186 lines
5.8 KiB
C++
186 lines
5.8 KiB
C++
/**
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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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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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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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/**
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* Based on u8g_com_st7920_hw_spi.c
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*
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* Universal 8bit Graphics Library
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*
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* Copyright (c) 2011, olikraus@gmail.com
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef ARDUINO_ARCH_SAM
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#include "../../inc/MarlinConfigPre.h"
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#if ENABLED(U8GLIB_ST7920)
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#include "../shared/Delay.h"
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#include <U8glib.h>
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#include "u8g_com_HAL_DUE_sw_spi_shared.h"
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#define SPISEND_SW_DUE u8g_spiSend_sw_DUE_mode_0
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static uint8_t rs_last_state = 255;
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static void u8g_com_DUE_st7920_write_byte_sw_spi(uint8_t rs, uint8_t val) {
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if (rs != rs_last_state) { // time to send a command/data byte
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rs_last_state = rs;
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SPISEND_SW_DUE(rs ? 0x0FA : 0x0F8); // Command or Data
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DELAY_US(40); // give the controller some time to process the data: 20 is bad, 30 is OK, 40 is safe
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}
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SPISEND_SW_DUE(val & 0xF0);
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SPISEND_SW_DUE(val << 4);
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}
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uint8_t u8g_com_HAL_DUE_ST7920_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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SCK_pPio = g_APinDescription[u8g->pin_list[U8G_PI_SCK]].pPort;
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SCK_dwMask = g_APinDescription[u8g->pin_list[U8G_PI_SCK]].ulPin;
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MOSI_pPio = g_APinDescription[u8g->pin_list[U8G_PI_MOSI]].pPort;
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MOSI_dwMask = g_APinDescription[u8g->pin_list[U8G_PI_MOSI]].ulPin;
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u8g_SetPILevel_DUE(u8g, U8G_PI_CS, 0);
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u8g_SetPIOutput_DUE(u8g, U8G_PI_CS);
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u8g_SetPILevel_DUE(u8g, U8G_PI_SCK, 0);
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u8g_SetPIOutput_DUE(u8g, U8G_PI_SCK);
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u8g_SetPILevel_DUE(u8g, U8G_PI_MOSI, 0);
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u8g_SetPIOutput_DUE(u8g, U8G_PI_MOSI);
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SCK_pPio->PIO_CODR = SCK_dwMask; //SCK low - needed at power up but not after reset
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MOSI_pPio->PIO_CODR = MOSI_dwMask; //MOSI low - needed at power up but not after reset
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u8g_Delay(5);
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u8g->pin_list[U8G_PI_A0_STATE] = 0; /* initial RS state: command mode */
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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 (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPILevel_DUE(u8g, U8G_PI_RESET, arg_val);
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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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u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
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break;
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case U8G_COM_MSG_CHIP_SELECT:
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if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_CS])
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u8g_SetPILevel_DUE(u8g, U8G_PI_CS, arg_val); //note: the st7920 has an active high chip select
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break;
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case U8G_COM_MSG_WRITE_BYTE:
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u8g_com_DUE_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], 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_com_DUE_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], *ptr++);
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arg_val--;
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}
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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_com_DUE_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], *ptr++);
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arg_val--;
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}
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}
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break;
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}
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return 1;
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}
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#if ENABLED(LIGHTWEIGHT_UI)
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#include "../../lcd/ultralcd.h"
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#include "../shared/HAL_ST7920.h"
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#define ST7920_CS_PIN LCD_PINS_RS
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#if DOGM_SPI_DELAY_US > 0
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#define U8G_DELAY() DELAY_US(DOGM_SPI_DELAY_US)
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#else
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#define U8G_DELAY() DELAY_US(10)
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#endif
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void ST7920_cs() {
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WRITE(ST7920_CS_PIN, HIGH);
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U8G_DELAY();
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}
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void ST7920_ncs() {
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WRITE(ST7920_CS_PIN, LOW);
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}
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void ST7920_set_cmd() {
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SPISEND_SW_DUE(0xF8);
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DELAY_US(40);
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}
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void ST7920_set_dat() {
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SPISEND_SW_DUE(0xFA);
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DELAY_US(40);
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}
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void ST7920_write_byte(const uint8_t val) {
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SPISEND_SW_DUE(val & 0xF0);
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SPISEND_SW_DUE(val << 4);
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}
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#endif // LIGHTWEIGHT_UI
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#endif // U8GLIB_ST7920
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#endif // ARDUINO_ARCH_SAM
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