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-rw-r--r--quantum/serial_link/protocol/frame_router.c69
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
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+++ b/quantum/serial_link/protocol/frame_router.c
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+/*
+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);
+ }
+ }
+}