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- /**
- * Marlin 3D Printer Firmware
- * Copyright (C) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * 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 <http://www.gnu.org/licenses/>.
- *
- */
-
- /**
- * Based on u8g_com_st7920_hw_spi.c
- *
- * Universal 8bit Graphics Library
- *
- * Copyright (c) 2011, olikraus@gmail.com
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright notice, this list
- * of conditions and the following disclaimer.
- *
- * * Redistributions in binary form must reproduce the above copyright notice, this
- * list of conditions and the following disclaimer in the documentation and/or other
- * materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- #ifdef ARDUINO_ARCH_SAM
-
- #include "../../inc/MarlinConfigPre.h"
-
- #if HAS_GRAPHICAL_LCD
-
- #include <U8glib.h>
- #include <Arduino.h>
- #include "../shared/Delay.h"
-
- void u8g_SetPIOutput_DUE(u8g_t *u8g, uint8_t pin_index) {
- PIO_Configure(g_APinDescription[u8g->pin_list[pin_index]].pPort, PIO_OUTPUT_1,
- g_APinDescription[u8g->pin_list[pin_index]].ulPin, g_APinDescription[u8g->pin_list[pin_index]].ulPinConfiguration); // OUTPUT
- }
-
- void u8g_SetPILevel_DUE(u8g_t *u8g, uint8_t pin_index, uint8_t level) {
- volatile Pio* port = g_APinDescription[u8g->pin_list[pin_index]].pPort;
- uint32_t mask = g_APinDescription[u8g->pin_list[pin_index]].ulPin;
- if (level) port->PIO_SODR = mask; else port->PIO_CODR = mask;
- }
-
- Pio *SCK_pPio, *MOSI_pPio;
- uint32_t SCK_dwMask, MOSI_dwMask;
-
- static void spiSend_sw_DUE(uint8_t val) { // 800KHz
- for (uint8_t i = 0; i < 8; i++) {
- if (val & 0x80)
- MOSI_pPio->PIO_SODR = MOSI_dwMask;
- else
- MOSI_pPio->PIO_CODR = MOSI_dwMask;
- DELAY_NS(48);
- SCK_pPio->PIO_SODR = SCK_dwMask;
- DELAY_NS(905); // 762 dead, 810 garbage, 858/0 900kHz, 905/1 825k, 953/1 800k, 1000/2 725KHz
- val <<= 1;
- SCK_pPio->PIO_CODR = SCK_dwMask;
- }
- }
-
- static uint8_t rs_last_state = 255;
-
- static void u8g_com_DUE_st7920_write_byte_sw_spi(uint8_t rs, uint8_t val) {
- if (rs != rs_last_state) { // time to send a command/data byte
- rs_last_state = rs;
- spiSend_sw_DUE(rs ? 0x0FA : 0x0F8); // Command or Data
- DELAY_US(40); // give the controller some time to process the data: 20 is bad, 30 is OK, 40 is safe
- }
- spiSend_sw_DUE(val & 0x0F0);
- spiSend_sw_DUE(val << 4);
- }
-
- uint8_t u8g_com_HAL_DUE_ST7920_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
- switch (msg) {
- case U8G_COM_MSG_INIT:
- SCK_pPio = g_APinDescription[u8g->pin_list[U8G_PI_SCK]].pPort;
- SCK_dwMask = g_APinDescription[u8g->pin_list[U8G_PI_SCK]].ulPin;
- MOSI_pPio = g_APinDescription[u8g->pin_list[U8G_PI_MOSI]].pPort;
- MOSI_dwMask = g_APinDescription[u8g->pin_list[U8G_PI_MOSI]].ulPin;
-
- u8g_SetPILevel_DUE(u8g, U8G_PI_CS, 0);
- u8g_SetPIOutput_DUE(u8g, U8G_PI_CS);
- u8g_SetPILevel_DUE(u8g, U8G_PI_SCK, 0);
- u8g_SetPIOutput_DUE(u8g, U8G_PI_SCK);
- u8g_SetPILevel_DUE(u8g, U8G_PI_MOSI, 0);
- u8g_SetPIOutput_DUE(u8g, U8G_PI_MOSI);
-
- SCK_pPio->PIO_CODR = SCK_dwMask; //SCK low - needed at power up but not after reset
- MOSI_pPio->PIO_CODR = MOSI_dwMask; //MOSI low - needed at power up but not after reset
-
- u8g_Delay(5);
-
- u8g->pin_list[U8G_PI_A0_STATE] = 0; /* inital RS state: command mode */
- break;
-
- case U8G_COM_MSG_STOP:
- break;
-
- case U8G_COM_MSG_RESET:
- if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_RESET]) u8g_SetPILevel_DUE(u8g, U8G_PI_RESET, arg_val);
- break;
-
- case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
- u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
- break;
-
- case U8G_COM_MSG_CHIP_SELECT:
- if (U8G_PIN_NONE != u8g->pin_list[U8G_PI_CS])
- u8g_SetPILevel_DUE(u8g, U8G_PI_CS, arg_val); //note: the st7920 has an active high chip select
- break;
-
- case U8G_COM_MSG_WRITE_BYTE:
-
- u8g_com_DUE_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], arg_val);
- break;
-
- case U8G_COM_MSG_WRITE_SEQ: {
- uint8_t *ptr = (uint8_t*) arg_ptr;
- while (arg_val > 0) {
- u8g_com_DUE_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], *ptr++);
- arg_val--;
- }
- }
- break;
-
- case U8G_COM_MSG_WRITE_SEQ_P: {
- uint8_t *ptr = (uint8_t*) arg_ptr;
- while (arg_val > 0) {
- u8g_com_DUE_st7920_write_byte_sw_spi(u8g->pin_list[U8G_PI_A0_STATE], *ptr++);
- arg_val--;
- }
- }
- break;
- }
- return 1;
- }
-
- #endif // HAS_GRAPHICAL_LCD
-
- #endif // ARDUINO_ARCH_SAM
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