48 lines
No EOL
1.1 KiB
Lua
48 lines
No EOL
1.1 KiB
Lua
I2CSCAN = {}
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function I2CSCAN.scan()
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STMP.i2c.init()
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STMP.i2c.set_speed(true)
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for i = 2, 254, 2 do
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if STMP.i2c.transmit(i, {}, true) then
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print(string.format("%#x OK", i))
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end
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end
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end
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-- if file is nil, return array
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-- if size is nil, dump the whole EEPROM
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function I2CSCAN.dump_rom(file, size)
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STMP.i2c.init()
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STMP.i2c.set_speed(true)
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if not STMP.i2c.transmit(0xa0, {0, 0}, false) then
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error("Cannot send address")
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end
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local res = {}
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if size == nil then
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size = 0xffff
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end
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for i = 0, size do
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local l = STMP.i2c.receive(0xa0, 1)
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if l == nil then
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error("error during transfer")
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end
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for i = 1, #l do
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table.insert(res, l[i])
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end
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end
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if file == nil then
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return res
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end
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local f = file
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if type(file) == "string" then
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f = io.open(file, "w")
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end
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if f == nil then error("Cannot open file or write to nil") end
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for i = 1, #res do
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f:write(string.char(res[i]))
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end
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if type(file) == "string" then
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io.close(f)
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end
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end |