1 files changed, 149 insertions, 0 deletions
diff --git a/Marlin/src/HAL/STM32F1/tft/tft_spi.cpp b/Marlin/src/HAL/STM32F1/tft/tft_spi.cpp
new file mode 100644
index 0000000..1095389
--- /dev/null
+++ b/Marlin/src/HAL/STM32F1/tft/tft_spi.cpp
@@ -0,0 +1,149 @@
+/**
+ * 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/>.
+ *
+ */
+
+#include "../../../inc/MarlinConfig.h"
+
+#if HAS_SPI_TFT
+
+#include "tft_spi.h"
+
+// TFT_SPI tft;
+
+SPIClass TFT_SPI::SPIx(1);
+
+#define TFT_CS_H  OUT_WRITE(TFT_CS_PIN, HIGH)
+#define TFT_CS_L  OUT_WRITE(TFT_CS_PIN, LOW)
+
+#define TFT_DC_H  OUT_WRITE(TFT_DC_PIN, HIGH)
+#define TFT_DC_L  OUT_WRITE(TFT_DC_PIN, LOW)
+
+#define TFT_RST_H OUT_WRITE(TFT_RST_PIN, HIGH)
+#define TFT_RST_L OUT_WRITE(TFT_RST_PIN, LOW)
+
+#define TFT_BLK_H OUT_WRITE(TFT_BACKLIGHT_PIN, HIGH)
+#define TFT_BLK_L OUT_WRITE(TFT_BACKLIGHT_PIN, LOW)
+
+void TFT_SPI::Init() {
+  #if PIN_EXISTS(TFT_RESET)
+    // OUT_WRITE(TFT_RESET_PIN, HIGH);
+    TFT_RST_H;
+    delay(100);
+  #endif
+
+  #if PIN_EXISTS(TFT_BACKLIGHT)
+    // OUT_WRITE(TFT_BACKLIGHT_PIN, HIGH);
+    TFT_BLK_H;
+  #endif
+
+  TFT_DC_H;
+  TFT_CS_H;
+
+  /**
+   * STM32F1 APB2 = 72MHz, APB1 = 36MHz, max SPI speed of this MCU if 18Mhz
+   * STM32F1 has 3 SPI ports, SPI1 in APB2, SPI2/SPI3 in APB1
+   * so the minimum prescale of SPI1 is DIV4, SPI2/SPI3 is DIV2
+   */
+  #if SPI_DEVICE == 1
+    #define SPI_CLOCK_MAX SPI_CLOCK_DIV4
+  #else
+    #define SPI_CLOCK_MAX SPI_CLOCK_DIV2
+  #endif
+  uint8_t  clock;
+  uint8_t spiRate = SPI_FULL_SPEED;
+  switch (spiRate) {
+    case SPI_FULL_SPEED:    clock = SPI_CLOCK_MAX ;  break;
+    case SPI_HALF_SPEED:    clock = SPI_CLOCK_DIV4 ; break;
+    case SPI_QUARTER_SPEED: clock = SPI_CLOCK_DIV8 ; break;
+    case SPI_EIGHTH_SPEED:  clock = SPI_CLOCK_DIV16; break;
+    case SPI_SPEED_5:       clock = SPI_CLOCK_DIV32; break;
+    case SPI_SPEED_6:       clock = SPI_CLOCK_DIV64; break;
+    default:                clock = SPI_CLOCK_DIV2;  // Default from the SPI library
+  }
+  SPIx.setModule(1);
+  SPIx.setClockDivider(clock);
+  SPIx.setBitOrder(MSBFIRST);
+  SPIx.setDataMode(SPI_MODE0);
+}
+
+void TFT_SPI::DataTransferBegin(uint16_t DataSize) {
+  SPIx.setDataSize(DataSize);
+  SPIx.begin();
+  TFT_CS_L;
+}
+
+uint32_t TFT_SPI::GetID() {
+  uint32_t id;
+  id = ReadID(LCD_READ_ID);
+
+  if ((id & 0xFFFF) == 0 || (id & 0xFFFF) == 0xFFFF)
+    id = ReadID(LCD_READ_ID4);
+  return id;
+}
+
+uint32_t TFT_SPI::ReadID(uint16_t Reg) {
+  #if !PIN_EXISTS(TFT_MISO)
+    return 0;
+  #else
+    uint8_t d = 0;
+    uint32_t data = 0;
+    SPIx.setClockDivider(SPI_CLOCK_DIV16);
+    DataTransferBegin(DATASIZE_8BIT);
+    WriteReg(Reg);
+
+    LOOP_L_N(i, 4) {
+      SPIx.read((uint8_t*)&d, 1);
+      data = (data << 8) | d;
+    }
+
+    DataTransferEnd();
+    SPIx.setClockDivider(SPI_CLOCK_MAX);
+
+    return data >> 7;
+  #endif
+}
+
+bool TFT_SPI::isBusy() {
+  return false;
+}
+
+void TFT_SPI::Abort() {
+  DataTransferEnd();
+}
+
+void TFT_SPI::Transmit(uint16_t Data) {
+  SPIx.send(Data);
+}
+
+void TFT_SPI::TransmitDMA(uint32_t MemoryIncrease, uint16_t *Data, uint16_t Count) {
+  DataTransferBegin();
+  TFT_DC_H;
+  if (MemoryIncrease == DMA_MINC_ENABLE) {
+    SPIx.dmaSend(Data, Count, true);
+  }
+  else {
+    SPIx.dmaSend(Data, Count, false);
+  }
+
+  DataTransferEnd();
+}
+
+#endif // HAS_SPI_TFT