AVR ISP Programmer
This is an AVR ISP Programmer which is controlled via COM port. Signal levels of the RS-232C line is converted to the target level, so that target device can operate in entire range of the VCC. And also it can be used as an communication cable to communicate between host PC and target program (this is explained in the following section). This ISP adapter is sufficient to develop most of the AVR applications.
Top image shows the built AVR ISP Programmer for COM port. It has a switch to connect/disconnect the ISP adapter from the target board. This feature is good for debugging process sided that "Load-Runner" (program/run again and again).
When build it, to put the level converter near the target board is better from viewpoint of stability and handling. I had built and used some ISP adapters and settled this form. This ISP adapter is controlled with AVRSP.EXE(Win32) or avrdude 5.1+.
# avrsp for avrdude 5.1 or later
# reset=dtr sck=rts mosi=txd miso=dsr
programmer
id = "avrsp";
desc = "serial port banging, reset=dtr sck=rts mosi=txd miso=dsr";
type = serbb;
reset = 4;
sck = 7;
mosi = 3;
miso = 6;
;
# reset=dtr sck=rts mosi=txd miso=dsr
programmer
id = "avrsp";
desc = "serial port banging, reset=dtr sck=rts mosi=txd miso=dsr";
type = serbb;
reset = 4;
sck = 7;
mosi = 3;
miso = 6;
;
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