CC2560 data transfer rate questions

Hello Leo,

Bluetooth symbol rate is 1 Mega-symbol per second supporting the Basic Rate (BR) bit rate of 1Mbit/sec or, with
Enhanced Data Rate (EDR), a gross air bit rate of 2 or 3Mbit/sec.
Max net air throughput that could be achieved with a Bluetooth link is 2178.1kbit/sec (asymmetric, 3-DH5 ACL packet).

All members is CC256x familiy support the max throughtput defined by the Bluetooth specification.

MSP430 is an MCU with limitted resources, and therefore cannot support the max throughtput defined by the Bluetooth specification:
* SPP payload size is limitted to 110Bytes in order to reduce Bluetooth SW RAM footprint (MSP430BT5190 RAM size is 16kByte).
* MSP430 UART max rate is 921.6kbps, which puts a limit to max data rate between MSP430 and CC256x (HCI - Host Controller Interface).

"Developer's Guide" provides detailed info on the max air throughtput available as function of different parameters, such as UART rate.
http://processors.wiki.ti.com/images/6/6f/MSP430BT5190_CC2560_Developers_Guide.pdf

EZ430-RF2560 kit introduces another limitation on the data rate between MSP430BT5190 and EZ430U Emulator Board: EZ430U HW supports
maximum UART baudrate of 9.6kbps.
Please refer to http://processors.wiki.ti.com/index.php/EZ430-RF2560

Bluetooth-WiFi Coexistence:
I would appreciate if you could elaborate your question - are you referring to WiFi air traffic while product Bluetooth is active?

Regards,
Nir

Hello,

I have some questions about the bluetooth and wifi coexistence

Well, I wish to know if we have up to 4 or more bluetooth devices working in a closed area (a room for example), and in that room we have active wifi signals frome one or more networks, do they can coexist without interference?

how can the frequency allocation algorithm of bluetooth afect the true put simbolrate in a similar working condition?

In the other hand, I have been working with the ez430-rf2560 evaluation tool and in the code example it has a defined sampling frequency for the accelerometer, I whish to know how can I increase the sampling frequency?

Thank you!!

Hello Jose,

Adaptive Frequency Hopping

Bluetooth hopping pattern can be adapted to exclude a portion of the frequencies that are used by interfering devices.

The adaptive hopping technique improves Bluetooth co-existence with static (non-hopping) ISM systems when they are co-located.

The adapted piconet must use at least 20 channels.

AFH does not affect air-throughput.

EZ430-RF2560

EZ430-RF2560 WiKi contains useful info on RF2560T target board architecture - http://processors.wiki.ti.com/index.php/EZ430-RF2560

You can find CMA3000-D01 3D-Accelrometer datasheet on VTI website - http://www.vti.fi/en/products/accelerometers/consumer_electronics/cma3000_series/ 

 
Regards,
Nir