Available as Arduino library "ATtinySerialOut"
Version 2.0.1 - work in progress
Minimal bit-bang send serial
115200 baud for 1/8/16 MHz ATtiny clock.
From this version, ATtinySerialOut.cpp is renamed to ATtinySerialOut.hpp. You should include it once in your main program (.ino file) like done in the examples. I you accidently included it more than once, you will see errors like this:
(.text+0x0): multiple definition of `initTXPin()'
.\ShowInfo.cpp.o (symbol from plugin):(.text+0x0): first defined here
To fix the error, you must rename the include directive in the file mentioned in the error (here: ShowInfo.cpp) from #include "ATtinySerialOut.hpp" to #include "ATtinySerialOut.h".
To customize the library to different requrements, there are some compile options / macros available.
These macros must be defined in your program before the line #include <TinySerialOut.hpp> to take effect.
Modify them by enabling / disabling them, or change the values if applicable.
| Macro | Default | File | Description |
|---|---|---|---|
TX_PIN |
PB2 (PA1 for ATtiny87/167) | Before #include <TinySerialOut.hpp> |
The pin to use for transmitting bit bang serial. |
USE_PORTB_FOR_TX_PIN |
disabled | Before #include <TinySerialOut.hpp> |
If defined, port B is used for TX pin for ATtiny87/167. |
TINY_SERIAL_DO_NOT_USE_115200BAUD |
disabled | Before #include <TinySerialOut.hpp> |
To force using other baud rates. The rates are 38400 baud at 1 MHz (which has smaller code size) or 230400 baud at 8/16 MHz. |
TINY_SERIAL_INHERIT_FROM_PRINT |
disabled | Before #include <TinySerialOut.hpp> |
If defined, you can use this class as a replacement for standard Serial as a print class e.g. for functions like void prinInfo(Print *aSerial). Increases program size. |
First, use Sketch > Show Sketch Folder (Ctrl+K).
If you have not yet saved the example as your own sketch, then you are instantly in the right library folder.
Otherwise you have to navigate to the parallel libraries folder and select the library you want to access.
In both cases the library source and include files are located in the libraries src directory.
The modification must be renewed for each new library version!
If you are using PlatformIO, you can define the macros in the platformio.ini file with build_flags = -D MACRO_NAME or build_flags = -D MACRO_NAME=macroValue.
If you are using Sloeber as your IDE, you can easily define global symbols with Properties > Arduino > CompileOptions.
void print(const __FlashStringHelper *aStringPtr);
void print(const char *aStringPtr);
void print(char aChar);
void print(uint8_t aByte, uint8_t aBase = 10);
void print(int16_t, uint8_t aBase = 10);
void print(uint16_t aInteger, uint8_t aBase = 10);
void print(uint32_t aLong, uint8_t aBase = 10);
void print(uint32_t aLong, uint8_t aBase = 10);
void print(double aFloat, uint8_t aDigits = 2);
void printHex(uint8_t aByte); // with 0x prefix
void println(const __FlashStringHelper *aStringPtr);
void println(char aChar);
void println(uint8_t aByte, uint8_t aBase = 10);
void println(int16_t aInteger, uint8_t aBase = 10);
void println(uint16_t aInteger, uint8_t aBase = 10);
void println(int32_t aLong, uint8_t aBase = 10);
void println(uint32_t aLong, uint8_t aBase = 10);
void println(double aFloat, uint8_t aDigits = 2);
void println(void);Please use the new Digistump core. Since version 1.2.0, the library is no longer compatible with the old cores supplied by digistump.
This example issues an alarm if the chip sensor detect a falling teperarure and is fully documented here
- Added
USE_PORTB_FOR_TX_PINto allow TX pin on port B for ATtiny87/167.
- Renamed ATtinySerialOut.cpp to ATtinySerialOut.hpp => TX pin can be defined in main program.
- Added symbol
TINY_SERIAL_INHERIT_FROM_PRINT- if defined, you can use this class as a replacement for standard Serial as a print class.
- Cloned ATtinySerialOut.cpp as ATtinySerialOut.hpp for direct include.
- Added ATtiny88 support.
- Added ATtinyX4 support.
- Removed workaround
#define __FlashStringHelper fstr_tfor old Digispark core < 1.6.8 in order to work with core >= 1.7.0. - Added ATtiny167 support.
- Moved functions from h to cpp file.
- Removed symbol
TINY_SERIAL_INHERIT_FROM_PRINTand replaced by macro#define Print TinySerialOut - Changed
inttoint16_tandlongtoint32_t. - Use
utoa()andultoa()foruint16_tanduint32_t.
- Added function
writeCRLF()
- Symbol TINY_SERIAL_INHERIT_FROM_PRINT - if defined, you can use this class as a replacement for standard Serial as a print class.
- Improved all ...Hex() functions.
- Define FlashStringHelper for digispark.
- Changed label
looptotxloopinwrite1Start8Data1StopNoParity()for 38400 baud.
- OpenWindowAlarm example updated.
printHex()now using capital letters.- Improved OpenWindowAlarm example.
- Renamed example to be consistent.
Initial Arduino library version.
C version of serial code is included for better understanding, but assembler version is used. This is because for the C code the timing depends on compiler optimisation switches. You should get the right timing if you compile the C code it with Arduino standard settings or:
avr-g++ -I"C:\arduino\hardware\arduino\avr\cores\arduino" -I"C:\arduino\hardware\arduino\avr\variants\standard" -c -g -w -Os -ffunction-sections -fdata-sections -mmcu=attiny85 -DF_CPU=1000000UL -MMD -o "TinySerialOut.o" "TinySerialOut.cpp"