versions of the firmware to each half. To flash the EEPROM file for the left
half run:
```
-avrdude -p atmega32u4 -P $(COM_PORT) -c avr109 -U eeprom:w:"./quantum/split_common/eeprom-lefthand.eep"
-// or the equivalent in dfu-programmer
-
-```
-and similarly for right half
+make handwired/dactyl_promicro:default:dfu-split-left
+make handwired/dactyl_promicro:default:dfu-split-right
```
-avrdude -p atmega32u4 -P $(COM_PORT) -c avr109 -U eeprom:w:"./quantum/split_common/eeprom-righthand.eep"
-// or the equivalent in dfu-programmer
-```
-
-NOTE: replace `$(COM_PORT)` with the port of your device (e.g. `/dev/ttyACM0`)
After you have flashed the EEPROM, you then need to set `EE_HANDS` in your config.h, rebuild the hex files and reflash.
update the following line in `matrix.c` to the following:
```
-// _delay_us(30); // without this wait read unstable value.
-_delay_us(300); // without this wait read unstable value.
+// wait_us(30); // without this wait read unstable value.
+wait_us(300); // without this wait read unstable value.
```