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#include "protocol.h"
#include "8b10b.h"
void receive_symbol(struct proto_rx_st *st, int symbol) {
if (symbol == -K28_1) { /* Comma/frame delimiter */
st->rxpos = 0;
/* Fall through and return and just ignore incomplete packets */
} else if (symbol == -DECODING_ERROR) {
st->rxpos = -1;
} else if (symbol < 0) { /* Unknown comma symbol or error */
st->rxpos = -1;
} else if (st->rxpos == -1) {
return;
} else if (st->rxpos == 0) { /* First data symbol, and not an error or comma symbol */
st->packet_type = symbol & ~PKT_TYPE_BULK_FLAG;
if (st->packet_type >= st->cmd_if->packet_type_max) {
st->rxpos = -1;
return;
}
st->is_bulk = symbol & PKT_TYPE_BULK_FLAG;
st->offset = (st->is_bulk) ? st->address*st->cmd_if->payload_len[st->packet_type]+1 : 2;
st->rxpos++;
} else if (!st->is_bulk && st->rxpos == 1) {
st->rxpos = (symbol == st->address) ? 2 : -1;
} else {
st->argbuf[st->rxpos - st->offset] = symbol;
st->rxpos++;
if (st->rxpos - st->offset == st->cmd_if->payload_len[st->packet_type]) {
handle_command(st->packet_type, (uint8_t *)st->argbuf);
st->rxpos = -1;
}
}
}
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