Do not inhibit motion when Stopped is set.
We actually do need to move to move away the extruder from the bed, and
setting Stopped breaks it without adding any sort of security (M*
commands, such as M600 could still perform moves and still pass
through, while M104 would still set heaters).
During a hard error the internal queue is cleared (and sd file closed,
if any), so no new "unforeseen" command can be read.
Handle "Stopped" instead as a flag to inhibit serial processing and
automatically switch to "paused for user" state. While in this state
simply drop any input without incrementing the processed gcode line
number, behaving as-if the last command was still being processed.
This allows "Stopped" to correctly handle a printer-initiated paused
state and recover as expected by requesting a resend when resuming.
- code_seen("string") -> code_seen_P(PSTR("string")) saved >100B of RAM!
- serial print "." -> '.' saved some code
- extract commonly used string
- SERIAL_PROTOCOLLN("") -> SERIAL_PROTOCOLLN() as no argument is
necessary
As sdpos_atomic was not updated after printer power up and first power panic recovery, it was equal 0. When the first command from SD card was queued its size on SD card was computed as current SD index position minus sdpos_atomic. This was equal to offset from beginning of the file limited to 16 bit storage type. When next power outage occurred earlier then this command was finished and wiped out of queue, this command size (extraordinarily big) was subtracted from sdpos_atomic and saved to EEPROM. This led to up to 65536 B jump back in file printed after next power panic recovery.
sketch/cmdqueue.cpp: In function 'bool cmdqueue_pop_front()':
sketch/cmdqueue.cpp:67:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (++ bufindr; bufindr < sizeof(cmdbuffer) && cmdbuffer[bufindr] == 0; ++ bufindr) ;
^
sketch/cmdqueue.cpp: In function 'bool cmdqueue_could_enqueue_back(int, bool)':
sketch/cmdqueue.cpp:170:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
endw + CMDBUFFER_RESERVE_FRONT <= sizeof(cmdbuffer) ||
^
sketch/cmdqueue.cpp:172:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
(endw <= sizeof(cmdbuffer) && CMDBUFFER_RESERVE_FRONT <= bufindr))
^
sketch/cmdqueue.cpp:196:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
endw + CMDBUFFER_RESERVE_FRONT <= sizeof(cmdbuffer) ||
^
sketch/cmdqueue.cpp:198:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
(endw <= sizeof(cmdbuffer) && CMDBUFFER_RESERVE_FRONT <= bufindr))
^
sketch/cmdqueue.cpp: In function 'void get_command()':
sketch/cmdqueue.cpp:380:10: warning: variable 'rx_buffer_full' set but not used [-Wunused-but-set-variable]
bool rx_buffer_full = false; //flag that serial rx buffer is full
^
sketch/cmdqueue.cpp: In function 'uint16_t cmdqueue_calc_sd_length()':
sketch/cmdqueue.cpp:697:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (++ _bufindr; _bufindr < sizeof(cmdbuffer) && cmdbuffer[_bufindr] == 0; ++ _bufindr) ;
^
