Low Power RF & Wireless Connectivity

Forum Post: RE: Running the SSPDemo on the EZ430-RF-256X

chuck dahl1 — Fri, 24 May 2013 05:40:00 GMT

Yes, I have looked carefully at all of those links. It appears that all off the demos available for the EZ430-RF256X using the bluetopia stack require 2 of the development kits and 2 PCs. Is there any sample programs that I can run with a single PC and with what comes in the development kit (1 USB to UART bridge, and 2 target boards). i've been working on trying to establish a basic SPP connection between an Android device and the EZ430 for nearly a week. A basic working SPP example that can be run with a single development kit would be really helpful. Really, should you have to buy 2 development kits in order to run the sample programs?

Forum Post: RE: ZStack OTA CC2530 on WaveShare platform

YiKai Chen — Fri, 24 May 2013 05:17:00 GMT

If you new FW image is download successfully, you need to have an approach to notify boot loader there is a new FW download to external flash before the device restarts. In my case, I use NV RAM to notify boot loader, which means that I write a special byte to NV RAM and the boot loader reads this after the device restarts. If there exists this special byte, the boot loader will copy new FW from external flash in flash of CC2530, runs it and remove the special byte.

Forum Post: RE: CC2530 ZNP Mini Kit and SPI

YiKai Chen — Fri, 24 May 2013 05:10:00 GMT

I think the problem is that CC2530 does not use interrupt to handle SPI interface. So, you need the two extra IO MRD and SRDY to notify both host and slave that there will be data communications.

Forum Post: RE: CC2540 UART0 SPI alternative 2 location

YiKai Chen — Fri, 24 May 2013 04:57:00 GMT

For keyfob example using cma3000d, it is located in BLE-CC254x-1.3\Projects\ble\KeyFob\CC2540DB.

Forum Post: RE: Problems with Update Parameter Request and iOS

Jun Feng Hu — Fri, 24 May 2013 03:26:00 GMT

Thanks at first.

But i try 10 seconds, but fail again.

So can you try on your side and give me specific advice.

BTW: i am using iphone5 6.1.3

Please help me.

My product will enter into mass production in July

So when is your new stack released?

Forum Post: problem with CC3000, Must repatch FW and driver for new run

Vu Truong — Fri, 24 May 2013 03:19:00 GMT

Hi everybody

I'm just new in CC3000. I have complete porting driver SPI for using in LPC 1347. The behavior may be correct.

In my hardware can do all of simple feature of CC3000 . Example : Smart config ,connect to AP, Scan SSID , disconnect ... ect

But i have problems. after all of correct feature perform, my CC3000 can't do anything. My firmware in LPC1347 is not hangs in CC3000 API.

But CC3000 can't connect with every AP or scan...

I must repatch FW and Driver ... . after that, i can perform my work with my device .

I have question.

after connected to AP, i want to run smart config. A question is : do i need to perform disconnect before run smart config ?

another , when i connected to AP, i want to scan SSID : Do i need to disconnect out of AP and run API wlan_ioctl_set_scan_params() , after that perform wlan_stop and wlan_start() . What's follow work for the work ?

Forum Post: RE: Microphone on CC8520

nicola favazza — Fri, 24 May 2013 02:48:00 GMT

Hello,

can you help me with a compiled example for 2 mic stereo bias ?

Forum Post: RE: AIC3204 Microphone vs Line In

nicola favazza — Fri, 24 May 2013 02:45:00 GMT

Hi,

for 2 mic stereo bias I need resistence or can I do it by configuration ?

Is possible to have a demo example for CC85XXDK-HEADSET ?

Thank you!

Forum Post: RE: CC112x or CC1200 FCC 15.247 compliance

TA12012 — Fri, 24 May 2013 02:27:00 GMT

Anang,

Please consult this appnote, it will tell you that you might pass the 500kHz bandwidth to be able to transmit at high power, however you will not pass the 8dBm/3kHz peaking spec.

http://www.ti.com/lit/an/swra123b/swra123b.pdf

Basically the conclusion of this app note is that at <1.2kbps the best you will be able to do is 8dBm output power. The CC1200 does include some spreading function that will help a little but you will not get much more that 1-2dB from that algorithm.

In my view you have two options.

Make you system frequency hopping.
Increase the data rate to 250-500 kbps.

In either case you will break backwards compatibility.

Regards,
/TA

Forum Post: RE: Using CC2540 flash instead of RAM

YiKai Chen — Fri, 24 May 2013 02:25:00 GMT

Hi Mark,

You can use osal_snv_write and osal_snv_read in osal_snv.c to do that. To reserve a 8K block of flash, you need to manage that by yourself. BLE code won't touch your proprietary flash.

Forum Post: RE: Intermittent failure to enable notifications on custom profile / stack V1.3.1

Eng351 — Fri, 24 May 2013 02:24:00 GMT

Hi greenja,

That is not the problem. Once notifications are enabled, the application layer protocol takes care of dropped notifications.

The problem is that the notifications are not being enabled in the first place. The problem is in the peripheral. It receives the request to update the characteristic config from the central, calls the function to update the characteristic config in the GATT server, but the GATT server config is not updated. Furthermore, when the failure occurs, the failure always happens on the next connection

Forum Post: RE: Coordinator software reset - network not functioning

YiKai Chen — Fri, 24 May 2013 02:14:00 GMT

There is no such problem when I use SystemReset. Since all of your I/Os are already in use, you must add lots of application code on your coordinator. I suspect that there are something blocked after SystemReset. I would suggest you to set a breakpoint at ZDOInitDevice in ZDApp.c and try to trace the root cause.

Forum Post: RE: CC2543&CC2544

greenja — Fri, 24 May 2013 02:07:00 GMT

Hello Harvey,

If you are using the sample code from the swrc257.zip, then in the docs folder there is a PDF that outlines what has to be changed in the IAR Workspace to run the example on a different device. You need to modify the Preprocessor Defines. In the Project menu, select options, then select C/C++ Compiler and the Preprocessor tab. You will see the current chip that the example is using.

Thanks,

Forum Post: RE: Reading the same value in two characteristics

greenja — Fri, 24 May 2013 01:12:00 GMT

Hello Serena,

The answer would be yes. I only see characteristic 1 and 3, but that shouldn't matter. If you notice in the simpleProfikeChangeCB, the _GetParameter retrieves the new value. You can set that as a global and then do a _SetParameter call for the other char.

There was an example of this being done in one of the sample projects that had 5 characteristics, where the char5 was encrypted. For some odd reason I can't find it or remember its name??? An OSAL message should also be able to do the same thing. I haven't tried that option, it is just a suggestion.

Thanks

Forum Post: RE: Modifications of CC1125EM-CAT1-868 board for 902 – 928 MHz band

Rob Mitrunen — Thu, 23 May 2013 22:50:00 GMT

My customer made the modifications and had the additional questions:

I ran the transmitter test on the CC1125 and would like to have your advice about the test result.

Attached are 5 pics that I took from the spectrum, showing the spurious and harmonics generated by the CC1125 (with the internal PA).

files -

NO_TX is the CC1125 is not in Transmitter mode

915_-11dbm is to set the RF output power at -11dbm at frequency 915Mhz

915_0dbm is to set the RF output power at 0dbm at frequency 915Mhz

915_15dbm-1 and -2 are to set the RF output power at +15dbm at frequency 915Mhz

It sounds a little noisy and the spurious and harmonics seems high while set to 0dbm or +15dbm RF output power.

From the test data, if I set to 15dbm RF output at 915Mhz, harmonics at 510Mhz is like 38dbm below the carrier (15dbm-23.4dbm, actually, due to the connector and cable loss, I got 13.5dbm only), second Harmonic (1.83Ghz = 915Mhz X 2) is also quite high. Is that caused by the CC1125's internal PA as drive too harder?

Is that normal and could meet the FCC standards?

Forum Post: Initiate scripts on host mcu from CC3000 + Launchpad

Jordan Baczuk — Thu, 23 May 2013 22:47:00 GMT

I'm running the basic Wi-Fi application on the launchpad and I'm trying to initiate actions on the launchpad based on information in received packets on the CC3000.

For example, if I want to get the MCU to turn on an LED (like one on the launchpad board) how do I do this? Is it a command that I have the CC3000 send to the MCU via spi? Where in the code do I put this, is it in the my_wifi_application.c function below? (Copied from the example code)

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

    // Handle receive data command
   case UART_COMMAND_RCV_DATA:
       iReturnValue = recvfrom(ulSocket, pucCC3000_Rx_Buffer, CC3000_APP_BUFFER_SIZE, 0, &tSocketAddr, &tRxPacketLength);
       if (iReturnValue <= 0)
       {
           // No data received by device
           DispatcherUartSendPacket((unsigned char*)pucUARTNoDataString, sizeof(pucUARTNoDataString));
       }
       else
       {
           // Send data to UART...
           DispatcherUartSendPacket(pucCC3000_Rx_Buffer, CC3000_APP_BUFFER_SIZE);

           // Would the function go here???
       }
       break;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

So what command do you use to send data to the MCU, and where is the code that is run on the MCU? Does it have a SPI listener somewhere? I couldn't find that. That information would be really helpful! Thanks again!

Jordan

Forum Post: RE: WL1271: Starting WLAN crashes BT

Victor_Lin — Thu, 23 May 2013 21:55:00 GMT

Hi Henrik,

Have you updated the Bluetooth firmware as well? Please download the latest firmware from here: https://github.com/TI-ECS/bt-firmware

Forum Post: RE: PCB width and layers' quantity.

H Stewart — Thu, 23 May 2013 21:36:00 GMT

Given the parameters Z₀ for the line is about 68 ohms. There is no reason to expect the line to be 50 ohms at this point in the design. I would guess the Ti designer did one of the following:

1.) tuned this line to achieve the targeted performance goals.
2.) or, since it is only about 30 degrees long and not a large mismatch he improved the layout by making it narrower with minimal impact to performance.

As I have written in these forums the task of the matching circuits is much more complex than simple conjugant matches with this type of device. It is generally best to just reuse the reference design.

Forum Post: WL1283 Drivers

Rustin Schroeder — Thu, 23 May 2013 21:24:00 GMT

We're using the WL1283 on a project. I'm looking to obtain information regarding this SoC. We're using this module with an OMAP AM3703 MPU.

I'm looking for:

- which linux drivers to use for WiFi
- what Bluetooth specifications are supported (v2.1, v4.0, low-energy, etc)
- what Bluetooth profiles are supported
- which linux drivers to use for Bluetooth

I've searched the TI website, but have had difficulty finding any pertinent information.

Forum Post: RE: Compile error with Bluetopia stack

Stonestreet One Support — Thu, 23 May 2013 21:15:00 GMT

Hi Shaka,

To fix the error, right click on your Project in CCS, and Click on Properties. In the General Tab under Advanced settings, make sure that the output format is set to legacy COFF.

Regards,

Stonestreet One.