Mcp3008 (MCP3008 ADC Library v0.1.0)
This library allows interfacing with the MCP3008 analog to digital converter module on a Raspberry PI.
Example
To get started, add the server to your supervision tree and specify a CLK port value.
def children() do
[
{Mcp3008.Server, clk_port}
]
end
Link to this section Summary
Functions
Reads from the specified channel. To read a value in differential mode, pass a tuple with the specified ports. In single mode, the channel must be a value between 0-7. Valid differential mode values are
Link to this section Functions
read_channel(channel)
Specs
read_channel(pos_integer() | {pos_integer(), pos_integer()}) :: {:ok, pos_integer()} | {:error, atom()}
Reads from the specified channel. To read a value in differential mode, pass a tuple with the specified ports. In single mode, the channel must be a value between 0-7. Valid differential mode values are:
{0, 1} => CH0+, CH1-
{1, 0} => CH0-, CH1+
{2, 3} => CH2+, CH3-
{3, 2} => CH2-, CH3+
{4, 5} => CH4+, CH5-
{5, 4} => CH4-, CH5+
{6, 7} => CH6+, CH6-
{7, 6} => CH6-, CH7+
Examples
# CH0
iex> Mcp3008.read_channel(0)
500
# {CH0 = IN+, CH1 = IN-}
iex> Mcp3008.read_channel({0, 1})
500
# {CH0 = IN-, CH1 = IN+}
iex> Mcp3008.read_channel({1, 0})
500