diff --git a/serial_link/protocol/triple_buffered_object.c b/serial_link/protocol/triple_buffered_object.c new file mode 100644 index 00000000..f5600364 --- /dev/null +++ b/serial_link/protocol/triple_buffered_object.c @@ -0,0 +1,33 @@ +/* +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 "protocol/triple_buffered_object.h" + +void triple_buffer_write(uint16_t object_size, triple_buffer_object_t* object, void* src) { + memcpy(object->buffer, src, object_size); +} + +void triple_buffer_read(uint16_t object_size, triple_buffer_object_t* object, void* dst) { + memcpy(dst, object->buffer, object_size); +} diff --git a/serial_link/protocol/triple_buffered_object.h b/serial_link/protocol/triple_buffered_object.h new file mode 100644 index 00000000..ebdbcae7 --- /dev/null +++ b/serial_link/protocol/triple_buffered_object.h @@ -0,0 +1,37 @@ +/* +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. +*/ + +#ifndef SERIAL_LINK_TRIPLE_BUFFERED_OBJECT_H +#define SERIAL_LINK_TRIPLE_BUFFERED_OBJECT_H + +typedef struct { + uint8_t state; + uint8_t buffer[]; +}triple_buffer_object_t; + +void triple_buffer_write(uint16_t object_size, triple_buffer_object_t* object, void* src); +void triple_buffer_read(uint16_t object_size, triple_buffer_object_t* object, void* dst); + + +#endif diff --git a/serial_link/tests/triple_buffered_object_tests.c b/serial_link/tests/triple_buffered_object_tests.c new file mode 100644 index 00000000..66dcefa7 --- /dev/null +++ b/serial_link/tests/triple_buffered_object_tests.c @@ -0,0 +1,44 @@ +/* +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 +#include "protocol/triple_buffered_object.c" + +Describe(TripleBufferedObject); +BeforeEach(TripleBufferedObject) {} +AfterEach(TripleBufferedObject) {} + +typedef struct { + uint8_t state; + uint32_t buffer[3]; +}test_object_t; + +Ensure(TripleBufferedObject, writes_and_and_reads_object) { + test_object_t test_object; + uint32_t src = 0x3456ABCC; + uint32_t dst; + triple_buffer_write(4, (triple_buffer_object_t*)&test_object, &src); + triple_buffer_read(4, (triple_buffer_object_t*)&test_object, &dst); + assert_that(dst, is_equal_to(src)); +}