Hi Andrey: Thanks for the help.
But I'm still a little confused about the bard rate setting stuff. Right now I found 4 files maybe related to bardrate setting as: hardware.h, Atm128Uart.h, atm128UartP.nc and HplAtm128UartP.nc. The "hardware.h" locates in $TOSDIR/tos/platforms/micaz/, with an enum as: PLATFORM_BAUDRATE = 57600L . Is it the general baudrate for both Uart0 and Uart1? So if I change this value, does it mean that the baudrate for UART1 will also be changed? The rest of the files located in $TOSDIR/tos/chips/atm128/. In the Atm128Uart.h, there is also an enum which seems to reflect the real baudrate regester's readings but I could not find where this values are used. In the Atm128UartP.nc, there's a command as Init.init and it seems that the baudrate is set roughly there also. And in the HplAtm128UartP.nc, there's a command as Atm128Calibrate.baudrateRegister(PLATFORM_BAUDRATE) called with a returened value as ubrr0. Then the UBRR0L and UBRR0H was renewed according to ubrr0. So upon the four areas related to baudrate setting, which should I use? And can you give me some wiring example about using UART0 to receive bytes no matter what baudrate it is in? Thanks! Zhen ________________________________________ From: Andrey Gursky [EMAIL PROTECTED] Sent: Wednesday, October 15, 2008 12:55 PM To: Li, Zhen Li Cc: Tinyos-Help Subject: Re: [Tinyos-help] How to set baud rate on UART0 Li, Zhen Li wrote: > Hi > > Does anyone know how to set the baudrate in TinyOS 2.1 for MicaZ's or IRIS's > UART0? I want to set the baudrate to 1200 and I know how to do the baudrate > register's calculation but don't know where to put those values. Also, how > can I use the UART0 to read some bytes? Can anyone tell me something about > the wiring? > > Thanks! Hi Zhen! In $TOSDIR/chips/atm128/HplAtm128UartP.nc there are functions to initialize UART0/1. The both use command call Atm128Calibrate.baudrateRegister(PLATFORM_BAUDRATE); with parameter that is defined in $TOSDIR/platforms/micaz/hardware.h (I assume IRIS uses also this definition from micaz and not from mica, because of the order of includes in $TOSDIR/platforms/iris/.platform) So you should alter this parameter only in hardware.h In $TOSDIR/chips/atm128/Atm128UartP.nc the command Init.init() should be extended with new PLATFORM_BAUDRATE you want to use and the appropriate new calculated value m_byte_time. Hope I was not wrong. Best wishes, Andrey _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
