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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2019 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/>.
- *
- */
-
- /**
- * Based on u8g_com_arduino_ssd_i2c.c
- *
- * COM interface for Arduino (AND ATmega) and the SSDxxxx chip (SOLOMON) variant
- * I2C protocol
- *
- * Universal 8bit Graphics Library
- *
- * Copyright (c) 2011, olikraus@gmail.com
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright notice, this list
- * of conditions and the following disclaimer.
- *
- * * Redistributions in binary form must reproduce the above copyright notice, this
- * list of conditions and the following disclaimer in the documentation and/or other
- * materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- /**
- * Special pin usage:
- * U8G_PI_I2C_OPTION additional options
- * U8G_PI_A0_STATE used to store the last value of the command/data register selection
- * U8G_PI_SET_A0 1: Signal request to update I2C device with new A0_STATE, 0: Do nothing, A0_STATE matches I2C device
- * U8G_PI_SCL clock line (NOT USED)
- * U8G_PI_SDA data line (NOT USED)
- *
- * U8G_PI_RESET reset line (currently disabled, see below)
- *
- * Protocol:
- * SLA, Cmd/Data Selection, Arguments
- * The command/data register is selected by a special instruction byte, which is sent after SLA
- *
- * The continue bit is always 0 so that a (re)start is equired for the change from cmd to/data mode
- */
-
- #ifdef TARGET_LPC1768
-
- #include "../../../inc/MarlinConfigPre.h"
-
- #if HAS_GRAPHICAL_LCD
-
- #include <U8glib.h>
-
- #define I2C_SLA (0x3C*2)
- //#define I2C_CMD_MODE 0x080
- #define I2C_CMD_MODE 0x000
- #define I2C_DATA_MODE 0x040
-
- uint8_t u8g_com_ssd_I2C_start_sequence(u8g_t *u8g) {
- /* are we requested to set the a0 state? */
- if (u8g->pin_list[U8G_PI_SET_A0] == 0) return 1;
-
- /* setup bus, might be a repeated start */
- if (u8g_i2c_start(I2C_SLA) == 0) return 0;
- if (u8g->pin_list[U8G_PI_A0_STATE] == 0) {
- if (u8g_i2c_send_byte(I2C_CMD_MODE) == 0) return 0;
- }
- else if (u8g_i2c_send_byte(I2C_DATA_MODE) == 0)
- return 0;
-
- u8g->pin_list[U8G_PI_SET_A0] = 0;
- return 1;
- }
-
- uint8_t u8g_com_HAL_LPC1768_ssd_hw_i2c_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
- switch (msg) {
- case U8G_COM_MSG_INIT:
- //u8g_com_arduino_digital_write(u8g, U8G_PI_SCL, HIGH);
- //u8g_com_arduino_digital_write(u8g, U8G_PI_SDA, HIGH);
- //u8g->pin_list[U8G_PI_A0_STATE] = 0; /* initial RS state: unknown mode */
-
- u8g_i2c_init(u8g->pin_list[U8G_PI_I2C_OPTION]);
- u8g_com_ssd_I2C_start_sequence(u8g);
- break;
-
- case U8G_COM_MSG_STOP:
- break;
-
- case U8G_COM_MSG_RESET:
- /* Currently disabled, but it could be enable. Previous restrictions have been removed */
- /* u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val); */
- break;
-
- case U8G_COM_MSG_CHIP_SELECT:
- u8g->pin_list[U8G_PI_A0_STATE] = 0;
- u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again, also forces start condition */
- if (arg_val == 0 ) {
- /* disable chip, send stop condition */
- u8g_i2c_stop();
- }
- else {
- /* enable, do nothing: any byte writing will trigger the i2c start */
- }
- break;
-
- case U8G_COM_MSG_WRITE_BYTE:
- //u8g->pin_list[U8G_PI_SET_A0] = 1;
- if (u8g_com_ssd_I2C_start_sequence(u8g) == 0) {
- u8g_i2c_stop();
- return 0;
- }
-
- if (u8g_i2c_send_byte(arg_val) == 0) {
- u8g_i2c_stop();
- return 0;
- }
- // u8g_i2c_stop();
- break;
-
- case U8G_COM_MSG_WRITE_SEQ: {
- //u8g->pin_list[U8G_PI_SET_A0] = 1;
- if (u8g_com_ssd_I2C_start_sequence(u8g) == 0) {
- u8g_i2c_stop();
- return 0;
- }
-
- uint8_t *ptr = (uint8_t *)arg_ptr;
- while (arg_val > 0) {
- if (u8g_i2c_send_byte(*ptr++) == 0) {
- u8g_i2c_stop();
- return 0;
- }
- arg_val--;
- }
- }
- // u8g_i2c_stop();
- break;
-
- case U8G_COM_MSG_WRITE_SEQ_P: {
- //u8g->pin_list[U8G_PI_SET_A0] = 1;
- if (u8g_com_ssd_I2C_start_sequence(u8g) == 0) {
- u8g_i2c_stop();
- return 0;
- }
-
- uint8_t *ptr = (uint8_t *)arg_ptr;
- while (arg_val > 0) {
- if (u8g_i2c_send_byte(u8g_pgm_read(ptr)) == 0)
- return 0;
- ptr++;
- arg_val--;
- }
- }
- // u8g_i2c_stop();
- break;
-
- case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
- u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
- u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again */
- break;
-
- } // switch
- return 1;
- }
-
- #endif // HAS_GRAPHICAL_LCD
-
- #endif // TARGET_LPC1768
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