On Mon, May 16, 2011 at 1:52 AM, Prasanna Karthik V < prasannakart...@cse.iitb.ac.in> wrote:
> For example, i would like to input a bit through SI in the rising edge of > the clock and get the output SO in the falling edge of the clock. > It has been a while since I looked at the details of the SPI on the Msp430 (2618). But if memory serves that is how it works. But you hand it a byte and that byte gets shifted out as it shifts the input byte in from the device. I believe it clocks the outgoing bit on the rising edge and clocks the incoming bit on the falling edge. Rather than ask the list, you should be studying the h/w technical documents provided by TI. Or other appropriate mfg. > Assembly gives more control over the bit level behavior. right? > No. And why are you paying attention to this level of detail? What problem are you trying to solve? > > On Mon, May 16, 2011 at 12:23 AM, Prasanna Karthik V < > > prasannakart...@cse.iitb.ac.in> wrote: > > > >> Is there any mean by which i can include assembly code as a part of the > >> application code? > >> > >> I am looking for this option so that i dont have to use the JTAG based > >> approach to download the application code onto the motes. > >> > >> Any idea? > >> > > > > why are you thinking that you need assembly to do this? > > > > what exactly are you thinking of doing? And why this will replace doing > > code/flash writing from the JTAG. > > > > You can program the flash using c code. > > > > But what you are expressing sounds funny. > > > > eric > > > > > >> > I was thinking of directly writing assembly code to do the same. > >> > > >> > I have a basic question. How do i install the hex files generated > >> after > >> > compiling the asm code. Can i use `telosb reinstall` for this? So that > >> the > >> > newly generated hex file is installed on the mote. > >> > > >> > Excuse if that sounds stupid. > >> > > >> > > >> >> Could this help? - http://www.sparkfun.com/products/9544 > >> >> > >> >> Regards, > >> >> > >> >> André > >> >> > >> >> ----- Original Message ----- > >> >> From: Eric Decker > >> >> To: Prasanna Karthik V > >> >> Cc: tinyos-help@millennium.berkeley.edu > >> >> Sent: Saturday, May 14, 2011 8:00 PM > >> >> Subject: Re: [Tinyos-help] Spi Testing > >> >> > >> >> > >> >> > >> >> > >> >> In short, probably not. While SPI is a serial bus, most > >> >> implementations, especially the msp430 implementation enforces byte > >> >> boundaries. The smallest unit of transmission is a byte. > >> >> > >> >> > >> >> On Sat, May 14, 2011 at 11:28 AM, Prasanna Karthik V > >> >> <prasannakart...@cse.iitb.ac.in> wrote: > >> >> > >> >> I am testing the SPI functionality of a connected radio. I > >> could > >> >> see > >> >> that there are functions that send/read a byte over the SPI > >> to/from > >> >> the radio. > >> >> > >> >> Is there any lower level interface that enables us to send a > >> >> bit(through > >> >> SI) over the SPI , thereby receiving the same bit on SO pin? > >> >> > >> >> In short, i want to do bit-banging and test the SPI device's > >> working > >> >> status. > >> >> > >> >> _______________________________________________ > >> >> Tinyos-help mailing list > >> >> Tinyos-help@millennium.berkeley.edu > >> >> > >> > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > >> >> > >> >> > >> >> > >> >> > >> >> -- > >> >> Eric B. Decker > >> >> Senior (over 50 :-) Researcher > >> >> > >> >> > >> >> > >> >> > >> >> > >> >> > >> > ------------------------------------------------------------------------------ > >> >> > >> >> > >> >> _______________________________________________ > >> >> Tinyos-help mailing list > >> >> Tinyos-help@millennium.berkeley.edu > >> >> > >> > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > >> > > >> > > >> > > >> > >> > >> _______________________________________________ > >> Tinyos-help mailing list > >> Tinyos-help@millennium.berkeley.edu > >> > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > >> > > > > > > > > -- > > Eric B. Decker > > Senior (over 50 :-) Researcher > > > > > -- Eric B. Decker Senior (over 50 :-) Researcher
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