git.rot13.org Git - goodfet/blob - client/GoodFETI2C.py

   1 #!/usr/bin/env python
   2 # GoodFET I2C and I2Ceeprom Client Library
   3 #
   4 # Pre-alpha.  You've been warned!
   5
   6 #import sys, time, string, cStringIO, struct, glob, serial, os
   7
   8 from GoodFET import GoodFET
   9
  10 class GoodFETI2C(GoodFET):
  11     def I2Csetup(self):
  12         """Move the FET into the I2C application."""
  13         self.writecmd(0x02,0x10)
  14
  15     def I2Cstart(self):
  16         """Produce Start condition on I2C bus"""
  17         self.writecmd(0x02,0x20)
  18     def I2Cstop(self):
  19         """Produce Stop condition on I2C bus"""
  20         self.writecmd(0x02,0x21)
  21     def I2Cread(self,count=1):
  22         """Read data from I2C."""
  23         self.writecmd(0x02,0x00,1,[count])
  24     def I2Cwritebytes(self,data):
  25         """Write multiple bytes to I2C."""
  26         self.writecmd(0x02,0x01,len(data),data)
  27     def I2Cwritebyte(self,val):
  28         """Write a single byte to I2C."""
  29         self.I2Cwritebytes([val])
  30     def I2Ctrans(self,readcount,data):
  31         """Use PEEK to do a multi-start transaction"""
  32         return self.writecmd(0x02,0x02,len(data)+1,[readcount]+data)