2 # GoodFET SPI and SPIFlash Client Library
4 # (C) 2009 Travis Goodspeed <travis at radiantmachines.com>
6 # This code is being rewritten and refactored. You've been warned!
8 import sys, time, string, cStringIO, struct, glob, serial, os;
10 from GoodFET import GoodFET;
12 class GoodFETSPI(GoodFET):
14 """Move the FET into the SPI application."""
15 self.writecmd(0x01,0x10,0,self.data); #SPI/SETUP
17 def SPItrans8(self,byte):
18 """Read and write 8 bits by SPI."""
19 data=self.SPItrans([byte]);
22 def SPItrans(self,data):
23 """Exchange data by SPI."""
25 self.writecmd(0x01,0x00,len(data),data);
28 class GoodFETSPIFlash(GoodFETSPI):
29 JEDECmanufacturers={0xFF: "MISSING",
35 JEDECdevices={0xFFFFFF: "MISSING",
40 0xC22017: "MX25L6405D",
41 0xC22016: "MX25L3205D",
42 0xC22015: "MX25L1605D",
43 0xC22014: "MX25L8005",
44 0xC22013: "MX25L4005",
48 JEDECsizes={0x16: 0x800000,
58 """Grab an SPI Flash ROM's JEDEC bytes."""
60 data=self.SPItrans(data);
61 #print "Manufacturer: %02x\nType: %02x\nCapacity: %02x" % (ord(data[1]),ord(data[2]),ord(data[3]));
62 self.JEDECmanufacturer=ord(data[1]);
63 self.JEDECtype=ord(data[2]);
64 self.JEDECcapacity=ord(data[3]);
65 self.JEDECsize=self.JEDECsizes.get(self.JEDECcapacity);
66 if self.JEDECsize==None:
68 self.JEDECdevice=(ord(data[1])<<16)+(ord(data[2])<<8)+ord(data[3]);
70 def SPIpeek(self,adr):
71 """Grab a byte from an SPI Flash ROM."""
78 return ord(self.data[4]);
79 def SPIpeekblock(self,adr,blocks=1):
80 """Grab a few block from an SPI Flash ROM. Block size is unknown"""
81 data=[(adr&0xFF0000)>>16,
86 self.writecmd(0x01,0x02,4,data,blocks);
89 def SPIpokebyte(self,adr,val):
90 self.SPIpokebytes(adr,[val]);
91 def SPIpokebytes(self,adr,data):
92 #self.SPIwriteenable();
93 adranddata=[(adr&0xFF0000)>>16,
97 self.writecmd(0x01,0x03,
98 len(adranddata),adranddata);
100 def SPIchiperase(self):
101 """Mass erase an SPI Flash ROM."""
102 self.writecmd(0x01,0x81,0,[]);
103 def SPIwriteenable(self):
104 """SPI Flash Write Enable"""
108 def SPIjedecmanstr(self):
109 """Grab the JEDEC manufacturer string. Call after SPIjedec()."""
110 man=self.JEDECmanufacturers.get(self.JEDECmanufacturer)
115 def SPIjedecstr(self):
116 """Grab the JEDEC manufacturer string. Call after SPIjedec()."""
117 man=self.JEDECmanufacturers.get(self.JEDECmanufacturer);
120 device=self.JEDECdevices.get(self.JEDECdevice);
123 return "%s %s" % (man,device);