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u8g_com_sw_spi.cpp
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u8g_com_sw_spi.cpp
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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2021 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_std_sw_spi.c
*
* Universal 8bit Graphics Library
*
* Copyright (c) 2015, 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.
*/
#ifdef __PLAT_NATIVE_SIM__
#include "../../../inc/MarlinConfig.h"
#if HAS_MARLINUI_U8GLIB && !IS_U8GLIB_ST7920
#undef SPI_SPEED
#define SPI_SPEED 2 // About 2 MHz
#include <Arduino.h>
#include <U8glib-HAL.h>
#ifdef __cplusplus
extern "C" {
#endif
uint8_t swSpiTransfer_mode_0(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin ) {
for (uint8_t i = 0; i < 8; ++i) {
if (spi_speed == 0) {
WRITE_PIN(mosi_pin, !!(b & 0x80));
WRITE_PIN(sck_pin, HIGH);
b <<= 1;
if (miso_pin >= 0 && READ_PIN(miso_pin)) b |= 1;
WRITE_PIN(sck_pin, LOW);
}
else {
const uint8_t state = (b & 0x80) ? HIGH : LOW;
for (uint8_t j = 0; j < spi_speed; ++j)
WRITE_PIN(mosi_pin, state);
for (uint8_t j = 0; j < spi_speed + (miso_pin >= 0 ? 0 : 1); ++j)
WRITE_PIN(sck_pin, HIGH);
b <<= 1;
if (miso_pin >= 0 && READ_PIN(miso_pin)) b |= 1;
for (uint8_t j = 0; j < spi_speed; ++j)
WRITE_PIN(sck_pin, LOW);
}
}
return b;
}
uint8_t swSpiTransfer_mode_3(uint8_t b, const uint8_t spi_speed, const pin_t sck_pin, const pin_t miso_pin, const pin_t mosi_pin ) {
for (uint8_t i = 0; i < 8; ++i) {
const uint8_t state = (b & 0x80) ? HIGH : LOW;
if (spi_speed == 0) {
WRITE_PIN(sck_pin, LOW);
WRITE_PIN(mosi_pin, state);
WRITE_PIN(mosi_pin, state); // need some setup time
WRITE_PIN(sck_pin, HIGH);
}
else {
for (uint8_t j = 0; j < spi_speed + (miso_pin >= 0 ? 0 : 1); ++j)
WRITE_PIN(sck_pin, LOW);
for (uint8_t j = 0; j < spi_speed; ++j)
WRITE_PIN(mosi_pin, state);
for (uint8_t j = 0; j < spi_speed; ++j)
WRITE_PIN(sck_pin, HIGH);
}
b <<= 1;
if (miso_pin >= 0 && READ_PIN(miso_pin)) b |= 1;
}
return b;
}
static uint8_t SPI_speed = 0;
static uint8_t swSpiInit(const uint8_t spi_speed, const uint8_t clk_pin, const uint8_t mosi_pin) {
return spi_speed;
}
static void u8g_sw_spi_shift_out(uint8_t dataPin, uint8_t clockPin, uint8_t val) {
#if ANY(FYSETC_MINI_12864, MKS_MINI_12864)
swSpiTransfer_mode_3(val, SPI_speed, clockPin, -1, dataPin);
#else
swSpiTransfer_mode_0(val, SPI_speed, clockPin, -1, dataPin);
#endif
}
uint8_t u8g_com_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
switch (msg) {
case U8G_COM_MSG_INIT:
u8g_SetPIOutput(u8g, U8G_PI_SCK);
u8g_SetPIOutput(u8g, U8G_PI_MOSI);
u8g_SetPIOutput(u8g, U8G_PI_CS);
u8g_SetPIOutput(u8g, U8G_PI_A0);
if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPIOutput(u8g, U8G_PI_RESET);
SPI_speed = swSpiInit(SPI_SPEED, u8g->pin_list[U8G_PI_SCK], u8g->pin_list[U8G_PI_MOSI]);
u8g_SetPILevel(u8g, U8G_PI_SCK, 0);
u8g_SetPILevel(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_SetPILevel(u8g, U8G_PI_RESET, arg_val);
break;
case U8G_COM_MSG_CHIP_SELECT:
#if ANY(FYSETC_MINI_12864, MKS_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_SetPILevel(u8g, U8G_PI_SCK, 1); // Set SCK to mode 3 idle state before CS goes active
u8g_SetPILevel(u8g, U8G_PI_CS, LOW);
}
else {
u8g_SetPILevel(u8g, U8G_PI_CS, HIGH);
u8g_SetPILevel(u8g, U8G_PI_SCK, 0); // Set SCK to mode 0 idle state after CS goes inactive
}
#else
u8g_SetPILevel(u8g, U8G_PI_CS, !arg_val);
#endif
break;
case U8G_COM_MSG_WRITE_BYTE:
u8g_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], arg_val);
break;
case U8G_COM_MSG_WRITE_SEQ: {
uint8_t *ptr = (uint8_t *)arg_ptr;
while (arg_val > 0) {
u8g_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], *ptr++);
arg_val--;
}
}
break;
case U8G_COM_MSG_WRITE_SEQ_P: {
uint8_t *ptr = (uint8_t *)arg_ptr;
while (arg_val > 0) {
u8g_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], 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_SetPILevel(u8g, U8G_PI_A0, arg_val);
break;
}
return 1;
}
#ifdef __cplusplus
}
#endif
#elif NONE(TFT_COLOR_UI, TFT_CLASSIC_UI, TFT_LVGL_UI, HAS_MARLINUI_HD44780) && HAS_MARLINUI_U8GLIB
#include <U8glib-HAL.h>
uint8_t u8g_com_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {return 0;}
#endif // HAS_MARLINUI_U8GLIB && !IS_U8GLIB_ST7920
#endif // __PLAT_NATIVE_SIM__