/** * 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 "Marlin.h" #if ENABLED(U8GLIB_ST7920) #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 #include <U8glib.h> //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_0_NOP //#define ST7920_DELAY_2 DELAY_0_NOP //#define ST7920_DELAY_3 DELAY_0_NOP #if F_CPU >= 20000000 #define CPU_ST7920_DELAY_1 DELAY_0_NOP #define CPU_ST7920_DELAY_2 DELAY_0_NOP #define CPU_ST7920_DELAY_3 DELAY_1_NOP #elif (MOTHERBOARD == BOARD_3DRAG) || (MOTHERBOARD == BOARD_K8200) || (MOTHERBOARD == BOARD_K8400) #define CPU_ST7920_DELAY_1 DELAY_0_NOP #define CPU_ST7920_DELAY_2 DELAY_3_NOP #define CPU_ST7920_DELAY_3 DELAY_0_NOP #elif (MOTHERBOARD == BOARD_MINIRAMBO) #define CPU_ST7920_DELAY_1 DELAY_0_NOP #define CPU_ST7920_DELAY_2 DELAY_4_NOP #define CPU_ST7920_DELAY_3 DELAY_0_NOP #elif (MOTHERBOARD == BOARD_RAMBO) #define CPU_ST7920_DELAY_1 DELAY_0_NOP #define CPU_ST7920_DELAY_2 DELAY_0_NOP #define CPU_ST7920_DELAY_3 DELAY_0_NOP #elif F_CPU == 16000000 #define CPU_ST7920_DELAY_1 DELAY_0_NOP #define CPU_ST7920_DELAY_2 DELAY_0_NOP #define CPU_ST7920_DELAY_3 DELAY_1_NOP #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 <<= 1 static void ST7920_SWSPI_SND_8BIT(uint8_t val) { ST7920_SND_BIT; // 1 ST7920_SND_BIT; // 2 ST7920_SND_BIT; // 3 ST7920_SND_BIT; // 4 ST7920_SND_BIT; // 5 ST7920_SND_BIT; // 6 ST7920_SND_BIT; // 7 ST7920_SND_BIT; // 8 } #if defined(DOGM_SPI_DELAY_US) && DOGM_SPI_DELAY_US > 0 #define U8G_DELAY() delayMicroseconds(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 up ST7920_SET_CMD(); ST7920_WRITE_BYTE(0x08); //display off, cursor+blink off ST7920_WRITE_BYTE(0x01); //clear CGRAM ram u8g_Delay(15); //delay for CGRAM clear ST7920_WRITE_BYTE(0x3E); //extended mode + GDRAM active for (y = 0; y < (LCD_PIXEL_HEIGHT) / 2; y++) { //clear GDRAM ST7920_WRITE_BYTE(0x80 | y); //set y ST7920_WRITE_BYTE(0x80); //set x = 0 ST7920_SET_DAT(); for (i = 0; i < 2 * (LCD_PIXEL_WIDTH) / 8; i++) //2x width clears both segments ST7920_WRITE_BYTE(0); ST7920_SET_CMD(); } ST7920_WRITE_BYTE(0x0C); //display on, cursor+blink off ST7920_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); //y ST7920_WRITE_BYTE(0x80); //x=0 } else { ST7920_WRITE_BYTE(0x80 | (y - 32)); //y ST7920_WRITE_BYTE(0x80 | 8); //x=64 } ST7920_SET_DAT(); ST7920_WRITE_BYTES(ptr, (LCD_PIXEL_WIDTH) / 8); //ptr is incremented inside of macro y++; } ST7920_NCS(); } break; } #if PAGE_HEIGHT == 8 return u8g_dev_pb8h1_base_fn(u8g, dev, msg, arg); #elif PAGE_HEIGHT == 16 return u8g_dev_pb16h1_base_fn(u8g, dev, msg, arg); #else return 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); } }; #pragma GCC reset_options #endif // U8GLIB_ST7920 #endif // ULCDST7920_H