readme.txt

我制作过的usbisp资料, 仅供参考

/*****************************************************************************\
*                        USBisp by M. Wei遝r                                  *
\*****************************************************************************/

The USBisp is a STK500 compatible ISP programmer for the AVR family of 礐.
All AVR's with a serial isp-interface should be programmable.

The CAD data isn't made public.
You can get PCB's from me for a small amount of money.

If you wan't to use my PCB:
The PCB v1 fits approximately in a BOPLA E-406 case.
The PCB v2 fits exactly in a BOPLA E-406 case.

/*****************************************************************************\
*                            Content of directories                           *
\*****************************************************************************/

usbisp/
 +-app/    |   Sourcecode of application
 +-app_v2/ |   Sourcecode of application with STK500 v2
 +-boot/   |   Sourcecode of bootloader 
 +-cflcd   |   Sourcecode of the Crystal Fontz LCD application
 +-doku/   |   Some documentation                 
 +-bin/    |   Precompiled HEX files 

/*****************************************************************************\
*                Short manual to get up and running                           *
\*****************************************************************************/

After assembly the bootloader has to be programmed into the Mega8:

You simply close SJ3 on the back of the PCB and write the bootloader to the 
Mega8 with any AVR programming device.

fuse bit settings:

lfuse:  0xE4
hfuse:	0xDA

After installing the bootloader you should open SJ3.

No the bootloader should be able to run and you can program the application 
to the Mega8 via USB.

1: SW1 1 & 2 off
2: Plug into the USB cable
3: Bootloader will be started
4: SW1 1 & 2 on
5: red and green LED glowing
6: avrdude -p m8 -c STK500 -P xxx -e -U flash:w:xyz.hex
7: LED's blinking
8: Application is started
9: finished

/*****************************************************************************\
*                Connection of a HD44780 LCD to the USBisp                    *
\*****************************************************************************/

SCK    -> DB7
MISO   -> DB6
MOSI   -> DB5
R_RES  -> DB4
DF_SO  -> E
DF_SCK -> RW
DF_CS  -> RS

If you connect a LCD the USBisp you should assemble a 14 pin connector and not
a 10 pin one.

Some things to come...

Matthias Wei遝r
[e-mail]
http://www.matwei.de