Re: [Discuss-gnuradio] Using SPI on BasicRX
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 > Discuss-gnuradio@gnu.org > 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 Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Using SPI on BasicRX
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 Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Using SPI on BasicRX
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?
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
>
>
>
>> Thanks in advance for any help you can give me.
>>
>> The code I'm using is the one below:
>>
>> from gnuradio import gr
>> from gnuradio import window
>> from gnuradio import usrp, howto
>> import wx
>> import time
>> from gnuradio import audio
>>
>> class FlowGraph(gr.top_block):
>> def __init__(self):
>> gr.top_block.__init__(self)
>>
>> decimation = 256
>> center_frequency = 10.7e6
>>
>> self.u = usrp.source_c(0, decimation,
>> fpga_filename="std_2rxhb_2tx.rbf")
>> self.u.set_nchannels(1)
>> self.subdev_spec = (0,0)
>> self.subdev = usrp.selected_subdev(self.u, self.subdev_spec)
>> self.subdev.set_auto_tr(True)
>> self.subdev.select_rx_antenna('RX2')
>> self.u.tune(0, self.subdev, center_frequency)
>> g = self.subdev.gain_range()
>> gain = float(g[0]+g[1])/2
>> self.subdev.set_gain(gain)
>>
>> if __name__ == "__main__":
>> print "Creating flowgraph..." ,
>> tb = TunerFlowGraph()
>> print "[DONE]"
>>
>> print "Starting flowgraph...",
>> tb.start()
>> print "[DONE]"
>>
>> while(1):
>> print "Writing to SPI...",
>> usrp.sink_s()._write_spi(0, usrp.SPI_ENABLE_RX_A,
>> usrp.SPI_FMT_HDR_0|usrp.SPI_FMT_LSB, "@")
>> time.sleep(.030)
>> print "[DONE]"
>
>
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
--
View this message in context:
http://www.nabble.com/Using-SPI-on-BasicRX-tp25440578p25456853.html
Sent from the GnuRadio mailing list archive at Nabble.com.
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Using SPI on BasicRX
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
> Thanks in advance for any help you can give me.
>
> The code I'm using is the one below:
>
> from gnuradio import gr
> from gnuradio import window
> from gnuradio import usrp, howto
> import wx
> import time
> from gnuradio import audio
>
> class FlowGraph(gr.top_block):
> def __init__(self):
> gr.top_block.__init__(self)
>
> decimation = 256
> center_frequency = 10.7e6
>
> self.u = usrp.source_c(0, decimation, fpga_filename="std_2rxhb_2tx.rbf")
> self.u.set_nchannels(1)
> self.subdev_spec = (0,0)
> self.subdev = usrp.selected_subdev(self.u, self.subdev_spec)
> self.subdev.set_auto_tr(True)
> self.subdev.select_rx_antenna('RX2')
> self.u.tune(0, self.subdev, center_frequency)
> g = self.subdev.gain_range()
> gain = float(g[0]+g[1])/2
> self.subdev.set_gain(gain)
>
> if __name__ == "__main__":
> print "Creating flowgraph..." ,
> tb = TunerFlowGraph()
> print "[DONE]"
>
> print "Starting flowgraph...",
> tb.start()
> print "[DONE]"
>
> while(1):
> print "Writing to SPI...",
> usrp.sink_s()._write_spi(0, usrp.SPI_ENABLE_RX_A,
> usrp.SPI_FMT_HDR_0|usrp.SPI_FMT_LSB, "@")
> time.sleep(.030)
> print "[DONE]"
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Using SPI on BasicRX
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?
2 - is the buffer the hex number passed as a string?
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.
Thanks in advance for any help you can give me.
The code I'm using is the one below:
from gnuradio import gr
from gnuradio import window
from gnuradio import usrp, howto
import wx
import time
from gnuradio import audio
class FlowGraph(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
decimation = 256
center_frequency = 10.7e6
self.u = usrp.source_c(0, decimation, fpga_filename="std_2rxhb_2tx.rbf")
self.u.set_nchannels(1)
self.subdev_spec = (0,0)
self.subdev = usrp.selected_subdev(self.u, self.subdev_spec)
self.subdev.set_auto_tr(True)
self.subdev.select_rx_antenna('RX2')
self.u.tune(0, self.subdev, center_frequency)
g = self.subdev.gain_range()
gain = float(g[0]+g[1])/2
self.subdev.set_gain(gain)
if __name__ == "__main__":
print "Creating flowgraph..." ,
tb = TunerFlowGraph()
print "[DONE]"
print "Starting flowgraph...",
tb.start()
print "[DONE]"
while(1):
print "Writing to SPI...",
usrp.sink_s()._write_spi(0, usrp.SPI_ENABLE_RX_A,
usrp.SPI_FMT_HDR_0|usrp.SPI_FMT_LSB, "@")
time.sleep(.030)
print "[DONE]"
--
View this message in context:
http://www.nabble.com/Using-SPI-on-BasicRX-tp25440578p25440578.html
Sent from the GnuRadio mailing list archive at Nabble.com.
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
