delete menu and button relevant files? Comment every function called in simpleperipheral.c manually is so.... annoying.

Looking forward to anything helpful.

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Linux/AM4378: Fail to boot from QSPI NOR flash on AM437x starter kit after partition

November 26, 2018, 12:20 am
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Part Number:AM4378

Tool/software: Linux

Hello Sir,

I use am437x Starter Kit board and am437x-evm-linux-rt-sdk-src-05.00.00.15.tar.xz

First, I follow the below steps build u-boot and copy images to SD card.
1.make am43xx_evm_defconfig
2.make
3.Copy MLO and u-boot.img to the SD Card.
4.make distclean
5.make am43xx_evm_qspiboot_defconfig
6.make
7.Copy u-boot.bin to the SD Card. Boot the SD Card and flash u-boot.bin to the QSPI.
And modify SYSBOOT[4:0] to 11010b(UART0->SPI->QSPI->MMC1)
The am437x starter kit can run u-boot success.

And then I want to add partition into flash.
So I insert some macros into am43xx_evm.h and rebuild u-boot & flash u-boot.bin
#ifdef CONFIG_QSPI_BOOT
+ #define CONFIG_SYS_TEXT_BASE 0x30000000
+ #undef CONFIG_ENV_IS_NOWHERE
+ #define CONFIG_ENV_IS_IN_SPI_FLASH
#define CONFIG_SYS_REDUNDAND_ENVIRONMENT
#define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
#define CONFIG_ENV_SECT_SIZE (64 << 10) /* 64 KB sectors */
#define CONFIG_ENV_OFFSET 0x110000
#define CONFIG_ENV_OFFSET_REDUND 0x120000
+ #ifdef MTDIDS_DEFAULT
+ #undef MTDIDS_DEFAULT
+ #endif
+ #ifdef MTDPARTS_DEFAULT
+ #undef MTDPARTS_DEFAULT
+ #endif
+ #define MTDPARTS_DEFAULT "mtdparts=qspi.0:512k(QSPI.u-boot)," \
+ "512k(QSPI.u-boot.backup)," \
+ "512k(QSPI.u-boot-spl-os)," \
+ "64k(QSPI.u-boot-env)," \
+ "64k(QSPI.u-boot-env.backup)," \
+ "20m(QSPI.kernel)," \
+ "-(QSPI.file-system)"
#endif

Ater flash complete, I reset the Starter kit & get "CCCCCCCC" and then system hungs
Does anyone can help me to check these macros I inserted. Thanks!

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CC2564: Does TI have thermal resistance data for CC2564B QFN IC?

November 26, 2018, 12:23 am
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Part Number:CC2564

Hi,

 The CC2564BRVMT SPEC doesn't specify any thermal resistance data. Could TI provide its thermal resistance data such as Max TJ, Rθjc, ...etc for power dissipation calculation?

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AM5K2E02: Routing data through NETCP

November 26, 2018, 12:25 am
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Part Number:AM5K2E02

Hi,

I want to route data through the NETCP and avoid using any of the in built firmware.  Figure 1-1 in spruhz0 (Aug 2014) indicates that data can flow from the N-Port Ethernet Switch, through the Streaming Interface Switch, to the PKTDMA and then to the host (A-15 Core).  I have studied the user guides and example code, however, I cannot see an obvious way of doing this. Please can you clarify if this is possible and if so could you highlight an example is the MSDK where this routing is used.

A previous thread on a similar subject is unresolved. 

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LDC1101EVM: LDC1101 EVM GUI

November 26, 2018, 12:25 am
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Part Number:LDC1101EVM

Hello,

Today I got the LDC1101 EVM.

I have some question about LDC1101 EVM GUI.

1. Can I use "OneUI" for LDC1101? I installed the "OneUI" v1.9.4 but i can not see any data streaming from gui. At the bottom of GUI it displayed "Connected | SSP EVM connected - LDC1101"

2. Also I tried "LDC1101 EVM GUI(version1.0.0.6)" but  I can not connect to EVM. I also tried as an administrator but has same issue.

Please let me know how to solve these issues.

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TPS40170: OCP Design Issue

November 26, 2018, 12:28 am
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Part Number:TPS40170

We face the OCP design point issue with buck controller.

We found the measured point of OCP is NOT meeting to what we calculated. Could you advie what the problem is! Very thanks. e

(Please visit the site to view this file)Very Thanks.

Regards,

Brian

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Linux/DRA72: SDK LA next release schedule?

November 26, 2018, 12:29 am
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Part Number:DRA72

Tool/software: Linux

Dear Champs,

My customer found there has been no update in Processor SDK Linux Automotive since 3.04 - released at last Dec/2017yr.

Could you please let me know when the next version will be released?

In the next version, what is QT version will be included?

Thanks and Best Regards,

SI.

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SN65HVD234: About structure inside

November 26, 2018, 12:32 am
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Hi teams,

I have a question about SN65HVD234.

Please let me know about the follows.
The device is driving in "1" state.
I think it is in Hi-impedance, so it has driven somewhat.
In TCAN332, it is stuck on "1" state with the same circuit.
I think that the difference between these two devices is in the internal structure, is not it?
Best regards
Hayashi
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WEBENCH® Tools/MC3403: MC3403DR Output Problem

November 26, 2018, 12:38 am
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Part Number:MC3403

Tool/software: WEBENCH® Design Tools

I am trying to change my 0-2.5v  to 0-10v. Vin * (R15+R14) / R17 = Vo.  lets say Vin = 1V  --> 1 * (3k+1k) / 1k = 4V right ? but when i measure it Vo = 10v. what is wrong in here ? Thank you.

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Compiler/ADS1294R: LOFF register voltage mode and current mode difference

November 26, 2018, 12:43 am
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Part Number:ADS1294R

Tool/software: TI C/C++ Compiler

Dear   Friends 

 I have configured register LOFF as a current mode so I get the ECG waveforms but I changed pullup or pulldown resistor mode in LOFF register I didn't get the valid waveforms, sometimes lead1 data only coming 

what do I do we do for valid waveforms in pullup or pulldown resistor mode?

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Compiler/ADS1294R: LOFF register voltage mode and current mode difference

November 26, 2018, 12:44 am
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Part Number:ADS1294R

Tool/software: TI C/C++ Compiler

Dear   Friends 

 I have configured register LOFF as a current mode so I get the ECG waveforms but I changed pullup or pulldown resistor mode in LOFF register I didn't get the valid waveforms, sometimes lead1 data only coming 

what do I do for valid waveforms in pullup or pulldown resistor mode?

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