add README with Timer usage overview

master
Eggert Jung 4 years ago
parent 408c586876
commit 79b6384063

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## Hardware usage
### Timers
|Timer| Type | Usage | Mode | used ISRs | Output connected
|-----|--------|-------------------------------|------------------------|----------------|------------------
| 0 | 8 bit | Millis Tick Timer | 2 (CTC) | COMPA | -
| 1 | 16 bit | | | |
| 2 | 8 bit | Modbus Tick Timer | 2 (CTC) | COMPA | -
| 3 | 16 bit | Step Signal Abzugsrolle | 8 (PWM, Phase & Freq.) | - | OC3B / PE4
| 4 | 16 bit | Step Signal Taenzer | 8 (PWM, Phase & Freq.) | OVF, ~~COMPA~~ | OC4A / PH3
| 5 | 16 bit | Step Signal Rotation Spule | 8 (PWM, Phase & Freq.) | - | OC5C / PL5