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- /**
- * 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"
-
- SPIClass TFT_SPI::SPIx(1);
-
- void TFT_SPI::Init() {
- #if PIN_EXISTS(TFT_RESET)
- OUT_WRITE(TFT_RESET_PIN, HIGH);
- delay(100);
- #endif
-
- #if PIN_EXISTS(TFT_BACKLIGHT)
- OUT_WRITE(TFT_BACKLIGHT_PIN, HIGH);
- #endif
-
- OUT_WRITE(TFT_DC_PIN, HIGH);
- OUT_WRITE(TFT_CS_PIN, HIGH);
-
- /**
- * 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();
- OUT_WRITE(TFT_CS_PIN, LOW);
- }
-
- #ifdef TFT_DEFAULT_DRIVER
- #include "../../../lcd/tft_io/tft_ids.h"
- #endif
-
- 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);
- #ifdef TFT_DEFAULT_DRIVER
- if ((id & 0xFFFF) == 0 || (id & 0xFFFF) == 0xFFFF)
- id = TFT_DEFAULT_DRIVER;
- #endif
- }
- 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();
- OUT_WRITE(TFT_DC_PIN, HIGH);
- SPIx.dmaSend(Data, Count, MemoryIncrease == DMA_MINC_ENABLE);
- DataTransferEnd();
- }
-
- #endif // HAS_SPI_TFT
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