git.rot13.org Git - goodfet/blob - client/GoodFETEM260.py

   1 #!/usr/bin/env python
   2 # GoodFET EM260 Radio Client
   3 #
   4 # (C) 2010 Travis Goodspeed <travis at radiantmachines.com>
   5 #
   6 # This code is being rewritten and refactored.  You've been warned!
   7
   8 # The EM260 is almost textbook SPI, except that the response cannot be
   9 # read until after the nHOST_INT pin of the EM260 drops low and a dummy
  10 # byte is read.  That is, the sequence will look like the following:
  11
  12 # Transmit Host->Slave Data
  13 # while(nHOST_INT); //Sleep until ready.
  14 # Recv Dummy Byte
  15 # Recv Slave->Host Data
  16
  17 # The delay is mandatory.
  18
  19 import sys, time, string, cStringIO, struct, glob, serial, os;
  20
  21 from GoodFETSPI import GoodFETSPI;
  22
  23 class GoodFETEM260(GoodFETSPI):
  24     EM260APP=0x01;
  25     seq=0;
  26     def EM260trans(self,data):
  27         """Exchange data by EM260 SPI. (Slightly nonstandard.)"""
  28         self.data=data;
  29         self.writecmd(0x01,0x82,len(data),data);
  30         return self.data;
  31
  32
  33     def peek8(self,adr):
  34         """Read a byte from the given address."""
  35         data=self.EM260trans([0xfe,0x01,self.seq,0x00,
  36                             0x49,
  37                             0xA7]);
  38         s="";
  39         for foo in data:
  40             s=s+"%02x " % ord(foo);
  41         print s;
  42
  43         return ord(data[0]);
  44     def info(self):
  45         """Read the info bytes."""
  46         #data=self.EM260trans([0x0A,0xA7]);
  47         #data=self.EM260trans([0xFE,0x04,
  48         #                      0x00,0x00,0x00,0x02,
  49         #                      0xA7]);
  50         data=self.EM260trans([0x0B,0xA7]);
  51
  52         #data=self.EM260trans([]);
  53
  54         #data=self.EM260trans([0x0B,0x0B,0x0B,0x0B,0xA7]);
  55
  56         s="";
  57         for foo in data:
  58             s=s+"%02x " % ord(foo);
  59         print s;
  60