paulstoffregen / altsoftserial Goto Github PK

Software emulated serial using hardware timers for improved compatibility

Home Page: http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html

C++ 81.05% C 18.95%

altsoftserial's Introduction

AltSoftSerial Library

Improved software emulated serial, using hardware timers for precise signal timing and availability of CPU time for other libraries to respond to interrupts during data AltSoftSerial data transmission and reception.

http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html

If you need very low baud rates, check out SlowSoftSerial by Paul Williamson.

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altsoftserial's Issues

Add Support for ATMEGA328PB Please

Description

Describe your problem.

Does not appear to have support for ATMEGA328PB.

Steps To Reproduce Problem

Please give detailed instructions needed for anyone to attempt to reproduce the problem.

Just try compiling for ATMEGA328PB

Hardware & Software

ATMEGA328PB

Errors or Incorrect Output

Error while detecting libraries included by C:\Users\maeso\Documents\Arduino\libraries\AltSoftSerial\AltSoftSerial.cpp

Sending two inverting TX signals on two digital outputs at the same time

Hi, please is possible to use AltSoftSerial for sending TX+ and TX- signal on two Arduino digital outputs at the same time ? The same serial data, but inverted logical level on second digital output, so it wouldn't necessary to use any hardware invertor for it.

incompatible with esp8266 architecture(s).

Hi,
I used arduino IDE to code esp8266. (https://github.com/esp8266/Arduino)
when I wrote:


#include 
AltSoftSerial myserial(0,2)

I couldn't pass the compiler, and got following error msgs:
WARNING: library AltSoftSerial claims to run on [avr] architecture(s) and may be incompatible with your current board which runs on [esp8266] architecture(s).

It would be helpful if you can provide the compatibility for esp8266, because esp8266 has only one UART and the softwareserial such on communicating with RS232.

Thanks in advance.

Lucas

peek seems not working

It looks like the following code is working for me.

int AltSoftSerial::peek(void)
{
uint8_t head, tail;

head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (tail + 1 < RX_BUFFER_SIZE)
    return rx_buffer[tail+1];
else
    return rx_buffer[0];

}

Support for Teensy 4.0

Description

I am unable to compile any sketches that include <AltSoftSerial.h> against the Teensy 4.0 items I've purchased.

Steps To Reproduce Problem

I am using Arduino IDE 1.8.10 and the latest Teensy Loader 1.48. I can compile sketches (but not upload) for all the Teensy boards under the IDE Tools\Board:\Boards Manager up through Teensy 3.6. In looking at the AltSoftSerial-master\config\AlstSoftSerial_Boards.h, Teensy 2.0, Teensy++2.0 and Teensy 3.x are listed (and other makes of boards), but nothing specifically w.r.t. a Teensy 4.0.

Hardware & Software

Board Teensy 4.0
Shields / modules used None
Arduino IDE version 1.8.10
Teensyduino version (if using Teensy) 1.48
Version info & package name (from Tools > Boards > Board Manager) Teensy 2.0 through Teensy 4.0
Operating system & version Windows 10 Pro
Any other software or hardware? None yet

NOTE: I do have alternative AltSoftSerial installs, but they are all the current 1.4 version.

Arduino Sketch

Verbatim: ---
#include <AltSoftSerial.h>

AltSoftSerial altSerial;

void setup() {
Serial.begin(9600);
Serial.println("AltSoftSerial Test Begin");
altSerial.begin(9600);
altSerial.println("Hello World");
}

void loop() {
char c;

if (Serial.available()) {
c = Serial.read();
altSerial.print(c);
}
if (altSerial.available()) {
c = altSerial.read();
Serial.print(c);
}
}

Errors or Incorrect Output

Arduino: 1.8.10 (Windows 10), TD: 1.48, Board: "Teensy 4.0, Serial, 600 MHz, Faster, US English"

C:\Program Files (x86)\Arduino_1_8_10\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino_1_8_10\hardware -hardware C:\Users\glsw0\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino_1_8_10\tools-builder -tools C:\Program Files (x86)\Arduino_1_8_10\hardware\tools\avr -tools C:\Users\glsw0\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino_1_8_10\libraries -libraries C:\Users\glsw0\OneDrive\Documents\Arduino\libraries -fqbn=teensy:avr:teensy40:usb=serial,speed=600,opt=o2std,keys=en-us -ide-version=10810 -build-path C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522 -warnings=default -build-cache C:\Users\glsw0\AppData\Local\Temp\arduino_cache_74529 -verbose C:\Users\glsw0\OneDrive\Documents\Teensy\sketch_nov09a\sketch_nov09a.ino
C:\Program Files (x86)\Arduino_1_8_10\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino_1_8_10\hardware -hardware C:\Users\glsw0\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino_1_8_10\tools-builder -tools C:\Program Files (x86)\Arduino_1_8_10\hardware\tools\avr -tools C:\Users\glsw0\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino_1_8_10\libraries -libraries C:\Users\glsw0\OneDrive\Documents\Arduino\libraries -fqbn=teensy:avr:teensy40:usb=serial,speed=600,opt=o2std,keys=en-us -ide-version=10810 -build-path C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522 -warnings=default -build-cache C:\Users\glsw0\AppData\Local\Temp\arduino_cache_74529 -verbose C:\Users\glsw0\OneDrive\Documents\Teensy\sketch_nov09a\sketch_nov09a.ino
Using board 'teensy40' from platform in folder: C:\Program
Using core 'teensy4' from platform in folder: C:\Program
Detecting libraries used...
"C:\Program Files (x86)\Arduino_1_8_10\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w -g -Wall -ffunction-sections -fdata-sections -nostdlib -std=gnu++14 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -D__IMXRT1062__ -DTEENSYDUINO=148 -DARDUINO=10810 -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino_1_8_10\hardware\teensy\avr\cores\teensy4" "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522\sketch\sketch_nov09a.ino.cpp" -o nul
Alternatives for AltSoftSerial.h: [[email protected]]
ResolveLibrary(AltSoftSerial.h)
-> candidates: [[email protected]]
"C:\Program Files (x86)\Arduino_1_8_10\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w -g -Wall -ffunction-sections -fdata-sections -nostdlib -std=gnu++14 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -D__IMXRT1062__ -DTEENSYDUINO=148 -DARDUINO=10810 -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino_1_8_10\hardware\teensy\avr\cores\teensy4" "-IC:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial" "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522\sketch\sketch_nov09a.ino.cpp" -o nul
"C:\Program Files (x86)\Arduino_1_8_10\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w -g -Wall -ffunction-sections -fdata-sections -nostdlib -std=gnu++14 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -D__IMXRT1062__ -DTEENSYDUINO=148 -DARDUINO=10810 -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino_1_8_10\hardware\teensy\avr\cores\teensy4" "-IC:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial" "C:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial\AltSoftSerial.cpp" -o nul
Error while detecting libraries included by C:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial\AltSoftSerial.cpp
Generating function prototypes...
"C:\Program Files (x86)\Arduino_1_8_10\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -E -CC -x c++ -w -g -Wall -ffunction-sections -fdata-sections -nostdlib -std=gnu++14 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -D__IMXRT1062__ -DTEENSYDUINO=148 -DARDUINO=10810 -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino_1_8_10\hardware\teensy\avr\cores\teensy4" "-IC:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial" "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522\sketch\sketch_nov09a.ino.cpp" -o "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522\preproc\ctags_target_for_gcc_minus_e.cpp"
"C:\Program Files (x86)\Arduino_1_8_10\tools-builder\ctags\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522\preproc\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\Program Files (x86)\Arduino_1_8_10\hardware\teensy/../tools/precompile_helper" "C:\Program Files (x86)\Arduino_1_8_10\hardware\teensy\avr/cores/teensy4" "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522" "C:\Program Files (x86)\Arduino_1_8_10\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -x c++-header -O2 -g -Wall -ffunction-sections -fdata-sections -nostdlib -MMD -std=gnu++14 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -D__IMXRT1062__ -DTEENSYDUINO=148 -DARDUINO=10810 -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Program Files (x86)\Arduino_1_8_10\hardware\teensy\avr/cores/teensy4" "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522/pch/Arduino.h" -o "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522/pch/Arduino.h.gch"
"C:\Program Files (x86)\Arduino_1_8_10\hardware\teensy/../tools/arm/bin/arm-none-eabi-g++" -c -O2 -g -Wall -ffunction-sections -fdata-sections -nostdlib -MMD -std=gnu++14 -fno-exceptions -fpermissive -fno-rtti -fno-threadsafe-statics -felide-constructors -Wno-error=narrowing -mthumb -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -D__IMXRT1062__ -DTEENSYDUINO=148 -DARDUINO=10810 -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH "-IC:\Users\glsw0\AppData\Local\Temp\arduino_build_872522/pch" "-IC:\Program Files (x86)\Arduino_1_8_10\hardware\teensy\avr\cores\teensy4" "-IC:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial" "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522\sketch\sketch_nov09a.ino.cpp" -o "C:\Users\glsw0\AppData\Local\Temp\arduino_build_872522\sketch\sketch_nov09a.ino.cpp.o"
In file included from C:\Users\glsw0\OneDrive\Documents\Teensy\sketch_nov09a\sketch_nov09a.ino:1:0:

C:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial/AltSoftSerial.h: In static member function 'static void AltSoftSerial::begin(uint32_t)':

C:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial/AltSoftSerial.h:37:25: error: 'F_BUS' was not declared in this scope

#define ALTSS_BASE_FREQ F_BUS

C:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial/AltSoftSerial.h:47:43: note: in expansion of macro 'ALTSS_BASE_FREQ'

static void begin(uint32_t baud) { init((ALTSS_BASE_FREQ + baud / 2) / baud); }

Multiple libraries were found for "AltSoftSerial.h"
Used: C:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial
Using library AltSoftSerial at version 1.4 in folder: C:\Users\glsw0\OneDrive\Documents\Arduino\libraries\AltSoftSerial
Error compiling for board Teensy 4.0.

Regards.

Issue with Teensy 3.2 and AltSoft at 9K6 speed

Hi there,

I have a problem which I cannot solve here: I use AltSoft for receiving bytes form a 9K6 serial keyboard interface on a Teensy 3.2. It works well for values between 0 and 126. As soon as the sent byte value increases to 127 the Teensy 3.2 recognises numbers in random values. As soon as I receive bytes smaller than 127 it takes 2-3 bytes to get the right output again.

The code works pretty well if I use Serial3 hardware interface. But I need all 3 hardware interfaces for MIDI and another 9K6 RS 232 interface so a fourth interface is needed. Maybe the Teensy is damaged?!?

Here is the code:

include <AltSoftSerial.h>

AltSoftSerial keyin;
byte keyinData = 0;

void setup()
{
keyin.begin (9600); // Keyboard Console Serial Receive (Pin 20)
Serial.begin(9600);
}

void loop()
{
if (keyin.available()>0)
{
keyinData = keyin.read();
Serial.println(keyinData);
}
}

Is there something I do wrong? Thank you for brining light into my darkness :.-)

Cheers,
Alexander

Lost answers UART

Description

sometimes the answers are lost uart. Module sim800L
AT+CLCC=1 (enable status call, 3 statuses: 1,0,2 1,0,0 1,0,6)

Steps To Reproduce Problem

repeat the operation several times

Hardware & Software

Board Arduino UNO
modules used SIM800L
Arduino IDE version 1.8.5
Operating system & version windows 7 x64

Arduino Sketch

#include <AltSoftSerial.h>

AltSoftSerial altSerial;
char c;
  
String resp="";

void setup() {
  Serial.begin(9600);
  //Serial.println("AltSoftSerial Test Begin");
  altSerial.begin(9600);
//  altSerial.println("at+cpowd=1");
//  delay(10000); 
  altSerial.println("at");
 // altSerial.println("atdxxxxxxxxxx;");
}
void loop() {
  if (altSerial.available()) {
    c = altSerial.read();
    Serial.print(c);   
  }
  
  if (Serial.available()) {
    c = Serial.read();
    altSerial.print(c);
    Serial.print(resp);
  }
 
 
}

Errors or Incorrect Output

at <----- manual input
OK <----normal answer
atdXXXXXXXXXX; <----- manual input
OK <----normal answer

+CLCC: 1,0,2,0,0,"XXXXXXXXXX",129,"" <----normal answer
atdXXXXXXXXXX; <----- bad answer \0 (end line) and print next command, manual input
OK <----normal answer