Initial commit

1 files changed, 166 insertions, 0 deletions

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 <https://www.gnu.org/licenses/>.
+ *
+ */
+#ifdef __STM32F1__
+
+#include "../../../inc/MarlinConfig.h"
+
+#if BOTH(HAS_MARLINUI_U8GLIB, FORCE_SOFT_SPI)
+
+#include <U8glib.h>
+#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