Mercurial > flash_v2

annotate packages/hal/arm/aeb/current/src/flash_cksum.tcl @ 76:435cced73e2f ecos-v1_3_1-release

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eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
author jlarmour
date Tue, 28 Mar 2000 14:10:45 +0000
parents
children 2085233a121a
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76
435cced73e2f eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
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1 #!/bin/sh
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2 # the next line restarts using tclsh \
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3 exec tclsh "$0" ${1+"$@"}
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4
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5 #===============================================================================
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6 #
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7 # flash_cksum.tcl
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8 #
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9 # Compute the checksum for a AEB-1 flash module
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10 #
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11 #===============================================================================
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12 #####COPYRIGHTBEGIN####
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13 #
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14 # -------------------------------------------
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15 # The contents of this file are subject to the Red Hat eCos Public License
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16 # Version 1.1 (the "License"); you may not use this file except in
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17 # compliance with the License. You may obtain a copy of the License at
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18 # http://www.redhat.com/
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19 #
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20 # Software distributed under the License is distributed on an "AS IS"
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21 # basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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22 # License for the specific language governing rights and limitations under
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23 # the License.
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24 #
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25 # The Original Code is eCos - Embedded Configurable Operating System,
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26 # released September 30, 1998.
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27 #
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28 # The Initial Developer of the Original Code is Red Hat.
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29 # Portions created by Red Hat are
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30 # Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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31 # All Rights Reserved.
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32 # -------------------------------------------
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33 #
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34 #####COPYRIGHTEND####
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35 #===============================================================================
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36 ######DESCRIPTIONBEGIN####
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37 #
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38 # Author(s): gthomas
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39 # Contact(s): gthomas
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40 # Date: 1999/01/06
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41 # Version: 0.01 $RcsVersion$
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42 # Purpose: Compute the checksum for a FLASH ROM module.
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43 # Description:
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44 # Requires: A working Tcl interpreter, V8.0 or later.
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45 # Provides: Command line operation only.
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46 # Inputs:
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47 # Side FX:
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48 # Outputs:
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49 # See also: 'Notes' which describes the process of creating the GDB stubs
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50 # module.
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51 # Known bugs:
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52 # Usage:
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53 #
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54 #####DESCRIPTIONEND####
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55 #===============================================================================
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56
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57 #
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58 # This ckecksum is the 32-bit XOR of all 32 bit words in the file.
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59 # The output of the program is a single number, suitable for use in
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60 # a Makefile/script used to create an AEB-1 module for FLASH ROM.
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61 #
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62
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63 proc checksum { name } {
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64
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65 set status [ catch {
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66 set fd [open $name "r"]
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67 fconfigure $fd -translation binary
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68 set data [read $fd]
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69 close $fd
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70 } message]
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71
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72 if { $status != 0 } {
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73 puts "Unable to read file $name: $message"
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74 exit 1
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75 }
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76
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77 set sum 0
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78 set length [string length $data]
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79 for { set i 0 } { $i < $length } { incr i 4 } {
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80 # Fetch the next 32 bit word. The funky tests are to handle the case
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81 # of zero bytes.
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82 set char0 [string index $data [expr $i + 0]]
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83 if { "$char0" != "" } {
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84 scan $char0 "%c" ascii0
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85 } else {
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86 set ascii0 0
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87 }
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88 set char1 [string index $data [expr $i + 1]]
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89 if { "$char1" != "" } {
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90 scan $char1 "%c" ascii1
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91 } else {
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92 set ascii1 0
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93 }
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94 set char2 [string index $data [expr $i + 2]]
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95 if { "$char2" != "" } {
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96 scan $char2 "%c" ascii2
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97 } else {
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98 set ascii2 0
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99 }
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100 set char3 [string index $data [expr $i + 3]]
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101 if { "$char3" != "" } {
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102 scan $char3 "%c" ascii3
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103 } else {
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104 set ascii3 0
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105 }
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106 set word [expr $ascii0 << 24]
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107 set word [expr $word | [expr $ascii1 << 16]]
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108 set word [expr $word | [expr $ascii2 << 8]]
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109 set word [expr $word | $ascii3]
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110 set sum [expr $sum ^ $word]
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111 # puts "sum: [format %8.8X $sum], word: [format %8.8X $word]"
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112 }
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113
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114 return $sum
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115 }
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116
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117 proc bswap { native } {
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118 set byte0 [expr [expr $native >> 24] & 255]
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119 set byte1 [expr [expr $native >> 16] & 255]
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120 set byte2 [expr [expr $native >> 8] & 255]
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121 set byte3 [expr [expr $native >> 0] & 255]
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122 set swapped [expr $byte3 << 24]
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123 set swapped [expr $swapped | [expr $byte2 << 16]]
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124 set swapped [expr $swapped | [expr $byte1 << 8]]
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125 set swapped [expr $swapped | [expr $byte0 << 0]]
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126 # puts "native: [format %8.8X $native], swapped: [format %8.8X $swapped]"
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127 return $swapped
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128 }
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129
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130 global tcl_platform
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131 set byteOrder $tcl_platform(byteOrder)
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132 # puts "platform byte order = $byteOrder"
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133
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134 # Parse command line arguments
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135 set argc 0
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136 array set args { }
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137 foreach arg $argv {
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138 set args([incr argc]) $arg
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139 }
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140
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141 if { "$argc" != "1" } {
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142 puts "usage: flash_cksum <file>"
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143 exit 1
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144 }
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145
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146 set cksum [checksum $args(1)]
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147
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148 # if { "$byteOrder" == "littleEndian" } {
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149 # puts "Swap bytes!"
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150 set cksum [bswap $cksum]
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151 # }
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152
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153 puts "[format 0x%8.8X $cksum]"
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154