mirror of
https://github.com/marqs85/ossc
synced 2025-11-01 00:16:03 +03:00
140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
//
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// Copyright (C) 2025 Balázs Triszka <info@balika011.hu>
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//
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// This file is part of Open Source Scan Converter project.
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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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#include <unistd.h>
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#include <string.h>
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#include "lcd.h"
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#include "sh1107.h"
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#include "alt_types.h"
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#include "altera_avalon_pio_regs.h"
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#include "i2c_opencores.h"
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#include "av_controller.h"
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#include "font12.h"
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#define OLED_WIDTH 128
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#define OLED_HEIGHT 64
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extern alt_u32 sys_ctrl;
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static void OLED_Write(uint8_t value)
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{
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SPI_write(I2CA_BASE, &value, 1);
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}
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void sh1107_init()
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{
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sys_ctrl &= ~(LCD_CS_N | LCD_RS);
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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alt_u8 init[] = {
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0xae, /*turn off OLED display*/
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0x00, /*set lower column address*/
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0x10, /*set higher column address*/
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0xb0, /*set page address*/
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0xdc, 0x00, /*set display start line*/
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0x81, /*contract control*/
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0x6f, /*128*/
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0x21, /* Set Memory addressing mode (0x20/0x21) */
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0xa1, /*set segment remap*/
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0xc0, /*Com scan direction*/
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0xa4, /*Disable Entire Display On (0xA4/0xA5)*/
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0xa6, /*normal / reverse*/
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0xa8, /*multiplex ratio*/
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0x3f, /*duty = 1/64*/
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0xd3, 0x60, /*set display offset*/
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0xd5, 0x41, /*set osc division*/
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0xd9, 0x22, /*set pre-charge period*/
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0xdb, 0x35, /*set vcomh*/
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0xad, /*set charge pump enable*/
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0x8a /*Set DC-DC enable (a=0:disable; a=1:enable) */
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};
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SPI_write(I2CA_BASE, init, sizeof(init));
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// Clear the screen
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OLED_Write(0xb0);
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for (alt_u8 i = 0; i < OLED_HEIGHT; i++)
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{
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sys_ctrl &= ~LCD_RS;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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OLED_Write(0x00 + (i & 0x0f));
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OLED_Write(0x10 + (i >> 4));
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sys_ctrl |= LCD_RS;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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for (alt_u8 i = 0; i < OLED_WIDTH / 8; i++)
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OLED_Write(0);
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}
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sys_ctrl &= ~LCD_RS;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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// Turn on
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OLED_Write(0xaf);
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sys_ctrl |= LCD_CS_N;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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}
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void sh1107_write(char *row1, char *row2)
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{
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sys_ctrl &= ~(LCD_CS_N | LCD_RS);
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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alt_u8 row1len = strnlen(row1, LCD_ROW_LEN);
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for (alt_u8 i = 0; i < 12; i++)
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{
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sys_ctrl &= ~LCD_RS;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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OLED_Write(0xb0);
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OLED_Write(0x00 + ((i + 13) & 0x0f));
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OLED_Write(0x10 + ((i + 13) >> 4));
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sys_ctrl |= LCD_RS;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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for (alt_u8 j = 0; j < row1len; j++)
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OLED_Write(Font12_Table[(row1[j] - 0x20) * 12 + i]);
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for (alt_u8 j = row1len; j < LCD_ROW_LEN; j++)
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OLED_Write(Font12_Table[i]);
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}
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alt_u8 row2len = strnlen(row2, LCD_ROW_LEN);
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for (alt_u8 i = 0; i < 12; i++)
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{
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sys_ctrl &= ~LCD_RS;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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OLED_Write(0xb0);
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OLED_Write(0x00 + ((i + 39) & 0x0f));
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OLED_Write(0x10 + ((i + 39) >> 4));
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sys_ctrl |= LCD_RS;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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for (alt_u8 j = 0; j < row2len; j++)
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OLED_Write(Font12_Table[(row2[j] - 0x20) * 12 + i]);
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for (alt_u8 j = row2len; j < LCD_ROW_LEN; j++)
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OLED_Write(Font12_Table[i]);
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}
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sys_ctrl |= LCD_CS_N;
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IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, sys_ctrl);
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}
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