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

   1 #!/usr/bin/env python
   2 # GoodFET SPI and SPIFlash Client Library
   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 GoodFETSPI(GoodFET):
  13     def SPIsetup(self):
  14         """Move the FET into the SPI application."""
  15         self.writecmd(0x01,0x10,0,self.data); #SPI/SETUP
  16
  17     def SPItrans8(self,byte):
  18         """Read and write 8 bits by SPI."""
  19         data=self.SPItrans([byte]);
  20         return ord(data[0]);
  21
  22     def SPItrans(self,data):
  23         """Exchange data by SPI."""
  24         self.data=data;
  25         self.writecmd(0x01,0x00,len(data),data);
  26         return self.data;
  27
  28 class GoodFETSPIFlash(GoodFETSPI):
  29     JEDECmanufacturers={0xFF: "MISSING",
  30                         0xEF: "Winbond",
  31                         0xC2: "MXIC",
  32                         0x20: "Numonyx/ST"
  33                         };
  34
  35     JEDECdevices={0xFFFFFF: "MISSING",
  36                   0xEF3014: "W25X80L",
  37                   0xEF3013: "W25X40L",
  38                   0xEF3012: "W25X20L",
  39                   0xEF3011: "W25X10L",
  40                   0xC22014: "MX25L8005",
  41                   0xC22013: "MX25L4005",
  42                   0x204011: "M45PE10"
  43                   };
  44     JEDECsizes={0x14: 0x100000,
  45                 0x13: 0x080000,
  46                 0x12: 0x040000,
  47                 0x11: 0x020000}
  48     JEDECsize=0;
  49
  50     def SPIjedec(self):
  51         """Grab an SPI Flash ROM's JEDEC bytes."""
  52         data=[0x9f, 0, 0, 0];
  53         data=self.SPItrans(data);
  54         #print "Manufacturer: %02x\nType: %02x\nCapacity: %02x" % (ord(data[1]),ord(data[2]),ord(data[3]));
  55         self.JEDECmanufacturer=ord(data[1]);
  56         self.JEDECtype=ord(data[2]);
  57         self.JEDECcapacity=ord(data[3]);
  58         self.JEDECsize=self.JEDECsizes.get(self.JEDECcapacity);
  59         if self.JEDECsize==None:
  60             self.JEDECsize=0;
  61         self.JEDECdevice=(ord(data[1])<<16)+(ord(data[2])<<8)+ord(data[3]);
  62         return data;
  63     def SPIpeek(self,adr):
  64         """Grab a byte from an SPI Flash ROM."""
  65         data=[0x03,
  66               (adr&0xFF0000)>>16,
  67               (adr&0xFF00)>>8,
  68               adr&0xFF,
  69               0];
  70         self.SPItrans(data);
  71         return ord(self.data[4]);
  72     def SPIpeekblock(self,adr,blocks=1):
  73         """Grab a few block from an SPI Flash ROM.  Block size is unknown"""
  74         data=[(adr&0xFF0000)>>16,
  75               (adr&0xFF00)>>8,
  76               adr&0xFF,
  77               blocks];
  78
  79         self.writecmd(0x01,0x02,4,data,blocks);
  80         return self.data;
  81
  82     def SPIpokebyte(self,adr,val):
  83         self.SPIpokebytes(adr,[val]);
  84     def SPIpokebytes(self,adr,data):
  85         #self.SPIwriteenable();
  86         adranddata=[(adr&0xFF0000)>>16,
  87               (adr&0xFF00)>>8,
  88               adr&0xFF
  89               ]+data;
  90         self.writecmd(0x01,0x03,
  91                       len(adranddata),adranddata);
  92
  93     def SPIchiperase(self):
  94         """Mass erase an SPI Flash ROM."""
  95         self.writecmd(0x01,0x81,0,[]);
  96     def SPIwriteenable(self):
  97         """SPI Flash Write Enable"""
  98         data=[0x06];
  99         self.SPItrans(data);
 100
 101     def SPIjedecmanstr(self):
 102         """Grab the JEDEC manufacturer string.  Call after SPIjedec()."""
 103         man=self.JEDECmanufacturers.get(self.JEDECmanufacturer)
 104         if man==0:
 105             man="UNKNOWN";
 106         return man;
 107
 108     def SPIjedecstr(self):
 109         """Grab the JEDEC manufacturer string.  Call after SPIjedec()."""
 110         man=self.JEDECmanufacturers.get(self.JEDECmanufacturer);
 111         if man==0:
 112             man="UNKNOWN";
 113         device=self.JEDECdevices.get(self.JEDECdevice);
 114         if device==0:
 115             device="???"
 116         return "%s %s" % (man,device);
 117