content/prologix.rst

Wed, 13 Mar 2024 11:03:13 +0100

author
David Douard <david.douard@sdf3.org>
date
Wed, 13 Mar 2024 11:03:13 +0100
changeset 152
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parent 140
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permissions
-rw-r--r--

Update URLs for pcb & firmware to sourcehut

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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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6 :author: David Douard
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7 :Category: Electronics
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8 :Tags: test equipment, GPIB, Prologix
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11 Prologix_ sell several low cost GPIB controllers. I have one their old
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12 deprecated dongle "GPIB-USB Controller 4.2" and had fun with it with
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13 my pygpibtoolkit_ project.
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15 It's a very simple dongle consisting in an Atmel ATMega164P
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16 microcontroller and a FTDI FT245FL chip for the USB<->RS232
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17 convertion.
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18
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aba381b2bac9 Fix several inter-document links
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19 .. image:: {static}/images/prologix/prologix_4.2_small.jpg
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20 :alt: The Prologix GPIB-USB controller.
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22 Unfortunately, it's no longer available (I find this unfortunate
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23 because it was really cheap, and very useful for hobbyist like me).
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26 Upgrading the buggy firmware
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27 ============================
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28
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29 My controller had the version 5.2 of the firmware, which really is
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30 buggy. For example if a device on the GPIB bus is continuously sending
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31 data and the controller is in "auto" mode (in which it automatically
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32 perform a reading of the available data), then it was impossible to
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33 send it commands anymore.
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35 Unfortunately, the Prologix web site only describe the product as "No
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36 longer in production". There is still an available FAQ_ and the `user
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37 manual`_, but the firmware update procedure is not described any more.
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39 However, the `directory serving all the firmwares`_ for their products
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40 still have the firmwares for this device. The latest published version
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41 is the `4.2-6.95`_ (in fact, it's the version 6.95 of the firware for
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42 the version 4.2 of the USB-GPIB controller).
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43
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44 The content of this archive is:
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46 .. code-block:: bash
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47
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48 unzip -l ~/Downloads/gpib-usb-4.2-6.95.zip
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49 Archive: /home/david/Downloads/gpib-usb-4.2-6.95.zip
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50 Length Date Time Name
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51 --------- ---------- ----- ----
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52 244837 2007-07-08 23:57 avrdude.conf
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53 186880 2007-07-08 23:57 avrdude.exe
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54 31162 2010-09-21 10:57 m16.hex
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55 31542 2010-09-21 10:57 m164.hex
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56 61440 2010-06-16 18:21 PxUpdate.exe
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57 409 2009-01-21 11:00 readme.txt
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58 --------- -------
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59 556270 6 files
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62 Obviously, Windows stuff only, and no documentation on how to upgrade
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63 the device on Linux.
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64
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65 But the fact it uses avrdude_ is good sign it might be possible to find solutions
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66 on Linux. According the names of the hex files, it seems there have 2
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67 versions of the hardware, one with a ATMega16 and one with a
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68 ATMega164P (mine uses a 164P).
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70 Now, the question is: how is the AVR programmed? There are dozens of
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71 'backends' available on avrdude.
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72
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73 Doing a ``string`` on the main exe in the archive, PxUpdate.exe,
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74 shows a few interesting things, especially this:
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75
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76 .. code-block:: bash
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78 strings PxUpdate.exe | grep -i avr
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79 avrdude.exe -p %s -P \\.\COM%d -c avr109 -u -e -U flash:w:%s
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80 AVRBOOT
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81
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83 So we know the command line used by this firmware update tool, and we
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84 known it uses the AVR's bootloader as decribed in the AVR109_
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85 application note.
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86
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87 But any attempt to read the content of the flash using:
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88
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89 .. code-block:: bash
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91 avrdude -p m164p -c avr109 -U flash:r:flash.hex:i
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93 fails stating the avr does not respond:
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94
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95 .. code-block:: bash
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97 avrdude -P /dev/ttyUSB0 -p m164p -c avr109 -v -v -U flash:r:flash2.hex:i
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98
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99 avrdude: Version 6.1, compiled on Sep 11 2014 at 20:00:34
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100 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
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101 Copyright (c) 2007-2014 Joerg Wunsch
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102
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103 System wide configuration file is "/etc/avrdude.conf"
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104 User configuration file is "/home/david/.avrduderc"
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105 User configuration file does not exist or is not a regular file, skipping
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106
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107 Using Port : /dev/ttyUSB0
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108 Using Programmer : avr109
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109 AVR Part : ATmega164P
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110 Chip Erase delay : 55000 us
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111 PAGEL : PD7
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112 BS2 : PA0
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113 RESET disposition : dedicated
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114 RETRY pulse : SCK
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115 serial program mode : yes
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116 parallel program mode : yes
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117 Timeout : 200
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118 StabDelay : 100
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119 CmdexeDelay : 25
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120 SyncLoops : 32
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121 ByteDelay : 0
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122 PollIndex : 3
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123 PollValue : 0x53
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124 Memory Detail :
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125
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126 Block Poll Page Polled
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127 Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
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128 ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
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129 eeprom 4 10 128 0 no 512 4 0 9000 9000 0xff 0xff
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130 flash 33 6 128 0 yes 16384 128 128 4500 4500 0xff 0xff
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131 lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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132 lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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133 hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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134 signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
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135 calibration 0 0 0 0 no 4 0 0 0 0 0x00 0x00
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136
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137 Programmer Type : butterfly
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138 Description : Atmel AppNote AVR109 Boot Loader
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139
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140 Connecting to programmer: .avrdude: ser_recv(): programmer is not responding
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141 avrdude: butterfly_recv(): programmer is not responding
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142
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143
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144 So there is something else required to put the device under firmware
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3d0bed1a79c8 [prologix] typos
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145 upgrade state. I was wondering if there is an undocumented controller
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146 command (anything starting with ``++`` is interpreted as a controller
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147 command), so I searched for the ``++`` string in ``PxUpdate.exe``:
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148
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149 .. code-block:: bash
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150
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151 strings PxUpdate.exe | grep ++
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152 Microsoft Visual C++ Runtime Library
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153 ++rst
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154
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155 No magic undocumented command, but a reset of the controller is
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156 performed by this tool. Let's try this:
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157
109
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158 .. code-block:: bash
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159
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160 stty -F /dev/ttyUSB0 speed 115200 cs8 -cstopb -parenb
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161 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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162 avrdude: Version 6.1, compiled on Sep 11 2014 at 20:00:34
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163 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
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164 Copyright (c) 2007-2014 Joerg Wunsch
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165
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166 System wide configuration file is "/etc/avrdude.conf"
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167 User configuration file is "/home/david/.avrduderc"
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168 User configuration file does not exist or is not a regular file, skipping
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169
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170 Using Port : /dev/ttyUSB0
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171 Using Programmer : avr109
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172 AVR Part : ATmega164P
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173 Chip Erase delay : 55000 us
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174 PAGEL : PD7
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175 BS2 : PA0
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176 RESET disposition : dedicated
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177 RETRY pulse : SCK
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178 serial program mode : yes
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179
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180 parallel program mode : yes
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181 Timeout : 200
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182 StabDelay : 100
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183 CmdexeDelay : 25
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184 SyncLoops : 32
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185 ByteDelay : 0
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186 PollIndex : 3
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187 PollValue : 0x53
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188 Memory Detail :
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189
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190 Block Poll Page Polled
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191 Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
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192 ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
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193 eeprom 4 10 128 0 no 512 4 0 9000 9000 0xff 0xff
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194 flash 33 6 128 0 yes 16384 128 128 4500 4500 0xff 0xff
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195 lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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196 lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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197 hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
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198 signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
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199 calibration 0 0 0 0 no 4 0 0 0 0 0x00 0x00
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200
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201 Programmer Type : butterfly
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202 Description : Atmel AppNote AVR109 Boot Loader
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203
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204 Connecting to programmer: .
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205 Found programmer: Id = "AVRBOOT"; type = S
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206 Software Version = 1.0; Hardware Version = 1.0
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207 Programmer supports auto addr increment.
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208 Programmer supports buffered memory access with buffersize=128 bytes.
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209
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210 Programmer supports the following devices:
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211 Device code: 0x76
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212
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213 avrdude: devcode selected: 0x76
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214 avrdude: AVR device initialized and ready to accept instructions
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215
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216 Reading | ################################################## | 100% 0.00s
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217
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218 avrdude: Device signature = 0x1e940a
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219 avrdude: safemode: Fuse reading not support by programmer.
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220 Safemode disabled.
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221 avrdude: reading flash memory:
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222
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223 Reading | ################################################## | 100% 0.26s
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224
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225 avrdude: writing output file "flash2.hex"
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226
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227 avrdude done. Thank you.
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228
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229 **Much better!**
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230
109
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231 Now I can upgrade the firmware:
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232
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233 .. code-block:: bash
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234
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235 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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236
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237 Et voilĂ ! The Prologix GPIB-USB interface is upgraded to the latest
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238 available software. From what I've seen so far, it seems more stable
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239 (at least I can read data from my HP5442A and HP3456A in "fast" mode
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240 without loosing my GPIB controller.)
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241
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242
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243 .. _`4.2-6.95`: http://prologix.biz/downloads/gpib-usb-4.2-6.95.zip
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244 .. _Prologix: http://prologix.biz/
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245 .. _FAQ: http://prologix.biz/gpib-usb-4.2-faq.html
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246 .. _`user manual`: http://prologix.biz/downloads/PrologixGpibUsbManual-4.2.pdf
140
edef9b48311f Update pygpibtoolkit project url
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247 .. _pygpibtoolkit: https://hg.sr.ht/~douardda/pygpibtoolkit
30
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248 .. _`directory serving all the firmwares`: http://prologix.biz/downloads/
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249 .. _avrdude: http://savannah.nongnu.org/projects/avrdude/
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250 .. _avr109: http://www.atmel.com/Images/doc1644.pdf

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