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198 lines
6.3 KiB
198 lines
6.3 KiB
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Based on u8g_com_arduino_ssd_i2c.c
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*
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* COM interface for Arduino (AND ATmega) and the SSDxxxx chip (SOLOMON) variant
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* I2C protocol
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*
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* Universal 8bit Graphics Library
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*
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* Copyright (c) 2011, olikraus@gmail.com
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* Special pin usage:
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* U8G_PI_I2C_OPTION additional options
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* U8G_PI_A0_STATE used to store the last value of the command/data register selection
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* U8G_PI_SET_A0 1: Signal request to update I2C device with new A0_STATE, 0: Do nothing, A0_STATE matches I2C device
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* U8G_PI_SCL clock line (NOT USED)
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* U8G_PI_SDA data line (NOT USED)
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*
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* U8G_PI_RESET reset line (currently disabled, see below)
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*
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* Protocol:
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* SLA, Cmd/Data Selection, Arguments
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* The command/data register is selected by a special instruction byte, which is sent after SLA
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*
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* The continue bit is always 0 so that a (re)start is equired for the change from cmd to/data mode
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*/
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#ifdef TARGET_LPC1768
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#include "../../../inc/MarlinConfigPre.h"
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#if HAS_MARLINUI_U8GLIB
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#include <U8glib.h>
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#define I2C_SLA (0x3C*2)
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//#define I2C_CMD_MODE 0x080
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#define I2C_CMD_MODE 0x000
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#define I2C_DATA_MODE 0x040
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uint8_t u8g_com_ssd_I2C_start_sequence(u8g_t *u8g) {
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/* are we requested to set the a0 state? */
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if (u8g->pin_list[U8G_PI_SET_A0] == 0) return 1;
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/* setup bus, might be a repeated start */
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if (u8g_i2c_start(I2C_SLA) == 0) return 0;
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if (u8g->pin_list[U8G_PI_A0_STATE] == 0) {
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if (u8g_i2c_send_byte(I2C_CMD_MODE) == 0) return 0;
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}
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else if (u8g_i2c_send_byte(I2C_DATA_MODE) == 0)
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return 0;
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u8g->pin_list[U8G_PI_SET_A0] = 0;
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return 1;
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}
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uint8_t u8g_com_HAL_LPC1768_ssd_hw_i2c_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
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switch (msg) {
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case U8G_COM_MSG_INIT:
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//u8g_com_arduino_digital_write(u8g, U8G_PI_SCL, HIGH);
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//u8g_com_arduino_digital_write(u8g, U8G_PI_SDA, HIGH);
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//u8g->pin_list[U8G_PI_A0_STATE] = 0; /* initial RS state: unknown mode */
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u8g_i2c_init(u8g->pin_list[U8G_PI_I2C_OPTION]);
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u8g_com_ssd_I2C_start_sequence(u8g);
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break;
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case U8G_COM_MSG_STOP:
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break;
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case U8G_COM_MSG_RESET:
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/* Currently disabled, but it could be enable. Previous restrictions have been removed */
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/* u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val); */
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break;
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case U8G_COM_MSG_CHIP_SELECT:
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u8g->pin_list[U8G_PI_A0_STATE] = 0;
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u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again, also forces start condition */
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if (arg_val == 0 ) {
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/* disable chip, send stop condition */
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u8g_i2c_stop();
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}
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else {
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/* enable, do nothing: any byte writing will trigger the i2c start */
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}
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break;
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case U8G_COM_MSG_WRITE_BYTE:
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//u8g->pin_list[U8G_PI_SET_A0] = 1;
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if (u8g_com_ssd_I2C_start_sequence(u8g) == 0) {
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u8g_i2c_stop();
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return 0;
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}
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if (u8g_i2c_send_byte(arg_val) == 0) {
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u8g_i2c_stop();
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return 0;
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}
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// u8g_i2c_stop();
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break;
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case U8G_COM_MSG_WRITE_SEQ: {
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//u8g->pin_list[U8G_PI_SET_A0] = 1;
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if (u8g_com_ssd_I2C_start_sequence(u8g) == 0) {
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u8g_i2c_stop();
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return 0;
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}
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uint8_t *ptr = (uint8_t *)arg_ptr;
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while (arg_val > 0) {
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if (u8g_i2c_send_byte(*ptr++) == 0) {
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u8g_i2c_stop();
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return 0;
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}
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arg_val--;
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}
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}
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// u8g_i2c_stop();
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break;
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case U8G_COM_MSG_WRITE_SEQ_P: {
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//u8g->pin_list[U8G_PI_SET_A0] = 1;
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if (u8g_com_ssd_I2C_start_sequence(u8g) == 0) {
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u8g_i2c_stop();
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return 0;
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}
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uint8_t *ptr = (uint8_t *)arg_ptr;
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while (arg_val > 0) {
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if (u8g_i2c_send_byte(u8g_pgm_read(ptr)) == 0)
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return 0;
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ptr++;
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arg_val--;
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}
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}
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// u8g_i2c_stop();
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break;
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case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
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u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
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u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again */
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break;
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} // switch
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return 1;
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}
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#endif // HAS_MARLINUI_U8GLIB
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#endif // TARGET_LPC1768
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