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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"
// 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
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