TMS320F280025C: AFE031 FSK Library

Hi HK,

I believe the EABI .lib file was provided to you already. See prior E2E below, which still has the file attached in one of Matt's replies.

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/990015/tms320f280025c-tms320f280025c

Is there something else you're requesting?

Best,

Kevin

Is there are any update version for the library?

Hi HK,

No update since last time. We did put the source / project files in the MySecureSW project however, not sure if you already have that.

I renewed your access to the project in case. Use the link below to download the 'C2000-AFE031_FSK_RX_SOURCE' project.

https://myportal.ti.com/portal/dt?lt=myti&provider=TIPassLoginSingleContainer&j5=2&j3=1&goto=https%3A%2F%2Fwww.ti.com%3A443%2Fsecuresoftware%2Fdocs%2Fsecuresoftware.tsp

Best,

Kevin

Thanks for reply

Last question. If I set RX gain to high and cause PLC signal saturated e.g. the signal become square wave instead of sine wave. Does this cause any problem a wrong decode the signal?

Hi HK,

Are you meaning setting the AFE031's PGA gains along the RX path? Or something else? Not sure how the signal is being saturated to a square wave in your case.

The full-scale range of the C2000's ADC is 0-3.3V. The input signal should not exceed this range.

Best,

Kevin

What i mean is that if I set a RX gain of rxPGA_1 and rxPGA_2 very high and cause signal from Rx_PGA2_out saturated. Of course, it is 3.3V max.

Hi HK,

I believe the AFE031 can output a signal >3.3V if the input signal and configured PGA gain allows it. The square wave you're seeing is likely a result of the ADC input voltage being clamped by the C2000 or some external circuit, which is not good.

You should always ensure the input signal to the C2000 ADC is within the 0~3.3V input range, going outside it can damage the device. This may require implementing an Automatic Gain Control feature into your software. See section 5.3.2 'Automatic Gain Control (AGC)' of the SPRAC94 App Note for similar details.

Best,

Kevin