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Added terminal stuff (experimental)

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pull/30/head
Ondřej Hruška 7 years ago
parent e8f3c4d0ff
commit fd6587d2bb
12 changed files with 1581 additions and 27 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 3
      build_parser.sh
  2. 2
      html/index.html
  3. 2
      html/script.js
  4. 2
      html_orig/index.html
  5. 73
      html_orig/script.js
  6. 447
      user/ansi_parser.c
  7. 24
      user/ansi_parser.h
  8. 312
      user/ansi_parser.rl
  9. 559
      user/screen.c
  10. 135
      user/screen.h
  11. 5
      user/serial.c
  12. 44
      user/user_main.c

3
build_parser.sh
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@ -0,0 +1,3 @@
#!/bin/bash
ragel -L -G0 user/ansi_parser.rl -o user/ansi_parser.c

2
html/index.html
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@ -1 +1 @@
<!doctype html><meta charset=utf-8><title>ESP8266 Remote Terminal</title><meta name=viewport content="width=device-width,shrink-to-fit=no,user-scalable=no,initial-scale=1,maximum-scale=1,minimum-scale=1"><link rel=stylesheet href=style.css><script src=script.js></script><header>ESP8266 Remote Terminal</header><div id=screen></div><div id=buttons><button>1</button><button>2</button><button>3</button><button>4</button></div><script>init()</script>
<!doctype html><meta charset=utf-8><title>ESP8266 Remote Terminal</title><meta name=viewport content="width=device-width,shrink-to-fit=no,user-scalable=no,initial-scale=1,maximum-scale=1,minimum-scale=1"><link rel=stylesheet href=style.css><script src=script.js></script><header>ESP8266 Remote Terminal</header><div id=screen></div><div id=buttons><button>1</button><button>2</button><button>3</button><button>4</button></div><script>init(%screenData%)</script>

2
html/script.js
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@ -1 +1 @@
var $=function(d,c){d=d.match(/^(\W)?(.*)/);return(c||document)["getElement"+(d[1]?d[1]=="#"?"ById":"sByClassName":"sByTagName")](d[2])};var m=function(e,d,f){d=document;f=d.createElement("p");f.innerHTML=e;e=d.createDocumentFragment();while(d=f.firstChild){e.appendChild(d)}return e};(function(){function a(r){return document.createElement(r)}var b=26,k=10;var l={a:false,x:0,y:0,suppress:false,hidden:false};var o=[];var g=["#111213","#CC0000","#4E9A06","#C4A000","#3465A4","#75507B","#06989A","#D3D7CF","#555753","#EF2929","#8AE234","#FCE94F","#729FCF","#AD7FA8","#34E2E2","#EEEEEC"];function p(){o.forEach(function(r,s){r.t=" ";r.fg=7;r.bg=0;d(r)})}function c(s,r){return o[s*b+r]}function i(){return c(l.y,l.x)}function q(r){l.hidden=!r;l.a&=r;d(i(),l.a)}function f(s,r){l.suppress=true;d(i(),false);l.x=r;l.y=s;l.suppress=false;d(i(),l.a)}function d(s,r){var v=s.e,t,u;t=r?s.bg:s.fg;u=r?s.fg:s.bg;v.innerText=(s.t+" ")[0];v.style.color=e(t);v.style.backgroundColor=e(u);v.style.fontWeight=t>7?"bold":"normal"}function h(){o.forEach(function(s,t){var r=l.a&&(t==l.y*b+l.x);d(s,r)})}function j(s){if(s.length!=b*k*3){throw"Bad data format."}for(var t=0;t<b*k;t++){var r=o[t];r.t=s[t*3];r.fg=parseInt(s[t*3+1],16);r.bg=parseInt(s[t*3+2],16)}h()}function e(r){var r=parseInt(r);if(r<0||r>15){r=0}return g[r]}function n(){var u,t=$("#screen");for(var s=0;s<b*k;s++){u=a("span");if((s>0)&&(s%b==0)){t.appendChild(a("br"))}t.appendChild(u);var r={t:" ",fg:7,bg:0,e:u};o.push(r);d(r)}setInterval(function(){l.a=!l.a;if(l.hidden){l.a=false}if(!l.suppress){d(i(),l.a)}},500)}window.Term={init:n,load:j,setCursor:f,enableCursor:q,clear:p}})();(function(){var g="ws://"+window.location.host+"/ws/update.cgi";var d;function c(i){console.log("CONNECTED")}function b(i){console.error("SOCKET CLOSED")}function f(i){console.log("Message received!",i.data)}function e(i){console.error(i.data)}function a(i){d.send(i)}function h(){d=new WebSocket(g);d.onopen=c;d.onclose=b;d.onmessage=f;d.onerror=e;console.log("Opening socket.")}window.Conn={ws:null,init:h}})();function init(){Term.init();Conn.init()};
var $=function(d,c){d=d.match(/^(\W)?(.*)/);return(c||document)["getElement"+(d[1]?d[1]=="#"?"ById":"sByClassName":"sByTagName")](d[2])};var m=function(e,d,f){d=document;f=d.createElement("p");f.innerHTML=e;e=d.createDocumentFragment();while(d=f.firstChild){e.appendChild(d)}return e};(function(){function a(r){return document.createElement(r)}var b=26,k=10;var l={a:false,x:0,y:0,suppress:false,hidden:false};var o=[];var g=["#111213","#CC0000","#4E9A06","#C4A000","#3465A4","#75507B","#06989A","#D3D7CF","#555753","#EF2929","#8AE234","#FCE94F","#729FCF","#AD7FA8","#34E2E2","#EEEEEC"];function p(){o.forEach(function(r,s){r.t=" ";r.fg=7;r.bg=0;d(r)})}function c(s,r){return o[s*b+r]}function i(){return c(l.y,l.x)}function q(r){l.hidden=!r;l.a&=r;d(i(),l.a)}function f(s,r){l.suppress=true;d(i(),false);l.x=r;l.y=s;l.suppress=false;d(i(),l.a)}function d(s,r){var v=s.e,t,u;t=r?s.bg:s.fg;u=r?s.fg:s.bg;v.innerText=(s.t+" ")[0];v.style.color=e(t);v.style.backgroundColor=e(u);v.style.fontWeight=t>7?"bold":"normal"}function h(){o.forEach(function(s,t){var r=l.a&&(t==l.y*b+l.x);d(s,r)})}function j(u){l.x=u.x;l.y=u.y;var v=0,B=0,x=u.screen;var r,w,A,z,s,y;while(v<x.length&&B<b*k){z=o[B++];r=z.fg=parseInt(x[v++],16);w=z.bg=parseInt(x[v++],16);A=z.t=x[v++];switch(x[v]){case"r":s=1;break;case"s":s=2;break;case"t":s=3;break;case"u":s=4;break;default:s=0}if(s>0){y=parseInt(x.substr(v+1,s));v=v+s+1;for(;y>0&&B<b*k;y--){z=o[B++];z.fg=r;z.bg=w;z.t=A}}}h()}function e(r){r=parseInt(r);if(r<0||r>15){r=0}return g[r]}function n(v){var u,r,t=$("#screen");for(var s=0;s<b*k;s++){u=a("span");if((s>0)&&(s%b==0)){t.appendChild(a("br"))}t.appendChild(u);r={t:" ",fg:7,bg:0,e:u};o.push(r);d(r)}setInterval(function(){l.a=!l.a;if(l.hidden){l.a=false}if(!l.suppress){d(i(),l.a)}},500);j(v)}window.Term={init:n,load:j,setCursor:f,enableCursor:q,clear:p}})();(function(){var g="ws://"+window.location.host+"/ws/update.cgi";var d;function c(i){console.log("CONNECTED")}function b(i){console.error("SOCKET CLOSED")}function f(i){try{Term.load(JSON.parse(i.data))}catch(j){console.error(j)}}function e(i){console.error(i.data)}function a(i){if(typeof i!="string"){i=JSON.stringify(i)}d.send(i)}function h(){d=new WebSocket(g);d.onopen=c;d.onclose=b;d.onmessage=f;d.onerror=e;console.log("Opening socket.")}window.Conn={ws:null,init:h,send:a}})();function init(a){Term.init(a);Conn.init()};

2
html_orig/index.html
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@ -17,4 +17,4 @@
<button>1</button><button>2</button><button>3</button><button>4</button>
</div>
<script>init()</script>
<script>init(%screenData%)</script>

73
html_orig/script.js
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@ -158,31 +158,54 @@ var m = function(
}
/** Load screen content from a 'binary' sequence */
function load(seq) {
if (seq.length != W*H*3) throw "Bad data format.";
// primitive format with 3 chars per cell: letter, fg [hex], bg [hex]
for (var i = 0; i < W * H; i++) {
var cell = screen[i];
cell.t = seq[i*3];
cell.fg = parseInt(seq[i*3+1], 16);
cell.bg = parseInt(seq[i*3+2], 16);
}
function load(obj) {
cursor.x = obj.x;
cursor.y = obj.y;
// Simple compression - hexFG hexBG 'ASCII' (r/s/t/u NUM{1,2,3,4})?
var i = 0, ci = 0, str = obj.screen;
var fg, bg, t, cell, repchars, rep;
while(i < str.length && ci<W*H) {
cell = screen[ci++];
fg = cell.fg = parseInt(str[i++], 16);
bg = cell.bg = parseInt(str[i++], 16);
t = cell.t = str[i++];
switch(str[i]) {
case 'r': repchars = 1; break;
case 's': repchars = 2; break;
case 't': repchars = 3; break;
case 'u': repchars = 4; break;
default: repchars = 0;
}
if (repchars > 0) {
rep = parseInt(str.substr(i+1,repchars));
i = i + repchars + 1;
for (; rep>0 && ci<W*H; rep--) {
cell = screen[ci++];
cell.fg = fg;
cell.bg = bg;
cell.t = t;
}
}
}
blitAll();
}
/** Parse color */
function colorHex(c) {
var c = parseInt(c);
c = parseInt(c);
if (c < 0 || c > 15) c = 0;
return CLR[c];
}
/** Init the terminal */
function init() {
function init(obj) {
/* Build screen & show */
var e, scr = $('#screen');
var e, cell, scr = $('#screen');
for(var i = 0; i < W*H; i++) {
e = make('span');
@ -193,7 +216,7 @@ var m = function(
/* The cell */
scr.appendChild(e);
var cell = {t: ' ', fg: 7, bg: 0, e: e};
cell = {t: ' ', fg: 7, bg: 0, e: e};
screen.push(cell);
blit(cell);
}
@ -209,6 +232,8 @@ var m = function(
blit(cursorCell(), cursor.a);
}
}, 500);
load(obj);
}
// publish
@ -217,7 +242,7 @@ var m = function(
load: load,
setCursor: cursorSet,
enableCursor: cursorEnable,
clear: cls,
clear: cls
};
})();
@ -237,8 +262,12 @@ var m = function(
}
function onMessage(evt) {
console.log("Message received!", evt.data);
// TODO process
try {
// Assume all our messages are screen updates
Term.load(JSON.parse(evt.data));
} catch(e) {
console.error(e);
}
}
function onError(evt) {
@ -246,13 +275,16 @@ var m = function(
}
function doSend(message) {
if (typeof message != "string") {
message = JSON.stringify(message);
}
ws.send(message);
}
function init() {
ws = new WebSocket(wsUri);
ws.onopen = onOpen;
ws.onclose = onClose
ws.onclose = onClose;
ws.onmessage = onMessage;
ws.onerror = onError;
@ -262,10 +294,11 @@ var m = function(
window.Conn = {
ws: null,
init: init,
send: doSend
};
})();
function init() {
Term.init();
function init(obj) {
Term.init(obj);
Conn.init();
}

447
user/ansi_parser.c
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/* #line 1 "user/ansi_parser.rl" */
#include <esp8266.h>
#include "screen.h"
#include "ansi_parser.h"
// Max nr of CSI parameters
#define CSI_N_MAX 3
/**
* \brief Handle fully received CSI ANSI sequence
* \param leadchar - private range leading character, 0 if none
* \param params - array of CSI_N_MAX ints holding the numeric arguments
* \param keychar - the char terminating the sequence
*/
void ICACHE_FLASH_ATTR
handle_CSI(char leadchar, int *params, char keychar)
{
/*
Implemented codes (from Wikipedia)
CSI n A CUU – Cursor Up
CSI n B CUD – Cursor Down
CSI n C CUF – Cursor Forward
CSI n D CUB – Cursor Back
CSI n E CNL – Cursor Next Line
CSI n F CPL – Cursor Previous Line
CSI n G CHA – Cursor Horizontal Absolute
CSI n ; m H CUP – Cursor Position
CSI n J ED – Erase Display
CSI n K EL – Erase in Line
CSI n S SU – Scroll Up
CSI n T SD – Scroll Down
CSI n ; m f HVP – Horizontal and Vertical Position
CSI n m SGR – Select Graphic Rendition (Implemented only some)
CSI 6n DSR – Device Status Report NOT IMPL
CSI s SCP – Save Cursor Position
CSI u RCP – Restore Cursor Position
CSI ?25l DECTCEM Hides the cursor
CSI ?25h DECTCEM Shows the cursor
*/
int n1 = params[0];
int n2 = params[1];
// int n3 = params[2];
// defaults
switch (keychar) {
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'S':
case 'T':
if (n1 == 0) n1 = 1;
break;
case 'H':
case 'f':
if (n1 == 0) n1 = 1;
if (n2 == 0) n2 = 1;
break;
case 'J':
case 'K':
if (n1 > 2) n1 = 0;
break;
}
switch (keychar) {
// CUU CUD CUF CUB
case 'A': screen_cursor_move(0, -n1); break;
case 'B': screen_cursor_move(0, n1); break;
case 'C': screen_cursor_move(n1, 0); break;
case 'D': screen_cursor_move(-n1, 0); break;
case 'E': // CNL
screen_cursor_move(0, n1);
screen_cursor_set_x(0);
break;
case 'F': // CPL
screen_cursor_move(0, -n1);
screen_cursor_set_x(0);
break;
// CHA
case 'G':
screen_cursor_set_x(n1 - 1); break; // 1-based
// SU, SD
case 'S': screen_scroll_up(n1); break;
case 'T': screen_scroll_down(n1); break;
// CUP,HVP
case 'H':
case 'f':
screen_cursor_set(n2-1, n1-1); break; // 1-based
case 'J': // ED
if (n1 == 0) {
screen_clear(CLEAR_TO_CURSOR);
} else if (n1 == 1) {
screen_clear(CLEAR_FROM_CURSOR);
} else {
screen_clear(CLEAR_ALL);
screen_cursor_set(0, 0);
}
break;
case 'K': // EL
if (n1 == 0) {
screen_clear_line(CLEAR_TO_CURSOR);
} else if (n1 == 1) {
screen_clear_line(CLEAR_FROM_CURSOR);
} else {
screen_clear_line(CLEAR_ALL);
screen_cursor_set_x(0);
}
break;
// SCP, RCP
case 's': screen_cursor_save(); break;
case 'u': screen_cursor_restore(); break;
// DECTCEM cursor show hide
case 'l':
if (leadchar == '?' && n1 == 25) {
screen_cursor_enable(1);
}
break;
case 'h':
if (leadchar == '?' && n1 == 25) {
screen_cursor_enable(0);
}
break;
case 'm': // SGR
// iterate arguments
for (int i = 0; i < CSI_N_MAX; i++) {
int n = params[i];
if (i == 0 && n == 0) { // reset SGR
screen_set_fg(7);
screen_set_bg(0);
break; // cannot combine reset with others
}
else if (n >= 30 && n <= 37) screen_set_fg(n-30); // ANSI normal fg
else if (n >= 40 && n <= 47) screen_set_bg(n-40); // ANSI normal bg
else if (n == 39) screen_set_fg(7); // default fg
else if (n == 49) screen_set_bg(0); // default bg
else if (n == 7) screen_inverse(1); // inverse
else if (n == 27) screen_inverse(0); // positive
else if (n == 1) screen_set_bright_fg(); // ANSI bold = bright fg
else if (n >= 90 && n <= 97) screen_set_fg(n-90+8); // AIX bright fg
else if (n >= 100 && n <= 107) screen_set_bg(n-100+8); // AIX bright bg
}
break;
}
}
/**
* \brief Handle a request to reset the display device
*/
void ICACHE_FLASH_ATTR
handle_RESET_cmd(void)
{
screen_reset();
}
/**
* \brief Handle a received plain character
* \param c - the character
*/
void ICACHE_FLASH_ATTR
handle_plainchar(char c)
{
screen_putchar(c);
}
/* Ragel constants block */
/* #line 188 "user/ansi_parser.c" */
static const char _ansi_actions[] = {
0, 1, 0, 1, 1, 1, 2, 1,
3, 1, 4, 1, 5, 1, 6, 1,
7, 1, 8
};
static const char _ansi_eof_actions[] = {
0, 0, 0, 13, 13, 0, 0
};
static const int ansi_start = 1;
static const int ansi_first_final = 5;
static const int ansi_error = 0;
static const int ansi_en_CSI_body = 3;
static const int ansi_en_main = 1;
/* #line 187 "user/ansi_parser.rl" */
/**
* \brief Linear ANSI chars stream parser
*
* Parses a stream of bytes using a Ragel parser. The defined
* grammar does not use 'unget', so the entire buffer is
* always processed in a linear manner.
*
* \attention -> but always check the Ragel output for 'p--'
* or 'p -=', that means trouble.
*
* \param newdata - array of new chars to process
* \param len - length of the newdata buffer
*/
void ICACHE_FLASH_ATTR
ansi_parser(const char *newdata, size_t len)
{
static int cs = -1;
// The CSI code is built here
static char csi_leading; //!< Leading char, 0 if none
static int csi_ni; //!< Number of the active digit
static int csi_n[CSI_N_MAX]; //!< Param digits
static char csi_char; //!< CSI action char (end)
if (len == 0) len = strlen(newdata);
// Load new data to Ragel vars
const char *p = newdata;
const char *eof = NULL;
const char *pe = newdata + len;
// Init Ragel on the first run
if (cs == -1) {
/* #line 244 "user/ansi_parser.c" */
{
cs = ansi_start;
}
/* #line 223 "user/ansi_parser.rl" */
}
// The parser
/* #line 254 "user/ansi_parser.c" */
{
const char *_acts;
unsigned int _nacts;
if ( p == pe )
goto _test_eof;
if ( cs == 0 )
goto _out;
_resume:
switch ( cs ) {
case 1:
if ( (*p) == 27 )
goto tr1;
goto tr0;
case 2:
switch( (*p) ) {
case 91: goto tr2;
case 93: goto tr4;
case 99: goto tr5;
}
goto tr3;
case 0:
goto _out;
case 5:
if ( (*p) == 27 )
goto tr1;
goto tr0;
case 3:
if ( (*p) == 59 )
goto tr9;
if ( (*p) < 60 ) {
if ( (*p) > 47 ) {
if ( 48 <= (*p) && (*p) <= 57 )
goto tr8;
} else if ( (*p) >= 32 )
goto tr7;
} else if ( (*p) > 64 ) {
if ( (*p) > 90 ) {
if ( 97 <= (*p) && (*p) <= 122 )
goto tr10;
} else if ( (*p) >= 65 )
goto tr10;
} else
goto tr7;
goto tr6;
case 4:
if ( (*p) == 59 )
goto tr9;
if ( (*p) < 65 ) {
if ( 48 <= (*p) && (*p) <= 57 )
goto tr8;
} else if ( (*p) > 90 ) {
if ( 97 <= (*p) && (*p) <= 122 )
goto tr10;
} else
goto tr10;
goto tr6;
case 6:
goto tr6;
}
tr3: cs = 0; goto _again;
tr6: cs = 0; goto f4;
tr0: cs = 1; goto f0;
tr1: cs = 2; goto _again;
tr7: cs = 4; goto f5;
tr8: cs = 4; goto f6;
tr9: cs = 4; goto f7;
tr2: cs = 5; goto f1;
tr4: cs = 5; goto f2;
tr5: cs = 5; goto f3;
tr10: cs = 6; goto f8;
f0: _acts = _ansi_actions + 1; goto execFuncs;
f1: _acts = _ansi_actions + 3; goto execFuncs;
f5: _acts = _ansi_actions + 5; goto execFuncs;
f6: _acts = _ansi_actions + 7; goto execFuncs;
f7: _acts = _ansi_actions + 9; goto execFuncs;
f8: _acts = _ansi_actions + 11; goto execFuncs;
f4: _acts = _ansi_actions + 13; goto execFuncs;
f2: _acts = _ansi_actions + 15; goto execFuncs;
f3: _acts = _ansi_actions + 17; goto execFuncs;
execFuncs:
_nacts = *_acts++;
while ( _nacts-- > 0 ) {
switch ( *_acts++ ) {
case 0:
/* #line 233 "user/ansi_parser.rl" */
{
handle_plainchar((*p));
}
break;
case 1:
/* #line 240 "user/ansi_parser.rl" */
{
/* Reset the CSI builder */
csi_leading = csi_char = 0;
csi_ni = 0;
/* Zero out digits */
for(int i = 0; i < CSI_N_MAX; i++) {
csi_n[i] = 0;
}
{cs = 3; goto _again;}
}
break;
case 2:
/* #line 253 "user/ansi_parser.rl" */
{
csi_leading = (*p);
}
break;
case 3:
/* #line 257 "user/ansi_parser.rl" */
{
/* x10 + digit */
if (csi_ni < CSI_N_MAX) {
csi_n[csi_ni] = csi_n[csi_ni]*10 + ((*p) - '0');
}
}
break;
case 4:
/* #line 264 "user/ansi_parser.rl" */
{
csi_ni++;
}
break;
case 5:
/* #line 268 "user/ansi_parser.rl" */
{
csi_char = (*p);
handle_CSI(csi_leading, csi_n, csi_char);
{cs = 1; goto _again;}
}
break;
case 6:
/* #line 276 "user/ansi_parser.rl" */
{
{cs = 1; goto _again;}
}
break;
case 7:
/* #line 288 "user/ansi_parser.rl" */
{
// TODO implement OS control code parsing
{cs = 1; goto _again;}
}
break;
case 8:
/* #line 293 "user/ansi_parser.rl" */
{
// Reset screen
handle_RESET_cmd();
{cs = 1; goto _again;}
}
break;
/* #line 415 "user/ansi_parser.c" */
}
}
goto _again;
_again:
if ( cs == 0 )
goto _out;
if ( ++p != pe )
goto _resume;
_test_eof: {}
if ( p == eof )
{
const char *__acts = _ansi_actions + _ansi_eof_actions[cs];
unsigned int __nacts = (unsigned int) *__acts++;
while ( __nacts-- > 0 ) {
switch ( *__acts++ ) {
case 6:
/* #line 276 "user/ansi_parser.rl" */
{
{cs = 1; goto _again;}
}
break;
/* #line 438 "user/ansi_parser.c" */
}
}
}
_out: {}
}
/* #line 311 "user/ansi_parser.rl" */
}

24
user/ansi_parser.h
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@ -0,0 +1,24 @@
#ifndef ANSI_PARSER_H
#define ANSI_PARSER_H
#include <stdlib.h>
// Max nr of CSI parameters
#define CSI_N_MAX 3
/**
* \brief Linear ANSI chars stream parser
*
* Parses a stream of bytes using a Ragel parser. The defined
* grammar does not use 'unget', so the entire buffer is
* always processed in a linear manner.
*
* \attention -> but always check the Ragel output for 'p--'
* or 'p -=', that means trouble.
*
* \param newdata - array of new chars to process
* \param len - length of the newdata buffer
*/
void ansi_parser(const char *newdata, size_t len);
#endif // ANSI_PARSER_H

312
user/ansi_parser.rl
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#include <esp8266.h>
#include "screen.h"
#include "ansi_parser.h"
// Max nr of CSI parameters
#define CSI_N_MAX 3
/**
* \brief Handle fully received CSI ANSI sequence
* \param leadchar - private range leading character, 0 if none
* \param params - array of CSI_N_MAX ints holding the numeric arguments
* \param keychar - the char terminating the sequence
*/
void ICACHE_FLASH_ATTR
handle_CSI(char leadchar, int *params, char keychar)
{
/*
Implemented codes (from Wikipedia)
CSI n A CUU – Cursor Up
CSI n B CUD – Cursor Down
CSI n C CUF – Cursor Forward
CSI n D CUB – Cursor Back
CSI n E CNL – Cursor Next Line
CSI n F CPL – Cursor Previous Line
CSI n G CHA – Cursor Horizontal Absolute
CSI n ; m H CUP – Cursor Position
CSI n J ED – Erase Display
CSI n K EL – Erase in Line
CSI n S SU – Scroll Up
CSI n T SD – Scroll Down
CSI n ; m f HVP – Horizontal and Vertical Position
CSI n m SGR – Select Graphic Rendition (Implemented only some)
CSI 6n DSR – Device Status Report NOT IMPL
CSI s SCP – Save Cursor Position
CSI u RCP – Restore Cursor Position
CSI ?25l DECTCEM Hides the cursor
CSI ?25h DECTCEM Shows the cursor
*/
int n1 = params[0];
int n2 = params[1];
// int n3 = params[2];
// defaults
switch (keychar) {
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'S':
case 'T':
if (n1 == 0) n1 = 1;
break;
case 'H':
case 'f':
if (n1 == 0) n1 = 1;
if (n2 == 0) n2 = 1;
break;
case 'J':
case 'K':
if (n1 > 2) n1 = 0;
break;
}
switch (keychar) {
// CUU CUD CUF CUB
case 'A': screen_cursor_move(0, -n1); break;
case 'B': screen_cursor_move(0, n1); break;
case 'C': screen_cursor_move(n1, 0); break;
case 'D': screen_cursor_move(-n1, 0); break;
case 'E': // CNL
screen_cursor_move(0, n1);
screen_cursor_set_x(0);
break;
case 'F': // CPL
screen_cursor_move(0, -n1);
screen_cursor_set_x(0);
break;
// CHA
case 'G':
screen_cursor_set_x(n1 - 1); break; // 1-based
// SU, SD
case 'S': screen_scroll_up(n1); break;
case 'T': screen_scroll_down(n1); break;
// CUP,HVP
case 'H':
case 'f':
screen_cursor_set(n2-1, n1-1); break; // 1-based
case 'J': // ED
if (n1 == 0) {
screen_clear(CLEAR_TO_CURSOR);
} else if (n1 == 1) {
screen_clear(CLEAR_FROM_CURSOR);
} else {
screen_clear(CLEAR_ALL);
screen_cursor_set(0, 0);
}
break;
case 'K': // EL
if (n1 == 0) {
screen_clear_line(CLEAR_TO_CURSOR);
} else if (n1 == 1) {
screen_clear_line(CLEAR_FROM_CURSOR);
} else {
screen_clear_line(CLEAR_ALL);
screen_cursor_set_x(0);
}
break;
// SCP, RCP
case 's': screen_cursor_save(); break;
case 'u': screen_cursor_restore(); break;
// DECTCEM cursor show hide
case 'l':
if (leadchar == '?' && n1 == 25) {
screen_cursor_enable(1);
}
break;
case 'h':
if (leadchar == '?' && n1 == 25) {
screen_cursor_enable(0);
}
break;
case 'm': // SGR
// iterate arguments
for (int i = 0; i < CSI_N_MAX; i++) {
int n = params[i];
if (i == 0 && n == 0) { // reset SGR
screen_set_fg(7);
screen_set_bg(0);
break; // cannot combine reset with others
}
else if (n >= 30 && n <= 37) screen_set_fg(n-30); // ANSI normal fg
else if (n >= 40 && n <= 47) screen_set_bg(n-40); // ANSI normal bg
else if (n == 39) screen_set_fg(7); // default fg
else if (n == 49) screen_set_bg(0); // default bg
else if (n == 7) screen_inverse(1); // inverse
else if (n == 27) screen_inverse(0); // positive
else if (n == 1) screen_set_bright_fg(); // ANSI bold = bright fg
else if (n >= 90 && n <= 97) screen_set_fg(n-90+8); // AIX bright fg
else if (n >= 100 && n <= 107) screen_set_bg(n-100+8); // AIX bright bg
}
break;
}
}
/**
* \brief Handle a request to reset the display device
*/
void ICACHE_FLASH_ATTR
handle_RESET_cmd(void)
{
screen_reset();
}
/**
* \brief Handle a received plain character
* \param c - the character
*/
void ICACHE_FLASH_ATTR
handle_plainchar(char c)
{
screen_putchar(c);
}
/* Ragel constants block */
%%{
machine ansi;
write data;
}%%
/**
* \brief Linear ANSI chars stream parser
*
* Parses a stream of bytes using a Ragel parser. The defined
* grammar does not use 'unget', so the entire buffer is
* always processed in a linear manner.
*
* \attention -> but always check the Ragel output for 'p--'
* or 'p -=', that means trouble.
*
* \param newdata - array of new chars to process
* \param len - length of the newdata buffer
*/
void ICACHE_FLASH_ATTR
ansi_parser(const char *newdata, size_t len)
{
static int cs = -1;
// The CSI code is built here
static char csi_leading; //!< Leading char, 0 if none
static int csi_ni; //!< Number of the active digit
static int csi_n[CSI_N_MAX]; //!< Param digits
static char csi_char; //!< CSI action char (end)
if (len == 0) len = strlen(newdata);
// Load new data to Ragel vars
const char *p = newdata;
const char *eof = NULL;
const char *pe = newdata + len;
// Init Ragel on the first run
if (cs == -1) {
%% write init;
}
// The parser
%%{
ESC = 27;
NOESC = (any - ESC);
TOK_ST = ESC '\\'; # String terminator - used for OSC commands
# --- Regular characters to be printed ---
action plain_char {
handle_plainchar(fc);
}
# --- CSI CSI commands (Select Graphic Rendition) ---
# Text color & style
action CSI_start {
/* Reset the CSI builder */
csi_leading = csi_char = 0;
csi_ni = 0;
/* Zero out digits */
for(int i = 0; i < CSI_N_MAX; i++) {
csi_n[i] = 0;
}
fgoto CSI_body;
}
action CSI_leading {
csi_leading = fc;
}
action CSI_digit {
/* x10 + digit */
if (csi_ni < CSI_N_MAX) {
csi_n[csi_ni] = csi_n[csi_ni]*10 + (fc - '0');
}
}
action CSI_semi {
csi_ni++;
}
action CSI_end {
csi_char = fc;
handle_CSI(csi_leading, csi_n, csi_char);
fgoto main;
}
action CSI_fail {
fgoto main;
}
CSI_body := ((32..47|60..64) @CSI_leading)?
((digit @CSI_digit)* ';' @CSI_semi)*
(digit @CSI_digit)* alpha @CSI_end $!CSI_fail;
# --- OSC commands (Operating System Commands) ---
# Module parametrisation
action OSC_start {
// TODO implement OS control code parsing
fgoto main;
}
action RESET_cmd {
// Reset screen
handle_RESET_cmd();
fgoto main;
}
# --- Main parser loop ---
main :=
(
(NOESC @plain_char)* ESC (
'[' @CSI_start |
']' @OSC_start |
'c' @RESET_cmd
)
)+;
write exec;
}%%
}

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user/screen.c
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#include <esp8266.h>
#include <httpd.h>
#include "screen.h"
//region Data structures
/**
* Highest permissible value of the color attribute
*/
#define COLOR_MAX 15
/**
* Screen cell data type
*/
typedef struct {
char c;
Color fg;
Color bg;
} Cell;
/**
* The screen data array
*/
static Cell screen[MAX_SCREEN_SIZE];
/**
* Cursor position and attributes
*/
static struct {
Coordinate x; //!< X coordinate
Coordinate y; //!< Y coordinate
bool visible; //!< Visible
bool inverse; //!< Inverse colors
Color fg; //!< Foreground color for writing
Color bg; //!< Background color for writing
} cursor;
/**
* Saved cursor position, used with the SCP RCP commands
*/
static struct {
Coordinate x;
Coordinate y;
} cursor_sav;
/**
* Active screen width
*/
static Coordinate W = SCREEN_DEF_W;
/**
* Active screen height
*/
static Coordinate H = SCREEN_DEF_H;
//endregion
//region Helpers
/**
* Reset a cell
*/
static inline void
cell_init(Cell *cell)
{
cell->c = ' ';
cell->fg = SCREEN_DEF_FG;
cell->bg = SCREEN_DEF_BG;
}
/**
* Clear range, inclusive
*/
static inline void
clear_range(unsigned int from, unsigned int to)
{
for (unsigned int i = from; i <= to; i++) {
cell_init(&screen[i]);
}
}
/**
* Reset the cursor position & colors
*/
static void ICACHE_FLASH_ATTR
cursor_reset(void)
{
cursor.x = 0;
cursor.y = 0;
cursor.fg = SCREEN_DEF_FG;
cursor.bg = SCREEN_DEF_BG;
cursor.visible = 1;
cursor.inverse = 0;
}
//endregion
//region Screen clearing
/**
* Init the screen (entire mappable area - for consistency)
*/
void ICACHE_FLASH_ATTR
screen_init(void)
{
for (unsigned int i = 0; i < MAX_SCREEN_SIZE; i++) {
cell_init(&screen[i]);
}
cursor_reset();
screen_notifyChange();
}
/**
* Reset the screen (only the visible area)
*/
void ICACHE_FLASH_ATTR
screen_reset(void)
{
screen_clear(CLEAR_ALL);
cursor_reset();
screen_notifyChange();
}
/**
* Clear screen area
*/
void ICACHE_FLASH_ATTR
screen_clear(ClearMode mode)
{
switch (mode) {
case CLEAR_ALL:
clear_range(0, W * H - 1);
break;
case CLEAR_FROM_CURSOR:
clear_range((cursor.y * W) + cursor.x, W * H - 1);
break;
case CLEAR_TO_CURSOR:
clear_range(0, (cursor.y * W) + cursor.x);
break;
}
screen_notifyChange();
}
/**
* Line reset to gray-on-white, empty
*/
void ICACHE_FLASH_ATTR
screen_clear_line(ClearMode mode)
{
switch (mode) {
case CLEAR_ALL:
clear_range(cursor.y * W, (cursor.y + 1) * W - 1);
break;
case CLEAR_FROM_CURSOR:
clear_range(cursor.y * W + cursor.x, (cursor.y + 1) * W - 1);
break;
case CLEAR_TO_CURSOR:
clear_range(cursor.y * W, cursor.y * W + cursor.x);
break;
}
screen_notifyChange();
}
//endregion
//region Screen manipulation
/**
* Change the screen size
*
* @param w - new width
* @param h - new height
*/
void ICACHE_FLASH_ATTR
screen_resize(Coordinate w, Coordinate h)
{
// sanitize
if (w < 1) w = 1;
if (h < 1) h = 1;
W = w;
H = h;
screen_reset();
screen_notifyChange();
}
/**
* Shift screen upwards
*/
void ICACHE_FLASH_ATTR
screen_scroll_up(unsigned int lines)
{
if (lines >= H - 1) {
screen_clear(CLEAR_ALL);
return;
}
if (lines == 0) {
return;
}
int y;
for (y = 0; y < H - lines; y++) {
memcpy(screen + y * W, screen + (y + lines) * W, W * sizeof(Cell));
}
clear_range(y * W, W * H - 1);
screen_notifyChange();
}
/**
* Shift screen downwards
*/
void ICACHE_FLASH_ATTR
screen_scroll_down(unsigned int lines)
{
if (lines >= H - 1) {
screen_clear(CLEAR_ALL);
return;
}
if (lines == 0) {
return;
}
int y;
for (y = H-1; y >= lines; y--) {
memcpy(screen + y * W, screen + (y - lines) * W, W * sizeof(Cell));
}
clear_range(0, lines * W-1);
screen_notifyChange();
}
//endregion
//region Cursor manipulation
/**
* Set cursor position
*/
void ICACHE_FLASH_ATTR
screen_cursor_set(Coordinate x, Coordinate y)
{
if (x >= W) x = W - 1;
if (y >= H) y = H - 1;
cursor.x = x;
cursor.y = y;
screen_notifyChange();
}
/**
* Set cursor X position
*/
void ICACHE_FLASH_ATTR
screen_cursor_set_x(Coordinate x)
{
if (x >= W) x = W - 1;
cursor.x = x;
screen_notifyChange();
}
/**
* Set cursor Y position
*/
void ICACHE_FLASH_ATTR
screen_cursor_set_y(Coordinate y)
{
if (y >= H) y = H - 1;
cursor.y = y;
screen_notifyChange();
}
/**
* Relative cursor move
*/
void ICACHE_FLASH_ATTR
screen_cursor_move(int dx, int dy)
{
if (dx < 0 && -dx > cursor.x) dx = -cursor.x;
if (dy < 0 && -dy > cursor.y) dy = -cursor.y;
screen_cursor_set(cursor.x + dx, cursor.y + dy);
screen_notifyChange();
}
/**
* Save the cursor pos
*/
void ICACHE_FLASH_ATTR
screen_cursor_save(void)
{
cursor_sav.x = cursor.x;
cursor_sav.y = cursor.y;
}
/**
* Restore the cursor pos
*/
void ICACHE_FLASH_ATTR
screen_cursor_restore(void)
{
cursor.x = cursor_sav.x;
cursor.y = cursor_sav.y;
screen_notifyChange();
}
/**
* Enable cursor display
*/
void ICACHE_FLASH_ATTR
screen_cursor_enable(bool enable)
{
cursor.visible = enable;
screen_notifyChange();
}
//endregion
//region Colors
/**
* Set cursor foreground color
*/
void ICACHE_FLASH_ATTR
screen_set_fg(Color color)
{
if (color > COLOR_MAX) color = COLOR_MAX;
cursor.fg = color;
}
/**
* Set cursor background coloor
*/
void ICACHE_FLASH_ATTR
screen_set_bg(Color color)
{
if (color > COLOR_MAX) color = COLOR_MAX;
cursor.bg = color;
}
/**
* Set cursor foreground and background color
*/
void ICACHE_FLASH_ATTR
screen_set_colors(Color fg, Color bg)
{
screen_set_fg(fg);
screen_set_bg(bg);
}
/**
* Invert colors
*/
void ICACHE_FLASH_ATTR
screen_inverse(bool inverse)
{
cursor.inverse = inverse;
}
/**
* Make foreground bright.
*
* This relates to the '1' SGR command which originally means
* "bold font". We interpret that as "Bright", similar to other
* terminal emulators.
*/
void ICACHE_FLASH_ATTR
screen_set_bright_fg(void)
{
cursor.fg = (cursor.fg % 8) + 8;
}
//endregion
/**
* Set a character in the cursor color, move to right with wrap.
*/
void ICACHE_FLASH_ATTR
screen_putchar(char ch)
{
Cell *c = &screen[cursor.x + cursor.y * W];
c->c = ch;
if (cursor.inverse) {
c->fg = cursor.bg;
c->bg = cursor.fg;
} else {
c->fg = cursor.fg;
c->bg = cursor.bg;
}
cursor.x++;
// X wrap
if (cursor.x >= W) {
cursor.x = 0;
cursor.y++;
// Y wrap
if (cursor.y > H-1) {
// Scroll up, so we have space for writing
screen_scroll_up(1);
cursor.y = H-1;
}
}
screen_notifyChange();
}
//region Serialization
#if 0
/**
* Debug dump
*/
void screen_dd(void)
{
for (int y = 0; y < H; y++) {
for (int x = 0; x < W; x++) {
Cell *cell = &screen[y * W + x];
// FG
printf("\033[");
if (cell->fg > 7) {
printf("%d", 90 + cell->fg - 8);
} else {
printf("%d", 30 + cell->fg);
}
printf("m");
// BG
printf("\033[");
if (cell->bg > 7) {
printf("%d", 100 + cell->bg - 8);
} else {
printf("%d", 40 + cell->bg);
}
printf("m");
printf("%c", cell->c);
}
printf("\033[0m\n");
}
}
#endif
struct ScreenSerializeState {
Color lastFg;
Color lastBg;
char lastChar;
int index;
};
/**
* Serialize the screen to a data buffer. May need multiple calls if the buffer is insufficient in size.
*
* @warning MAKE SURE *DATA IS NULL BEFORE FIRST CALL!
* Call with NULL 'buffer' at the end to free the data struct.
*
* @param buffer - buffer array of limited size. If NULL, indicates this is the last call.
* @param buf_len - buffer array size
* @param data - opaque pointer to internal data structure for storing state between repeated calls
* if NULL, indicates this is the first call.
* @return HTTPD_CGI_DONE or HTTPD_CGI_MORE. If more, repeat with the same DATA.
*/
httpd_cgi_state ICACHE_FLASH_ATTR
screenSerializeToBuffer(char *buffer, size_t buf_len, void **data)
{
struct ScreenSerializeState *ss = *data;
if (buffer == NULL) {
if (ss != NULL) free(ss);
return HTTPD_CGI_DONE;
}
Cell *cell, *cell0;
size_t remain = buf_len; int used = 0;
char *bb = buffer;
// Ideally we'd use snprintf here!
#define bufprint(fmt, ...) do { \
used = sprintf(bb, fmt, ##__VA_ARGS__); \
if(used>0) { bb += used; remain -= used; } \
} while(0)
if (ss == NULL) {
*data = ss = malloc(sizeof(struct ScreenSerializeState));
ss->index = 0;
ss->lastBg = 0;
ss->lastFg = 0;
ss->lastChar = '\0';
bufprint("{x:%d,y:%d,screen:\"", cursor.x, cursor.y);
}
int i = ss->index;
while(i < W*H && remain > 6) {
cell = cell0 = &screen[i];
// Count how many times same as previous
int repCnt = 0;
while (i < W*H
&& cell->fg == ss->lastFg
&& cell->bg == ss->lastBg
&& cell->c == ss->lastChar) {
// Repeat
repCnt++;
cell = &screen[++i];
}
if (repCnt == 0) {
if (cell0->fg == ss->lastFg && cell0->bg == ss->lastBg) {
// same colors as previous
bufprint(",%c", cell0->c);
} else {
bufprint("%X%X%c", cell0->fg, cell0->bg, cell0->c);
}
ss->lastFg = cell0->fg;
ss->lastBg = cell0->bg;
ss->lastChar = cell0->c;
i++;
} else {
char code;
if(repCnt<10) {
code = 'r';
} else if(repCnt<100) {
code = 's';
} else if(repCnt<1000) {
code = 't';
} else {
code = 'u';
}
bufprint("%c%d", code, repCnt);
}
}
ss->index = i;
if (i < W*H-1) {
return HTTPD_CGI_MORE;
}
if (remain >= 3) {
bufprint("\"}");
return HTTPD_CGI_DONE;
} else {
return HTTPD_CGI_MORE;
}
}
//endregion

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user/screen.h
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#ifndef SCREEN_H
#define SCREEN_H
#include <stdint.h>
#include <stdbool.h>
#include <esp8266.h>
#include <httpd.h>
/**
* This module handles the virtual screen and operations on it.
*
* It is interfaced by calls from the ANSI parser, and the screen
* data can be rendered for the front-end.
*
* ---
*
* Colors are 0-15, 0-7 dim, 8-15 bright.
*
* NORMAL
* 0 black, 1 red, 2 green, 3 yellow
* 4 blue, 5 mag, 6 cyan, 7 white
*
* BRIGHT
* 8 black, 9 red, 10 green, 11 yellow
* 12 blue, 13 mag, 14 cyan, 15 white
*
* Coordinates are 0-based, left-top is the origin.
* X grows to the right, Y to the bottom.
*
* +---->
* | X
* |
* V Y
*
*/
/**
* Maximum screen size (determines size of the static data array)
*
* TODO May need adjusting if there are size problems when flashing the ESP.
* We could also try to pack the Cell struct to a single 32bit word.
*/
#define MAX_SCREEN_SIZE (80*25)
#define SCREEN_DEF_W 26 //!< Default screen width
#define SCREEN_DEF_H 10 //!< Default screen height
#define SCREEN_DEF_BG 0 //!< Default screen background
#define SCREEN_DEF_FG 7 //!< Default screen foreground
typedef enum {
CLEAR_TO_CURSOR=0, CLEAR_FROM_CURSOR=1, CLEAR_ALL=2
} ClearMode;
typedef uint8_t Color;
typedef unsigned int Coordinate;
httpd_cgi_state ICACHE_FLASH_ATTR
screenSerializeToBuffer(char *buffer, size_t buf_len, void **data);
/** Init the screen */
void screen_init(void);
/** Change the screen size */
void screen_resize(Coordinate w, Coordinate h);
// --- Clearing ---
/** Screen reset to default state */
void screen_reset(void);
/** Clear entire screen, set all to 7 on 0 */
void screen_clear(ClearMode mode);
/** Line reset to gray-on-white, empty */
void screen_clear_line(ClearMode mode);
/** Shift screen upwards */
void screen_scroll_up(unsigned int lines);
/** Shift screen downwards */
void screen_scroll_down(unsigned int lines);
// --- Cursor control ---
/** Set cursor position */
void screen_cursor_set(Coordinate x, Coordinate y);
/** Set cursor X position */
void screen_cursor_set_x(Coordinate x);
/** Set cursor Y position */
void screen_cursor_set_y(Coordinate y);
/** Relative cursor move */
void screen_cursor_move(int dx, int dy);
/** Save the cursor pos */
void screen_cursor_save(void);
/** Restore the cursor pos */
void screen_cursor_restore(void);
/** Enable cursor display */
void screen_cursor_enable(bool enable);
// --- Colors ---
/** Set cursor foreground color */
void screen_set_fg(Color color);
/** Set cursor background coloor */
void screen_set_bg(Color color);
/** make foreground bright */
void screen_set_bright_fg(void);
/** Set cursor foreground and background color */
void screen_set_colors(Color fg, Color bg);
/** Invert colors */
void screen_inverse(bool inverse);
/** Set a character in the cursor color, move to right with wrap. */
void screen_putchar(char c);
#if 0
/** Debug dump */
void screen_dd(void);
#endif
extern void screen_notifyChange(void);
#endif // SCREEN_H

5
user/serial.c
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#include <esp8266.h>
#include "uart_driver.h"
#include "uart_handler.h"
#include "ansi_parser.h"
// Here the bitrates are defined
#define UART0_BAUD BIT_RATE_115200
@ -24,5 +25,7 @@ void ICACHE_FLASH_ATTR serialInit(void)
*/
void ICACHE_FLASH_ATTR UART_HandleRxByte(char c)
{
printf("'%c',", c);
// TODO buffering, do not run parser after just 1 char
printf("(%c)", c);
ansi_parser(&c, 1);
}

44
user/user_main.c
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#include <webpages-espfs.h>
#include "serial.h"
#include "io.h"
#include "screen.h"
#define FIRMWARE_VERSION "0.1"
#define SHOW_HEAP_USE 1
void screen_notifyChange() {
// TODO cooldown / buffering to reduce nr of such events
dbg("Screen notifyChange");
void myWebsocketConnect(Websock *ws) {
// NOOP
void *data = NULL;
const int bufsiz = 1024;
char buff[bufsiz];
for (int i = 0; i < 20; i++) {
httpd_cgi_state cont = screenSerializeToBuffer(buff, bufsiz, &data);
cgiWebsockBroadcast("/ws/update.cgi", buff, (int)strlen(buff), (cont == HTTPD_CGI_MORE) ? WEBSOCK_FLAG_CONT : WEBSOCK_FLAG_NONE);
if (cont == HTTPD_CGI_DONE) break;
}
}
void ICACHE_FLASH_ATTR myWebsocketConnect(Websock *ws) {
dbg("Socket connected.");
}
httpd_cgi_state ICACHE_FLASH_ATTR tplScreen(HttpdConnData *connData, char *token, void **arg) {
// cleanup
if (!connData) {
// Release data object
screenSerializeToBuffer(NULL, 0, arg);
return HTTPD_CGI_DONE;
}
const int bufsiz = 1024;
char buff[bufsiz];
if (streq(token, "screenData")) {
httpd_cgi_state cont = screenSerializeToBuffer(buff, bufsiz, arg);
httpdSend(connData, buff, -1);
return cont;
}
return HTTPD_CGI_DONE;
}
@ -51,7 +86,7 @@ CgiUploadFlashDef uploadParams={
#endif
/** Routes */
HttpdBuiltInUrl builtInUrls[]={
HttpdBuiltInUrl builtInUrls[]={ //ICACHE_RODATA_ATTR
// redirect func for the captive portal
ROUTE_CGI_ARG("*", cgiRedirectApClientToHostname, "esp8266.nonet"),
@ -59,6 +94,7 @@ HttpdBuiltInUrl builtInUrls[]={
// TODO add funcs for WiFi management (when web UI is added)
ROUTE_TPL_FILE("/", tplScreen, "index.html"),
ROUTE_FILESYSTEM(),
ROUTE_END(),
};
@ -107,6 +143,8 @@ void user_init(void) {
os_timer_arm(&prHeapTimer, 3000, 1);
#endif
screen_init();
info("System ready!");
}

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