Commit d9d3a81b authored by Marcus Greiff's avatar Marcus Greiff
Browse files

Add functional GPIO code for writing high/low to any pin

parent 8db93c0d
......@@ -3,9 +3,10 @@
# read(::T, identifier)
include("SysLED.jl")
include("GPIO.jl")
#List of available devices and their constructors
const DEVICES = Dict("sysled" => SysLED())
const DEVICES = Dict("sysled" => SysLED(), "gpio" => GPIO())
"""
dev = getdev(devname)
......
"""
Lowest form of communication woth the GPIO pins. The available pins are
listed in the "channel" parameter, and appear as directories in /sys/class.
Any of these GPIOs can be run in various ways, with any operation specified
by a sequence of three entries
(channel, operation, entry) = (int32, int32, String)
For instance, if the GPIO "gpio30" is to be configured as a output pin and set
to high, the following two writes aould be done.
write!(GPIO, 14, 2, "out")
write!(GPIO, 14, 1, "1")
"""
struct GPIO
end
writeOperations = [
Dict("dir" => "value", "entries"=>["1", "0"])
Dict("dir" => "direction", "entries"=>["in", "out"])
]
readOperations = [
"value"
"direction"
"edge"
]
channels =[
"gpio112"
"gpio114"
"gpio115"
"gpio116"
"gpio14"
"gpio15"
"gpio2"
"gpio20"
"gpio22"
"gpio23"
"gpio26"
"gpio27"
"gpio3"
"gpio30"
"gpio31"
"gpio4"
"gpio44"
"gpio45"
"gpio46"
"gpio47"
"gpio48"
"gpio49"
"gpio5"
"gpio50"
"gpio51"
"gpio60"
"gpio61"
"gpio65"
"gpio66"
"gpio67"
"gpio68"
"gpio69"
"gpio7"
]
function write!(::GPIO, index::Int32, operation::Int32, entry::Bool)
(index <= 0 || index > length(channels)) && error("Invalid GPIO index: $index")
(operation <= 0 || operation > length(writeOperations)) && error("Invalid GPIO operation: $operation")
filename = "/sys/class/gpio/$(channels[index])/$(writeOperations[operation]["dir"])"
value = writeOperations[operation]["entries"][entry ? 1 : 2]
file = open(filename, "r+")
write(file, "$(value)")
close(file)
return
end
#function Base.read(::SysLED, ind::Int32)
# (ind < 0 || ind > length(channels)) && error("Invalid SysLEND ind: $ind")
# println("not yet supported")
# l = 0
# return l == "1"
#end
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