@@ -56,6 +56,31 @@ fn pinSet(comptime pin: u16, comptime level: PinLevel) !void {
try value.writeAll(if (level == .high) "1" else "0");
}
fn pinGet(comptime pin: u16) !PinLevel {
var dir = try std.fs.openDirAbsolute(DIR, .{});
defer dir.close();
const pinvalue = std.fmt.comptimePrint("gpio{}/value", .{pin});
var value = try dir.openFile(pinvalue, .{ .mode = .read_only });
defer value.close();
var buf: [2]u8 = undefined;
const c = try value.read(&buf);
return if (c > 0 and buf[0] == '1') .high else .low;
}
/// Returns the value the pin was set to
fn pinToggle(comptime pin: u16) !PinLevel {
switch (try pinGet(pin)) {
.high => {
try pinLow(pin);
return .low;
},
.low => {
try pinHigh(pin);
return .high;
},
}
}
fn pinLow(comptime pin: u16) !void {
try pinSet(pin, .low);
}