git.rot13.org Git - goodfet/blob - client/GoodFETNRF.py

   1 #!/usr/bin/env python
   2 # GoodFET Nordic RF Radio Client
   3 #
   4 # (C) 2009 Travis Goodspeed <travis at radiantmachines.com>
   5 #
   6 # This code is being rewritten and refactored.  You've been warned!
   7
   8 import sys, time, string, cStringIO, struct, glob, serial, os;
   9
  10 from GoodFET import GoodFET;
  11
  12 class GoodFETNRF(GoodFET):
  13     NRFAPP=0x50;
  14     def NRFsetup(self):
  15         """Move the FET into the NRF application."""
  16         self.writecmd(self.NRFAPP,0x10,0,self.data); #NRF/SETUP
  17
  18     def NRFtrans8(self,byte):
  19         """Read and write 8 bits by NRF."""
  20         data=self.NRFtrans([byte]);
  21         return ord(data[0]);
  22
  23     def NRFtrans(self,data):
  24         """Exchange data by NRF."""
  25         self.data=data;
  26         self.writecmd(self.NRFAPP,0x00,len(data),data);
  27         return self.data;
  28
  29     def peek(self,reg,bytes=1):
  30         """Read an NRF Register.  For long regs, result is flipped."""
  31         data=[reg,0,0,0,0,0];
  32         self.writecmd(self.NRFAPP,0x02,len(data),data);
  33         toret=0;
  34         for i in range(0,bytes):
  35             toret=toret|(ord(self.data[i+1])<<(8*i));
  36         return toret;
  37     def poke(self,reg,val,bytes=1):
  38         """Write an NRF Register."""
  39         data=[reg];
  40         for i in range(0,bytes):
  41             data=data+[(val>>(8*i))&0xFF];
  42         self.writecmd(self.NRFAPP,0x03,len(data),data);
  43         if self.peek(reg,bytes)!=val:
  44             print "Warning, failed to set register %02x." %reg;
  45         return;
  46
  47     def status(self):
  48         """Read the status byte."""
  49         self.poke(0x07,0x78); #Reset status
  50         status=self.peek(0x07);
  51         print "Status=%02x" % status;
  52
  53     #Radio stuff begins here.
  54     def RF_freq(self,frequency):
  55         """Set the frequency in Hz."""
  56
  57         #On the NRF24L01+, register 0x05 is the offset in
  58         #MHz above 2400.
  59
  60         mhz=frequency/1000000-2400;
  61         print "Setting channel %i." % mhz
  62         self.poke(0x05,mhz);
  63     def RF_getsmac(self):
  64         """Return the source MAC address."""
  65
  66         #Register 0A is RX_ADDR_P0, five bytes.
  67         mac=self.peek(0x0A, 5);
  68         return mac;