SPI Emulated DOGM (like FSMC_GRAPHICAL_TFT, but SPI) (#18817)
Victor Oliveira
4 years ago
committed by
Scott Lahteine
parent
0c1bf01cf7
commit
fc12ffcb30
@ -0,0 +1,236 @@
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/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#ifdef __STM32F1__
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#include "../../../inc/MarlinConfig.h"
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#if BOTH(HAS_GRAPHICAL_LCD, SPI_GRAPHICAL_TFT) && DISABLED(FORCE_SOFT_SPI)
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#include "../HAL.h"
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#include <U8glib.h>
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#include <SPI.h>
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#define SPI_TFT_CS_H OUT_WRITE(SPI_TFT_CS_PIN, HIGH)
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#define SPI_TFT_CS_L OUT_WRITE(SPI_TFT_CS_PIN, LOW)
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#define SPI_TFT_DC_H OUT_WRITE(SPI_TFT_DC_PIN, HIGH)
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#define SPI_TFT_DC_L OUT_WRITE(SPI_TFT_DC_PIN, LOW)
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#define SPI_TFT_RST_H OUT_WRITE(SPI_TFT_RST_PIN, HIGH)
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#define SPI_TFT_RST_L OUT_WRITE(SPI_TFT_RST_PIN, LOW)
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#define SPI_TFT_BLK_H OUT_WRITE(LCD_BACKLIGHT_PIN, HIGH)
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#define SPI_TFT_BLK_L OUT_WRITE(LCD_BACKLIGHT_PIN, LOW)
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void LCD_IO_Init(uint8_t cs, uint8_t rs);
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void LCD_IO_WriteData(uint16_t RegValue);
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void LCD_IO_WriteReg(uint16_t Reg);
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uint16_t LCD_IO_ReadData(uint16_t RegValue);
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uint32_t LCD_IO_ReadData(uint16_t RegValue, uint8_t ReadSize);
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#ifdef LCD_USE_DMA_SPI
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void LCD_IO_WriteMultiple(uint16_t data, uint32_t count);
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void LCD_IO_WriteSequence(uint16_t *data, uint16_t length);
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#endif
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void LCD_WR_REG(uint8_t cmd) {
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SPI_TFT_CS_L;
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SPI_TFT_DC_L;
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SPI.send(cmd);
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SPI_TFT_CS_H;
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}
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void LCD_WR_DATA(uint8_t data) {
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SPI_TFT_CS_L;
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SPI_TFT_DC_H;
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SPI.send(data);
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SPI_TFT_CS_H;
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}
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void spi1Init(uint8_t spiRate) {
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SPI_TFT_CS_H;
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/**
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* STM32F1 APB2 = 72MHz, APB1 = 36MHz, max SPI speed of this MCU if 18Mhz
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* STM32F1 has 3 SPI ports, SPI1 in APB2, SPI2/SPI3 in APB1
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* so the minimum prescale of SPI1 is DIV4, SPI2/SPI3 is DIV2
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*/
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uint8_t clock;
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switch (spiRate) {
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case SPI_FULL_SPEED: clock = SPI_CLOCK_DIV4; break;
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case SPI_HALF_SPEED: clock = SPI_CLOCK_DIV4; break;
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case SPI_QUARTER_SPEED: clock = SPI_CLOCK_DIV8; break;
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case SPI_EIGHTH_SPEED: clock = SPI_CLOCK_DIV16; break;
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case SPI_SPEED_5: clock = SPI_CLOCK_DIV32; break;
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case SPI_SPEED_6: clock = SPI_CLOCK_DIV64; break;
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default: clock = SPI_CLOCK_DIV2; // Default from the SPI library
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}
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SPI.setModule(1);
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SPI.begin();
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SPI.setClockDivider(clock);
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SPI.setBitOrder(MSBFIRST);
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SPI.setDataMode(SPI_MODE0);
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}
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void LCD_IO_Init(uint8_t cs, uint8_t rs) {
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spi1Init(SPI_FULL_SPEED);
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}
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void LCD_IO_WriteData(uint16_t RegValue) {
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LCD_WR_DATA(RegValue);
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}
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void LCD_IO_WriteReg(uint16_t Reg) {
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LCD_WR_REG(Reg);
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}
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uint16_t LCD_IO_ReadData(uint16_t RegValue) {
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uint16_t d = 0;
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SPI_TFT_CS_L;
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SPI_TFT_DC_L;
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SPI.send(RegValue);
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SPI_TFT_DC_H;
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SPI.read((uint8_t*)&d, 1); //dummy read
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SPI.read((uint8_t*)&d, 1);
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SPI_TFT_CS_H;
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return d >> 7;
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}
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uint32_t LCD_IO_ReadData(uint16_t RegValue, uint8_t ReadSize) {
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uint32_t data = 0;
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uint8_t d = 0;
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SPI_TFT_CS_L;
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SPI_TFT_DC_L;
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SPI.send(RegValue);
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SPI_TFT_DC_H;
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SPI.read((uint8_t*)&d, 1); //dummy read
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SPI.read((uint8_t*)&d, 1);
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data = d;
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while (--ReadSize) {
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data <<= 8;
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SPI.read((uint8_t*)&d, 1);
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data |= (d & 0xFF);
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}
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SPI_TFT_CS_H;
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return uint32_t(data >> 7);
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}
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#ifdef LCD_USE_DMA_SPI
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void LCD_IO_WriteMultiple(uint16_t data, uint32_t count) {
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if (SPI.getDataSize() == DATA_SIZE_8BIT) {
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count *= 2;
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}
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while (count > 0) {
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SPI_TFT_CS_L;
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SPI_TFT_DC_H;
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SPI.dmaSend(&data, 1, true);
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SPI_TFT_CS_H;
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count--;
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}
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}
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void LCD_IO_WriteSequence(uint16_t *data, uint16_t length) {
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if (SPI.getDataSize() == DATA_SIZE_8BIT) {
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length *= 2;
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}
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SPI_TFT_CS_L;
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SPI_TFT_DC_H;
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SPI.dmaSend(data, length, true);
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SPI_TFT_CS_H;
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}
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void LCD_IO_WriteSequence_Async(uint16_t *data, uint16_t length) {
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if (SPI.getDataSize() == DATA_SIZE_8BIT) {
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length *= 2;
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}
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SPI_TFT_CS_L;
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SPI_TFT_DC_H;
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SPI.dmaSendAsync(data, length, true);
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SPI_TFT_CS_H;
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}
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void LCD_IO_WaitSequence_Async() {
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SPI_TFT_CS_L;
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SPI_TFT_DC_H;
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SPI.dmaSendAsync(NULL, 0, true);
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SPI_TFT_CS_H;
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}
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#endif
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static uint8_t msgInitCount = 2; // Ignore all messages until 2nd U8G_COM_MSG_INIT
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#ifndef LCD_READ_ID
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#define LCD_READ_ID 0x04 // Read display identification information (0xD3 on ILI9341)
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#endif
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uint8_t u8g_com_stm32duino_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
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if (msgInitCount) {
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if (msg == U8G_COM_MSG_INIT) msgInitCount--;
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if (msgInitCount) return -1;
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}
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static uint8_t isCommand;
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LCD_IO_Init(-1, -1);
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switch (msg) {
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case U8G_COM_MSG_STOP: break;
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case U8G_COM_MSG_INIT:
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u8g_SetPIOutput(u8g, U8G_PI_RESET);
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u8g_Delay(50);
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if (arg_ptr) {
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spi1Init(SPI_EIGHTH_SPEED);
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*((uint32_t *)arg_ptr) = (LCD_READ_ID << 24) | LCD_IO_ReadData(LCD_READ_ID, 3);
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spi1Init(SPI_FULL_SPEED);
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}
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isCommand = 0;
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break;
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case U8G_COM_MSG_ADDRESS: // define cmd (arg_val = 0) or data mode (arg_val = 1)
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isCommand = arg_val == 0 ? 1 : 0;
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break;
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case U8G_COM_MSG_RESET:
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u8g_SetPILevel(u8g, U8G_PI_RESET, arg_val);
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break;
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case U8G_COM_MSG_WRITE_BYTE:
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if (isCommand)
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LCD_IO_WriteReg(arg_val);
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else
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LCD_IO_WriteData((uint16_t)arg_val);
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break;
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case U8G_COM_MSG_WRITE_SEQ:
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for (uint8_t i = 0; i < arg_val; i += 2)
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LCD_IO_WriteData(*(uint16_t *)(((uint32_t)arg_ptr) + i));
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break;
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}
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return 1;
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}
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#endif // HAS_GRAPHICAL_LCD
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#endif // STM32F1
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