Category:Arduino

Coding

Data Handler

Function	Description	Category
strncpy	copy string or char array to string or char array	String and Char
stringOne += 12345678	add to string	String and Char
char charBuf[50]; stringOne.toCharArray(charBuf, 50)	string to char array	String and Char

Board Manager Links

Name	Board	Link
ESP8266	ESP8266	http://arduino.esp8266.com/stable/package_esp8266com_index.json
Digispark	ATTINY85 Digispark	http://digistump.com/package_digistump_index.json
ESP32	ESP32	ttps://github.com/espressif/arduino-esp32	Need to install
Attinycore	Attiny	http://drazzy.com/package_drazzy.com_index.json	Not include ATTINY13
Microcore	Attiny, attiny13	https://mcudude.github.io/MicroCore/package_MCUdude_MicroCore_index.json
DIY ATttiny	Attiny, attiny13	https://raw.githubusercontent.com/sleemanj/optiboot/master/dists/package_gogo_diy_attiny_index.json
Redbear	NRF51822	https://redbearlab.github.io/arduino/package_redbearlab_index.json
SAMD	SAMD	Official

• For STM32, see on this page STM32
• Copy into preference, and install in board manager
• atmega 8 - minicore - https://github.com/MCUdude/MiniCore

Firmware

Use Arduino as ISP

There is sketch in the arduino IDE, for the wiring in the description should be:

pin name	not-mega	mega(1280 and 2560)
SS(Slave Reset)	10	53
MOSI	11	51
MISO	12	50
SCK	13	52

upload the sketch and use Avrdude to test it, and should success on following picture

Burning bootloader

• Tools you will need:
• USBASP programmer: in our test, it's much faster than the USBtinyISP, don't know really know why, burning with usbasp only need 5-10 seconds, but usbtinyisp need around 1-2 minutes
• ISP 10-6 Pins converter: It's really helpful to convert ISP 10 pins to ISP 6 pins, and also help you to remember the pins for ISP-6, because the silk print indicate it! Works for all the ISP-10 programmer.And Arduino only have 6-pin ISCP connector
• Your arduino board: The MCU is already on the board and need to be programmed.
• Connect the programmer with the converter like below, only need to remember MISO is always to PIN1:
  
• Connect the board with USBASP to your laptop and burn, no need USB connect to the board anymore

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  upload sketch normallynow

Burning bootloader with other programmer, directly via hex file

Use Avrdudess programming

You can find the avrdude we used here.programmer

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  Flash use avrdudess GUI

Fuse bit

• Atmega328p UNO

hfuse - 0xDE
lfuse - 0xFF
efuse - 0x05

• Lock bit

1. BLB12 BLB11 - app to bootloader
2. BLB02 BLB01 - bootloader to app
3. LB2 LB1 - visit control to Flash, EEPROM, Fuse (hfuse, lfuse, efuse) and Boot Lock Bit

• bootloader area NOT visit-able - lfuse set to 0x0F
• bootloader area visit-able - lfuse set to 0x3F

Deploy arduino

• complied code and find file for example named "nrf24duino_start.ino.with_bootloader.hex" in folder C:\Users\Administrator\AppData\Local\Temp\arduino_build_981353
• flash write into MCU
• pro mini fuse set, L:0xFF, H:0xDA, E:0xFD, LB:0x0F

Other type bootloader

• https://github.com/SpenceKonde/ATTinyCore
• https://github.com/damellis/attiny
• https://github.com/mikaelpatel/Cosa
• https://github.com/leomil72/megax8
• https://github.com/MCUdude/MicroCore

Specifications

• 

  the relationship between voltage and speed

Tips

Fix auto upload manually

• Hold down the reset button when IDE show "compile ..."
• Release the reset button when IDE show "uploading ..."

Extension

• Scratch extension

Documents

• STM32 Nucleo Toolchain use manual
• Eclipse extension with GCC toolchain

Documents

• See how to make minimal Arduino on this page DIY-arduino
• List of unofficial boards for arduino ide