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Add find_pid/1 #108

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Add find_pid/1 #108

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8 changes: 8 additions & 0 deletions lib/circuits_uart.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,14 @@ defmodule Circuits.UART do
|> Enum.map(&circuits_uart_info/1)
end

@spec find_pid(binary) :: pid() | nil
def find_pid(port_name) do
case find_pids() do
[{pid, ^port_name}] -> pid
_ -> nil
end
end

defp is_circuits_uart_process(pid) do
{:dictionary, dictionary} = Process.info(pid, :dictionary)
Keyword.get(dictionary, :"$initial_call") == {Circuits.UART, :init, 1}
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