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         self.JEDECmanufacturer=ord(data[1]);
  66         self.JEDECtype=ord(data[2]);
  67         self.JEDECcapacity=ord(data[3]);
  68         self.JEDECsize=self.JEDECsizes.get(self.JEDECcapacity);
  69         if self.JEDECsize==None:
  70             self.JEDECsize=0;
  71         self.JEDECdevice=(ord(data[1])<<16)+(ord(data[2])<<8)+ord(data[3]);
  72         return data;
  73     def SPIpeek(self,adr):
  74         """Grab a byte from an SPI Flash ROM."""
  75         data=[0x03,
  76               (adr&0xFF0000)>>16,
  77               (adr&0xFF00)>>8,
  78               adr&0xFF,
  79               0];
  80         self.SPItrans(data);
  81         return ord(self.data[4]);
  82     def SPIpeekblock(self,adr):
  83         """Grab a few block from an SPI Flash ROM.  Block size is unknown"""
  84         data=[(adr&0xFF0000)>>16,
  85               (adr&0xFF00)>>8,
  86               adr&0xFF];
  87
  88         self.writecmd(0x01,0x02,3,data);
  89         return self.data;
  90
  91     def SPIpokebyte(self,adr,val):
  92         self.SPIpokebytes(adr,[val]);
  93     def SPIpokebytes(self,adr,data):
  94         #self.SPIwriteenable();
  95         adranddata=[(adr&0xFF0000)>>16,
  96               (adr&0xFF00)>>8,
  97               adr&0xFF
  98               ]+data;
  99         self.writecmd(0x01,0x03,
 100                       len(adranddata),adranddata);
 101
 102     def SPIchiperase(self):
 103         """Mass erase an SPI Flash ROM."""
 104         self.writecmd(0x01,0x81);
 105     def SPIwriteenable(self):
 106         """SPI Flash Write Enable"""
 107         data=[0x06];
 108         self.SPItrans(data);
 109
 110     def SPIjedecmanstr(self):
 111         """Grab the JEDEC manufacturer string.  Call after SPIjedec()."""
 112         man=self.JEDECmanufacturers.get(self.JEDECmanufacturer)
 113         if man==0:
 114             man="UNKNOWN";
 115         return man;
 116
 117     def SPIjedecstr(self):
 118         """Grab the JEDEC manufacturer string.  Call after SPIjedec()."""
 119         man=self.JEDECmanufacturers.get(self.JEDECmanufacturer);
 120         if man==0:
 121             man="UNKNOWN";
 122         device=self.JEDECdevices.get(self.JEDECdevice);
 123         if device==0:
 124             device="???"
 125         return "%s %s" % (man,device);
 126