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UNTESTED Reduce #ifdef hell on wifi

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This fix to the structure of the Wifi code alows for a better link optimisation and so it is no longer necessary for the wifi code or header to read values from the config.h file.

Compilation shows that >11Kb of code is eliminated by the linker if the setup and loop are not called.
~including the interface does not really change anything
This commit is contained in:
Asbelos 2020-09-26 09:40:49 +01:00
parent 411a6b1130
commit 162c7e6e11
2 changed files with 17 additions and 24 deletions
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34
WifiInterface.cpp
View File

@ -19,7 +19,6 @@
*/ */
#include "WifiInterface.h" /* config.h and defines.h included here */ #include "WifiInterface.h" /* config.h and defines.h included here */
#ifdef WIFI_ON /* from config.h and defines.h */
#include <avr/pgmspace.h> #include <avr/pgmspace.h>
#include "DIAG.h" #include "DIAG.h"
#include "StringFormatter.h" #include "StringFormatter.h"
@ -41,7 +40,7 @@ unsigned long WifiInterface::loopTimeoutStart = 0;
int WifiInterface::datalength = 0; int WifiInterface::datalength = 0;
int WifiInterface::connectionId; int WifiInterface::connectionId;
byte WifiInterface::buffer[MAX_WIFI_BUFFER+1]; byte WifiInterface::buffer[MAX_WIFI_BUFFER+1];
MemStream WifiInterface::streamer(buffer, MAX_WIFI_BUFFER); MemStream * WifiInterface::streamer;
Stream * WifiInterface::wifiStream = NULL; Stream * WifiInterface::wifiStream = NULL;
HTTP_CALLBACK WifiInterface::httpCallback = 0; HTTP_CALLBACK WifiInterface::httpCallback = 0;
@ -60,7 +59,7 @@ bool WifiInterface::setup(Stream & setupStream, const __FlashStringHelper* SSid
StringFormatter::send(wifiStream, F("ATE0\r\n")); // turn off the echo StringFormatter::send(wifiStream, F("ATE0\r\n")); // turn off the echo
checkForOK(200, OK_SEARCH, true); checkForOK(200, OK_SEARCH, true);
} }
streamer=new MemStream(buffer, MAX_WIFI_BUFFER);
DIAG(F("\n++ Wifi Setup %S ++\n"), connected ? F("OK") : F("FAILED")); DIAG(F("\n++ Wifi Setup %S ++\n"), connected ? F("OK") : F("FAILED"));
return connected; return connected;
} }
@ -300,15 +299,15 @@ void WifiInterface::loop() {
case 6: // reading for length case 6: // reading for length
if (ch == ':') loopstate = (datalength == 0) ? 99 : 7; // 99 is getout without reading next char if (ch == ':') loopstate = (datalength == 0) ? 99 : 7; // 99 is getout without reading next char
else datalength = datalength * 10 + (ch - '0'); else datalength = datalength * 10 + (ch - '0');
streamer.flush(); // basically sets write point at start of buffer streamer->flush(); // basically sets write point at start of buffer
break; break;
case 7: // reading data case 7: // reading data
streamer.write(ch); // NOTE: The MemStream will throw away bytes that do not fit in the buffer. streamer->write(ch); // NOTE: The MemStream will throw away bytes that do not fit in the buffer.
// This protects against buffer overflows even with things as innocent // This protects against buffer overflows even with things as innocent
// as a browser which send massive, irrlevent HTTP headers. // as a browser which send massive, irrlevent HTTP headers.
datalength--; datalength--;
if (datalength == 0) { if (datalength == 0) {
buffer[streamer.available()]='\0'; // mark end of buffer, so it can be used as a string later buffer[streamer->available()]='\0'; // mark end of buffer, so it can be used as a string later
loopstate = 99; loopstate = 99;
} }
break; break;
@ -351,8 +350,8 @@ void WifiInterface::loop() {
loopstate = 1; loopstate = 1;
} }
if (ch == 'K') { // assume its in SEND OK if (ch == 'K') { // assume its in SEND OK
if (Diag::WIFI) DIAG(F("\n\n Wifi BUSY RETRYING.. AT+CIPSEND=%d,%d\r\n"), connectionId, streamer.available()); if (Diag::WIFI) DIAG(F("\n\n Wifi BUSY RETRYING.. AT+CIPSEND=%d,%d\r\n"), connectionId, streamer->available());
StringFormatter::send(wifiStream, F("AT+CIPSEND=%d,%d\r\n"), connectionId, streamer.available()); StringFormatter::send(wifiStream, F("AT+CIPSEND=%d,%d\r\n"), connectionId, streamer->available());
loopTimeoutStart = millis(); loopTimeoutStart = millis();
loopstate = 10; // non-blocking loop waits for > before sending loopstate = 10; // non-blocking loop waits for > before sending
break; break;
@ -365,7 +364,7 @@ void WifiInterface::loop() {
// AT this point we have read an incoming message into the buffer // AT this point we have read an incoming message into the buffer
if (Diag::WIFI) DIAG(F("\n%l Wifi(%d)<-[%e]\n"), millis(),connectionId, buffer); if (Diag::WIFI) DIAG(F("\n%l Wifi(%d)<-[%e]\n"), millis(),connectionId, buffer);
streamer.setBufferContentPosition(0, 0); // reset write position to start of buffer streamer->setBufferContentPosition(0, 0); // reset write position to start of buffer
// SIDE EFFECT WARNING::: // SIDE EFFECT WARNING:::
// We know that parser will read the entire buffer before starting to write to it. // We know that parser will read the entire buffer before starting to write to it.
// Otherwise we would have to copy the buffer elsewhere and RAM is in short supply. // Otherwise we would have to copy the buffer elsewhere and RAM is in short supply.
@ -374,18 +373,18 @@ void WifiInterface::loop() {
// Intercept HTTP requests // Intercept HTTP requests
if (isHTTP()) { if (isHTTP()) {
if (httpCallback) httpCallback(&streamer, buffer); if (httpCallback) httpCallback(streamer, buffer);
else { else {
StringFormatter::send(streamer, F("HTTP/1.1 404 Not Found\nContent-Type: text/html\nConnnection: close\n\n")); StringFormatter::send(streamer, F("HTTP/1.1 404 Not Found\nContent-Type: text/html\nConnnection: close\n\n"));
StringFormatter::send(streamer, F("<html><body>This is <b>not</b> a web server.<br/></body></html>")); StringFormatter::send(streamer, F("<html><body>This is <b>not</b> a web server.<br/></body></html>"));
} }
closeAfter = true; closeAfter = true;
} }
else if (buffer[0] == '<') parser.parse(&streamer, buffer, true); // tell JMRI parser that ACKS are blocking because we can't handle the async else if (buffer[0] == '<') parser.parse(streamer, buffer, true); // tell JMRI parser that ACKS are blocking because we can't handle the async
else WiThrottle::getThrottle(connectionId)->parse(streamer, buffer); else WiThrottle::getThrottle(connectionId)->parse(*streamer, buffer);
if (streamer.available() == 0) { if (streamer->available() == 0) {
// No reply // No reply
if (closeAfter) { if (closeAfter) {
if (Diag::WIFI) DIAG(F("AT+CIPCLOSE=%d\r\n"), connectionId); if (Diag::WIFI) DIAG(F("AT+CIPCLOSE=%d\r\n"), connectionId);
@ -395,11 +394,10 @@ void WifiInterface::loop() {
return; return;
} }
// prepare to send reply // prepare to send reply
buffer[streamer.available()]='\0'; // mark end of buffer, so it can be used as a string later buffer[streamer->available()]='\0'; // mark end of buffer, so it can be used as a string later
if (Diag::WIFI) DIAG(F("%l WiFi(%d)->[%e] l(%d)\n"), millis(), connectionId, buffer, streamer.available()); if (Diag::WIFI) DIAG(F("%l WiFi(%d)->[%e] l(%d)\n"), millis(), connectionId, buffer, streamer->available());
if (Diag::WIFI) DIAG(F("AT+CIPSEND=%d,%d\r\n"), connectionId, streamer.available()); if (Diag::WIFI) DIAG(F("AT+CIPSEND=%d,%d\r\n"), connectionId, streamer->available());
StringFormatter::send(wifiStream, F("AT+CIPSEND=%d,%d\r\n"), connectionId, streamer.available()); StringFormatter::send(wifiStream, F("AT+CIPSEND=%d,%d\r\n"), connectionId, streamer->available());
loopTimeoutStart = millis(); loopTimeoutStart = millis();
loopstate = 10; // non-blocking loop waits for > before sending loopstate = 10; // non-blocking loop waits for > before sending
} }
#endif // WIFI_ON

7
WifiInterface.h
View File

@ -19,12 +19,8 @@
*/ */
#ifndef WifiInterface_h #ifndef WifiInterface_h
#define WifiInterface_h #define WifiInterface_h
#include "config.h"
#include "defines.h"
#ifdef WIFI_ON
#include "DCCEXParser.h" #include "DCCEXParser.h"
#include "MemStream.h" #include "MemStream.h"
#include <Arduino.h> #include <Arduino.h>
#include <avr/pgmspace.h> #include <avr/pgmspace.h>
@ -56,7 +52,6 @@ private:
static unsigned long loopTimeoutStart; static unsigned long loopTimeoutStart;
static const byte MAX_WIFI_BUFFER = 250; static const byte MAX_WIFI_BUFFER = 250;
static byte buffer[MAX_WIFI_BUFFER + 1]; static byte buffer[MAX_WIFI_BUFFER + 1];
static MemStream streamer; static MemStream * streamer;
}; };
#endif // WIFI_ON
#endif #endif