Putting HABL on an atmega168 MCU using USB in system programmer




Install compiler and avrdude (on debian/ubuntu/mint style linux):
apt-get install gcc-avr avr-libc binutils-avr avrdude



To compile (optional):
make



Some HW will be needed.


AVRISP MKII pin configuration.

AVR ISP (In-System Programming) Pinouts
1  MISO
2  VTG
3  SCK
4  MOSI
5  RESET
6  GND

Contact seen from below:
 +---+---+------- 
 | 5 | 6 |-------
[  3 | 4 |-------
 | 1 | 2 |-------
 +---+---+------- red

Pin one is the one marked red on flat cable.





The test board used looked like this:

                  ATMEGA168 28pin DIL
                   +------------+
         reset ----| 1          |
           RxD ----|            |
           TxD ----|            |
                   |            |
Resonator          |            |
16MHz              |            |
+---+      VCC ----| 7       22 |------------- GND
|  2|----- GND ----| 8          |
|  1|---- XTAL1 ---| 9       20 |---- VCC ---- VTG
|  3|---- XTAL2 ---| 10      19 |------------- SCK
+---+              |         18 |------------- MISO
                   |         17 |------------- MOSÍ
                   |            |
                   |            |
                   +------------+

A decoupling capacitor (100nF) between pin 7 and 8 is not shown above.

Connector J1 molex
+-------++
| 1 VCC ||
| 2 RxD ||
| 3 TxD ||
| 4 GND ||
+-------++

Connector J2 molex
+---------++
| 1 MOSI  ||
| 2 MISO  ||
| 3 SCK   ||
| 4 VTG   ||
| 5 Reset ||
| 6 GND   ||
+---------++




Power:                        7805
                             +-----+
batt+  ----diode>------------|     |-------------- VCC
                       |     +-----+     |
                   C1 ===       |       === C2
                       |        |        |
batt-  -------------------------+----------------- GND


C1,C2 = 100nF



Used an adapter cable from J2 to AVRISP MKII connector.
Used this to connect computer to J1: http://www.eit.se/opto_usb_uart



Programming the device (using avrispmkII)

Set read write properties on usb dev (or do this as root).





Check that you have connection with your device

avrdude -p m168 -P usb -c avrispmkII -U flash:r:flash.bin:r














First the fuse bytes needs to be programmed.



Extended fuse byte

For boot loader reset.
BOOTRST shall be 0

For boot loader size 512 words:
BOOTSZ1 shall be 0
BOOTSZ0 shall be 1
(If you use 1024 byte boot loader you need something else here.)
(If you change to use a 1024 word boot loader then you may neeed to adjust) (START_ADRESS_OF_BOOT_SECTION in Makefile also.)


With all other bits default the extended fuse byte should be: 11111010 

For some reason that did not work for me, used hex: 0x02 instead (that worked).


avrdude -p m168 -P usb -c avrispmkII -U efuse:w:0x02:m -u   -B 8



Bigger boot loader

For boot loader size 1024 words:
BOOTSZ1 shall be 0
BOOTSZ0 shall be 0
With all other bits default the extended fuse byte should be: 11111000 
For some reason that did not work for me, used hex: 0x00 instead (that worked).

(You neeed to adjust START_ADRESS_OF_BOOT_SECTION in Makefile also.)








High fuse byte

Used default (did not change it).




Low fuse byte

To use 8 MHz internal clock CKSEL shall be 0010 and CKDIV shall be 1.
With all other bits default this gives 11100010, in hex: 0xE2

But I use a 16 MHz resonator so CKDIV8=1, CKOUT=1, SUT=10, CKSEL=1110 which gives lfuse 11101110 0xEE



avrdude -p m168 -P usb -c avrispmkII -U lfuse:w:0xEE:m -u   -B 8











Downloading the boot loader program to flash


write:
avrdude -p m168 -P usb -c avrispmkII -U flash:w:habl.hex  -B 8




Test device with some hello world program.
Send the hello world binary using:
sudo apt-get install cutecom lrzsz
cutecom