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- /**
- * 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_GRAPHICAL_LCD, SPI_GRAPHICAL_TFT) && DISABLED(FORCE_SOFT_SPI)
-
- #include "../HAL.h"
- #include <U8glib.h>
- #include <SPI.h>
-
- #define SPI_TFT_CS_H OUT_WRITE(SPI_TFT_CS_PIN, HIGH)
- #define SPI_TFT_CS_L OUT_WRITE(SPI_TFT_CS_PIN, LOW)
-
- #define SPI_TFT_DC_H OUT_WRITE(SPI_TFT_DC_PIN, HIGH)
- #define SPI_TFT_DC_L OUT_WRITE(SPI_TFT_DC_PIN, LOW)
-
- #define SPI_TFT_RST_H OUT_WRITE(SPI_TFT_RST_PIN, HIGH)
- #define SPI_TFT_RST_L OUT_WRITE(SPI_TFT_RST_PIN, LOW)
-
- #define SPI_TFT_BLK_H OUT_WRITE(LCD_BACKLIGHT_PIN, HIGH)
- #define SPI_TFT_BLK_L OUT_WRITE(LCD_BACKLIGHT_PIN, LOW)
-
- void LCD_IO_Init(uint8_t cs, uint8_t rs);
- void LCD_IO_WriteData(uint16_t RegValue);
- void LCD_IO_WriteReg(uint16_t Reg);
- uint16_t LCD_IO_ReadData(uint16_t RegValue);
- uint32_t LCD_IO_ReadData(uint16_t RegValue, uint8_t ReadSize);
- #ifdef LCD_USE_DMA_SPI
- void LCD_IO_WriteMultiple(uint16_t data, uint32_t count);
- void LCD_IO_WriteSequence(uint16_t *data, uint16_t length);
- #endif
-
- void LCD_WR_REG(uint8_t cmd) {
- SPI_TFT_CS_L;
- SPI_TFT_DC_L;
- SPI.send(cmd);
- SPI_TFT_CS_H;
- }
- void LCD_WR_DATA(uint8_t data) {
- SPI_TFT_CS_L;
- SPI_TFT_DC_H;
- SPI.send(data);
- SPI_TFT_CS_H;
- }
-
- void spi1Init(uint8_t spiRate) {
- SPI_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
- */
- uint8_t clock;
- switch (spiRate) {
- case SPI_FULL_SPEED: clock = SPI_CLOCK_DIV4; 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
- }
- SPI.setModule(1);
- SPI.begin();
- SPI.setClockDivider(clock);
- SPI.setBitOrder(MSBFIRST);
- SPI.setDataMode(SPI_MODE0);
- }
-
- void LCD_IO_Init(uint8_t cs, uint8_t rs) {
- spi1Init(SPI_FULL_SPEED);
- }
-
- void LCD_IO_WriteData(uint16_t RegValue) {
- LCD_WR_DATA(RegValue);
- }
-
- void LCD_IO_WriteReg(uint16_t Reg) {
- LCD_WR_REG(Reg);
- }
-
- uint16_t LCD_IO_ReadData(uint16_t RegValue) {
- uint16_t d = 0;
- SPI_TFT_CS_L;
-
- SPI_TFT_DC_L;
- SPI.send(RegValue);
- SPI_TFT_DC_H;
-
- SPI.read((uint8_t*)&d, 1); //dummy read
- SPI.read((uint8_t*)&d, 1);
-
- SPI_TFT_CS_H;
- return d >> 7;
- }
-
- uint32_t LCD_IO_ReadData(uint16_t RegValue, uint8_t ReadSize) {
- uint32_t data = 0;
- uint8_t d = 0;
- SPI_TFT_CS_L;
-
- SPI_TFT_DC_L;
- SPI.send(RegValue);
- SPI_TFT_DC_H;
-
- SPI.read((uint8_t*)&d, 1); //dummy read
- SPI.read((uint8_t*)&d, 1);
- data = d;
- while (--ReadSize) {
- data <<= 8;
- SPI.read((uint8_t*)&d, 1);
- data |= (d & 0xFF);
- }
-
- SPI_TFT_CS_H;
- return uint32_t(data >> 7);
- }
-
- #ifdef LCD_USE_DMA_SPI
- void LCD_IO_WriteMultiple(uint16_t data, uint32_t count) {
- if (SPI.getDataSize() == DATA_SIZE_8BIT) {
- count *= 2;
- }
- while (count > 0) {
- SPI_TFT_CS_L;
- SPI_TFT_DC_H;
- SPI.dmaSend(&data, 1, true);
- SPI_TFT_CS_H;
- count--;
- }
- }
-
- void LCD_IO_WriteSequence(uint16_t *data, uint16_t length) {
- if (SPI.getDataSize() == DATA_SIZE_8BIT) {
- length *= 2;
- }
- SPI_TFT_CS_L;
- SPI_TFT_DC_H;
- SPI.dmaSend(data, length, true);
- SPI_TFT_CS_H;
- }
-
- void LCD_IO_WriteSequence_Async(uint16_t *data, uint16_t length) {
- if (SPI.getDataSize() == DATA_SIZE_8BIT) {
- length *= 2;
- }
- SPI_TFT_CS_L;
- SPI_TFT_DC_H;
- SPI.dmaSendAsync(data, length, true);
- SPI_TFT_CS_H;
- }
-
- void LCD_IO_WaitSequence_Async() {
- SPI_TFT_CS_L;
- SPI_TFT_DC_H;
- SPI.dmaSendAsync(NULL, 0, true);
- SPI_TFT_CS_H;
- }
- #endif
-
- static uint8_t msgInitCount = 2; // Ignore all messages until 2nd U8G_COM_MSG_INIT
-
- #ifndef LCD_READ_ID
- #define LCD_READ_ID 0x04 // Read display identification information (0xD3 on ILI9341)
- #endif
-
- uint8_t u8g_com_stm32duino_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
- if (msgInitCount) {
- if (msg == U8G_COM_MSG_INIT) msgInitCount--;
- if (msgInitCount) return -1;
- }
-
- static uint8_t isCommand;
-
- LCD_IO_Init(-1, -1);
-
- switch (msg) {
- case U8G_COM_MSG_STOP: break;
- case U8G_COM_MSG_INIT:
- u8g_SetPIOutput(u8g, U8G_PI_RESET);
-
- u8g_Delay(50);
-
- if (arg_ptr) {
- spi1Init(SPI_EIGHTH_SPEED);
- *((uint32_t *)arg_ptr) = (LCD_READ_ID << 24) | LCD_IO_ReadData(LCD_READ_ID, 3);
- spi1Init(SPI_FULL_SPEED);
- }
- isCommand = 0;
- break;
-
- case U8G_COM_MSG_ADDRESS: // define cmd (arg_val = 0) or data mode (arg_val = 1)
- isCommand = arg_val == 0 ? 1 : 0;
- break;
-
- case U8G_COM_MSG_RESET:
- u8g_SetPILevel(u8g, U8G_PI_RESET, arg_val);
- break;
-
- case U8G_COM_MSG_WRITE_BYTE:
- if (isCommand)
- LCD_IO_WriteReg(arg_val);
- else
- LCD_IO_WriteData((uint16_t)arg_val);
- break;
-
- case U8G_COM_MSG_WRITE_SEQ:
- for (uint8_t i = 0; i < arg_val; i += 2)
- LCD_IO_WriteData(*(uint16_t *)(((uint32_t)arg_ptr) + i));
- break;
-
- }
- return 1;
- }
-
- #endif // HAS_GRAPHICAL_LCD
- #endif // STM32F1
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