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/*** Marlin 3D Printer Firmware* Copyright (C) 2016 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/>.**/#ifndef ULCDST7920_H#define ULCDST7920_H#include <U8glib.h>#include "delay.h"#define ST7920_CLK_PIN LCD_PINS_D4#define ST7920_DAT_PIN LCD_PINS_ENABLE#define ST7920_CS_PIN LCD_PINS_RS//#define PAGE_HEIGHT 8 //128 byte framebuffer#define PAGE_HEIGHT 16 //256 byte framebuffer//#define PAGE_HEIGHT 32 //512 byte framebuffer#define LCD_PIXEL_WIDTH 128#define LCD_PIXEL_HEIGHT 64//set optimization so ARDUINO optimizes this file#pragma GCC optimize (3)// If you want you can define your own set of delays in Configuration.h//#define ST7920_DELAY_1 DELAY_NS(0)//#define ST7920_DELAY_2 DELAY_NS(0)//#define ST7920_DELAY_3 DELAY_NS(0)#if F_CPU >= 20000000#define CPU_ST7920_DELAY_1 DELAY_NS(0)#define CPU_ST7920_DELAY_2 DELAY_NS(0)#define CPU_ST7920_DELAY_3 DELAY_NS(50)#elif MB(3DRAG) || MB(K8200) || MB(K8400) || MB(SILVER_GATE)#define CPU_ST7920_DELAY_1 DELAY_NS(0)#define CPU_ST7920_DELAY_2 DELAY_NS(188)#define CPU_ST7920_DELAY_3 DELAY_NS(0)#elif MB(MINIRAMBO) || MB(EINSY_RAMBO) || MB(EINSY_RETRO)#define CPU_ST7920_DELAY_1 DELAY_NS(0)#define CPU_ST7920_DELAY_2 DELAY_NS(250)#define CPU_ST7920_DELAY_3 DELAY_NS(0)#elif MB(RAMBO)#define CPU_ST7920_DELAY_1 DELAY_NS(0)#define CPU_ST7920_DELAY_2 DELAY_NS(0)#define CPU_ST7920_DELAY_3 DELAY_NS(0)#elif MB(BQ_ZUM_MEGA_3D)#define CPU_ST7920_DELAY_1 DELAY_NS(0)#define CPU_ST7920_DELAY_2 DELAY_NS(0)#define CPU_ST7920_DELAY_3 DELAY_NS(189)#elif F_CPU == 16000000#define CPU_ST7920_DELAY_1 DELAY_NS(0)#define CPU_ST7920_DELAY_2 DELAY_NS(0)#define CPU_ST7920_DELAY_3 DELAY_NS(63)#else#error "No valid condition for delays in 'ultralcd_st7920_u8glib_rrd.h'"#endif#ifndef ST7920_DELAY_1#define ST7920_DELAY_1 CPU_ST7920_DELAY_1#endif#ifndef ST7920_DELAY_2#define ST7920_DELAY_2 CPU_ST7920_DELAY_2#endif#ifndef ST7920_DELAY_3#define ST7920_DELAY_3 CPU_ST7920_DELAY_3#endif#define ST7920_SND_BIT \WRITE(ST7920_CLK_PIN, LOW); ST7920_DELAY_1; \WRITE(ST7920_DAT_PIN, val & 0x80); ST7920_DELAY_2; \WRITE(ST7920_CLK_PIN, HIGH); ST7920_DELAY_3; \val <<= 1static void ST7920_SWSPI_SND_8BIT(uint8_t val) {ST7920_SND_BIT; // 1ST7920_SND_BIT; // 2ST7920_SND_BIT; // 3ST7920_SND_BIT; // 4ST7920_SND_BIT; // 5ST7920_SND_BIT; // 6ST7920_SND_BIT; // 7ST7920_SND_BIT; // 8}#if DOGM_SPI_DELAY_US > 0#define U8G_DELAY() DELAY_US(DOGM_SPI_DELAY_US)#else#define U8G_DELAY() u8g_10MicroDelay()#endif#define ST7920_CS() { WRITE(ST7920_CS_PIN,1); U8G_DELAY(); }#define ST7920_NCS() { WRITE(ST7920_CS_PIN,0); }#define ST7920_SET_CMD() { ST7920_SWSPI_SND_8BIT(0xF8); U8G_DELAY(); }#define ST7920_SET_DAT() { ST7920_SWSPI_SND_8BIT(0xFA); U8G_DELAY(); }#define ST7920_WRITE_BYTE(a) { ST7920_SWSPI_SND_8BIT((uint8_t)((a)&0xF0u)); ST7920_SWSPI_SND_8BIT((uint8_t)((a)<<4u)); U8G_DELAY(); }#define ST7920_WRITE_BYTES(p,l) { for (uint8_t i = l + 1; --i;) { ST7920_SWSPI_SND_8BIT(*p&0xF0); ST7920_SWSPI_SND_8BIT(*p<<4); p++; } U8G_DELAY(); }uint8_t u8g_dev_rrd_st7920_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg) {uint8_t i, y;switch (msg) {case U8G_DEV_MSG_INIT: {OUT_WRITE(ST7920_CS_PIN, LOW);OUT_WRITE(ST7920_DAT_PIN, LOW);OUT_WRITE(ST7920_CLK_PIN, HIGH);ST7920_CS();u8g_Delay(120); //initial delay for boot upST7920_SET_CMD();ST7920_WRITE_BYTE(0x20); //non-extended modeST7920_WRITE_BYTE(0x08); //display off, cursor+blink offST7920_WRITE_BYTE(0x01); //clear DDRAM ramu8g_Delay(15); //delay for DDRAM clearST7920_WRITE_BYTE(0x24); //extended modeST7920_WRITE_BYTE(0x26); //extended mode + GDRAM activefor (y = 0; y < (LCD_PIXEL_HEIGHT) / 2; y++) { //clear GDRAMST7920_WRITE_BYTE(0x80 | y); //set yST7920_WRITE_BYTE(0x80); //set x = 0ST7920_SET_DAT();for (i = 0; i < 2 * (LCD_PIXEL_WIDTH) / 8; i++) //2x width clears both segmentsST7920_WRITE_BYTE(0);ST7920_SET_CMD();}ST7920_WRITE_BYTE(0x0C); //display on, cursor+blink offST7920_NCS();}break;case U8G_DEV_MSG_STOP: break;case U8G_DEV_MSG_PAGE_NEXT: {uint8_t* ptr;u8g_pb_t* pb = (u8g_pb_t*)(dev->dev_mem);y = pb->p.page_y0;ptr = (uint8_t*)pb->buf;ST7920_CS();for (i = 0; i < PAGE_HEIGHT; i ++) {ST7920_SET_CMD();if (y < 32) {ST7920_WRITE_BYTE(0x80 | y); //yST7920_WRITE_BYTE(0x80); //x=0}else {ST7920_WRITE_BYTE(0x80 | (y - 32)); //yST7920_WRITE_BYTE(0x80 | 8); //x=64}ST7920_SET_DAT();ST7920_WRITE_BYTES(ptr, (LCD_PIXEL_WIDTH) / 8); //ptr is incremented inside of macroy++;}ST7920_NCS();}break;}#if PAGE_HEIGHT == 8return u8g_dev_pb8h1_base_fn(u8g, dev, msg, arg);#elif PAGE_HEIGHT == 16return u8g_dev_pb16h1_base_fn(u8g, dev, msg, arg);#elsereturn u8g_dev_pb32h1_base_fn(u8g, dev, msg, arg);#endif}uint8_t u8g_dev_st7920_128x64_rrd_buf[(LCD_PIXEL_WIDTH) * (PAGE_HEIGHT) / 8] U8G_NOCOMMON;u8g_pb_t u8g_dev_st7920_128x64_rrd_pb = {{PAGE_HEIGHT, LCD_PIXEL_HEIGHT, 0, 0, 0}, LCD_PIXEL_WIDTH, u8g_dev_st7920_128x64_rrd_buf};u8g_dev_t u8g_dev_st7920_128x64_rrd_sw_spi = {u8g_dev_rrd_st7920_128x64_fn, &u8g_dev_st7920_128x64_rrd_pb, &u8g_com_null_fn};class U8GLIB_ST7920_128X64_RRD : public U8GLIB {public:U8GLIB_ST7920_128X64_RRD(uint8_t dummy) : U8GLIB(&u8g_dev_st7920_128x64_rrd_sw_spi) { UNUSED(dummy); }};#if ENABLED(LIGHTWEIGHT_UI)// We have to include the code for the lightweight UI here// as it relies on macros that are only defined in this file.#include "status_screen_lite_ST7920_spi.h"#endif#pragma GCC reset_options#endif // ULCDST7920_H