Hi. Just to say I got it to work as I wished. As always, thanks for the help Eric.
Eric Blossom wrote: > > On Tue, Sep 15, 2009 at 09:06:58AM -0700, E. Ornelas wrote: >> >> Thanks for the help. >> >> I have another question: >> I noticed that the transfer is done 8-bit at a time. >> I need to write a 24-bit word into a ADF4153 Frequency Synthesizer. >> Is it possible to transfer 24-bit in a single burst? > > The example below writes 32 bits in a single transfer. > You can confirm this by looking at the SEN and CLK signals. > > To send 24-bits, give it 3 bytes. > > Eric > > >> Again, thank you for your time. >> >> >> Eric Blossom wrote: >> > >> > On Mon, Sep 14, 2009 at 11:02:36AM -0700, E. Ornelas wrote: >> >> >> >> Hello. >> >> I'm trying to use the SPI interface of a BasicRX. >> >> I made a small test program. >> >> It basically keeps on writing. >> >> >> >> There are a few things I need to know: >> >> 1 - is this the right way to use the SPI? >> > >> > Pretty close. See below. >> > >> >> 2 - is the buffer the hex number passed as a string? >> > >> > It's binary, not hex. >> > >> >> 3 - Even though I don't know what to expect with the buffer I used, I >> at >> >> least expected to see something in the BasicRX SPI pins, which I >> don't... >> >> I >> >> can see some periodic bursts on the clock pin but nothing on the >> signal. >> > >> > We never implemented SPI_FMT_LSB; Use SPI_FMT_MSB instead. >> > >> > >> > Try this: >> > >> > from gnuradio import usrp >> > >> > u = usrp.source_c(0) >> > spi_cmd = ''.join([chr(x) for x in [0x55, 0xAA, 0x55, 0xAA]]) >> > >> > while True: >> > r = u._write_spi(0, usrp.SPI_ENABLE_RX_A, >> > usrp.SPI_FMT_HDR_0|usrp.SPI_FMT_MSB, spi_cmd) >> > >> > >> > >> > Look at the SDI (into the d'board), SCLK and SEN pins. >> > >> > Eric > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://www.nabble.com/Using-SPI-on-BasicRX-tp25440578p25530780.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
