avr
/
avrdude
mirror of https://github.com/mariusgreuel/avrdude.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

Update comment due to removal of the default parallel port pin config. 

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@219 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
bdean 2003-02-21 21:19:56 +00:00
parent 61ab2bc318
commit 6b29e029b6
1 changed files with 4 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
main.c
View File

@ -22,47 +22,10 @@
/*
* Code to program an Atmel AVR AT90S device using the parallel port.
*
* Pin definitions can be changed via a config file. Below is the
* default pin configuration in the absence of a config definition
* which lists "default" as one of its ids.
*
* Parallel Port Programmer Function
* ------------- -----------------------------
* Pins 2-5 -> Vcc (see note below)
* Pin 7 -> AVR /RESET
* Pin 8 -> AVR SCK (clock input)
* Pin 9 -> AVR MOSI (instruction in)
* Pin 10 <- AVR MISO (data out)
* Pin 18 Signal Ground
*
* Additionally, the following connections can be made to enable
* additional features, however, to enable these features use the
* pin configuration id "alf" ("-c alf" on the command line):
*
* Parallel Port Programmer Function
* ------------- -----------------------------
* Pin 1 STATUS LED, active low (program or verify error)
* Pin 6 -> /ENABLE ('367 bus driver)
* Pin 14 STATUS LED, active low (ready)
* Pin 16 STATUS LED, active low (programming)
* Pin 17 STATUS LED, active low (verifying)
*
* Pin 6 can be tied to the enable line of a 74HC367 in order to
* isolate and buffer the data to and from the PC parallel port.
* This is useful for connecting to a device in-circuit, and keeps
* the state of the parallel port pins from interfering with the
* normal operation of the target system. When programming is
* complete, this pin is driven high, causing to pins of the '367 to
* float.
*
* NOTE on Vcc connection: make sure your parallel port can supply an
* adequate amount of current to power your device. 6-10 mA per pin
* is common for parallel port signal lines, but is not guaranteed,
* especially for notebook computers. For additional power, use
* multiple pins tied together with Schottky diodes. If in doubt,
* don't risk damaging your parallel port, use an external power
* supply.
*
* For parallel port connected programmers, the pin definitions can be
* changed via a config file. See the config file for instructions on
* how to add a programmer definition.
*
*/
#include "ac_cfg.h"