First Commit
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MindCreeper03
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/*
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MIT License
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Copyright (c) 2018, Alexey Dynda
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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/**
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* !!!!!!!!!!!!!!!!!! RUNS ON ATMEGA328P ONLY !!!!!!!!!!!!!!!!!!!!
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* Nano/Atmega328 PINS:
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* A0 - blue channel of D-Sub connector
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* A1 - green channel of D-Sub connector
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* A2 - red channel of D-Sub connector
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* D9 - H-Sync of D-Sub connector
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* D3 - V-Sync of D-Sub connector
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*
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* Sketch allows to use all other PINs except A3-A6 pins.
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*
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* CONTROLLER will wait for commands over UART RX line.
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*
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* Nano/Atmega328 PINS:
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* RX - connect RX pin to TX pin of other board and run vga_client_demo on it.
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*
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*/
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#include "ssd1306.h"
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//#define VGA_CONTROLLER_DEBUG
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//#define SSD1306_VGA_SLEEP_MODE
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#define CONFIG_VGA_96X40_ENABLE
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#include "intf/vga/atmega328p/vga_isr.h"
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#include "lcd/vga_monitor.h"
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#include "intf/ssd1306_interface.h"
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// There are some issues if UART interrupt enabled with VGA output
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//#define UART_INTERRUPT_ENABLE
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#include "ssd1306_uart.h"
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/////////////////////////// UART /////////////////////////////////
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enum
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{
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UART_CMD_NONE = 0x00, // Module is waiting for any input on UART
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UART_CMD_PROXY = 0x01, // Module proxies all bytes to vga library interface
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UART_CMD_LISTEN = 0x02, // Module waits for command over UART
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UART_CMD_ESCAPE = 0x7D, // Escape symbol, next needs to be modified via ^0x20
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UART_CMD_FRAME_END = 0x7E, // Stop communication
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};
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/** Warning. May hold cpu while waiting for byte after 0x7D */
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void vga_uart_on_receive(uint8_t data)
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{
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static uint8_t s_uart_command = UART_CMD_NONE;
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static uint8_t s_uart_arg = 0;
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for(;;)
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{
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if (data == UART_CMD_FRAME_END)
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{
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if (s_uart_command != UART_CMD_NONE)
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{
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s_uart_command = UART_CMD_NONE;
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ssd1306_intf.stop();
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#ifdef VGA_CONTROLLER_DEBUG
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ssd1306_debug_print_vga_buffer(uart_send_byte);
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#endif
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}
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else
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{
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ssd1306_intf.start();
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}
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return;
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}
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if (data == UART_CMD_ESCAPE)
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{
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while (!uart_byte_available());
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data = uart_read_byte() ^ 0x20;
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}
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break;
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}
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if (s_uart_command == UART_CMD_NONE)
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{
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if ((data == 0x40) || (data == 0x00))
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{
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// Proxy standard LCD controller commands vga interface
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ssd1306_intf.send(data);
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s_uart_command = UART_CMD_PROXY;
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return;
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}
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s_uart_command = data;
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s_uart_arg = 0;
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}
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if (s_uart_command == UART_CMD_PROXY)
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{
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ssd1306_intf.send(data);
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return;
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}
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// command mode
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if (s_uart_command == UART_CMD_LISTEN)
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{
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s_uart_command = data;
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s_uart_arg = 0;
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}
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if (s_uart_command == 'C')
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{
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ssd1306_clearScreen();
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ssd1306_setCursor(0,0);
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s_uart_command = UART_CMD_LISTEN;
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}
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if (s_uart_command == 'T')
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{
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if (s_uart_arg) ssd1306_write(data);
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}
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if (s_uart_command == 'M')
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{
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if (s_uart_arg)
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{
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if (data >= '0') data -= '0';
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ssd1306_setMode(static_cast<lcd_mode_t>(data));
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s_uart_command = UART_CMD_LISTEN;
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}
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}
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s_uart_arg++;
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}
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/////////////////////////////// MAIN /////////////////////////////////////
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void setup()
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{
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uart_init(57600);
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// uart_init(115200);
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ssd1306_vga_controller_init();
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vga_96x40_8colors_init();
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ssd1306_setFixedFont(ssd1306xled_font6x8);
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ssd1306_clearScreen();
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ssd1306_printFixed(10,8,"SSD1306",STYLE_BOLD);
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ssd1306_printFixed(24,16,"by",STYLE_BOLD);
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ssd1306_printFixed(4,24,"Alexey D.",STYLE_BOLD);
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ssd1306_setColor(RGB_COLOR8(255,0,0));
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ssd1306_drawRect(0,0,95,39);
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#ifdef VGA_CONTROLLER_DEBUG
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ssd1306_debug_print_vga_buffer(uart_send_byte);
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#endif
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}
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void loop()
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{
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#ifdef SSD1306_VGA_SLEEP_MODE
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sleep_mode();
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#endif
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if (uart_byte_available())
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{
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uint8_t data = uart_read_byte();
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vga_uart_on_receive(data);
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}
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}
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