Last night we spend atleast 3 hours to track down a little bug in the cpu fuse settings. After running first tests on the hardware we got debug uart and some basic sreg addressing working. Then we started to implement a sram read/write round trip. We found out that we read for all sram cells [...]
These two pictures show the different functional blocks of the prototype design. On the top side you have the MCU and next to it the connector for In-System-Programming and the MMC/SD daughter board. The yellow block marks the usb hardware for emulated software-usb on the mcu, the green block is the ram section. The orange [...]
Finally assembled and the pcb powers up. So iam posting a few more details photos. The boards powers up and the FTDI can be accessed via usb. So tomorrow i gonna meet with max and we will port the old firmware from the mega16 to the mega644. Tomorrow we might have simple usb based uploader [...]
This monday morning the long awaited first prototype PCB arrived from pcb-pool. We had a little UPS problem on friday, so we had to wait till monday to get the PCB. Max just started to solder all the chips, looking forward to get a working usb uploader firmware running till the next weekend. I think [...]
Got an mail from pcb-pool.de, our PCB is nearly done and will arrive this week. So the first prototype will be assembled over the weekend. Keep fingers crossed that everything is working as planed. Quick Featuers list ATMega 644 Software USB FTDI USB Debug port 4MB SRAM LO/HI Rom Switch SD Card Daughter Board AVR [...]
If you enjoyed the post, make sure you subscribe to the RSS feed.
© 2012
Powered by WordPress. Design by 