/** * Marlin 3D Printer Firmware * Copyright (c) 2020 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 . * */ #include "../../../inc/MarlinConfig.h" #if ENABLED(EXPERIMENTAL_I2CBUS) #include "../../gcode.h" #include "../../../MarlinCore.h" // for i2c /** * M260: Send data to a I2C slave device * * This is a PoC, the formatting and arguments for the GCODE will * change to be more compatible, the current proposal is: * * M260 A ; Sets the I2C slave address the data will be sent to * * M260 B * M260 B * M260 B * * M260 S1 ; Send the buffered data and reset the buffer * M260 R1 ; Reset the buffer without sending data * */ void GcodeSuite::M260() { // Set the target address if (parser.seen('A')) i2c.address(parser.value_byte()); // Add a new byte to the buffer if (parser.seen('B')) i2c.addbyte(parser.value_byte()); // Flush the buffer to the bus if (parser.seen('S')) i2c.send(); // Reset and rewind the buffer else if (parser.seen('R')) i2c.reset(); } /** * M261: Request X bytes from I2C slave device * * Usage: M261 A B */ void GcodeSuite::M261() { if (parser.seen('A')) i2c.address(parser.value_byte()); uint8_t bytes = parser.byteval('B', 1); if (i2c.addr && bytes && bytes <= TWIBUS_BUFFER_SIZE) i2c.relay(bytes); else SERIAL_ERROR_MSG("Bad i2c request"); } #endif