53 lines
821 B
Go
53 lines
821 B
Go
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package main
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import (
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"flag"
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"os"
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"git.sr.ht/~kisom/goutils/die"
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)
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// size of a kilobit in bytes
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const kilobit = 128
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const pageSize = 4096
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func main() {
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size := flag.Int("s", 256*kilobit, "size of EEPROM image in kilobits")
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fill := flag.Uint("f", 0, "byte to fill image with")
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flag.Parse()
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if *fill > 256 {
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die.With("`fill` argument must be a byte value")
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}
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path := "eeprom.img"
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if flag.NArg() > 0 {
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path = flag.Arg(0)
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}
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fillByte := uint8(*fill)
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buf := make([]byte, pageSize)
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for i := 0; i < pageSize; i++ {
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buf[i] = fillByte
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}
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pages := *size / pageSize
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last := *size % pageSize
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file, err := os.Create(path)
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die.If(err)
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defer file.Close()
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for i := 0; i < pages; i++ {
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_, err = file.Write(buf)
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die.If(err)
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}
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if last != 0 {
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_, err = file.Write(buf[:last])
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die.If(err)
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}
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}
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