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hp_display.ino
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hp_display.ino
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/*
* hp_display - program for Arduino for replacing the display on some
* discontinued HP/Agilent/Keysight instruments.
* Copyright (C) 2019 Ragnar Sundblad
*
* This file is part of the hp_display program.
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include "hp_display_config.h" // include this before the other local files
#include "hp_display_spi.h"
#include "hp_msg_parse.h"
#include "oled_128x64.h"
#include "lcd_20x4_hd44780.h"
uint8_t debug = 0;
uint8_t debug_loopsps = 0;
uint8_t do_print_in_loop = 1;
uint16_t console_print_interval_ms = CONSOLE_PRINT_INTERVAL_MS;
unsigned long last_print_t = 0;
// some debug stuff
unsigned long loops_t = 0;
uint32_t loops_n = 0;
uint32_t loops_n_last = 0;
uint32_t updates_n = 0;
uint32_t updates_n_last = 0;
// ###############
// Setup
void setup() {
Serial.begin(115200);
setup_pins();
setup_hp_display_spi();
#ifdef LCD_20X4_HD44780
lcd_20x4_hd44780_setup();
#endif
#ifdef OLED_128X64
oled_128x64_setup();
#endif
}
// ###############
// Loop
void loop() {
static uint8_t last_spi_frames = 0;
static uint8_t updates_to_print = 0;
unsigned long now_ms = millis();
uint8_t do_print = 0;
// cap how often we print, needed on MCU:s without built in USB
if ((last_print_t + console_print_interval_ms) < now_ms) {
do_print = do_print_in_loop;
last_print_t = now_ms;
}
if (true) {
// parse commands
command_parser();
if ((last_spi_frames != spi_frames) || hp_display_spi_timeout()) { // is there a complete new frame?
last_spi_frames = spi_frames;
// update displays
update_disp();
update_disp_combined();
updates_to_print = 1;
#ifdef LCD_20X4_HD44780
lcd_20x4_hd44780_update();
#endif
#ifdef OLED_128X64
oled_128x64_update();
#endif
if (disp_change)
updates_n++;
}
if (do_print && updates_to_print) {
Serial.println("############");
print_display_combined();
updates_to_print = 0;
}
if (debug and do_print) {
print_display_fields();
#if 0
Serial.println(F("########### last msgs"));
hp_display_print_last_msgs();
Serial.println(F("########### last sync lost msgs"));
hp_display_print_last_sync_lost_msgs();
#endif
#if 0
Serial.println(F("########### Unknowns characters seen:"));
print_unknown_seg14s();
Serial.println(F("########### Unknowns separators seen:"));
print_unknown_separator();
#endif
#if 0
Serial.println(F("###########"));
char displ[17];
for(int8_t i = 15; i >= 0; i--) {
displ[15-i] = print_spi_msg(i, spi_msgs[i]);
}
// print message chars
displ[16] = '\0';
Serial.println(displ + 4);
// print highligt chars
displ[4] = '\0';
Serial.println(displ);
#endif
Serial.println(F("###########"));
hp_display_spi_print_debug();
}
// check how many loops we can run per second
if (debug_loopsps) {
{
unsigned long m_now = millis();
if (m_now > (loops_t + 1000)) {
loops_n_last = loops_n;
loops_n = 0;
updates_n_last = updates_n;
updates_n = 0;
loops_t = m_now;
}
loops_n++;
if (do_print) {
Serial.print(F("loops/s: "));
Serial.println(loops_n_last);
Serial.print(F("updates/s: "));
Serial.println(updates_n_last);
}
}
}
}
}
void print_display_fields() {
static uint8_t text[13];
static uint8_t seps[13];
static uint8_t highlights[13];
static uint8_t labels[13];
static uint8_t units_gate[6];
for(uint8_t i = 0; i < 12; i++) {
text[11-i] = disp_text[i];
seps[11-i] = disp_separators[i] ? disp_separators[i] : '_';
highlights[11-i] = disp_highlights[i] ? 'x' : '_';
labels[11-i] = disp_labels[i] ? 'x' : '_';
}
for(uint8_t i = 0; i < 5; i++) {
units_gate[i] = disp_units_gate[i] ? 'x' : '_';
}
text[12] = seps[12] = labels[12] = units_gate[5] = '\0';
Serial.print((const char*) text);
Serial.print(" ");
Serial.print((const char*) seps);
Serial.print(" ");
Serial.print((const char*) highlights);
Serial.print(" ");
Serial.print((const char*) labels);
Serial.print(" ");
Serial.println((const char*) units_gate);
Serial.println();
}
void print_display_combined() {
Serial.print(disp_text_combined);
Serial.print(" ");
Serial.println(disp_units_combined);
Serial.print(disp_labels_combined);
if(disp_units_gate[4] != 0) { // Gate
Serial.print(" ");
Serial.print(hp_display_units_gate[4]);
}
Serial.println();
}
// ###############
// Command handler
#define BUFLEN 16
char cmdbuf[BUFLEN + 1];
byte cmdi = 0;
unsigned long last_user_input_t = 0;
void command_parser() {
unsigned long now = millis();
if (Serial.available() > 0) {
int c = Serial.read();
last_user_input_t = now;
if (c == '\r' || c == '\n') {
Serial.println();
if (cmdi > 0) {
cmdbuf[cmdi] = '\0';
handle_command();
}
cmdi = 0;
print_prompt();
return;
}
// handle delete & backspace
if (c == 0x08 || c == 0x7f) {
if (cmdi > 0) {
cmdi--;
Serial.write("\b \b");
}
return;
}
if (cmdi >= BUFLEN) {
return;
}
if (!isPrintable(c)) {
return;
}
cmdbuf[cmdi] = c;
cmdi++;
//Serial.print(c, HEX);
Serial.write(c);
}
if (last_user_input_t > now) {
last_user_input_t = 0; // millis wrapped (which it does every 50 days or so), just reset
}
if ((last_user_input_t == 0) || (last_user_input_t + 10000) < now) {
do_print_in_loop = 1;
} else {
do_print_in_loop = 0;
}
}
void handle_command() {
if (match_command("help")) {
cmd_help();
} else if (cmdbuf[0] == 'c') {
cmd_c();
} else if (cmdbuf[0] == 'u') {
cmd_u();
} else if (match_command("debug")) {
cmd_debug();
} else if (match_command("lps")) {
cmd_lps();
} else {
Serial.print(F("unknown command: "));
Serial.println(cmdbuf);
}
}
bool match_command(char *cmd) {
if (strncmp(cmdbuf, cmd, strlen(cmdbuf)) == 0)
return true;
return false;
}
void print_prompt() {
Serial.flush();
Serial.print(F("> "));
}
void cmd_help() {
Serial.println(F("commands:"));
Serial.println(F("help - show this information"));
Serial.println(F("continue - continue printout (without waiting for timeout)"));
Serial.println(F("unk - print accumulated unknown characters"));
Serial.println(F("debug - toggle debug printouts"));
Serial.println(F("lps - toggle loops per second printouts"));
Serial.println("");
}
void cmd_c() {
last_user_input_t = 0;
}
void cmd_u() {
Serial.println(F("########### Unknowns characters seen:"));
print_unknown_seg14s();
Serial.println(F("########### Unknowns separators seen:"));
print_unknown_separator();
}
void cmd_debug() {
debug = ~debug;
if (debug) {
Serial.println(F("debugging turned on."));
} else {
Serial.println(F("debugging turned off."));
}
}
void cmd_lps() {
debug_loopsps = ~debug_loopsps;
if (debug_loopsps) {
Serial.println(F("loops per second printout turned on."));
} else {
Serial.println(F("loops per second printout turned off."));
}
}
// ###############
// Setup stuff
void setup_pins() {
// unused pins
const uint8_t unused_d_ports[] = {0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10 /*, 14, 15, 16*/};
for(uint8_t i = 0; i < sizeof(unused_d_ports); i++) {
pinMode(i, INPUT);
digitalWrite(i, HIGH);
}
#ifndef ARDUINO_NANO
// Port F, pins 4..7, analog inputs A0-A3
const uint8_t pins = 0xf0;
DDRF &= ~pins; // mask of bit to make it input
PORTF |= pins; // set reg 1 to enable pull-up resistor
#endif
}