1 files changed, 74 insertions, 0 deletions
diff --git a/Marlin/src/HAL/STM32/tft/tft_spi.h b/Marlin/src/HAL/STM32/tft/tft_spi.h
new file mode 100644
index 0000000..667b5f3
--- /dev/null
+++ b/Marlin/src/HAL/STM32/tft/tft_spi.h
@@ -0,0 +1,74 @@
+/**
+ * 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/>.
+ *
+ */
+#pragma once
+
+#ifdef STM32F1xx
+  #include "stm32f1xx_hal.h"
+#elif defined(STM32F4xx)
+  #include "stm32f4xx_hal.h"
+#else
+  #error SPI TFT is currently only supported on STM32F1 and STM32F4 hardware.
+#endif
+
+#ifndef LCD_READ_ID
+  #define LCD_READ_ID 0x04   // Read display identification information (0xD3 on ILI9341)
+#endif
+#ifndef LCD_READ_ID4
+  #define LCD_READ_ID4 0xD3   // Read display identification information (0xD3 on ILI9341)
+#endif
+
+#define DATASIZE_8BIT    SPI_DATASIZE_8BIT
+#define DATASIZE_16BIT   SPI_DATASIZE_16BIT
+#define TFT_IO_DRIVER TFT_SPI
+
+class TFT_SPI {
+private:
+  static SPI_HandleTypeDef SPIx;
+  static DMA_HandleTypeDef DMAtx;
+
+  static uint32_t ReadID(uint16_t Reg);
+  static void Transmit(uint16_t Data);
+  static void TransmitDMA(uint32_t MemoryIncrease, uint16_t *Data, uint16_t Count);
+
+public:
+  static void Init();
+  static uint32_t GetID();
+  static bool isBusy();
+  static void Abort();
+
+  static void DataTransferBegin(uint16_t DataWidth = DATASIZE_16BIT);
+  static void DataTransferEnd() { WRITE(TFT_CS_PIN, HIGH); };
+  static void DataTransferAbort();
+
+  static void WriteData(uint16_t Data) { Transmit(Data); }
+  static void WriteReg(uint16_t Reg) { WRITE(TFT_A0_PIN, LOW); Transmit(Reg); WRITE(TFT_A0_PIN, HIGH); }
+
+  static void WriteSequence(uint16_t *Data, uint16_t Count) { TransmitDMA(DMA_MINC_ENABLE, Data, Count); }
+  static void WriteMultiple(uint16_t Color, uint16_t Count) { static uint16_t Data; Data = Color; TransmitDMA(DMA_MINC_DISABLE, &Data, Count); }
+  static void WriteMultiple(uint16_t Color, uint32_t Count) {
+    static uint16_t Data; Data = Color;
+    while (Count > 0) {
+      TransmitDMA(DMA_MINC_DISABLE, &Data, Count > 0xFFFF ? 0xFFFF : Count);
+      Count = Count > 0xFFFF ? Count - 0xFFFF : 0;
+    }
+  }
+};