Hello all,
I'm new to arduino programming and run into issues with the examples.
I use an adafruit trinket 5v mini board, with Arduino 1.8.6 IDE, and USBtinyISP programmer setting.
When testing simple led blinking all works well.
However, none of the examples containing the Serial lines work.
After googling and reading on this forum, most issues are case related. Some are about SoftwareSerial library.
If I'm right I don't need the softwareserial, as this is included in the core now ?
This is the HT16K33 example code from the "Adafruit led backpack library":
/***************************************************
This is a library for our I2C LED Backpacks
Designed specifically to work with the Adafruit LED Matrix backpacks
----> Adafruit Mini 0.8 8x8 LED Matrix w/I2C Backpack - Yellow-Green : ID 872 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
----> Adafruit Mini 8x8 LED Matrix w/I2C Backpack - Yellow : ID 871 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
----> Adafruit Mini 8x8 LED Matrix w/I2C Backpack - Red : ID 870 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
These displays use I2C to communicate, 2 pins are required to
interface. There are multiple selectable I2C addresses. For backpacks
with 2 Address Select pins: 0x70, 0x71, 0x72 or 0x73. For backpacks
with 3 Address Select pins: 0x70 thru 0x77
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_LEDBackpack.h>
#ifndef _BV
#define _BV(bit) (1<<(bit))
#endif
Adafruit_LEDBackpack matrix = Adafruit_LEDBackpack();
uint8_t counter = 0;
void setup() {
Serial.begin(9600);
Serial.println("HT16K33 test");
matrix.begin(0x70); // pass in the address
}
void loop() {
// paint one LED per row. The HT16K33 internal memory looks like
// a 8x16 bit matrix (8 rows, 16 columns)
for (uint8_t i=0; i<8; i++) {
// draw a diagonal row of pixels
matrix.displaybuffer = _BV((counter+i) % 16) | _BV((counter+i+8) % 16) ;
- }*
- // write the changes we just made to the display*
- matrix.writeDisplay();*
- delay(100);*
- counter++;*
- if (counter >= 16) counter = 0; *
}
And below the error:
Compiling sketch...
/home/ken/arduino-1.8.6/hardware/tools/avr/bin/avr-g++ -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -flto -mmcu=attiny85 -DF_CPU=16000000L -DARDUINO=10806 -DARDUINO_AVR_TRINKET5 -DARDUINO_ARCH_AVR -I/home/ken/arduino-1.8.6/hardware/arduino/avr/cores/arduino -I/root/.arduino15/packages/adafruit/hardware/avr/1.4.13/variants/tiny8 -I/home/ken/arduino-1.8.6/hardware/arduino/avr/libraries/Wire/src -I/root/Arduino/libraries/Adafruit_GFX_Library -I/root/Arduino/libraries/Adafruit_LED_Backpack_Library /tmp/arduino_build_690654/sketch/HT16K33.ino.cpp -o /tmp/arduino_build_690654/sketch/HT16K33.ino.cpp.o
/tmp/arduino_modified_sketch_938923/HT16K33.ino: In function 'void setup()':
HT16K33:35:3: error: 'Serial' was not declared in this scope - Serial.begin(9600);*
- ^*
Using library Wire at version 1.0 in folder: /home/ken/arduino-1.8.6/hardware/arduino/avr/libraries/Wire
Using library Adafruit_GFX_Library at version 1.8.4 in folder: /root/Arduino/libraries/Adafruit_GFX_Library
Using library Adafruit_LED_Backpack_Library at version 1.1.6 in folder: /root/Arduino/libraries/Adafruit_LED_Backpack_Library
exit status 1
'Serial' was not declared in this scope
I've attached a screenshot of the error with selected board too.
Any help is welcome.
