What steps will reproduce the problem? 1. cd apps/tests/msp430-small/uart/LocalTime 2. make ez430rf2500 debug install 3. stty 9600 sane < /dev/ttyACM0 4. cat /dev/ttyACM0

What is the expected output? - expected output : ez430 local clock

What do you see instead? - I/O error or unreadable things ;-) ...

By defaut, Ez430RF2500 is build with -D__msp430_using_vlo this activate the VLOCLK for ACLOCK this is not the 32768 Khz lF Clock required by ucsi_conf.nc ez430RF2500 platform : ucssel : 0x01, // baud rate clock source ACLK=32kHz ubr : UBR_32KHZ_9600, // baud rate umctl : UMCTL_32KHZ_9600, // baud rate modulation

2 solutions : 1. Change values for VLOCLK, which prevent a rate higher to 2400 bauds 2. Change VLOCLK to LFXT1 in platform.

The two solutions may be useful, I don't know which one is better by default.

I had attached modified files for VLO mode : - tos/platforms/ez430rf2500/UsciConf.nc - tos/chips/msp430-small/usci/msp430usci.h

Thank you for your report.

Yes, you are right. USCI baud rate generator needs fix to match with VLO. I think there is 3rd solution. 3. Use DCO for baud rate clock source.

I seem to have the same problem, but applying the patches above to UsciConf.nc and msp430usci.h and making clean didn't seem to solve the problem (I/O error when trying to read /dev/ttyACM0 port).

I also tried selecting SMCLK (connected to LFXT1 with no divider I hope?) for the UART clock source (set ucssel to 0x02) and that didn't seem to work.

I can alter the blink parameters in code and the hardware responds, so everything else seems to be configured correctly.