src/isotp/isotp.c

   1 #include <isotp/isotp.h>
   2
   3 const uint16_t MAX_ISO_TP_MESSAGE_SIZE = 4096;
   4 const uint16_t MAX_CAN_FRAME_SIZE = 8;
   5 const uint8_t ISO_TP_DEFAULT_RESPONSE_TIMEOUT = 100;
   6 const bool ISO_TP_DEFAULT_FRAME_PADDING_STATUS = true;
   7
   8 void isotp_receive_can_frame(const uint16_t arbitration_id, const uint8_t* data,
   9         const uint8_t length) {
  10     //match with any request we made
  11     //handle flow control if necessary
  12     //call callback if message completed
  13 }
  14
  15 bool isotp_send(const uint8_t* payload, uint16_t payload_size) {
  16      // we determine if it's single/multi frame and start the send
  17 }
  18
  19 void isotp_set_timeout(IsoTpHandler* handler, uint16_t timeout_ms) {
  20     handler->timeout_ms = timeout_ms;
  21 }
  22
  23 IsoTpShims isotp_init_shims(LogShim log, SendCanMessageShim send_can_message,
  24         SetTimerShim set_timer) {
  25     IsoTpShims shims = {
  26         log: log,
  27         send_can_message: send_can_message,
  28         set_timer: set_timer
  29     };
  30     return shims;
  31 }
  32
  33 IsoTpHandler isotp_init(IsoTpShims* shims, uint16_t arbitration_id,
  34         IsoTpMessageReceivedHandler message_received_callback,
  35         IsoTpMessageSentHandler message_sent_callback,
  36         IsoTpCanFrameSentHandler can_frame_sent_callback) {
  37     IsoTpHandler handler = {
  38         shims: shims,
  39         message_received_callback: message_received_callback,
  40         message_sent_callback: message_sent_callback,
  41         can_frame_sent_callback: can_frame_sent_callback,
  42         timeout_ms: ISO_TP_DEFAULT_RESPONSE_TIMEOUT,
  43         frame_padding: ISO_TP_DEFAULT_FRAME_PADDING_STATUS,
  44         sending: false
  45     };
  46     return handler;
  47 }
  48
  49 // TODO this would be better as a "isotp_message_to_string"
  50 void log_isotp_message(const uint16_t arbitration_id,
  51         const uint8_t* payload, const uint16_t size) {
  52     debug("ID: 0x%02x, Payload:", arbitration_id);
  53     for(int i = 0; i < size; i++) {
  54         debug("0x%x", payload[i]);
  55     }
  56 }