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759 lines
21 KiB
759 lines
21 KiB
/*
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* Lightweight Status Screen for the RepRapDiscount Full
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* Graphics Smart Controller (ST7920-based 128x64 LCD)
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*
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* (c) 2017 Aleph Objects, Inc.
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*
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* The code in this page is free software: you can
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* redistribute it and/or modify it under the terms of the GNU
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* General Public License (GNU GPL) as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option)
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* any later version. The code is distributed WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU GPL for more details.
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*
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*/
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/* This is an implementation of a status screen for the RepRapDiscount
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* Full Graphics Smart Controller using native ST7920 commands rather
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* than using U8Glib.
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*
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* This alternative status screen makes use of the built-in character
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* generation capabilities of the ST7920 to update the status screen
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* with less SPI traffic and CPU use. In particular:
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*
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* - The fan and bed animations are handled using custom characters
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* that are stored in CGRAM. This allows for the animation to be
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* updated by writing a single character to the text-buffer (DDRAM).
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*
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* - All the information in the status screen is text that is written
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* to DDRAM, so the work of generating the bitmaps is offloaded to
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* the ST7920 rather than being render by U8Glib on the MCU.
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*
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* - The graphics buffer (GDRAM) is only used for static graphics
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* elements (nozzle and feedrate bitmaps) and for the progress
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* bar, so updates are sporadic.
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*/
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#include "duration_t.h"
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typedef const __FlashStringHelper *progmem_str;
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#include "ultralcd_impl_st7920_lite_status_screen.h"
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#define BUFFER_WIDTH 256
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#define BUFFER_HEIGHT 32
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#define DDRAM_LINE_1 0x00
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#define DDRAM_LINE_2 0x10
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#define DDRAM_LINE_3 0x08
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#define DDRAM_LINE_4 0x18
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ST7920_Lite_Status_Screen::st7920_state_t ST7920_Lite_Status_Screen::current_bits;
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void ST7920_Lite_Status_Screen::cmd(uint8_t cmd) {
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if(!current_bits.synced || !current_bits.cmd) {
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current_bits.synced = true;
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current_bits.cmd = true;
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sync_cmd();
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}
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write_byte(cmd);
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}
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void ST7920_Lite_Status_Screen::begin_data() {
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extended_function_set(false);
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if(!current_bits.synced || current_bits.cmd) {
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current_bits.synced = true;
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current_bits.cmd = false;
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sync_dat();
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}
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}
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void ST7920_Lite_Status_Screen::write_word(uint16_t w) {
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write_byte((w >> 8) & 0xFF);
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write_byte((w >> 0) & 0xFF);
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}
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void ST7920_Lite_Status_Screen::write_str(const char *str) {
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while(*str) {
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write_byte(*str++);
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}
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}
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void ST7920_Lite_Status_Screen::write_str(const char *str, uint8_t len) {
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while(*str && len--) {
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write_byte(*str++);
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}
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}
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void ST7920_Lite_Status_Screen::write_str_P(const char *str) {
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const char *p_str = (const char *)str;
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char c = pgm_read_byte_near(p_str++);
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while(c) {
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write_byte(c);
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c = pgm_read_byte_near(p_str++);
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}
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}
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void ST7920_Lite_Status_Screen::write_str(progmem_str str) {
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write_str_P((const char*)str);
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}
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void ST7920_Lite_Status_Screen::write_number(uint8_t value, uint8_t digits) {
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char str[7];
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const char *fmt;
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switch(digits) {
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case 6: fmt = PSTR("%6d"); break;
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case 5: fmt = PSTR("%5d"); break;
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case 4: fmt = PSTR("%4d"); break;
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case 3: fmt = PSTR("%3d"); break;
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case 2: fmt = PSTR("%2d"); break;
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case 1: fmt = PSTR("%1d"); break;
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}
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sprintf_P(str,fmt,value);
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write_str(str);
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}
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void ST7920_Lite_Status_Screen::display_status(bool display_on, bool cursor_on, bool blink_on) {
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extended_function_set(false);
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cmd(0b00001000 |
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(display_on ? 0b0100 : 0) |
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(cursor_on ? 0b0010 : 0) |
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(blink_on ? 0b0001 : 0)
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);
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}
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// Sets the extended and graphics bits simultaneously, regardless of
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// the current state. This is a helper function for extended_function_set()
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// and graphics()
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void ST7920_Lite_Status_Screen::_extended_function_set(bool extended, bool graphics) {
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cmd( 0b00100000 |
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(extended ? 0b00000100 : 0) |
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(graphics ? 0b00000010 : 0)
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);
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current_bits.extended = extended;
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current_bits.graphics = graphics;
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}
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void ST7920_Lite_Status_Screen::extended_function_set(bool extended) {
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if(extended != current_bits.extended) {
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_extended_function_set(extended, current_bits.graphics);
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}
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}
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void ST7920_Lite_Status_Screen::graphics(bool graphics) {
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if(graphics != current_bits.graphics) {
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_extended_function_set(current_bits.extended, graphics);
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}
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}
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void ST7920_Lite_Status_Screen::entry_mode_select(bool ac_increase, bool shift) {
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extended_function_set(false);
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cmd(0b00000100 |
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(ac_increase ? 0b00000010 : 0) |
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(shift ? 0b00000001 : 0)
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);
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}
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// Sets the sa bit regardless of the current state. This is a helper
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// function for scroll_or_addr_select()
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void ST7920_Lite_Status_Screen::_scroll_or_addr_select(bool sa) {
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extended_function_set(true);
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cmd(0b00100010 |
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(sa ? 0b000001 : 0)
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);
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current_bits.sa = sa;
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}
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void ST7920_Lite_Status_Screen::scroll_or_addr_select(bool sa) {
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if(sa != current_bits.sa) {
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_scroll_or_addr_select(sa);
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}
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}
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void ST7920_Lite_Status_Screen::set_ddram_address(uint8_t addr) {
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extended_function_set(false);
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cmd(0b10000000 | (addr & 0b00111111));
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}
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void ST7920_Lite_Status_Screen::set_cgram_address(uint8_t addr) {
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extended_function_set(false);
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cmd(0b01000000 | (addr & 0b00111111));
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}
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void ST7920_Lite_Status_Screen::set_gdram_address(uint8_t x, uint8_t y) {
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extended_function_set(true);
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cmd(0b10000000 | (y & 0b01111111));
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cmd(0b10000000 | (x & 0b00001111));
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}
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void ST7920_Lite_Status_Screen::clear() {
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extended_function_set(false);
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cmd(0x00000001);
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delay(15); //delay for CGRAM clear
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}
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void ST7920_Lite_Status_Screen::home() {
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extended_function_set(false);
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cmd(0x00000010);
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}
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/* This fills the entire text buffer with spaces */
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void ST7920_Lite_Status_Screen::clear_ddram()
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{
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set_ddram_address(DDRAM_LINE_1);
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begin_data();
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for(int i=0; i < 64;i++) {
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write_byte(' ');
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}
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}
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/* This fills the entire graphics buffer with zeros */
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void ST7920_Lite_Status_Screen::clear_gdram()
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{
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for(int y = 0; y < BUFFER_HEIGHT; y++) {
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set_gdram_address(0,y);
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begin_data();
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for(int i = 0; i < (BUFFER_WIDTH / 16); i++) {
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write_byte(0);
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write_byte(0);
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}
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}
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}
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void ST7920_Lite_Status_Screen::load_cgram_icon(uint16_t addr, const void *data) {
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const uint16_t *p_word = (const uint16_t *)data;
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set_cgram_address(addr);
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begin_data();
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for(int i = 0; i < 16; i++) {
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uint16_t word = pgm_read_word_near(p_word++);
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write_byte((word & 0xFF00) >> 8);
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write_byte((word & 0x00FF) >> 0);
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}
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}
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/* Draws an icon in GDRAM. The position is specified in
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as if they were DDRAM coordinates, i.e. the x position
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is [1-8], while the y position is [1-4] */
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void ST7920_Lite_Status_Screen::draw_gdram_icon(uint8_t x, uint8_t y, const void *data) {
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const uint16_t *p_word = (const uint16_t *)data;
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if(y > 2) {
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// Handle display folding
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y -= 2;
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x += 8;
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}
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x -= 1;
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y -= 1;
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for(int i = 0; i < 16; i++) {
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uint16_t word = pgm_read_word_near(p_word++);
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set_gdram_address(x,i+y*16);
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begin_data();
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write_byte((word & 0xFF00) >> 8);
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write_byte((word & 0x00FF) >> 0);
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}
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}
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/************************** MAIN SCREEN *************************************/
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void ST7920_Lite_Status_Screen::draw_static_elements() {
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scroll_or_addr_select(0);
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// Load the animated bed and fan icons
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load_cgram_icon(CGRAM_ICON_1_ADDR, heat1_icon);
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load_cgram_icon(CGRAM_ICON_2_ADDR, heat2_icon);
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load_cgram_icon(CGRAM_ICON_3_ADDR, fan1_icon);
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load_cgram_icon(CGRAM_ICON_4_ADDR, fan2_icon);
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// Draw the static icons in GDRAM
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draw_gdram_icon(1,1,nozzle_icon);
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#if EXTRUDERS == 2
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draw_gdram_icon(1,2,nozzle_icon);
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draw_gdram_icon(1,3,bed_icon);
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#else
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draw_gdram_icon(1,2,bed_icon);
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#endif
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draw_gdram_icon(6,2,feedrate_icon);
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// Draw the initial fan icon
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draw_fan_icon(false);
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}
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/* Although this is undocumented, the ST7920 allows the character
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* data buffer (DDRAM) to be used in conjunction with the graphics
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* bitmap buffer (CGRAM). The contents of the graphics buffer is
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* XORed with the data from the character generator. This allows
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* us to make the progess bar out of graphical data (the bar) and
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* text data (the percentage).
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*/
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void ST7920_Lite_Status_Screen::draw_progress_bar(uint8_t value) {
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#if EXTRUDERS == 1
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// If we have only one extruder, draw a long progress bar on the third line
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const int top = 1; // Top in pixels
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const int bottom = 13; // Bottom in pixels
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const int left = 8; // Left edge, in 16-bit words
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const int width = 5; // Width of progress bar, in 16-bit words
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#else
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const int top = 16 + 1; // Top in pixels
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const int bottom = 16 + 13; // Bottom in pixels
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const int left = 5; // Left edge, in 16-bit words
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const int width = 3; // Width of progress bar, in 16-bit words
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#endif
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const int char_pcnt = 100/width; // How many percent does each 16-bit word represent?
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// Draw the progress bar as a bitmap in CGRAM
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for(int y = top; y <= bottom; y++) {
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set_gdram_address(left,y);
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begin_data();
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for(int x = 0; x < width; x++) {
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uint16_t gfx_word = 0x0000;
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if((x+1)*char_pcnt <= value) {
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// Draw completely filled bytes
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gfx_word = 0xFFFF;
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} else if((x*char_pcnt) < value) {
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// Draw partially filled bytes
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gfx_word = int(0x8000) >> (value % char_pcnt)*16/char_pcnt;
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}
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// Draw the frame around the progress bar
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if(y == top || y == bottom) {
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// Draw top/bottom border
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gfx_word = 0xFFFF;
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} else if (x == (width-1)) {
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// Draw right border
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gfx_word |= 0x0001;
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} else if (x == 0) {
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// Draw left border
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gfx_word |= 0x8000;
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}
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write_word(gfx_word);
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}
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}
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// Draw the percentage as text in DDRAM
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#if EXTRUDERS == 1
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set_ddram_address(DDRAM_LINE_3 + 1);
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#else
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set_ddram_address(DDRAM_LINE_2 + left);
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#endif
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begin_data();
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if(value > 9) {
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write_number(value,4);
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write_str(F("% "));
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} else {
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write_number(value,3);
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write_str(F("% "));
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}
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}
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void ST7920_Lite_Status_Screen::draw_fan_icon(bool whichIcon) {
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set_ddram_address(DDRAM_LINE_1+5);
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begin_data();
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write_word(whichIcon ? CGRAM_ICON_3_WORD : CGRAM_ICON_4_WORD);
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}
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void ST7920_Lite_Status_Screen::draw_heat_icon(bool whichIcon, bool heating) {
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#if EXTRUDERS == 1
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set_ddram_address(DDRAM_LINE_2);
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#else
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set_ddram_address(DDRAM_LINE_3);
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#endif
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begin_data();
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if(heating) {
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write_word(whichIcon ? CGRAM_ICON_1_WORD : CGRAM_ICON_2_WORD);
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} else {
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write_byte(' ');
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write_byte(' ');
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}
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}
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#define FAR(a,b) (((a > b) ? (a-b) : (b-a)) > 1)
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void ST7920_Lite_Status_Screen::draw_extruder_1_temp(uint8_t temp, uint8_t target) {
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set_ddram_address(DDRAM_LINE_1+1);
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begin_data();
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write_number(temp);
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if(target && FAR(temp, target)) {
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write_str(F("\x1A"));
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write_number(target);
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} else {
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write_str(F(" "));
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}
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}
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void ST7920_Lite_Status_Screen::draw_extruder_2_temp(uint8_t temp, uint8_t target) {
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set_ddram_address(DDRAM_LINE_2+1);
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begin_data();
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write_number(temp);
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if(target && FAR(temp, target)) {
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write_str(F("\x1A"));
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write_number(target);
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} else {
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write_str(F(" "));
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}
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}
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void ST7920_Lite_Status_Screen::draw_bed_temp(uint8_t temp, uint8_t target) {
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#if EXTRUDERS == 1
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set_ddram_address(DDRAM_LINE_2+1);
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#else
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set_ddram_address(DDRAM_LINE_3+1);
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#endif
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begin_data();
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write_number(temp);
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if(target && FAR(temp, target)) {
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write_str(F("\x1A"));
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write_number(target);
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} else {
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write_str(F(" "));
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}
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}
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void ST7920_Lite_Status_Screen::draw_fan_speed(uint8_t value) {
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set_ddram_address(DDRAM_LINE_1+6);
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begin_data();
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write_number(value,4);
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}
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void ST7920_Lite_Status_Screen::draw_print_time(uint32_t elapsed) {
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const uint8_t hrs = elapsed/3600;
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const uint8_t min = (elapsed/60)%60;
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char str[7];
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sprintf_P(str,hrs > 99 ? PSTR("%03d:%02d") : PSTR(" %02d:%02d"),hrs,min);
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set_ddram_address(DDRAM_LINE_3+5);
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begin_data();
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write_str(str);
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}
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void ST7920_Lite_Status_Screen::draw_feedrate_percentage(uint8_t percentage) {
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// We only have enough room for the feedrate when
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// we have one extruder
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#if EXTRUDERS == 1
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set_ddram_address(DDRAM_LINE_2+6);
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begin_data();
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write_number(percentage,4);
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#endif
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}
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void ST7920_Lite_Status_Screen::draw_status_message(const char *str) {
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set_ddram_address(DDRAM_LINE_4);
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begin_data();
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#if ENABLED(STATUS_MESSAGE_SCROLLING)
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const uint8_t lcd_len = 16;
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const uint8_t padding = 2;
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uint8_t str_len = strlen(str);
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// Trim whitespace at the end of the str, as for some reason
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// messages like "Card Inserted" are padded with many spaces
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while(str_len > 0 && str[str_len-1] == ' ') {
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str_len--;
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}
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if(str_len <= lcd_len) {
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// It all fits on the LCD without scrolling
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write_str(str);
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} else {
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// Print the message repeatedly until covering the LCD
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uint8_t c = status_scroll_pos;
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for(uint8_t n = 0; n < lcd_len; n++) {
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write_byte(c < str_len ? str[c] : ' ');
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c++;
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c %= str_len + padding; // Wrap around
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}
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// Scroll the message
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if(status_scroll_pos == str_len + padding) {
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status_scroll_pos = 0;
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} else {
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status_scroll_pos++;
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}
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}
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#else
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write_str(str, 16);
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#endif
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}
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void ST7920_Lite_Status_Screen::draw_position(const float x, const float y, const float z, bool position_known) {
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char str[7];
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set_ddram_address(DDRAM_LINE_4);
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begin_data();
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// If position is unknown, flash the labels.
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const unsigned char alt_label = position_known ? 0 : (lcd_blink() ? ' ' : 0);
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dtostrf(x, -4, 0, str);
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write_byte(alt_label ? alt_label : 'X');
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write_str(str, 4);
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|
|
dtostrf(y, -4, 0, str);
|
|
write_byte(alt_label ? alt_label : 'Y');
|
|
write_str(str, 4);
|
|
|
|
dtostrf(z, -5, 1, str);
|
|
write_byte(alt_label ? alt_label : 'Z');
|
|
write_str(str, 5);
|
|
}
|
|
|
|
bool ST7920_Lite_Status_Screen::indicators_changed() {
|
|
// We only add the target temperatures to the checksum
|
|
// because the actual temps fluctuate so by updating
|
|
// them only during blinks we gain a bit of stability.
|
|
const bool blink = lcd_blink();
|
|
const uint8_t feedrate_perc = feedrate_percentage;
|
|
const uint8_t fan_speed = ((fanSpeeds[0] + 1) * 100) / 256;
|
|
const float extruder_1_target = thermalManager.degTargetHotend(0);
|
|
#if EXTRUDERS == 2
|
|
const float extruder_2_target = thermalManager.degTargetHotend(1);
|
|
#endif
|
|
const float bed_target = thermalManager.degTargetBed();
|
|
|
|
static uint8_t last_checksum = 0;
|
|
|
|
const uint8_t checksum =
|
|
uint8_t(blink) ^
|
|
uint8_t(feedrate_perc) ^
|
|
uint8_t(fan_speed) ^
|
|
uint8_t(extruder_1_target) ^
|
|
#if EXTRUDERS == 2
|
|
uint8_t(extruder_2_target) ^
|
|
#endif
|
|
uint8_t(bed_target);
|
|
|
|
if(last_checksum == checksum) {
|
|
return false;
|
|
} else {
|
|
last_checksum = checksum;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
void ST7920_Lite_Status_Screen::update_indicators(bool forceUpdate) {
|
|
if(forceUpdate || indicators_changed()) {
|
|
const bool blink = lcd_blink();
|
|
const duration_t elapsed = print_job_timer.duration();
|
|
const uint32_t seconds_elapsed = elapsed.value;
|
|
const uint8_t feedrate_perc = feedrate_percentage;
|
|
const uint8_t fan_speed = ((fanSpeeds[0] + 1) * 100) / 256;
|
|
const float extruder_1_temp = thermalManager.degHotend(0);
|
|
const float extruder_1_target = thermalManager.degTargetHotend(0);
|
|
#if EXTRUDERS == 2
|
|
const float extruder_2_temp = thermalManager.degHotend(1);
|
|
const float extruder_2_target = thermalManager.degTargetHotend(1);
|
|
#endif
|
|
const float bed_temp = thermalManager.degBed();
|
|
const float bed_target = thermalManager.degTargetBed();
|
|
|
|
draw_extruder_1_temp(extruder_1_temp, extruder_1_target);
|
|
#if EXTRUDERS == 2
|
|
draw_extruder_2_temp(extruder_2_temp, extruder_2_target);
|
|
#endif
|
|
draw_bed_temp(bed_temp, bed_target);
|
|
draw_fan_speed(fan_speed);
|
|
draw_print_time(seconds_elapsed);
|
|
draw_feedrate_percentage(feedrate_perc);
|
|
|
|
// Update the fan and bed animations
|
|
if(fan_speed > 0) {
|
|
draw_fan_icon(blink);
|
|
}
|
|
if(bed_target > 0) {
|
|
draw_heat_icon(blink, true);
|
|
} else {
|
|
draw_heat_icon(false, false);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool ST7920_Lite_Status_Screen::position_changed() {
|
|
const float x_pos = current_position[X_AXIS];
|
|
const float y_pos = current_position[Y_AXIS];
|
|
const float z_pos = current_position[Z_AXIS];
|
|
const uint8_t checksum = uint8_t(x_pos) ^ uint8_t(y_pos) ^ uint8_t(z_pos);
|
|
|
|
static uint8_t last_checksum = 0;
|
|
if(last_checksum == checksum) {
|
|
return false;
|
|
} else {
|
|
last_checksum = checksum;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool ST7920_Lite_Status_Screen::status_changed() {
|
|
uint8_t checksum = 0;
|
|
for(const char *p = lcd_status_message; *p; p++) {
|
|
checksum ^= *p;
|
|
}
|
|
|
|
static uint8_t last_checksum = 0;
|
|
if(last_checksum == checksum) {
|
|
return false;
|
|
} else {
|
|
last_checksum = checksum;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool ST7920_Lite_Status_Screen::blink_changed() {
|
|
static uint8_t last_blink = 0;
|
|
|
|
const bool blink = lcd_blink();
|
|
if(last_blink == blink) {
|
|
return false;
|
|
} else {
|
|
last_blink = blink;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
void ST7920_Lite_Status_Screen::update_status_or_position(bool forceUpdate) {
|
|
static uint8_t countdown = 0;
|
|
|
|
/* There is only enough room in the display for either the
|
|
* status message or the position, not both, so we choose
|
|
* one or another. Whenever the status message changes,
|
|
* we show it for a number of consecutive seconds, but
|
|
* then go back to showing the position as soon as the
|
|
* head moves, i.e:
|
|
*
|
|
* countdown > 1 -- Show status
|
|
* countdown = 1 -- Show status, until movement
|
|
* countdown = 0 -- Show position
|
|
*/
|
|
if( forceUpdate || status_changed() ) {
|
|
#if ENABLED(STATUS_MESSAGE_SCROLLING)
|
|
status_scroll_pos = 0;
|
|
#endif
|
|
if(lcd_strlen(lcd_status_message)) {
|
|
countdown = LULZBOT_DELAY_TO_SHOW_POSITION;
|
|
} else {
|
|
countdown = 0;
|
|
}
|
|
draw_status_message(lcd_status_message);
|
|
blink_changed(); // Clear changed flag
|
|
}
|
|
else if(countdown > 1 && blink_changed() ) {
|
|
countdown--;
|
|
#if ENABLED(STATUS_MESSAGE_SCROLLING)
|
|
draw_status_message(lcd_status_message);
|
|
#endif
|
|
}
|
|
else if(countdown > 0 && blink_changed() ) {
|
|
if(position_changed()) {
|
|
countdown--;
|
|
forceUpdate = true;
|
|
}
|
|
#if ENABLED(STATUS_MESSAGE_SCROLLING)
|
|
draw_status_message(lcd_status_message);
|
|
#endif
|
|
}
|
|
if(countdown == 0 && (forceUpdate || position_changed() ||
|
|
#if DISABLED(DISABLE_REDUCED_ACCURACY_WARNING)
|
|
blink_changed()
|
|
#endif
|
|
)) {
|
|
draw_position(
|
|
current_position[X_AXIS],
|
|
current_position[Y_AXIS],
|
|
current_position[Z_AXIS],
|
|
#if ENABLED(DISABLE_REDUCED_ACCURACY_WARNING)
|
|
true
|
|
#else
|
|
axis_known_position[X_AXIS] &&
|
|
axis_known_position[Y_AXIS] &&
|
|
axis_known_position[Z_AXIS]
|
|
#endif
|
|
);
|
|
}
|
|
}
|
|
|
|
void ST7920_Lite_Status_Screen::update_progress(bool forceUpdate) {
|
|
#if ENABLED(SDSUPPORT)
|
|
const uint8_t percent_done = card.percentDone();
|
|
#else
|
|
const uint8_t percent_done = 0;
|
|
#endif
|
|
|
|
// Since the progress bar involves writing
|
|
// quite a few bytes to GDRAM, only do this
|
|
// when an update is actually necessary.
|
|
|
|
static uint8_t last_progress = 0;
|
|
if(!forceUpdate && last_progress == percent_done)
|
|
return;
|
|
last_progress = percent_done;
|
|
|
|
draw_progress_bar(percent_done);
|
|
}
|
|
|
|
void ST7920_Lite_Status_Screen::update(bool forceUpdate) {
|
|
cs();
|
|
update_indicators(forceUpdate);
|
|
update_status_or_position(forceUpdate);
|
|
update_progress(forceUpdate);
|
|
ncs();
|
|
}
|
|
|
|
void ST7920_Lite_Status_Screen::reset_state_from_unknown() {
|
|
_extended_function_set(true, true); // Do it twice as only one bit
|
|
_extended_function_set(true, true); // get set at a time.
|
|
_scroll_or_addr_select(false);
|
|
}
|
|
|
|
void ST7920_Lite_Status_Screen::on_entry() {
|
|
cs();
|
|
reset_state_from_unknown();
|
|
clear();
|
|
clear_gdram();
|
|
draw_static_elements();
|
|
update(true);
|
|
ncs();
|
|
}
|
|
|
|
void ST7920_Lite_Status_Screen::on_exit() {
|
|
cs();
|
|
clear();
|
|
_extended_function_set(true, true); // Restore state to what u8g expects.
|
|
ncs();
|
|
}
|
|
|
|
// This is called prior to the KILL screen to
|
|
// clear the screen so we don't end up with a
|
|
// garbled display.
|
|
void ST7920_Lite_Status_Screen::clear_text_buffer() {
|
|
cs();
|
|
reset_state_from_unknown();
|
|
clear();
|
|
_extended_function_set(true, true); // Restore state to what u8g expects.
|
|
ncs();
|
|
}
|
|
|
|
static void lcd_implementation_status_screen() {
|
|
ST7920_Lite_Status_Screen::update(false);
|
|
}
|
|
|
|
/* In order to properly update the lite status screen,
|
|
* we must know when we have entered and left the
|
|
* status screen. Since the ultralcd code is not
|
|
* set up for doing this, we call this function before
|
|
* each update indicating whether the current screen
|
|
* is the status screen.
|
|
*
|
|
* This function keeps track of whether we have left or
|
|
* entered the status screen and calls the on_entry()
|
|
* and on_exit() methods for cleanup.
|
|
*/
|
|
|
|
static void lcd_in_status(bool inStatus) {
|
|
static bool lastInStatus = false;
|
|
if(!lastInStatus && inStatus) {
|
|
ST7920_Lite_Status_Screen::on_entry();
|
|
lastInStatus = true;
|
|
}
|
|
if(lastInStatus && !inStatus) {
|
|
ST7920_Lite_Status_Screen::on_exit();
|
|
lastInStatus = false;
|
|
}
|
|
} |