content/prologix.rst

Tue, 15 Mar 2016 16:23:22 +0100

author
David Douard <david.douard@logilab.fr>
date
Tue, 15 Mar 2016 16:23:22 +0100
changeset 38
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[10MHz] typos

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1 ==================================================
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2 Updating the Prologix USB-GPIB firmware on Linux
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3 ==================================================
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4
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5
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6 :author: David Douard
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7 :date: 2016-03-10
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8 :Category: Electronics
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9 :Tags: test equipment, GPIB, Prologix
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10
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11
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12 Prologix_ sell several low cost GPIB controllers. I have one their old
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13 deprecated dongle "GPIB-USB Controller 4.2" and had fun with it with
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14 my pygpibtoolkit_ project.
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15
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16 It's a very simple dongle consisting in an Atmel ATMega164P
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17 microcontroller and a FTDI FT245FL chip for the USB<->RS232
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18 convertion.
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19
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20 .. image:: {filename}images/prologix/prologix_4.2_small.jpg
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21 :alt: The Prologix GPIB-USB controller.
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22
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23 Unfortunately, it's no longer available (I find this unfortunate
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24 because it was really cheap, and very useful for hobbyist like me).
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25
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26
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27 Upgrading the buggy firmware
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28 ============================
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29
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30 My controller had the version 5.2 of the firmware, which really is
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31 buggy. For example if a device on the GPIB bus is continuously sending
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32 data and the controller is in "auto" mode (in which it automatically
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33 perform a reading of the available data), then it was impossible to
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34 send it commands anymore.
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35
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36 Unfortunately, the Prologix web site only describe the product as "No
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37 longer in production". There is still an available FAQ_ and the `user
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38 manual`_, but the firmware update procedure is not described any more.
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39
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40 However, the `directory serving all the firmwares`_ for their products
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41 still have the firmwares for this device. The latest published version
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42 is the `4.2-6.95`_ (in fact, it's the version 6.95 of the firware for
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43 the version 4.2 of the USB-GPIB controller).
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44
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45 The content of this archive is::
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46
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47 unzip -l ~/Downloads/gpib-usb-4.2-6.95.zip
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48 Archive: /home/david/Downloads/gpib-usb-4.2-6.95.zip
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49 Length Date Time Name
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50 --------- ---------- ----- ----
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51 244837 2007-07-08 23:57 avrdude.conf
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52 186880 2007-07-08 23:57 avrdude.exe
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53 31162 2010-09-21 10:57 m16.hex
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54 31542 2010-09-21 10:57 m164.hex
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55 61440 2010-06-16 18:21 PxUpdate.exe
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56 409 2009-01-21 11:00 readme.txt
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57 --------- -------
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58 556270 6 files
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59
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60
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61 Obviously, Windows stuff only, and no documentation on how to upgrade
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62 the device on Linux.
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63
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64 But the fact it uses avrdude_ is good sign it might to find solutions
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65 on Linux. According the names of the hex files, it seems there have 2
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66 versions of the hardware, one with a ATMega16 and one with a
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67 ATMega164P (mine uses a 164P).
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68
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69 Now, the question is: haw is the AVR programmed? There are dozens of
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70 'backends' available on avrdude.
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71
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72 Doing a ``string`` on the main exe in thie archive, PxUpdate.exe,
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73 shows a few interesting things, especially this::
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74
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75 strings PxUpdate.exe | grep -i avr
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76 avrdude.exe -p %s -P \\.\COM%d -c avr109 -u -e -U flash:w:%s
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77 AVRBOOT
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78
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79 So we know the commande line used by this firmware update tool, and we
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80 known it uses the AVR's bootloader as decribed in the AVR109_
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81 application note.
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82
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83 But any attempt to read the content of the flash using::
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84
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85 avrdude -p m164p -c avr109 -U flash:r:flash.hex:i
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86
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87 fails stating the avr does not respond::
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88
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89 avrdude -P /dev/ttyUSB0 -p m164p -c avr109 -v -v -U flash:r:flash2.hex:i
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90
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91 avrdude: Version 6.1, compiled on Sep 11 2014 at 20:00:34
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92 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
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93 Copyright (c) 2007-2014 Joerg Wunsch
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94
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95 System wide configuration file is "/etc/avrdude.conf"
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96 User configuration file is "/home/david/.avrduderc"
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97 User configuration file does not exist or is not a regular file, skipping
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98
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99 Using Port : /dev/ttyUSB0
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100 Using Programmer : avr109
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101 AVR Part : ATmega164P
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102 Chip Erase delay : 55000 us
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103 PAGEL : PD7
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104 BS2 : PA0
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105 RESET disposition : dedicated
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106 RETRY pulse : SCK
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107 serial program mode : yes
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108 parallel program mode : yes
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109 Timeout : 200
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110 StabDelay : 100
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111 CmdexeDelay : 25
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112 SyncLoops : 32
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113 ByteDelay : 0
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114 PollIndex : 3
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115 PollValue : 0x53
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116 Memory Detail :
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117
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118 Block Poll Page Polled
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119 Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
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120 ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
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121 eeprom 4 10 128 0 no 512 4 0 9000 9000 0xff 0xff
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122 flash 33 6 128 0 yes 16384 128 128 4500 4500 0xff 0xff
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123 lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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124 lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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125 hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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126 signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
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127 calibration 0 0 0 0 no 4 0 0 0 0 0x00 0x00
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128
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129 Programmer Type : butterfly
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130 Description : Atmel AppNote AVR109 Boot Loader
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131
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132 Connecting to programmer: .avrdude: ser_recv(): programmer is not responding
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133 avrdude: butterfly_recv(): programmer is not responding
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134
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135
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136 So there is something else required to put the device under firmware
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137 upgrade state. I was wondering is there is an undocumented controller
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138 commands (anything starting with ``++`` is interpreted as a controller
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139 command, so I searched for the ``++`` string in ``PxUpdate.exe``::
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140
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141 strings PxUpdate.exe | grep ++
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142 Microsoft Visual C++ Runtime Library
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143 ++rst
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144
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145 No magic undocumented command, but a reset of the controller is
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146 performed by this tool. Let's try this::
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147
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148 stty -F /dev/ttyUSB0 speed 115200 cs8 -cstopb -parenb
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149 echo -en '++rst\r' > /dev/ttyUSB0; avrdude -P /dev/ttyUSB0 -p m164p -c avr109 -v -v -U flash:r:flash2.hex:i
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150 avrdude: Version 6.1, compiled on Sep 11 2014 at 20:00:34
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151 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
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152 Copyright (c) 2007-2014 Joerg Wunsch
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153
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154 System wide configuration file is "/etc/avrdude.conf"
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155 User configuration file is "/home/david/.avrduderc"
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156 User configuration file does not exist or is not a regular file, skipping
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157
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158 Using Port : /dev/ttyUSB0
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159 Using Programmer : avr109
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160 AVR Part : ATmega164P
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161 Chip Erase delay : 55000 us
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162 PAGEL : PD7
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163 BS2 : PA0
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164 RESET disposition : dedicated
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165 RETRY pulse : SCK
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166 serial program mode : yes
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167
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168 parallel program mode : yes
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169 Timeout : 200
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170 StabDelay : 100
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171 CmdexeDelay : 25
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172 SyncLoops : 32
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173 ByteDelay : 0
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174 PollIndex : 3
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175 PollValue : 0x53
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176 Memory Detail :
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177
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178 Block Poll Page Polled
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179 Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
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180 ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
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181 eeprom 4 10 128 0 no 512 4 0 9000 9000 0xff 0xff
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182 flash 33 6 128 0 yes 16384 128 128 4500 4500 0xff 0xff
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183 lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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184 lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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185 hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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186 signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
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187 calibration 0 0 0 0 no 4 0 0 0 0 0x00 0x00
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188
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189 Programmer Type : butterfly
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190 Description : Atmel AppNote AVR109 Boot Loader
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191
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192 Connecting to programmer: .
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193 Found programmer: Id = "AVRBOOT"; type = S
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194 Software Version = 1.0; Hardware Version = 1.0
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195 Programmer supports auto addr increment.
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196 Programmer supports buffered memory access with buffersize=128 bytes.
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197
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198 Programmer supports the following devices:
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199 Device code: 0x76
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200
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201 avrdude: devcode selected: 0x76
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202 avrdude: AVR device initialized and ready to accept instructions
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203
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204 Reading | ################################################## | 100% 0.00s
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205
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206 avrdude: Device signature = 0x1e940a
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207 avrdude: safemode: Fuse reading not support by programmer.
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208 Safemode disabled.
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209 avrdude: reading flash memory:
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210
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211 Reading | ################################################## | 100% 0.26s
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212
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213 avrdude: writing output file "flash2.hex"
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214
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215 avrdude done. Thank you.
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216
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217 Much better!
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218
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219 Now I can upgrade the firmware::
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220
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221 echo -en '++rst\r' > /dev/ttyUSB0; avrdude -P /dev/ttyUSB0 -p m164p -c avr109 -v -v -U flash:w:m164.hex
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222
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223 Et voilĂ ! The Prologix GPIB-USB interface is upgraded to the latest
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224 available software. From what I've seen so far, it seems more stable
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225 (at least I can read data from my HP5442A and HP3456A in "fast" mode
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226 without loosing my GPIB controller.)
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227
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228
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229 .. _`4.2-6.95`: http://prologix.biz/downloads/gpib-usb-4.2-6.95.zip
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230 .. _Prologix: http://prologix.biz/
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231 .. _FAQ: http://prologix.biz/gpib-usb-4.2-faq.html
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232 .. _`user manual`: http://prologix.biz/downloads/PrologixGpibUsbManual-4.2.pdf
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233 .. _pygpibtoolkit: https://www.logilab.org/project/pygpibtoolkit
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234 .. _`directory serving all the firmwares`: http://prologix.biz/downloads/
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235 .. _avrdude: http://savannah.nongnu.org/projects/avrdude/
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236 .. _avr109: http://www.atmel.com/Images/doc1644.pdf

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