C Encoding Buffer

[MichaelBMiner]

Hello,

I am attempting to package some CAN data to send over the network. I have a question about dbcppp_SignalEncode. This function accepts a signal, raw data and a buffer. A CAN frame can have a data buffer that is 8 bytes long. No one PGN (message) holds more than 64 bits at a time.

Does this encode function shift items around in the buffer provided to ensure proper decoding? In my code I read in my DBC and save each signal in an array associated with each message id. As my program runs it will gather data and eventually will need to send it out.

static void package_and_send_can_frame(uint16_t index) {
	struct can_frame to_send;
	uint8_t i;
	memset(to_send.data, 0, sizeof(to_send.data));

	to_send.can_id = can_id_info[index].can_id;
	to_send.can_dlc = 8;

	for(i=0; i<can_id_info[index].num_spns; i++){
		uint64_t raw = dbcppp_SignalPhysToRaw(can_id_info[index].spns[i].sig, can_id_info[index].spns[i].phys);
		dbcppp_SignalEncode(can_id_info[index].spns[i].sig, raw, to_send.data);
	}

	can_ring_buffer_put_tx_data(to_send);
}

@xR3b0rn @derkomai @ByunghunLee @byunghun-ee

[MichaelBMiner]

@xR3b0rn just wondering if you had any thoughts on this.