gpio: allow specifying the digital logical pin number as required

pin_test.go

@@ -0,0 +1,29 @@
+package embd
+
+import "testing"
+
+func TestPinMapLookup(t *testing.T) {
+	var tests = []struct {
+		key interface{}
+		id  string
+	}{
+		{"10", "P1_1"},
+		{10, "P1_1"},
+		{"P1_2", "P1_2"},
+		{"GPIO10", "P1_2"},
+	}
+	var pinMap = PinMap{
+		&PinDesc{ID: "P1_1", Aliases: []string{"AN1", "10"}},
+		&PinDesc{ID: "P1_2", Aliases: []string{"GPIO10"}},
+	}
+	for _, test := range tests {
+		pd, found := pinMap.Lookup(test.key)
+		if !found {
+			t.Errorf("Could not find a descriptor for %q", test.key)
+			continue
+		}
+		if pd.ID != test.id {
+			t.Errorf("Looking up %q: got %v, want %v", test.key, pd.ID, test.id)
+		}
+	}
+}