projects / sigrok-firmware-fx2lafw.git / blame
| Commit | Line | Data |
|---|---|---|
| 3608c106 UH |
1 | # Copyright (C) 2009 Ubixum, Inc. |
| 2 | # | |
| 3 | # This library is free software; you can redistribute it and/or | |
| 4 | # | |
| 5 | # modify it under the terms of the GNU Lesser General Public | |
| 6 | # License as published by the Free Software Foundation; either | |
| 7 | # version 2.1 of the License, or (at your option) any later version. | |
| 8 | # | |
| 9 | # This library is distributed in the hope that it will be useful, | |
| 10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | # Lesser General Public License for more details. | |
| 13 | # | |
| 14 | # You should have received a copy of the GNU Lesser General Public | |
| 15 | # License along with this library; if not, write to the Free Software | |
| 16 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 17 | ||
| 18 | import sys | |
| 19 | from fx2load import * | |
| 20 | ||
| 21 | ||
| 22 | def get_eeprom(addr,length): | |
| 23 | assert f.isopen() | |
| 24 | ||
| 25 | prom_val = ''; | |
| 26 | while len(prom_val)<length: | |
| 27 | buf='\x00'*1024 # read 1024 bytes max at a time | |
| 28 | transfer_len = length-len(prom_val) > 1024 and 1024 or length-len(prom_val) | |
| 29 | ret=f.do_usb_command ( buf, | |
| 30 | 0xc0, | |
| 31 | 0xb1, | |
| 32 | addr+len(prom_val),0,transfer_len ) | |
| 33 | if (ret>=0): | |
| 34 | prom_val += buf[:ret] | |
| 35 | else: | |
| 36 | raise Exception("eeprom read didn't work: %d" % ret ) | |
| 37 | return prom_val | |
| 38 | ||
| 39 | ||
| 40 | def hexchartoint(c): | |
| 41 | return int(c.encode('hex'),16) | |
| 42 | ||
| 43 | ||
| 44 | def fetch_eeprom(): | |
| 45 | """ | |
| 46 | See TRM 3.4.2, 3.4,3. | |
| 47 | This function dynamically determines how much data to read for c2 eeprom data and downloads | |
| 48 | the eeprom iic file. | |
| 49 | """ | |
| 50 | assert f.isopen() | |
| 51 | # fetch 1st 8 bytes | |
| 52 | prom=get_eeprom(0,8) | |
| 53 | if prom[0] == '\xc0': | |
| 54 | return prom # c0 blocks are 8 bytes long | |
| 55 | if prom[0] != '\xc2': raise Exception ( "Envalid eeprom (%s)" % prom[0].encode('hex') ) | |
| 56 | # the length of the 1st data block is bytes 8,9 (0 based) | |
| 57 | read_addr=8 | |
| 58 | while True: | |
| 59 | size_read = get_eeprom(read_addr,4) # get the data length and start address | |
| 60 | prom += size_read | |
| 61 | read_addr+=4 | |
| 62 | # if this is the end 0x80 0x01 0xe6 0x00, then break | |
| 63 | if size_read == '\x80\x01\xe6\x00': break | |
| 64 | # else it is a data block | |
| 65 | size = (hexchartoint(size_read[0]) << 8) + hexchartoint(size_read[1]) | |
| 66 | print "Next eeprom data size %d" % size | |
| 67 | prom += get_eeprom(read_addr,size) | |
| 68 | read_addr+=size | |
| 69 | # one last byte | |
| 70 | prom += get_eeprom(read_addr,1) # should always be 0 | |
| 71 | assert prom[-1] == '\x00' | |
| 72 | return prom | |
| 73 | ||
| 74 | ||
| 75 | def set_eeprom(prom): | |
| 76 | assert f.isopen() | |
| 77 | bytes_written=0; | |
| 78 | while bytes_written<len(prom): | |
| 79 | # attemp 1024 at a time | |
| 80 | to_write=len(prom)-bytes_written > 1024 and 1024 or len(prom)-bytes_written | |
| 81 | print "Writing %d Bytes.." % to_write | |
| 82 | ret=f.do_usb_command(prom[bytes_written:bytes_written+to_write], 0x40,0xb1,bytes_written, 0, to_write, 10000) | |
| 83 | if ret>0: | |
| 84 | bytes_written += ret; | |
| 85 | else: | |
| 86 | raise Exception ( "eeprom write didn't work: %d" % ret ) | |
| 87 | ||
| 88 | ||
| 89 | if __name__=='__main__': | |
| 90 | ||
| 91 | openfx2(0x04b4,0x0083) # vid/pid of eeprom firmware | |
| 92 |