diff options
Diffstat (limited to 'quantum/serial_link/protocol/transport.c')
| -rw-r--r-- | quantum/serial_link/protocol/transport.c | 128 |
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 --- /dev/null +++ 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); + } + } + } +} |