diff options
Diffstat (limited to 'Marlin/src/HAL/STM32F1/dogm')
| -rw-r--r-- | Marlin/src/HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/Marlin/src/HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp b/Marlin/src/HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp new file mode 100644 index 0000000..784a80c --- /dev/null +++ b/Marlin/src/HAL/STM32F1/dogm/u8g_com_stm32duino_swspi.cpp @@ -0,0 +1,166 @@ +/** + * 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_MARLINUI_U8GLIB, FORCE_SOFT_SPI) + +#include <U8glib.h> +#include "../../shared/HAL_SPI.h" + +#ifndef LCD_SPI_SPEED + #define LCD_SPI_SPEED SPI_FULL_SPEED // Fastest + //#define LCD_SPI_SPEED SPI_QUARTER_SPEED // Slower +#endif + +static uint8_t SPI_speed = LCD_SPI_SPEED; + +static inline uint8_t swSpiTransfer_mode_0(uint8_t b, const uint8_t spi_speed, const pin_t miso_pin=-1) { + LOOP_L_N(i, 8) { + if (spi_speed == 0) { + WRITE(DOGLCD_MOSI, !!(b & 0x80)); + WRITE(DOGLCD_SCK, HIGH); + b <<= 1; + if (miso_pin >= 0 && READ(miso_pin)) b |= 1; + WRITE(DOGLCD_SCK, LOW); + } + else { + const uint8_t state = (b & 0x80) ? HIGH : LOW; + LOOP_L_N(j, spi_speed) + WRITE(DOGLCD_MOSI, state); + + LOOP_L_N(j, spi_speed + (miso_pin >= 0 ? 0 : 1)) + WRITE(DOGLCD_SCK, HIGH); + + b <<= 1; + if (miso_pin >= 0 && READ(miso_pin)) b |= 1; + + LOOP_L_N(j, spi_speed) + WRITE(DOGLCD_SCK, LOW); + } + } + return b; +} + +static inline uint8_t swSpiTransfer_mode_3(uint8_t b, const uint8_t spi_speed, const pin_t miso_pin=-1) { + LOOP_L_N(i, 8) { + const uint8_t state = (b & 0x80) ? HIGH : LOW; + if (spi_speed == 0) { + WRITE(DOGLCD_SCK, LOW); + WRITE(DOGLCD_MOSI, state); + WRITE(DOGLCD_MOSI, state); // need some setup time + WRITE(DOGLCD_SCK, HIGH); + } + else { + LOOP_L_N(j, spi_speed + (miso_pin >= 0 ? 0 : 1)) + WRITE(DOGLCD_SCK, LOW); + + LOOP_L_N(j, spi_speed) + WRITE(DOGLCD_MOSI, state); + + LOOP_L_N(j, spi_speed) + WRITE(DOGLCD_SCK, HIGH); + } + b <<= 1; + if (miso_pin >= 0 && READ(miso_pin)) b |= 1; + } + return b; +} + +static void u8g_sw_spi_HAL_STM32F1_shift_out(uint8_t val) { + #if ENABLED(FYSETC_MINI_12864) + swSpiTransfer_mode_3(val, SPI_speed); + #else + swSpiTransfer_mode_0(val, SPI_speed); + #endif +} + +static uint8_t swSpiInit(const uint8_t spi_speed) { + #if PIN_EXISTS(LCD_RESET) + SET_OUTPUT(LCD_RESET_PIN); + #endif + SET_OUTPUT(DOGLCD_A0); + OUT_WRITE(DOGLCD_SCK, LOW); + OUT_WRITE(DOGLCD_MOSI, LOW); + OUT_WRITE(DOGLCD_CS, HIGH); + return spi_speed; +} + +uint8_t u8g_com_HAL_STM32F1_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) { + switch (msg) { + case U8G_COM_MSG_INIT: + SPI_speed = swSpiInit(LCD_SPI_SPEED); + break; + + case U8G_COM_MSG_STOP: + break; + + case U8G_COM_MSG_RESET: + #if PIN_EXISTS(LCD_RESET) + WRITE(LCD_RESET_PIN, arg_val); + #endif + break; + + case U8G_COM_MSG_CHIP_SELECT: + #if ENABLED(FYSETC_MINI_12864) // This LCD SPI is running mode 3 while SD card is running mode 0 + if (arg_val) { // SCK idle state needs to be set to the proper idle state before + // the next chip select goes active + WRITE(DOGLCD_SCK, HIGH); // Set SCK to mode 3 idle state before CS goes active + WRITE(DOGLCD_CS, LOW); + } + else { + WRITE(DOGLCD_CS, HIGH); + WRITE(DOGLCD_SCK, LOW); // Set SCK to mode 0 idle state after CS goes inactive + } + #else + WRITE(DOGLCD_CS, !arg_val); + #endif + break; + + case U8G_COM_MSG_WRITE_BYTE: + u8g_sw_spi_HAL_STM32F1_shift_out(arg_val); + break; + + case U8G_COM_MSG_WRITE_SEQ: { + uint8_t *ptr = (uint8_t *)arg_ptr; + while (arg_val > 0) { + u8g_sw_spi_HAL_STM32F1_shift_out(*ptr++); + arg_val--; + } + } break; + + case U8G_COM_MSG_WRITE_SEQ_P: { + uint8_t *ptr = (uint8_t *)arg_ptr; + while (arg_val > 0) { + u8g_sw_spi_HAL_STM32F1_shift_out(u8g_pgm_read(ptr)); + ptr++; + arg_val--; + } + } break; + + case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */ + WRITE(DOGLCD_A0, arg_val); + break; + } + return 1; +} + +#endif // HAS_MARLINUI_U8GLIB && FORCE_SOFT_SPI +#endif // STM32F1 |