Hi,
I am trying to increase the speed of serial communication on my Chipcon
CC2420DBK motes. Currently they support, 19200 and 57600bps as it has an
atmeag128 controller and CC2420 RF chip. I am able to receive packets
correctly on both these speeds, but I want to increase it to the maximum
possible, say 256Kbps or 115Kbps. I have added code to the
Atm128UartP.nc file as:
else if (PLATFORM_BAUDRATE == 115200UL)
m_byte_time = 33; // 1 TMicor ~= 2.12 us, one byte = 69us ~= 33
else if (PLATFORM_BAUDRATE == 230400UL)
m_byte_time = 17; // 1 TMicor ~= 2.12 us, one byte = 35us ~= 17
else if (PLATFORM_BAUDRATE == 256000UL)
m_byte_time = 15; // 1 TMicor ~= 2.12 us, one byte = 31us ~= 15
But when I start the Listen tool, I do not receive any packets in any
application (TestNetwork or TestSerial) whereas at 57600, I receive
everything correctly.
Do I need to do any other changes. My platform uses UART1 of the atm128
processor rather than UART1 as in Micaz. I am currently running T-2.0.2
under cygwin. (I also suspect that the packets are treated differently
in Cygwin and Linux as Linux supports maximum 230400 baudrate as give in
/opt/tinyos-2.x/tools/tinyos/java/serial/ NativeSerial_linux.cpp and
/opt/tinyos-2.x/tools/tinyos/java/serial/ NativeSerial_win32.cpp
What am I missing??? Please suggest as I have been stuck on this problem
for some time.
Thanks
Varun Jain
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