Hello Everyone, I'm (still) trying to interface the MSP430F5438a uC with the CC2520 radio chip. (I'm using the tp-freeforall/prod repo) Now I'm facing the following problem:
When sending out (TX) messages the SfdCapture.captured event never fires, except after boot-up for the first time. - I captured some of these "first packets" with a CC2531 USB dongle and TI Packet Sniffer and the result looks like this every time: 41 88 11 22 00 FF XX XX XX XX XX XX XX XX XX (where XXs are different every time, but the length is the same, 15) - I also measured the signal with an oscilloscope on GPIO4 of CC2520 (which is set to SFD by default (based on CC2520 Datasheet / SWRS068) and connected to P8.1 on MSP430F5438a) and I can see this first SFD signal after boot-up, but the high-level of the signal is only around 0.3V. (I don' really understand why so low.) - I tried to remap the timers, because by default the radio uses Micro timer (my HplCC2520.nc is based on sam3s_ek) which is mapped to Timer1_A, but the P8.1 (the SFD signal from CC2520) is mapped to Timer0_A which is a T32khz timer, so I replaced Timer0_A and Timer1_A with each other, but it didn't get any better. At the moment I'm out of ideas, if anyone could give me a hint what the problem could be, it'd be great. (the above mentioned event can be found in /tos/chips/cc2520/CC2520DriverLayerP.nc around line 1600) Thank you in advance. Best wishes, Adam Erdelyi _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
