// SLIP parse a single character
static void ICACHE_FLASH_ATTR
slip_parse_char(char c) {
if (!slip_inpkt) {
if (c == SLIP_START) {
if (slip_len > 0) console_process(slip_buf, slip_len);
slip_reset();
slip_inpkt = true;
DBG("SLIP: start\n");
return;
}
} else if (slip_escaped) {
// prev char was SLIP_REPL
c = SLIP_ESC(c);
slip_escaped = false;
} else {
switch (c) {
case SLIP_REPL:
slip_escaped = true;
return;
case SLIP_END:
// end of packet, process it and get ready for next one
if (slip_len > 0) slip_process();
slip_reset();
return;
case SLIP_START:
os_printf("SLIP: got SLIP_START while in packet?\n");
//os_printf("SLIP: rcv %d:", slip_len);
//for (int i=0; i<slip_len; i++) os_printf(" %02x", slip_buf[i]);
//os_printf("\n");
slip_reset();
return;
}
}
if (slip_len < SLIP_MAX) slip_buf[slip_len++] = c;
}
// SLIP parse a single character
static void ICACHE_FLASH_ATTR
slip_parse_char(char c) {
if (c == SLIP_END) {
// either start or end of packet, process whatever we may have accumulated
DBG("SLIP: start or end len=%d inpkt=%d\n", slip_len, slip_inpkt);
if (slip_len > 0) {
if (slip_len > 2 && slip_inpkt) slip_process();
else console_process(slip_buf, slip_len);
}
slip_reset();
} else if (slip_escaped) {
// prev char was SLIP_ESC
if (c == SLIP_ESC_END) c = SLIP_END;
if (c == SLIP_ESC_ESC) c = SLIP_ESC;
if (slip_len < SLIP_MAX) slip_buf[slip_len++] = c;
slip_escaped = false;
} else if (slip_inpkt && c == SLIP_ESC) {
slip_escaped = true;
} else {
if (slip_len == 1 && slip_printable(slip_buf[0]) && slip_printable(c)) {
// start of packet and it's a printable character, we're gonna assume that this is console text
slip_inpkt = false;
}
if (slip_len < SLIP_MAX) slip_buf[slip_len++] = c;
}
}
// callback with a buffer of characters that have arrived on the uart
void ICACHE_FLASH_ATTR
slip_parse_buf(char *buf, short length) {
// do SLIP parsing
for (short i=0; i<length; i++)
slip_parse_char(buf[i]);
// if we're in-between packets (debug console) then print it now
if (!slip_inpkt && length > 0) {
slip_process();
slip_reset();
}
}
