Firmware/Marlin/malyanlcd.cpp

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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* malyanlcd.cpp
*
* LCD implementation for Malyan's LCD, a separate ESP8266 MCU running
* on Serial1 for the M200 board. This module outputs a pseudo-gcode
* wrapped in curly braces which the LCD implementation translates into
* actual G-code commands.
*
* Added to Marlin for Mini/Malyan M200
* Unknown commands as of Jan 2018: {H:}
* Not currently implemented:
* {E:} when sent by LCD. Meaning unknown.
*
* Notes for connecting to boards that are not Malyan:
* The LCD is 3.3v, so if powering from a RAMPS 1.4 board or
* other 5v/12v board, use a buck converter to power the LCD and
* the 3.3v side of a logic level shifter. Aux1 on the RAMPS board
* has Serial1 and 12v, making it perfect for this.
* Copyright (c) 2017 Jason Nelson (xC0000005)
*/
#include "MarlinConfig.h"
#if ENABLED(MALYAN_LCD)
#include "cardreader.h"
#include "SdFatConfig.h"
#include "temperature.h"
#include "planner.h"
#include "stepper.h"
#include "duration_t.h"
#include "printcounter.h"
#include "gcode.h"
#include "configuration_store.h"
#include "Marlin.h"
// On the Malyan M200, this will be Serial1. On a RAMPS board,
// it might not be.
#define LCD_SERIAL Serial1
// This is based on longest sys command + a filename, plus some buffer
// in case we encounter some data we don't recognize
// There is no evidence a line will ever be this long, but better safe than sory
#define MAX_CURLY_COMMAND (32 + LONG_FILENAME_LENGTH) * 2
// Track incoming command bytes from the LCD
int inbound_count;
// Everything written needs the high bit set.
void write_to_lcd_P(const char * const message) {
char encoded_message[MAX_CURLY_COMMAND];
uint8_t message_length = min(strlen_P(message), sizeof(encoded_message));
for (uint8_t i = 0; i < message_length; i++)
encoded_message[i] = pgm_read_byte(message[i]) | 0x80;
LCD_SERIAL.Print::write(encoded_message, message_length);
}
void write_to_lcd(const char * const message) {
char encoded_message[MAX_CURLY_COMMAND];
const uint8_t message_length = min(strlen(message), sizeof(encoded_message));
for (uint8_t i = 0; i < message_length; i++)
encoded_message[i] = message[i] | 0x80;
LCD_SERIAL.Print::write(encoded_message, message_length);
}
/**
* Process an LCD 'C' command.
* These are currently all temperature commands
* {C:T0190}
* Set temp for hotend to 190
* {C:P050}
* Set temp for bed to 50
*
* the command portion begins after the :
*/
void process_lcd_c_command(const char* command) {
switch (command[0]) {
case 'T': {
// M104 S<temperature>
char cmd[20];
sprintf_P(cmd, PSTR("M104 S%s"), command + 1);
enqueue_and_echo_command_now(cmd, false);
} break;
case 'P': {
// M140 S<temperature>
char cmd[20];
sprintf_P(cmd, PSTR("M140 S%s"), command + 1);
enqueue_and_echo_command_now(cmd, false);
} break;
default:
SERIAL_ECHOLNPAIR("UNKNOWN C COMMAND", command);
return;
}
}
/**
* Process an LCD 'B' command.
* {B:0} results in: {T0:008/195}{T1:000/000}{TP:000/000}{TQ:000C}{TT:000000}
* T0/T1 are hot end temperatures, TP is bed, TQ is percent, and TT is probably
* time remaining (HH:MM:SS). The UI can't handle displaying a second hotend,
* but the stock firmware always sends it, and it's always zero.
*/
void process_lcd_eb_command(const char* command) {
char elapsed_buffer[10];
duration_t elapsed;
bool has_days;
uint8_t len;
switch (command[0]) {
case '0': {
elapsed = print_job_timer.duration();
sprintf_P(elapsed_buffer, PSTR("%02u%02u%02u"), uint16_t(elapsed.hour()), uint16_t(elapsed.minute()) % 60UL, elapsed.second());
char message_buffer[MAX_CURLY_COMMAND];
sprintf_P(message_buffer,
PSTR("{T0:%03.0f/%03i}{T1:000/000}{TP:%03.0f/%03i}{TQ:%03i}{TT:%s}"),
thermalManager.degHotend(0),
thermalManager.degTargetHotend(0),
thermalManager.degBed(),
thermalManager.degTargetBed(),
card.percentDone(),
elapsed_buffer);
write_to_lcd(message_buffer);
} break;
default:
SERIAL_ECHOLNPAIR("UNKNOWN E/B COMMAND", command);
return;
}
}
/**
* Process an LCD 'J' command.
* These are currently all movement commands.
* The command portion begins after the :
* Move X Axis
*
* {J:E}{J:X-200}{J:E}
* {J:E}{J:X+200}{J:E}
* X, Y, Z, A (extruder)
*/
void process_lcd_j_command(const char* command) {
static bool steppers_enabled = false;
char axis = command[0];
switch (axis) {
case 'E':
// enable or disable steppers
// switch to relative
enqueue_and_echo_command_now("G91");
enqueue_and_echo_command_now(steppers_enabled ? "M18" : "M17");
steppers_enabled = !steppers_enabled;
break;
case 'A':
axis = 'E';
// fallthru
case 'Y':
case 'Z':
case 'X': {
// G0 <AXIS><distance>
// The M200 class UI seems to send movement in .1mm values.
char cmd[20];
sprintf_P(cmd, PSTR("G1 %c%03.1f"), axis, atof(command + 1) / 10.0);
enqueue_and_echo_command_now(cmd);
} break;
default:
SERIAL_ECHOLNPAIR("UNKNOWN J COMMAND", command);
return;
}
}
/**
* Process an LCD 'P' command, related to homing and printing.
* Cancel:
* {P:X}
*
* Home all axes:
* {P:H}
*
* Print a file:
* {P:000}
* The File number is specified as a three digit value.
* Printer responds with:
* {PRINTFILE:Mini_SNES_Bottom.gcode}
* {SYS:BUILD}echo:Now fresh file: Mini_SNES_Bottom.gcode
* File opened: Mini_SNES_Bottom.gcode Size: 5805813
* File selected
* {SYS:BUILD}
* T:-2526.8 E:0
* T:-2533.0 E:0
* T:-2537.4 E:0
* Note only the curly brace stuff matters.
*/
void process_lcd_p_command(const char* command) {
switch (command[0]) {
case 'X':
// cancel print
write_to_lcd_P(PSTR("{SYS:CANCELING}"));
clear_command_queue();
quickstop_stepper();
print_job_timer.stop();
thermalManager.disable_all_heaters();
#if FAN_COUNT > 0
for (uint8_t i = 0; i < FAN_COUNT; i++) fanSpeeds[i] = 0;
#endif
wait_for_heatup = false;
write_to_lcd_P(PSTR("{SYS:STARTED}"));
break;
case 'H':
// Home all axis
enqueue_and_echo_command_now("G28");
break;
default: {
// Print file 000 - a three digit number indicating which
// file to print in the SD card. If it's a directory,
// then switch to the directory.
// Find the name of the file to print.
// It's needed to echo the PRINTFILE option.
// The {S:L} command should've ensured the SD card was mounted.
card.getfilename(atoi(command));
// There may be a difference in how V1 and V2 LCDs handle subdirectory
// prints. Investigate more. This matches the V1 motion controller actions
// but the V2 LCD switches to "print" mode on {SYS:DIR} response.
if (card.filenameIsDir) {
card.chdir(card.filename);
write_to_lcd_P(PSTR("{SYS:DIR}"));
}
else {
char message_buffer[MAX_CURLY_COMMAND];
sprintf_P(message_buffer, PSTR("{PRINTFILE:%s}"), card.filename);
write_to_lcd(message_buffer);
write_to_lcd_P(PSTR("{SYS:BUILD}"));
card.openAndPrintFile(card.filename);
}
} break; // default
} // switch
}
/**
* Handle an lcd 'S' command
* {S:I} - Temperature request
* {T0:999/000}{T1:000/000}{TP:004/000}
*
* {S:L} - File Listing request
* Printer Response:
* {FILE:buttons.gcode}
* {FILE:update.bin}
* {FILE:nupdate.bin}
* {FILE:fcupdate.flg}
* {SYS:OK}
*/
void process_lcd_s_command(const char* command) {
switch (command[0]) {
case 'I': {
// temperature information
char message_buffer[MAX_CURLY_COMMAND];
sprintf_P(message_buffer, PSTR("{T0:%03.0f/%03i}{T1:000/000}{TP:%03.0f/%03i}"),
thermalManager.degHotend(0), thermalManager.degTargetHotend(0),
thermalManager.degBed(), thermalManager.degTargetBed()
);
write_to_lcd(message_buffer);
} break;
case 'H':
// Home all axis
enqueue_and_echo_command("G28", false);
break;
case 'L': {
if (!card.cardOK) card.initsd();
// A more efficient way to do this would be to
// implement a callback in the ls_SerialPrint code, but
// that requires changes to the core cardreader class that
// would not benefit the majority of users. Since one can't
// select a file for printing during a print, there's
// little reason not to do it this way.
char message_buffer[MAX_CURLY_COMMAND];
uint16_t file_count = card.get_num_Files();
for (uint16_t i = 0; i < file_count; i++) {
card.getfilename(i);
sprintf_P(message_buffer, card.filenameIsDir ? PSTR("{DIR:%s}") : PSTR("{FILE:%s}"), card.filename);
write_to_lcd(message_buffer);
}
write_to_lcd_P(PSTR("{SYS:OK}"));
} break;
default:
SERIAL_ECHOLNPAIR("UNKNOWN S COMMAND", command);
return;
}
}
/**
* Receive a curly brace command and translate to G-code.
* Currently {E:0} is not handled. Its function is unknown,
* but it occurs during the temp window after a sys build.
*/
void process_lcd_command(const char* command) {
const char *current = command;
current++; // skip the leading {. The trailing one is already gone.
byte command_code = *current++;
if (*current != ':') {
SERIAL_ECHOLNPAIR("UNKNOWN COMMAND FORMAT", command);
return;
}
current++; // skip the :
switch (command_code) {
case 'S':
process_lcd_s_command(current);
break;
case 'J':
process_lcd_j_command(current);
break;
case 'P':
process_lcd_p_command(current);
break;
case 'C':
process_lcd_c_command(current);
break;
case 'B':
case 'E':
process_lcd_eb_command(current);
break;
default:
SERIAL_ECHOLNPAIR("UNKNOWN COMMAND", command);
return;
}
}
/**
* UC means connected.
* UD means disconnected
* The stock firmware considers USB initialied as "connected."
*/
void update_usb_status(const bool forceUpdate) {
static bool last_usb_connected_status = false;
// This is mildly different than stock, which
// appears to use the usb discovery status.
// This is more logical.
if (last_usb_connected_status != Serial || forceUpdate) {
last_usb_connected_status = Serial;
write_to_lcd_P(last_usb_connected_status ? PSTR("{R:UC}\r\n") : PSTR("{R:UD}\r\n"));
}
}
/**
* - from printer on startup:
* {SYS:STARTED}{VER:29}{SYS:STARTED}{R:UD}
* The optimize attribute fixes a register Compile
* error for amtel.
*/
void lcd_update() _O2 {
static char inbound_buffer[MAX_CURLY_COMMAND];
// First report USB status.
update_usb_status(false);
// now drain commands...
while (LCD_SERIAL.available()) {
const byte b = (byte)LCD_SERIAL.read() & 0x7F;
inbound_buffer[inbound_count++] = b;
if (b == '}' || inbound_count == sizeof(inbound_buffer) - 1) {
inbound_buffer[inbound_count - 1] = '\0';
process_lcd_command(inbound_buffer);
inbound_count = 0;
inbound_buffer[0] = 0;
}
}
// If there's a print in progress, we need to emit the status as
// {TQ:<PERCENT>}
if (card.sdprinting) {
// We also need to send: T:-2538.0 E:0
// I have no idea what this means.
char message_buffer[10];
sprintf_P(message_buffer, PSTR("{TQ:%03i}"), card.percentDone());
write_to_lcd(message_buffer);
}
}
/**
* The Malyan LCD actually runs as a separate MCU on Serial 1.
* This code's job is to siphon the weird curly-brace commands from
* it and translate into gcode, which then gets injected into
* the command queue where possible.
*/
void lcd_init() {
inbound_count = 0;
LCD_SERIAL.begin(500000);
// Signal init
write_to_lcd_P(PSTR("{SYS:STARTED}\r\n"));
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// send a version that says "unsupported"
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write_to_lcd_P(PSTR("{VER:66}\r\n"));
// No idea why it does this twice.
write_to_lcd_P(PSTR("{SYS:STARTED}\r\n"));
update_usb_status(true);
}
/**
* Set an alert.
*/
void lcd_setalertstatusPGM(const char* message) {
char message_buffer[MAX_CURLY_COMMAND];
sprintf_P(message_buffer, PSTR("{E:%s}"), message);
write_to_lcd(message_buffer);
}
#endif // MALYAN_LCD