Add master to slave transport

serial_link/protocol/transport.c

@@ -23,18 +23,43 @@ SOFTWARE.
 */
 
 #include "protocol/transport.h"
+#include "protocol/frame_router.h"
+#include "protocol/triple_buffered_object.h"
 
-static remote_object_t* remote_objects;
+static remote_object_t** remote_objects;
 static uint32_t num_remote_objects;
 
-void init_transport(remote_object_t* _remote_objects, uint32_t _num_remote_objects) {
+void init_transport(remote_object_t** _remote_objects, uint32_t _num_remote_objects) {
     remote_objects = _remote_objects;
     num_remote_objects = _num_remote_objects;
 }
 
 void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size) {
-
+    uint8_t id = data[size-1];
+    remote_object_t* obj = remote_objects[id];
+    if (obj->object_type == MASTER_TO_ALL_SLAVES) {
+        uint8_t* start = obj->buffer + 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);
+    }
 }
 
 uint32_t transport_send_frame(uint8_t to, uint8_t* data, uint16_t size) {
 }
+
+void update_transport(void) {
+    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) {
+            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;
+                router_send_frame(0xFF, ptr, obj->object_size + 1);
+            }
+        }
+    }
+}

serial_link/protocol/transport.h

@@ -68,9 +68,21 @@ typedef struct { \
         } \
     }; \
     type* begin_write_##name(void) { \
+        remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
+        triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer; \
+        return (type*)triple_buffer_begin_write_internal(sizeof(type) + LOCAL_OBJECT_EXTRA, tb); \
     }\
     void end_write_##name(void) { \
+        remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
+        triple_buffer_object_t* tb = (triple_buffer_object_t*)obj->buffer; \
+        triple_buffer_end_write_internal(tb); \
         signal_data_written(); \
+    }\
+    type* read_##name(void) { \
+        remote_object_t* obj = (remote_object_t*)&remote_object_##name; \
+        uint8_t* start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);\
+        triple_buffer_object_t* tb = (triple_buffer_object_t*)start; \
+        return triple_buffer_read_internal(obj->object_size, tb); \
     }
 
 #define MASTER_TO_SINGLE_SLAVE_OBJECT(name, type) \
@@ -103,11 +115,9 @@ typedef struct { \
 
 #define REMOTE_OBJECT(name) (remote_object_t*)&remote_object_##name
 
-void init_transport(remote_object_t* remote_objects, uint32_t num_remote_objects);
+void init_transport(remote_object_t** remote_objects, uint32_t num_remote_objects);
 void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size);
 uint32_t transport_send_frame(uint8_t to, uint8_t* data, uint16_t size);
-
-void transport_register_master_remote_object(uint8_t id, void* ptr, uint16_t size);
-void transport_register_slave_remote_object(uint8_t id, void* ptr, uint16_t size);
+void update_transport(void);
 
 #endif

serial_link/tests/transport_tests.c

@@ -25,11 +25,21 @@ SOFTWARE.
 #include <cgreen/cgreen.h>
 #include <cgreen/mocks.h>
 #include "protocol/transport.c"
+#include "protocol/triple_buffered_object.c"
 
 void signal_data_written(void) {
     mock();
 }
 
+static uint8_t sent_data[2048];
+static uint16_t sent_data_size;
+
+void router_send_frame(uint8_t destination, uint8_t* data, uint16_t size) {
+    mock(destination);
+    memcpy(sent_data + sent_data_size, data, size);
+    sent_data_size += size;
+}
+
 typedef struct {
     uint32_t test;
 } test_object1_t;
@@ -51,7 +61,8 @@ remote_object_t* test_remote_objects[] = {
 
 Describe(Transport);
 BeforeEach(Transport) {
-    init_transport(remote_objects, sizeof(remote_objects) / sizeof(remote_object_t));
+    init_transport(test_remote_objects, sizeof(test_remote_objects) / sizeof(remote_object_t*));
+    sent_data_size = 0;
 }
 AfterEach(Transport) {}
 
@@ -66,3 +77,18 @@ Ensure(Transport, write_to_local_signals_an_event) {
     expect(signal_data_written);
     end_write_master_to_single_slave(1);
 }
+
+Ensure(Transport, writes_from_master_to_all_slaves) {
+    update_transport();
+    test_object1_t* obj = begin_write_master_to_slave();
+    obj->test = 5;
+    expect(signal_data_written);
+    end_write_master_to_slave();
+    expect(router_send_frame,
+            when(destination, is_equal_to(0xFF)));
+    update_transport();
+    transport_recv_frame(0, sent_data, sent_data_size);
+    test_object1_t* obj2 = read_master_to_slave();
+    assert_that(obj2, is_not_equal_to(NULL));
+    assert_that(obj2->test, is_equal_to(5));
+}