* EspSoftwareSerial: ctor/begin() compatibility to AVR/ESP8266/ESP32 HW release 6.2.0
* Release 6.2.1: In loopback example, explicit pin settings and for ESP32, realistic max. bps for single stop bit config.
* Loopback example can exploit new invert API in HardwareSerial
* EspSoftwareSerial 6.3.0
Fixes#6811 which found an issue where connecting to scripts.google.com
would *occasionally* cause a crash. On inspection, it was found that up
to 5828 bytes of stack were used once in a while, so expand the stack to
5900 bytes to cover this case plus a little extra.
Replaces abandoned #1817 and #2694
Add optional std::function callback (so it supports lambdas and normal
functions) via ::onStart, ::onEnd, ::onProgress, and ::onError methods.
Update example with their use.
From @baruch's original pull request:
The callback is called when the upgrade actually starts rather than just
the initial query so that the user can know that it will not take longer
and can also prepare for the upgrade by shutting down other works.
From @karlp's original pull request:
Incomplete: I've not updated any documentation yet. If this style looks
good, I'll happily go and update the documentation (likewise for the
examples)
* Add const char* content to ESP8266WebSerer::send()
Supercedes #3492
Allow sending raw binary data or strings directly without conversion to
a String to reduce memory overhead when possible.
From original @timw1971 PR #3492
Added public functions to allow content to be uploaded using const
char*. For some cases, this can remove the need for content to be copied
into a String, and thus can be considerably more space-efficient.
* Fix example formatting
* Make GIF example use static const array
* Make the example really need to use const char*
Make the generated GIF dynamic in the example and move the original to
PROGMEM (since that's where const arrays like this belong).
Fixes#6792
Only append the "l" to ".htm" when there actually is a ".html" file
present. If not, fall-thru like before and try .gz through the normal
paths.
* [SSDP] add `schema(Print &) const`
Supercedes #2806
Make SSDP::schema(WiFiClient&) use a by-ref (reduce stack use)
Add a SSDP::schema(Print&)
From @Palatis' original PR:
useful when using AsyncWebServer.
* Use ip.toString, only export Print& schema interface
Because WiFiClient inherits a Print interface, replace the
::schema(WiFiClient&) with ::schema(Print&) which is source compatible
with existing code and allows the functionality requested in the initial
PR.
Use ip.toString() in the templates instead of breaking up the octets of
the address.
* Fix compile errors and backwards compatibility
Fixes#6767 . Remove the `undef F` from SysCall.h as it is not needed
nor used in the SD or SDFS libraries. This puts F() strings back in
flash when using the SD/SDFS libs.
* Backport from ESP32
* Use new library layout (.../src)
* Cleanup test case.
* C++ style cast required.
* Whitespace
* Inlining via header has better baseline ROM footprint.
* Reordered functions for better code-compare to master
* Reduces ROM footprint some more.
* Avoid unnecessary parameter passing - refactoring, same generated footprint.
* Reformat example sources
* EspSoftwareSerial release 5.3.5 with performance/error rate improvement in TX
* EspSoftwareSerial 5.3.6 with CI fix and, tadaaa, reliable tx and rx at 115200bps and beyond.
* Version 5.4.0 stabilized work of past 24h.
* define two weak functions defaulting to no-op
redefine them to do something useful when either spiffs or littlefs are used
* noop
* single entry point for closing FSes
* rename functions, override when instanciated, add link to explanation
* spiffs: call end on destructor
* Cleanup base64::encode functions
The implementation choice here using libb64 is generally good as it
is a relatively fast implementation, however the adaptation to
use PROGMEM for the translation function was a bad choice, as reading
randomly PROGMEM with byte-wide access is very very very slow.
Doing a naive if-snake is between 20% and 55% faster and uses less
flash (about 120 bytes less) and also for reasons I don't understand
8 bytes less data RAM (maybe the removal of static?).
In addition the base64::encode function was allocating for larger
input a huge amount of memory (twice the total size). we can reduce
that by doing a chunk-wise conversation to base64.
* Create authorisation base64 encoded string without newlines
Rather than first creating a string with newlines and then
stripping it away in the fast path of constructing the query,
we can call the right method and trust that the result does
not have newlines anymore.
There are actually several instances where we pass in read-only
parameters as pass-by-value, where in the case of String() that
is inefficient as it involves copy-constructor/temp string creations.
We can avoid that, similarly to single character string concatenations
done via string literals instead of char literals.
* Add time to filesystem API
Support the ESP32 File::getLastWrite() call and setting the time on
all filesystems automatically (assuming the system clock has
been set properly and time(NULL) returns the proper time!).
Adds Dir::fileTime() to get the time of a file being listed, similar to
Dir::fileName() and Dir::fileSize().
Adds ::setTimeCallback(time_t (*cb)()) to File, Dir, and FS, allowing
users to override the default timestamp on a per-file, directory, or
filesystem basis. By default, a simple callback returning time(nullptr)
is implemented.
LittleFS uses the 't' attribute and should be backwards compatible.
SD/SDFS work and include wrappers for obsolete SdFat timestamp callbacks
using the MSDOS time.
This PR does not update SPIFFS, due to compatability concerns and a
possible massive rewrite which would make it possible to determine if an
old-style ot metadata enabled FS is present at mount time.
Includes an updated SD/listfiles and LittleFS_time example.
Replaces #6315
* Add links to new mklittlefs w/timestamp support
Include the update mklittlefs which generated 't' metadata on imported
files.
../tools/sdk/lwip2/include/netif/lowpan6_opts.h
* Add explicit note about timestamp being local time
* Address review concerns
Clean up some awkward object instantiations.
Remove the _enableTime flag/setter from SPIFFS.
Clean up the FSConfig constructors using C++ style init lists.
* Status length arg in begin() added
* readable bits config
* strange line removed
* Empty constructor added
Moved custom status length init overloaded constructor
* Constructor without parameters added
* Code formatting fix
* default value in constructor removed
* default begin method forwarded to new
* Comments about bits added, else if except if
* Reduce the IRAM (and heap) usage of I2C code
The I2C code takes a large chunk of IRAM space. Attempt to reduce the
size of the routines without impacting functionality.
First, remove the `static` classifier on the sda/scl variables in the
event handlers. The first instructions in the routines overwrite the
last value stored in them, anyway, and their addresses are never taken.
* Make most variables ints, not uint8_ts
Where it doesn't make a functional difference, make global variables
ints and not unit8_t. Bytewide updates and extracts require multiple
instructions and hence increase IRAM usage as well as runtime.
* Make local flag vars int
Sketch uses 270855 bytes (25%) of program storage space. Maximum is 1044464 bytes.
Global variables use 27940 bytes (34%) of dynamic memory, leaving 53980 bytes for local variables. Maximum is 81920 bytes.
./xtensa-lx106-elf/bin/xtensa-lx106-elf-objdump -t -j .text1 /tmp/arduino_build_9615/*elf | sort -k1 | head -20
401000cc l F .text1 00000014 twi_delay
401000ec l F .text1 00000020 twi_reply$part$1
4010010c g F .text1 00000035 twi_reply
4010014c g F .text1 00000052 twi_stop
401001a0 g F .text1 0000003b twi_releaseBus
40100204 g F .text1 000001e6 twi_onTwipEvent
40100404 l F .text1 000001f7 onSdaChange
40100608 l F .text1 000002fd onSclChange
40100908 l F .text1 0000003b onTimer
* Factor out !scl in onSdaChange
If SCL is low then all branches of the case are no-ops, so factor that
portion outo to remove some redundant logic in each case.
Sketch uses 270843 bytes (25%) of program storage space. Maximum is 1044464 bytes.
Global variables use 27944 bytes (34%) of dynamic memory, leaving 53976 bytes for local variables. Maximum is 81920 bytes.
401000cc l F .text1 00000014 twi_delay
401000ec l F .text1 00000020 twi_reply$part$1
4010010c g F .text1 00000035 twi_reply
4010014c g F .text1 00000052 twi_stop
401001a0 g F .text1 0000003b twi_releaseBus
40100204 g F .text1 000001e6 twi_onTwipEvent
40100404 l F .text1 000001e7 onSdaChange
401005f8 l F .text1 000002fd onSclChange
401008f8 l F .text1 0000003b onTimer
0x0000000040107468 _text_end = ABSOLUTE (.)
* Make tiny twi_reply inline
twi_reply is a chunk of code that can be inlined and actually save IRAM
space because certain conditions acan be statically evaluated by gcc.
Sketch uses 270823 bytes (25%) of program storage space. Maximum is 1044464 bytes.
Global variables use 27944 bytes (34%) of dynamic memory, leaving 53976 bytes for local variables. Maximum is 81920 bytes.
401000cc l F .text1 00000014 twi_delay
401000f4 g F .text1 00000052 twi_stop
40100148 g F .text1 0000003b twi_releaseBus
401001b0 g F .text1 00000206 twi_onTwipEvent
401003d0 l F .text1 000001e7 onSdaChange
401005c4 l F .text1 000002fd onSclChange
401008c4 l F .text1 0000003b onTimer
40100918 g F .text1 00000085 millis
401009a0 g F .text1 0000000f micros
401009b0 g F .text1 00000022 micros64
401009d8 g F .text1 00000013 delayMicroseconds
401009f0 g F .text1 00000034 __digitalRead
401009f0 w F .text1 00000034 digitalRead
40100a3c g F .text1 000000e4 interrupt_handler
40100b20 g F .text1 0000000f vPortFree
0x0000000040107434 _text_end = ABSOLUTE (.)
* Inline additional twi_** helper functions
Sketch uses 270799 bytes (25%) of program storage space. Maximum is 1044464 bytes.
Global variables use 27944 bytes (34%) of dynamic memory, leaving 53976 bytes for local variables. Maximum is 81920 bytes.
401000cc l F .text1 00000014 twi_delay
401000f4 w F .text1 0000003b twi_releaseBus
4010015c g F .text1 00000246 twi_onTwipEvent
401003bc l F .text1 000001e7 onSdaChange
401005b0 l F .text1 000002f9 onSclChange
401008ac l F .text1 0000003b onTimer
0x000000004010741c _text_end = ABSOLUTE (.)
* Convert state machine to 1-hot for faster lookup
GCC won't use a lookup table for the TWI state machine, so it ends up
using a series of straight line compare-jump, compare-jumps to figure
out which branch of code to execute for each state. For branches that
have multiple states that call them, this can expand to a lot of code.
Short-circuit the whole thing by converting the FSM to a 1-hot encoding
while executing it, and then just and-ing the 1-hot state with the
bitmask of states with the same code.
Sketch uses 270719 bytes (25%) of program storage space. Maximum is 1044464 bytes.
Global variables use 27944 bytes (34%) of dynamic memory, leaving 53976 bytes for local variables. Maximum is 81920 bytes.
401000cc l F .text1 00000014 twi_delay
401000f4 w F .text1 0000003b twi_releaseBus
4010015c g F .text1 00000246 twi_onTwipEvent
401003c0 l F .text1 000001b1 onSdaChange
40100580 l F .text1 000002da onSclChange
4010085c l F .text1 0000003b onTimer
0x00000000401073cc _text_end = ABSOLUTE (.)
Saves 228 bytes of IRAM vs. master, uses 32 additional bytes of heap.
* Factor out twi_status setting
twi_status is set immediately before an event handler is called,
resulting in lots of duplicated code. Set the twi_status flag inside
the handler itself.
Saves an add'l ~100 bytes of IRAM from prior changes, for a total of
~340 bytes.
earle@server:~/Arduino/hardware/esp8266com/esp8266/tools$ ./xtensa-lx106-elf/bin/xtensa-lx106-elf-objdump -t -j .text1 /tmp/arduino_build_849115/*elf | sort -k1 | head -20
401000cc l F .text1 00000014 twi_delay
401000f4 w F .text1 0000003b twi_releaseBus
40100160 g F .text1 0000024e twi_onTwipEvent
401003c8 l F .text1 00000181 onSdaChange
40100558 l F .text1 00000297 onSclChange
* Use a struct to hold globals for TWI
Thanks to the suggestion from @mhightower83, move all global objects
into a struct. This lets a single base pointer register to be used in
place of constantly reloading the address of each individual variable.
This might be better expressed by moving this to a real C++
implementaion based on a class object (the twi.xxxx would go back to the
old xxx-only naming for vars), but there would then need to be API
wrappers since the functionality is exposed through a plain C API.
Saves 168 additional code bytes, for a grand total of 550 bytes IRAM.
earle@server:~/Arduino/hardware/esp8266com/esp8266/tools$ ./xtensa-lx106-elf/bin/xtensa-lx106-elf-objdump -t -j .text1 /tmp/arduino_build_849115/*elf | sort -k1 | head -20
401000cc l F .text1 00000014 twi_delay
401000e8 w F .text1 00000032 twi_releaseBus
40100128 g F .text1 00000217 twi_onTwipEvent
4010034c l F .text1 00000149 onSdaChange
4010049c l F .text1 00000267 onSclChange
40100704 l F .text1 00000028 onTimer
* Use enums for states, move one more var to twi struct
Make the TWI states enums and not #defines, in the hope that it will
allow GCC to more easily flag problems and general good code
organization.
401000cc l F .text1 00000014 twi_delay
401000e8 w F .text1 00000032 twi_releaseBus
40100128 g F .text1 00000217 twi_onTwipEvent
4010034c l F .text1 00000149 onSdaChange
4010049c l F .text1 00000257 onSclChange
401006f4 l F .text1 00000028 onTimer
Looks like another 16 bytes IRAM saved from the prior push.
Sketch uses 267079 bytes (25%) of program storage space. Maximum is 1044464 bytes.
Global variables use 27696 bytes (33%) of dynamic memory, leaving 54224 bytes for local variables. Maximum is 81920 bytes.
* Save 4 heap bytes by reprdering struct
* Convert to C++ class, clean up code
Convert the entire file into a C++ class (with C wrappers to preserve
the ABI). This allows for setting individual values of the global
struct(class) in-situ instead of a cryptic list at the end of the struct
definition. It also removes a lot of redundant `twi.`s from most class
members.
Clean up the code by converting from `#defines` to inline functions, get
rid of ternarys-as-ifs, use real enums, etc.
For slave_receiver.ino, the numbers are:
GIT Master IRAM: 0x723c
This push IRAM: 0x6fc0
For a savings of 636 total IRAM bytes (note, there may be a slight flash
text increase, but we have 1MB of flash to work with and only 32K of IRAM
so the tradeoff makes sense.
* Run astyle core.conf, clean up space/tab/etc.
Since the C++ version has significant text differences anyway, now is a
good time to clean up the mess of spaces, tabs, and differing cuddles.
* Add enum use comment, rename twi::delay, fix SDA/SCL_READ bool usage
Per review comments
* Replace clock stretch repeated code w/inline loop
There were multiple places where the code was waiting for a slave to
finish stretching the clock. Factor them out to an *inline* function
to reduce code smell.
* Remove slave code when not using slave mode
Add a new twi_setSlaveMode call which actually attached the interrupts
to the slave pin change code onSdaChenge/onSclChange. Don't attach
interrupts in the main twi_begin.
Because slave mode is only useful should a onoReceive or onRequest
callback, call twi_setSlaveMode and attach interrupts on the Wire
setters.
This allows GCC to not link in slave code unless slave mode is used,
saving over 1,000 bytes of IRAM in the common, master-only case.
This change expands the NTP-TZ-DST example to list the active
SNTP servers. It lists the IP address server name (if used) and
reachability in ntpq style octal format.
Tests:
- Build against all LwIP stack configurations and correct
operation with a single SNTP server
- Vary connectivity to an SNTP server and check reachability
updates
- Configure 3 SNTP servers by name
- With a patched LwIP stack that supports simultaneous DHCP
and DHCPv6 SNTP servers check that all server details are
listed and update correctly during operation
This removes definitions relating to the built-in SNTP client that
are LwIP v1 specific. Instead of duplicating these pull in the
LwIP header that correspond to the required functions depending on
the version of the stack being used.
Without this fix calls to sntp_getserver() work but return invalid
data and can lead to stack exhaustion.
Update the NTP-TZ-DST example to use the Arduino sntp.h header
rather than duplicate the conditional checks to use the LwIP header.
Tests:
- Build against a simple SNTP API demonstratin app and all
LwIP configurations. Verify that the app runs for an extended
period and that the expected results are obtained.
* use a scheduled function for settimeofday_cb
* per review
* use a generic and clear name for trivial functional variable type name used for callbacks
use InterruptLock class for scoped interrupts instead of blindly disabling/enabling interrupts, which doesn't support nesting nor restore previous state.
Add forgotten include
Remove locks, simplify code
Fix typo
Drop needless include
* Put longer string literals into PROGMEM
* Use Flash Strings for Debug output
This is hopefully very infrequently used, so it shouldn't
be in main memory.
* Align to latest EspSoftwareSerial release - nothing ESP8266 specific, but drifting versions otherwise makes life hard for users.
* ghostl array compatibility: aggregate initialization, no implicit cast to T*.
