Clear all bits except AVR_RESET when finished reading or programming

the Atmel device.


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@13 81a1dc3b-b13d-400b-aceb-764788c761c2

avrprog.c

@@ -971,6 +971,9 @@ int main ( int argc, char * argv [] )
    */
 
   avr_powerdown(fd);
+  ppi_clr(fd, PPIDATA, 0xff);
+  ppi_set(fd, PPIDATA, AVR_RESET);
+
   close(fd);
   close(iofd);