diff options
author | Christopher Peplin <chris.peplin@rhubarbtech.com> | 2013-12-31 12:59:04 -0500 |
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committer | Christopher Peplin <chris.peplin@rhubarbtech.com> | 2013-12-31 12:59:04 -0500 |
commit | 10a35b0a7c380d77cdd24ac90d6aa0abd4601f3e (patch) | |
tree | 5f768c8425e99006fc2a7cc7866b932600ae2074 /src/isotp/isotp.c | |
parent | 90209462aa40f17b24ef91864070b522b6df1b14 (diff) |
Draft reworking of API.
Diffstat (limited to 'src/isotp/isotp.c')
-rw-r--r-- | src/isotp/isotp.c | 76 |
1 files changed, 56 insertions, 20 deletions
diff --git a/src/isotp/isotp.c b/src/isotp/isotp.c index f303e214..f5b20795 100644 --- a/src/isotp/isotp.c +++ b/src/isotp/isotp.c @@ -7,10 +7,14 @@ const uint16_t MAX_CAN_FRAME_SIZE = 8; const uint8_t ISO_TP_DEFAULT_RESPONSE_TIMEOUT = 100; const bool ISO_TP_DEFAULT_FRAME_PADDING_STATUS = true; +// TODO why isn't this picked up from the header? +extern IsoTpHandle isotp_receive(IsoTpShims* shims, const uint16_t arbitration_id, + IsoTpMessageReceivedHandler callback); -void isotp_set_timeout(IsoTpHandler* handler, uint16_t timeout_ms) { - handler->timeout_ms = timeout_ms; -} + +/* void isotp_set_timeout(IsoTpHandler* handler, uint16_t timeout_ms) { */ + /* handler->timeout_ms = timeout_ms; */ +/* } */ IsoTpShims isotp_init_shims(LogShim log, SendCanMessageShim send_can_message, SetTimerShim set_timer) { @@ -22,26 +26,58 @@ IsoTpShims isotp_init_shims(LogShim log, SendCanMessageShim send_can_message, return shims; } -IsoTpHandler isotp_init(IsoTpShims* shims, uint16_t arbitration_id, - IsoTpMessageReceivedHandler message_received_callback, - IsoTpMessageSentHandler message_sent_callback, - IsoTpCanFrameSentHandler can_frame_sent_callback) { - IsoTpHandler handler = { - shims: shims, - arbitration_id: arbitration_id, - message_received_callback: message_received_callback, - message_sent_callback: message_sent_callback, - can_frame_sent_callback: can_frame_sent_callback, - timeout_ms: ISO_TP_DEFAULT_RESPONSE_TIMEOUT, - frame_padding: ISO_TP_DEFAULT_FRAME_PADDING_STATUS, - sending: false - }; - return handler; -} - void isotp_message_to_string(const IsoTpMessage* message, char* destination, size_t destination_length) { snprintf(destination, destination_length,"ID: 0x%02x, Payload: 0x%llx", // TODO the payload may be backwards here message->arbitration_id, message->payload); } + +void isotp_receive_can_frame(IsoTpShims* shims, IsoTpHandle* handle, + const uint16_t arbitration_id, const uint8_t data[], + const uint8_t data_length) { + if(data_length < 1) { + return; + } + + if(handle->type == ISOTP_HANDLE_RECEIVING) { + if(handle->receive_handle.arbitration_id != arbitration_id) { + return; + } + } else if(handle->type == ISOTP_HANDLE_SENDING) { + if(handle->send_handle.receiving_arbitration_id != arbitration_id) { + return; + } + } else { + shims->log("The ISO-TP handle is corrupt"); + } + + IsoTpProtocolControlInformation pci = (IsoTpProtocolControlInformation) + get_nibble(data, data_length, 0); + + uint8_t payload_length = get_nibble(data, data_length, 1); + uint8_t payload[payload_length]; + if(payload_length > 0 && data_length > 0) { + memcpy(payload, &data[1], payload_length); + } + + // TODO this is set up to handle rx a response with a payload, but not to + // handle flow control responses for multi frame messages that we're in the + // process of sending + + switch(pci) { + case PCI_SINGLE: { + IsoTpMessage message = { + arbitration_id: arbitration_id, + payload: payload, + size: payload_length + }; + + isotp_handle_single_frame(handle, &message); + break; + } + default: + shims->log("Only single frame messages are supported"); + break; + } +} |