Separation Generator to a dedicated repo

Change-Id: Id94831651c3266861435272a6e36c7884bef2c45
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

1 files changed, 165 insertions, 0 deletions

diff --git a/libs/uds-c/src/uds/uds.h b/libs/uds-c/src/uds/uds.h
new file mode 100644
index 0000000..4305834
--- /dev/null
+++ b/libs/uds-c/src/uds/uds.h
@@ -0,0 +1,165 @@
+#ifndef __UDS_H__
+#define __UDS_H__
+
+#include <uds/uds_types.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#define OBD2_FUNCTIONAL_BROADCAST_ID 0x7df
+#define OBD2_FUNCTIONAL_RESPONSE_START 0x7e8
+#define OBD2_FUNCTIONAL_RESPONSE_COUNT 8
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Public: Initialize an DiagnosticShims with the given callback functions.
+ *
+ * If any callbacks are not to be used, set them to NULL. For documentation of
+ * the function type signatures, see higher up in this header file. This struct
+ * is a handy encapsulation used to pass the shims around to the various
+ * diagnostic_* functions.
+ *
+ * Returns a struct with the fields initailized to the callbacks.
+ */
+DiagnosticShims diagnostic_init_shims(LogShim log,
+        SendCanMessageShim send_can_message,
+        SetTimerShim set_timer);
+
+/* Public: Generate a new diagnostic request, send the first CAN message frame
+ * and set up the handle required to process the response via
+ * diagnostic_receive_can_frame(...).
+ *
+ * shims -  Low-level shims required to send CAN messages, etc.
+ * request -
+ * callback - an optional function to be called when the response is receved
+ *      (use NULL if no callback is required).
+ *
+ * Returns a handle to be used with diagnostic_receive_can_frame to complete
+ * sending the request and receive the response. The 'completed' field in the
+ * returned DiagnosticRequestHandle will be true when the message is completely
+ * sent. The first frame of the message will already be sent.
+ */
+DiagnosticRequestHandle diagnostic_request(DiagnosticShims* shims,
+        DiagnosticRequest* request, DiagnosticResponseReceived callback);
+
+/* Public: Generate the handle for a new diagnostic request, but do not send any
+ * data to CAN yet - you must call start_diagnostic_request(...) on the handle
+ * returned from this function actually kick off the request.
+ *
+ * shims -  Low-level shims required to send CAN messages, etc.
+ * request -
+ * callback - an optional function to be called when the response is receved
+ *      (use NULL if no callback is required).
+ *
+ * Returns a handle to be used with start_diagnostic_request and then
+ * diagnostic_receive_can_frame to complete sending the request and receive the
+ * response. The 'completed' field in the returned DiagnosticRequestHandle will
+ * be true when the message is completely sent.
+ */
+DiagnosticRequestHandle generate_diagnostic_request(DiagnosticShims* shims,
+        DiagnosticRequest* request, DiagnosticResponseReceived callback);
+
+/* Public: Send the first frame of the request to CAN for the handle, generated
+ * by generate_diagnostic_request.
+ *
+ * You can also call this method to re-do the request for a handle that has
+ * already completed.
+ */
+void start_diagnostic_request(DiagnosticShims* shims,
+                DiagnosticRequestHandle* handle);
+
+/* Public: Request a PID from the given arbitration ID, determining the mode
+ * automatically based on the PID type.
+ *
+ * shims -  Low-level shims required to send CAN messages, etc.
+ * pid_request_type - either DIAGNOSTIC_STANDARD_PID (will use mode 0x1 and 1
+ *      byte PIDs) or DIAGNOSTIC_ENHANCED_PID (will use mode 0x22 and 2 byte
+ *      PIDs)
+ * arbitration_id - The arbitration ID to send the request to.
+ * pid - The PID to request from the other node.
+ * callback - an optional function to be called when the response is receved
+ *      (use NULL if no callback is required).
+ *
+ * Returns a handle to be used with diagnostic_receive_can_frame to complete
+ * sending the request and receive the response. The 'completed' field in the
+ * returned DiagnosticRequestHandle will be true when the message is completely
+ * sent.
+ */
+DiagnosticRequestHandle diagnostic_request_pid(DiagnosticShims* shims,
+        DiagnosticPidRequestType pid_request_type, uint32_t arbitration_id,
+        uint16_t pid, DiagnosticResponseReceived callback);
+
+/* Public: Continue to send and receive a single diagnostic request, based on a
+ * freshly received CAN message.
+ *
+ * shims -  Low-level shims required to send CAN messages, etc.
+ * handle - A DiagnosticRequestHandle previously returned by one of the
+ *      diagnostic_request*(..) functions.
+ * arbitration_id - The arbitration_id of the received CAN message.
+ * data - The data of the received CAN message.
+ * size - The size of the data in the received CAN message.
+ *
+ * Returns true if the request was completed and response received, or the
+ * request was otherwise cancelled. Check the 'success' field of the handle to
+ * see if it was successful.
+ */
+DiagnosticResponse diagnostic_receive_can_frame(DiagnosticShims* shims,
+        DiagnosticRequestHandle* handle,
+        const uint32_t arbitration_id, const uint8_t data[],
+        const uint8_t size);
+
+/* Public: Parse the entier payload of the reponse as a single integer.
+ *
+ * response - the received DiagnosticResponse.
+ */
+int diagnostic_payload_to_integer(const DiagnosticResponse* response);
+
+/* Public: Render a DiagnosticResponse as a string into the given buffer.
+ *
+ * response - the response to convert to a string, for debug logging.
+ * destination - the target string buffer.
+ * destination_length - the size of the destination buffer, i.e. the max size
+ *      for the rendered string.
+ */
+void diagnostic_response_to_string(const DiagnosticResponse* response,
+        char* destination, size_t destination_length);
+
+/* Public: Render a DiagnosticRequest as a string into the given buffer.
+ *
+ * request - the request to convert to a string, for debug logging.
+ * destination - the target string buffer.
+ * destination_length - the size of the destination buffer, i.e. the max size
+ *      for the rendered string.
+ */
+void diagnostic_request_to_string(const DiagnosticRequest* request,
+        char* destination, size_t destination_length);
+
+/* Public: For many OBD-II PIDs with a numerical result, translate a diagnostic
+ * response payload into a meaningful number using the standard formulas.
+ *
+ * Functions pulled from http://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_01
+ *
+ * Returns the translated value or 0 if the PID is not in the OBD-II standard or
+ * does not use a numerical value (e.g. VIN).
+ */
+float diagnostic_decode_obd2_pid(const DiagnosticResponse* response);
+
+/* Public: Returns true if the "fingerprint" of the two diagnostic messages
+ * matches - the arbitration_id, mode and pid (or lack of pid).
+ */
+bool diagnostic_request_equals(const DiagnosticRequest* ours,
+        const DiagnosticRequest* theirs);
+
+/* Public: Returns true if the request has been completely sent - if false, make
+ * sure you called start_diagnostic_request once to start it, and then pass
+ * incoming CAN messages to it with diagnostic_receive_can_frame(...) so it can
+ * continue the ISO-TP transfer.
+ */
+bool diagnostic_request_sent(DiagnosticRequestHandle* handle);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // __UDS_H__