Tanguy Pruvot
5 years ago
committed by
Scott Lahteine
Scott Lahteine
6 changed files with 220 additions and 22 deletions
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/**
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* Marlin 3D Printer Firmware |
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* Copyright (C) 2019 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 <http://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 HAS_GRAPHICAL_LCD |
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#include "HAL.h" |
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#include <U8glib.h> |
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#undef SPI_SPEED |
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#define SPI_SPEED 0 // Fastest
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//#define SPI_SPEED 2 // Slower
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static uint8_t SPI_speed = SPI_SPEED; |
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static inline uint8_t swSpiTransfer_mode_0(uint8_t b, const uint8_t spi_speed, const pin_t miso_pin=-1) { |
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for (uint8_t i = 0; i < 8; i++) { |
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if (spi_speed == 0) { |
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WRITE(DOGLCD_MOSI, !!(b & 0x80)); |
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WRITE(DOGLCD_SCK, HIGH); |
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b <<= 1; |
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if (miso_pin >= 0 && READ(miso_pin)) b |= 1; |
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WRITE(DOGLCD_SCK, LOW); |
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} |
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else { |
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const uint8_t state = (b & 0x80) ? HIGH : LOW; |
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for (uint8_t j = 0; j < spi_speed; j++) |
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WRITE(DOGLCD_MOSI, state); |
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for (uint8_t j = 0; j < spi_speed + (miso_pin >= 0 ? 0 : 1); j++) |
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WRITE(DOGLCD_SCK, HIGH); |
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b <<= 1; |
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if (miso_pin >= 0 && READ(miso_pin)) b |= 1; |
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for (uint8_t j = 0; j < spi_speed; j++) |
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WRITE(DOGLCD_SCK, LOW); |
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} |
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} |
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return b; |
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} |
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static inline uint8_t swSpiTransfer_mode_3(uint8_t b, const uint8_t spi_speed, const pin_t miso_pin=-1) { |
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for (uint8_t i = 0; i < 8; i++) { |
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const uint8_t state = (b & 0x80) ? HIGH : LOW; |
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if (spi_speed == 0) { |
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WRITE(DOGLCD_SCK, LOW); |
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WRITE(DOGLCD_MOSI, state); |
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WRITE(DOGLCD_MOSI, state); // need some setup time
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WRITE(DOGLCD_SCK, HIGH); |
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} |
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else { |
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for (uint8_t j = 0; j < spi_speed + (miso_pin >= 0 ? 0 : 1); j++) |
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WRITE(DOGLCD_SCK, LOW); |
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for (uint8_t j = 0; j < spi_speed; j++) |
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WRITE(DOGLCD_MOSI, state); |
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for (uint8_t j = 0; j < spi_speed; j++) |
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WRITE(DOGLCD_SCK, HIGH); |
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} |
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b <<= 1; |
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if (miso_pin >= 0 && READ(miso_pin)) b |= 1; |
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} |
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return b; |
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} |
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static void u8g_sw_spi_HAL_STM32F1_shift_out(uint8_t val) { |
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#if ENABLED(FYSETC_MINI_12864) |
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swSpiTransfer_mode_3(val, SPI_speed); |
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#else |
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swSpiTransfer_mode_0(val, SPI_speed); |
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#endif |
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} |
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static uint8_t swSpiInit(const uint8_t spi_speed) { |
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#if PIN_EXISTS(LCD_RESET) |
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SET_OUTPUT(LCD_RESET_PIN); |
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#endif |
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SET_OUTPUT(DOGLCD_A0); |
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OUT_WRITE(DOGLCD_SCK, LOW); |
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OUT_WRITE(DOGLCD_MOSI, LOW); |
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OUT_WRITE(DOGLCD_CS, HIGH); |
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return spi_speed; |
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} |
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uint8_t u8g_com_HAL_STM32F1_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) { |
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switch (msg) { |
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case U8G_COM_MSG_INIT: |
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SPI_speed = swSpiInit(SPI_SPEED); |
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break; |
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case U8G_COM_MSG_STOP: |
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break; |
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case U8G_COM_MSG_RESET: |
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#if PIN_EXISTS(LCD_RESET) |
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WRITE(LCD_RESET_PIN, arg_val); |
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#endif |
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break; |
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case U8G_COM_MSG_CHIP_SELECT: |
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#if ENABLED(FYSETC_MINI_12864) // This LCD SPI is running mode 3 while SD card is running mode 0
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if (arg_val) { // SCK idle state needs to be set to the proper idle state before
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// the next chip select goes active
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WRITE(DOGLCD_SCK, HIGH); // Set SCK to mode 3 idle state before CS goes active
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WRITE(DOGLCD_CS, LOW); |
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} |
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else { |
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WRITE(DOGLCD_CS, HIGH); |
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WRITE(DOGLCD_SCK, LOW); // Set SCK to mode 0 idle state after CS goes inactive
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} |
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#else |
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WRITE(DOGLCD_CS, !arg_val); |
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#endif |
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break; |
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case U8G_COM_MSG_WRITE_BYTE: |
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u8g_sw_spi_HAL_STM32F1_shift_out(arg_val); |
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break; |
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case U8G_COM_MSG_WRITE_SEQ: { |
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uint8_t *ptr = (uint8_t *)arg_ptr; |
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while (arg_val > 0) { |
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u8g_sw_spi_HAL_STM32F1_shift_out(*ptr++); |
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arg_val--; |
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} |
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} break; |
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case U8G_COM_MSG_WRITE_SEQ_P: { |
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uint8_t *ptr = (uint8_t *)arg_ptr; |
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while (arg_val > 0) { |
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u8g_sw_spi_HAL_STM32F1_shift_out(u8g_pgm_read(ptr)); |
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ptr++; |
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arg_val--; |
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} |
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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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WRITE(DOGLCD_A0, arg_val); |
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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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