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Documented the usage of the internal oscilator

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ollo 2018-12-08 00:22:39 +01:00
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README.md
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@ -11,15 +11,25 @@ Programmer, e.g.:
* AVRISPmkii * AVRISPmkii
## Software ## Software
### Arduino
In order to flash the software, select the following settings in Arduino: In order to flash the software, select the following settings in Arduino:
* Tools | Board "Arduino NG or older" * Tools | Board "Arduino NG or older"
* Tools | Processor "Atmega8" * Tools | Processor "Atmega8"
In your arduino installtion, update the CPU frequency, as we are using the internal clock with 8Mhz.
Find the following file */hardware/arduino/avr/boards.txt*.
Inside the file, search for the chapter **Arduino NG or older w/ ATmega8** and add the following line:
```
atmegang.menu.cpu.atmega8.build.f_cpu=8000000L
```
### Avrdude
The flashing itself is done with **avrdude**: The flashing itself is done with **avrdude**:
```bash ```bash
avrdude -c AVRISPmkii -p m8 -u -U flash:w:SideboardLED.ino.standard.hex avrdude -c AVRISPmkii -p m8 -u -U flash:w:SideboardLED.ino.standard.hex
``` ```
Initial once the fuses must be burned: Initial once the fuses must be burned:
```bash ```bash
avrdude -c avrispmkii -p atmega8 -U lfuse:w:0xee:m -U hfuse:w:0xd9:m -U efuse:w:0xfc:m avrdude -c avrispmkii -p atmega8 -U lfuse:w:0xe4:m -U hfuse:w:0xd9:m -U efuse:w:0xfc:m
``` ```