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printerfw/Marlin/src/HAL/HAL_AVR/u8g_com_HAL_AVR_sw_spi.cpp

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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_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_GRAPHICAL_LCD
#include "../shared/Marduino.h"
#include "../shared/Delay.h"
#include <U8glib.h>
uint8_t u8g_bitData, u8g_bitNotData, u8g_bitClock, u8g_bitNotClock;
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();
for (uint8_t i = 0; i < 8; i++) {
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();
for (uint8_t i = 0; i < 8; i++) {
*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_GRAPHICAL_LCD
#endif // ARDUINO_ARCH_SAM
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