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verify.go
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verify.go
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// Copyright (c) 2014, Steven Stallion
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
package main
import (
"fmt"
"io/ioutil"
)
var verifyCount, verifyStart int
func init() {
cmd := &command{
name: "verify",
exec: verify,
help: `usage: eeprom verify [-start addr] [-count n] file
The verify command reads data from the device and performs a bytewise
comparison against the specified file.
The flags are:
-start addr
starting address; by default this is 0.
-count n
number of bytes to verify; by default this is the length of
the file.
`,
}
cmd.flag.IntVar(&verifyStart, "start", 0, "")
cmd.flag.IntVar(&verifyCount, "count", 0, "")
addCommand(cmd)
}
func verify(args ...string) error {
if len(args) < 1 {
return errUsage
}
file, err := ioutil.ReadFile(args[0])
if err != nil {
return err
}
d, err := openDevice()
if err != nil {
return err
}
defer d.Close()
if verifyCount == 0 || verifyCount > len(file) {
verifyCount = len(file)
}
data := make([]byte, verifyCount)
if err := d.Read(uint16(verifyStart), data); err != nil {
d.Reset()
return err
}
for i, b := range file {
if data[i] != b {
return fmt.Errorf("%s:%d: expected %#x; got %#x", args[0], i, b, data[i])
}
}
return nil
}