BOOSTXL-AFE031-DF1: reverse engineering example code for RX

Hello User,

AFE031 and AFE032 are very similar, however the ICs are not pin-to-pin compatible. Both parts are in QFN-48 pin package. The selection of two ICs will depend on your design and product requirements. 

AFE031 is a lower cost, but it is very capable PLC controller (it is designed for a different applications). AFE031's power amplifier output can provide up to 12V peak to peak voltage swing with continuous current up to 1.5A_peak (with 15V PA Supply). The power amplifier's frequency response is approx. 670kHz. 

http://www.ti.com/lit/ds/symlink/afe031.pdf

AFE032 is slightly more powerful PLC analog front-end controller. AFE032's power amplifier output can provide up to 12V peak to peak voltage swing with continuous current up to 1.9A_peak (with 15V PA power Supply). Its full power BW is approx. 1MHz. 

http://www.ti.com/lit/ds/symlink/afe032.pdf

If you provide me with design and product requirements, I can recommend the IC on your behalf.  

Regarding to MCUs, you may use any MCU that is familiar to you (as long as comparable or similar to TMS320F28379D performance specification). You do not have to use TMS320F28379D micro that recommended by C2000 LaunchPad XL development board. 

Regarding to development sample code, you are able to download them in the link below. If you have any technical questions, I will be available to support, recommend and explain any technical issues that you may encounter. 

Best,

Raymond

Thank you for your reply.

But my main question remains:

I have read the pdf that you linked, and I have downloaded

http://www.ti.com/tool/download/C2000WARE

The example code according to the pdf you linked is:

C:\ti\c2000\C2000Ware_x_xx_xx_xx\device_support\f2837xd\examples\cpu1

The available example projects are:

• boostxl_afe031_f28379d_pwmmode

• boostxl_afe031_f28379d_dacmode

• boostxl_afe031_f28379d_rx

I have uploaded the example code to two LAUNCHXL-F280049C boards, and it works just fine.

But now to the problem:

The last example code: "boostxl_afe031_f28379d_rx" contains a file named: "fsk_corr_detect.lib"

The code for decoding the signal is in that file.

A .lib file is a precompiled "library file", meaning that I can use it, but I can not read the code.

And my job right now is to read and understand this code, this is why I am asking if there is anyway for me to get my hands on a readable version of this file.

Hello User,

Question:

But now to the problem:

The last example code: "boostxl_afe031_f28379d_rx" contains a file named: "fsk_corr_detect.lib"

The code for decoding the signal is in that file.

A .lib file is a precompiled "library file", meaning that I can use it, but I can not read the code.

And my job right now is to read and understand this code, this is why I am asking if there is anyway for me to get my hands on a readable version of this file.

I did not write the code and it was done by TI's MCU group. I will see if that if I am able to get your the copy (I can not sure if it can be released to public, but I will ask). 

AFE03x IC is sending out analog frequency via Binary Frequency Shift Keying technique. For instance, if one analog frequency at 141kHz that represents logic "0" and other analog frequency at 131kHz that represent "1", you have to convert the analog signal to "1" and "0" through ADC with certain sampling rate. Typically, the ADC sampling rate has to be 10X or greater than the highest receiving frequency.  Once the analog signal is converted digital data, Fast FFT algorithm is performed, which "1" and "0" will be extracted; and the entire process is repeated until the entire message is received. It is a pretty standard decoding technique using MCU.

There are other decoding technique, and it may be converted the FSK signals using hardware or combined hardware/software techniques. 

Enclosed is BFSK signal data presented in the Rx line. 

If you have other questions, please let us know.

Best,

Raymond

Thank you, I actually missed that part of the document.