From e8701195e66f2d27ffe17fb514eae8173795aaf7 Mon Sep 17 00:00:00 2001
From: Georgiy Bondarenko <69736697+nehilo@users.noreply.github.com>
Date: Thu, 4 Mar 2021 22:54:23 +0500
Subject: Initial commit
---
.../HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp | 166 +++++++++++++++++++++
1 file changed, 166 insertions(+)
create mode 100644 Marlin/src/HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp
(limited to 'Marlin/src/HAL/STM32F1/dogm')
diff --git a/Marlin/src/HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp b/Marlin/src/HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp
new file mode 100644
index 0000000..784a80c
--- /dev/null
+++ b/Marlin/src/HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp
@@ -0,0 +1,166 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * 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 .
+ *
+ */
+#ifdef __STM32F1__
+
+#include "../../../inc/MarlinConfig.h"
+
+#if BOTH(HAS_MARLINUI_U8GLIB, FORCE_SOFT_SPI)
+
+#include
+#include "../../shared/HAL_SPI.h"
+
+#ifndef LCD_SPI_SPEED
+ #define LCD_SPI_SPEED SPI_FULL_SPEED // Fastest
+ //#define LCD_SPI_SPEED SPI_QUARTER_SPEED // Slower
+#endif
+
+static uint8_t SPI_speed = LCD_SPI_SPEED;
+
+static inline uint8_t swSpiTransfer_mode_0(uint8_t b, const uint8_t spi_speed, const pin_t miso_pin=-1) {
+ LOOP_L_N(i, 8) {
+ if (spi_speed == 0) {
+ WRITE(DOGLCD_MOSI, !!(b & 0x80));
+ WRITE(DOGLCD_SCK, HIGH);
+ b <<= 1;
+ if (miso_pin >= 0 && READ(miso_pin)) b |= 1;
+ WRITE(DOGLCD_SCK, LOW);
+ }
+ else {
+ const uint8_t state = (b & 0x80) ? HIGH : LOW;
+ LOOP_L_N(j, spi_speed)
+ WRITE(DOGLCD_MOSI, state);
+
+ LOOP_L_N(j, spi_speed + (miso_pin >= 0 ? 0 : 1))
+ WRITE(DOGLCD_SCK, HIGH);
+
+ b <<= 1;
+ if (miso_pin >= 0 && READ(miso_pin)) b |= 1;
+
+ LOOP_L_N(j, spi_speed)
+ WRITE(DOGLCD_SCK, LOW);
+ }
+ }
+ return b;
+}
+
+static inline uint8_t swSpiTransfer_mode_3(uint8_t b, const uint8_t spi_speed, const pin_t miso_pin=-1) {
+ LOOP_L_N(i, 8) {
+ const uint8_t state = (b & 0x80) ? HIGH : LOW;
+ if (spi_speed == 0) {
+ WRITE(DOGLCD_SCK, LOW);
+ WRITE(DOGLCD_MOSI, state);
+ WRITE(DOGLCD_MOSI, state); // need some setup time
+ WRITE(DOGLCD_SCK, HIGH);
+ }
+ else {
+ LOOP_L_N(j, spi_speed + (miso_pin >= 0 ? 0 : 1))
+ WRITE(DOGLCD_SCK, LOW);
+
+ LOOP_L_N(j, spi_speed)
+ WRITE(DOGLCD_MOSI, state);
+
+ LOOP_L_N(j, spi_speed)
+ WRITE(DOGLCD_SCK, HIGH);
+ }
+ b <<= 1;
+ if (miso_pin >= 0 && READ(miso_pin)) b |= 1;
+ }
+ return b;
+}
+
+static void u8g_sw_spi_HAL_STM32F1_shift_out(uint8_t val) {
+ #if ENABLED(FYSETC_MINI_12864)
+ swSpiTransfer_mode_3(val, SPI_speed);
+ #else
+ swSpiTransfer_mode_0(val, SPI_speed);
+ #endif
+}
+
+static uint8_t swSpiInit(const uint8_t spi_speed) {
+ #if PIN_EXISTS(LCD_RESET)
+ SET_OUTPUT(LCD_RESET_PIN);
+ #endif
+ SET_OUTPUT(DOGLCD_A0);
+ OUT_WRITE(DOGLCD_SCK, LOW);
+ OUT_WRITE(DOGLCD_MOSI, LOW);
+ OUT_WRITE(DOGLCD_CS, HIGH);
+ return spi_speed;
+}
+
+uint8_t u8g_com_HAL_STM32F1_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
+ switch (msg) {
+ case U8G_COM_MSG_INIT:
+ SPI_speed = swSpiInit(LCD_SPI_SPEED);
+ break;
+
+ case U8G_COM_MSG_STOP:
+ break;
+
+ case U8G_COM_MSG_RESET:
+ #if PIN_EXISTS(LCD_RESET)
+ WRITE(LCD_RESET_PIN, arg_val);
+ #endif
+ break;
+
+ case U8G_COM_MSG_CHIP_SELECT:
+ #if ENABLED(FYSETC_MINI_12864) // This 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
+ WRITE(DOGLCD_SCK, HIGH); // Set SCK to mode 3 idle state before CS goes active
+ WRITE(DOGLCD_CS, LOW);
+ }
+ else {
+ WRITE(DOGLCD_CS, HIGH);
+ WRITE(DOGLCD_SCK, LOW); // Set SCK to mode 0 idle state after CS goes inactive
+ }
+ #else
+ WRITE(DOGLCD_CS, !arg_val);
+ #endif
+ break;
+
+ case U8G_COM_MSG_WRITE_BYTE:
+ u8g_sw_spi_HAL_STM32F1_shift_out(arg_val);
+ break;
+
+ case U8G_COM_MSG_WRITE_SEQ: {
+ uint8_t *ptr = (uint8_t *)arg_ptr;
+ while (arg_val > 0) {
+ u8g_sw_spi_HAL_STM32F1_shift_out(*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_HAL_STM32F1_shift_out(u8g_pgm_read(ptr));
+ ptr++;
+ arg_val--;
+ }
+ } break;
+
+ case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
+ WRITE(DOGLCD_A0, arg_val);
+ break;
+ }
+ return 1;
+}
+
+#endif // HAS_MARLINUI_U8GLIB && FORCE_SOFT_SPI
+#endif // STM32F1
--
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