Please follow steps to flash ATmega with current CPM ATmega Firmware.
- Current Firmware: https://git.rwth-aachen.de/CPM/Project/Lab/software/tree/master/vehicle_atmega2560_firmware
Steps require Main Vehicle PCB to be connected to vehicle to provide power
For questions, please contact:
- Christoph Frauzem
1. Atmel Studio 7.0
Start Atmel Studio 7.0 and load current vehicle firmware solution vehicle_atmega2560_firmware.atsln
2. ICE Programmer
Make sure vehicle is powered off before connecting programmer
With vehicle power OFF, connect ICE programmer AVR Port to JTAG header.
Make sure to check pinout of Programmer, Vehicle and Connector Cable:
3. Fuses
Turn ON vehicle and connect to ATmega Chip using Device Programming (Apply and Read).
The following fuses deviate from the default and therefore need to be set correctly:
| Fuse | Correct Setting |
|---|---|
| HIGH.SPIEN | Unchecked |
| HIGH.EESAVE | Optional i.e. checked or unchecked |
| LOW.CKDIV8 | Unchecked |
| LOW.SUT_CKSEL | Ext. Crystal Osc. 8.0- MHz; Start-up time: 16 CK + 65ms |
If vehicle is behaving irregularly i.e. servo steering is acting erratic, LEDs timing appears off, this is most likely due to an issue with the clock.
- Check the above settings again.
- Check external crystal oscillater on bottom side of board using oscilloscope (should be 16MHz)
4. Flash ATmega
Flash chip using Start without Debugging
Turn OFF vehicle after flashing is complete BEFORE disconnecting programmer
5. Tests
By setting a jumper, a test mode is activated. This allows testing the inputs and outputs without the MLC.
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