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                         0x1F: "Atmel"
  34                         };
  35
  36     JEDECdevices={0xFFFFFF: "MISSING",
  37                   0xEF3015: "W25X16L",
  38                   0xEF3014: "W25X80L",
  39                   0xEF3013: "W25X40L",
  40                   0xEF3012: "W25X20L",
  41                   0xEF3011: "W25X10L",
  42                   0xC22017: "MX25L6405D",
  43                   0xC22016: "MX25L3205D",
  44                   0xC22015: "MX25L1605D",
  45                   0xC22014: "MX25L8005",
  46                   0xC22013: "MX25L4005",
  47                   0x204011: "M45PE10"
  48                   };
  49
  50     JEDECsizes={0x17: 0x800000,
  51                 0x16: 0x400000,
  52                 0x15: 0x200000,
  53                 0x14: 0x100000,
  54                 0x13: 0x080000,
  55                 0x12: 0x040000,
  56                 0x11: 0x020000
  57                 };
  58
  59     JEDECsize=0;
  60
  61     def SPIjedec(self):
  62         """Grab an SPI Flash ROM's JEDEC bytes."""
  63         data=[0x9f, 0, 0, 0];
  64         data=self.SPItrans(data);
  65
  66         self.JEDECmanufacturer=ord(data[1]);
  67         self.JEDECtype=ord(data[2]);
  68         self.JEDECcapacity=ord(data[3]);
  69         self.JEDECsize=self.JEDECsizes.get(self.JEDECcapacity);
  70         if self.JEDECsize==None:
  71             self.JEDECsize=0;
  72         self.JEDECdevice=(ord(data[1])<<16)+(ord(data[2])<<8)+ord(data[3]);
  73         return data;
  74     def SPIpeek(self,adr):
  75         """Grab a byte from an SPI Flash ROM."""
  76         data=[0x03,
  77               (adr&0xFF0000)>>16,
  78               (adr&0xFF00)>>8,
  79               adr&0xFF,
  80               0];
  81         self.SPItrans(data);
  82         return ord(self.data[4]);
  83     def SPIpeekblock(self,adr):
  84         """Grab a few block from an SPI Flash ROM.  Block size is unknown"""
  85         data=[(adr&0xFF0000)>>16,
  86               (adr&0xFF00)>>8,
  87               adr&0xFF];
  88
  89         self.writecmd(0x01,0x02,3,data);
  90         return self.data;
  91
  92     def SPIpokebyte(self,adr,val):
  93         self.SPIpokebytes(adr,[val]);
  94     def SPIpokebytes(self,adr,data):
  95         #Used to be 24 bits, BE, not 32 bits, LE.
  96         adranddata=[adr&0xFF,
  97                     (adr&0xFF00)>>8,
  98                     (adr&0xFF0000)>>16,
  99                     0, #MSB
 100                     ]+data;
 101         #print "%06x: poking %i bytes" % (adr,len(data));
 102         self.writecmd(0x01,0x03,
 103                       len(adranddata),adranddata);
 104
 105     def SPIchiperase(self):
 106         """Mass erase an SPI Flash ROM."""
 107         self.writecmd(0x01,0x81);
 108     def SPIwriteenable(self):
 109         """SPI Flash Write Enable"""
 110         data=[0x06];
 111         self.SPItrans(data);
 112
 113     def SPIjedecmanstr(self):
 114         """Grab the JEDEC manufacturer string.  Call after SPIjedec()."""
 115         man=self.JEDECmanufacturers.get(self.JEDECmanufacturer)
 116         if man==0:
 117             man="UNKNOWN";
 118         return man;
 119
 120     def SPIjedecstr(self):
 121         """Grab the JEDEC manufacturer string.  Call after SPIjedec()."""
 122         man=self.JEDECmanufacturers.get(self.JEDECmanufacturer);
 123         if man==0:
 124             man="UNKNOWN";
 125         device=self.JEDECdevices.get(self.JEDECdevice);
 126         if device==0:
 127             device="???"
 128         return "%s %s" % (man,device);
 129