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Support for Arduino auto-reset:

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* serial.h, ser_avrdoper.c, ser_posix.c, ser_win32.c: Added 
	  serial_device.set_dtr_rts implementations.
	* arduino.c, stk500.c, stk500.h: Call serial_set_dtr_rts()
	  to reset Arduino board before program upload.
	Inspired by patch #6866, resolves bug #26703



git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@845 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Michal Ludvig
2009-10-10 01:41:40 +00:00
parent b7766d1400
commit 819bb7dfeb
8 changed files with 103 additions and 4 deletions
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31
arduino.c
View File

@@ -82,13 +82,40 @@ static int arduino_read_sig_bytes(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m)
return 3;
}
static int arduino_open(PROGRAMMER * pgm, char * port)
{
strcpy(pgm->port, port);
serial_open(port, pgm->baudrate? pgm->baudrate: 115200, &pgm->fd);
/* Clear DTR and RTS to unload the RESET capacitor
* (for example in Arduino) */
serial_set_dtr_rts(&pgm->fd, 0);
usleep(50*1000);
/* Set DTR and RTS back to high */
serial_set_dtr_rts(&pgm->fd, 1);
usleep(50*1000);
/*
* drain any extraneous input
*/
stk500_drain(pgm, 0);
if (stk500_getsync(pgm) < 0)
return -1;
return 0;
}
void arduino_initpgm(PROGRAMMER * pgm)
{
/* This is mostly a STK500; just the signature is read
differently than on real STK500v1 */
differently than on real STK500v1
and the DTR signal is set when opening the serial port
for the Auto-Reset feature */
stk500_initpgm(pgm);
strcpy(pgm->type, "Arduino");
pgm->read_sig_bytes = arduino_read_sig_bytes;
pgm->open = arduino_open;
}