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- /**
- * 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 <https://www.gnu.org/licenses/>.
- *
- */
-
- /**
- * Based on u8g_com_st7920_hw_spi.c
- *
- * 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.
- */
-
- #if defined(ARDUINO) && !defined(ARDUINO_ARCH_STM32) && !defined(ARDUINO_ARCH_SAM)
-
- #include "../../inc/MarlinConfigPre.h"
-
- #if HAS_MARLINUI_U8GLIB
-
- #include "../shared/Marduino.h"
- #include "../shared/Delay.h"
-
- #include <U8glib-HAL.h>
-
- static uint8_t u8g_bitData, u8g_bitNotData, u8g_bitClock, u8g_bitNotClock;
- static volatile uint8_t *u8g_outData, *u8g_outClock;
-
- static void u8g_com_arduino_init_shift_out(uint8_t dataPin, uint8_t clockPin) {
- u8g_outData = portOutputRegister(digitalPinToPort(dataPin));
- u8g_outClock = portOutputRegister(digitalPinToPort(clockPin));
- u8g_bitData = digitalPinToBitMask(dataPin);
- u8g_bitClock = digitalPinToBitMask(clockPin);
-
- u8g_bitNotClock = u8g_bitClock;
- u8g_bitNotClock ^= 0xFF;
-
- u8g_bitNotData = u8g_bitData;
- u8g_bitNotData ^= 0xFF;
- }
-
- void u8g_spiSend_sw_AVR_mode_0(uint8_t val) {
- uint8_t bitData = u8g_bitData,
- bitNotData = u8g_bitNotData,
- bitClock = u8g_bitClock,
- bitNotClock = u8g_bitNotClock;
- volatile uint8_t *outData = u8g_outData,
- *outClock = u8g_outClock;
- U8G_ATOMIC_START();
- LOOP_L_N(i, 8) {
- if (val & 0x80)
- *outData |= bitData;
- else
- *outData &= bitNotData;
- *outClock |= bitClock;
- val <<= 1;
- *outClock &= bitNotClock;
- }
- U8G_ATOMIC_END();
- }
-
- void u8g_spiSend_sw_AVR_mode_3(uint8_t val) {
- uint8_t bitData = u8g_bitData,
- bitNotData = u8g_bitNotData,
- bitClock = u8g_bitClock,
- bitNotClock = u8g_bitNotClock;
- volatile uint8_t *outData = u8g_outData,
- *outClock = u8g_outClock;
- U8G_ATOMIC_START();
- LOOP_L_N(i, 8) {
- *outClock &= bitNotClock;
- if (val & 0x80)
- *outData |= bitData;
- else
- *outData &= bitNotData;
- *outClock |= bitClock;
- val <<= 1;
- }
- U8G_ATOMIC_END();
- }
-
-
- #if ENABLED(FYSETC_MINI_12864)
- #define SPISEND_SW_AVR u8g_spiSend_sw_AVR_mode_3
- #else
- #define SPISEND_SW_AVR u8g_spiSend_sw_AVR_mode_0
- #endif
-
- uint8_t u8g_com_HAL_AVR_sw_sp_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
- switch (msg) {
- case U8G_COM_MSG_INIT:
- u8g_com_arduino_init_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK]);
- u8g_com_arduino_assign_pin_output_high(u8g);
- u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, 0);
- u8g_com_arduino_digital_write(u8g, U8G_PI_MOSI, 0);
- break;
-
- case U8G_COM_MSG_STOP:
- break;
-
- case U8G_COM_MSG_RESET:
- if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val);
- break;
-
- case U8G_COM_MSG_CHIP_SELECT:
- #if ENABLED(FYSETC_MINI_12864) // LCD SPI is running mode 3 while SD card is running mode 0
- if (arg_val) { // SCK idle state needs to be set to the proper idle state before
- // the next chip select goes active
- u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, 1); // Set SCK to mode 3 idle state before CS goes active
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
- }
- else {
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
- u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, 0); // Set SCK to mode 0 idle state after CS goes inactive
- }
- #else
- u8g_com_arduino_digital_write(u8g, U8G_PI_CS, !arg_val);
- #endif
- break;
-
- case U8G_COM_MSG_WRITE_BYTE:
- SPISEND_SW_AVR(arg_val);
- break;
-
- case U8G_COM_MSG_WRITE_SEQ: {
- uint8_t *ptr = (uint8_t *)arg_ptr;
- while (arg_val > 0) {
- SPISEND_SW_AVR(*ptr++);
- arg_val--;
- }
- }
- break;
-
- case U8G_COM_MSG_WRITE_SEQ_P: {
- uint8_t *ptr = (uint8_t *)arg_ptr;
- while (arg_val > 0) {
- SPISEND_SW_AVR(u8g_pgm_read(ptr));
- ptr++;
- arg_val--;
- }
- }
- break;
-
- case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
- u8g_com_arduino_digital_write(u8g, U8G_PI_A0, arg_val);
- break;
- }
- return 1;
- }
-
- #endif // HAS_MARLINUI_U8GLIB
- #endif // ARDUINO_ARCH_SAM
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