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authorDidier Loiseau <didierloiseau+git@gmail.com>2016-09-11 01:26:47 +0200
committerDidier Loiseau <didierloiseau+git@gmail.com>2016-09-11 01:26:47 +0200
commitb9014c757599ca288be07629ad1d00ef66c033f1 (patch)
treeba056e704e76327c597e25d1be200c4c991efeb8 /quantum/serial_link/protocol/transport.c
parent60a826923d5a6b0dbe416b0837608149ab82e470 (diff)
parent5010df3d8b68a53c382b853c7c2e45922975b631 (diff)
Merge remote-tracking branch 'remotes/jackhumbert/master' into bépo
Diffstat (limited to 'quantum/serial_link/protocol/transport.c')
-rw-r--r--quantum/serial_link/protocol/transport.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/quantum/serial_link/protocol/transport.c b/quantum/serial_link/protocol/transport.c
new file mode 100644
index 0000000000..ff795fe201
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+++ b/quantum/serial_link/protocol/transport.c
@@ -0,0 +1,128 @@
+/*
+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/transport.h"
+#include "serial_link/protocol/frame_router.h"
+#include "serial_link/protocol/triple_buffered_object.h"
+#include <string.h>
+
+#define MAX_REMOTE_OBJECTS 16
+static remote_object_t* remote_objects[MAX_REMOTE_OBJECTS];
+static uint32_t num_remote_objects = 0;
+
+void reinitialize_serial_link_transport(void) {
+ num_remote_objects = 0;
+}
+
+void add_remote_objects(remote_object_t** _remote_objects, uint32_t _num_remote_objects) {
+ unsigned int i;
+ for(i=0;i<_num_remote_objects;i++) {
+ remote_object_t* obj = _remote_objects[i];
+ remote_objects[num_remote_objects++] = obj;
+ if (obj->object_type == MASTER_TO_ALL_SLAVES) {
+ triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer;
+ triple_buffer_init(tb);
+ uint8_t* start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
+ tb = (triple_buffer_object_t*)start;
+ triple_buffer_init(tb);
+ }
+ else if(obj->object_type == MASTER_TO_SINGLE_SLAVE) {
+ uint8_t* start = obj->buffer;
+ unsigned int j;
+ for (j=0;j<NUM_SLAVES;j++) {
+ triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
+ triple_buffer_init(tb);
+ start += LOCAL_OBJECT_SIZE(obj->object_size);
+ }
+ triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
+ triple_buffer_init(tb);
+ }
+ else {
+ uint8_t* start = obj->buffer;
+ triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
+ triple_buffer_init(tb);
+ start += LOCAL_OBJECT_SIZE(obj->object_size);
+ unsigned int j;
+ for (j=0;j<NUM_SLAVES;j++) {
+ tb = (triple_buffer_object_t*)start;
+ triple_buffer_init(tb);
+ start += REMOTE_OBJECT_SIZE(obj->object_size);
+ }
+ }
+ }
+}
+
+void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size) {
+ uint8_t id = data[size-1];
+ if (id < num_remote_objects) {
+ remote_object_t* obj = remote_objects[id];
+ if (obj->object_size == size - 1) {
+ uint8_t* start;
+ if (obj->object_type == MASTER_TO_ALL_SLAVES) {
+ start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
+ }
+ else if(obj->object_type == SLAVE_TO_MASTER) {
+ start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
+ start += (from - 1) * REMOTE_OBJECT_SIZE(obj->object_size);
+ }
+ else {
+ start = obj->buffer + NUM_SLAVES * LOCAL_OBJECT_SIZE(obj->object_size);
+ }
+ triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
+ void* ptr = triple_buffer_begin_write_internal(obj->object_size, tb);
+ memcpy(ptr, data, size - 1);
+ triple_buffer_end_write_internal(tb);
+ }
+ }
+}
+
+void update_transport(void) {
+ unsigned int i;
+ for(i=0;i<num_remote_objects;i++) {
+ remote_object_t* obj = remote_objects[i];
+ if (obj->object_type == MASTER_TO_ALL_SLAVES || obj->object_type == SLAVE_TO_MASTER) {
+ triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer;
+ uint8_t* ptr = (uint8_t*)triple_buffer_read_internal(obj->object_size + LOCAL_OBJECT_EXTRA, tb);
+ if (ptr) {
+ ptr[obj->object_size] = i;
+ uint8_t dest = obj->object_type == MASTER_TO_ALL_SLAVES ? 0xFF : 0;
+ router_send_frame(dest, ptr, obj->object_size + 1);
+ }
+ }
+ else {
+ uint8_t* start = obj->buffer;
+ unsigned int j;
+ for (j=0;j<NUM_SLAVES;j++) {
+ triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
+ uint8_t* ptr = (uint8_t*)triple_buffer_read_internal(obj->object_size + LOCAL_OBJECT_EXTRA, tb);
+ if (ptr) {
+ ptr[obj->object_size] = i;
+ uint8_t dest = j + 1;
+ router_send_frame(dest, ptr, obj->object_size + 1);
+ }
+ start += LOCAL_OBJECT_SIZE(obj->object_size);
+ }
+ }
+ }
+}