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     def peek8(self,adr):
  26         """Read a byte from the given address."""
  27         data=self.SPItrans([0xfe,0x01,0x00,
  28                             0x49,
  29                             0xA7,0,0,0,0,0,0,0,0]);
  30         return ord(data[7]);
  31     def poke8(self,adr, byte):
  32         """Poke a byte to the given address."""
  33     def info(self):
  34         """Read the info bytes."""
  35         data=self.SPItrans([0x0B,0xA7,
  36                             0xFF,
  37                             0xFF,0xFF,0xFF,     #00 02 A7
  38                             0,0,0,0,0,0,0,0,0,0,
  39                             0,0,0,0,0,0,0,0,0,0,
  40                             0,0,0,0,0,0,0,0,0,0,
  41                             0,0,0,0,0,0,0,0,0,0,
  42                             0,0,0,0,0,0,0,0,0,0,
  43                             0,0,0,0,0,0,0,0,0,0
  44                             ]);
  45         for foo in data:
  46             print "%02x" % ord(foo);