Merge pull request #482 from fredizzimo/serial_link

Add serial link library

1 files changed, 69 insertions, 0 deletions

diff --git a/quantum/serial_link/protocol/frame_router.c b/quantum/serial_link/protocol/frame_router.c
new file mode 100644
index 000000000..04b8c2e75
--- /dev/null
+++ b/quantum/serial_link/protocol/frame_router.c
@@ -0,0 +1,69 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 Fred Sundvik
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#include "serial_link/protocol/frame_router.h"
+#include "serial_link/protocol/transport.h"
+#include "serial_link/protocol/frame_validator.h"
+
+static bool is_master;
+
+void router_set_master(bool master) {
+   is_master = master;
+}
+
+void route_incoming_frame(uint8_t link, uint8_t* data, uint16_t size){
+    if (is_master) {
+        if (link == DOWN_LINK) {
+            transport_recv_frame(data[size-1], data, size - 1);
+        }
+    }
+    else {
+        if (link == UP_LINK) {
+            if (data[size-1] & 1) {
+                transport_recv_frame(0, data, size - 1);
+            }
+            data[size-1] >>= 1;
+            validator_send_frame(DOWN_LINK, data, size);
+        }
+        else {
+            data[size-1]++;
+            validator_send_frame(UP_LINK, data, size);
+        }
+    }
+}
+
+void router_send_frame(uint8_t destination, uint8_t* data, uint16_t size) {
+    if (destination == 0) {
+        if (!is_master) {
+            data[size] = 1;
+            validator_send_frame(UP_LINK, data, size + 1);
+        }
+    }
+    else {
+        if (is_master) {
+            data[size] = destination;
+            validator_send_frame(DOWN_LINK, data, size + 1);
+        }
+    }
+}