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Add -xautoreset option for the AVR109 programmer

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MCUdude
2024-07-22 17:31:07 +02:00
parent 5dc2399694
commit aebf970d0c
1 changed files with 51 additions and 7 deletions
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58
src/butterfly.c
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@@ -60,6 +60,7 @@ struct pdata
int ctype; // Cache one byte for flash
unsigned char cvalue;
unsigned long caddr;
bool autoreset;
};
#define PDATA(pgm) ((struct pdata *)(pgm->cookie))
@@ -361,9 +362,8 @@ static void butterfly_enable(PROGRAMMER *pgm, const AVRPART *p) {
static int butterfly_open(PROGRAMMER *pgm, const char *port) {
union pinfo pinfo;
pgm->port = port;
/*
* If baudrate was not specified use 19200 Baud
*/
// If baudrate was not specified use 19200 Baud
if(pgm->baudrate == 0) {
pgm->baudrate = 19200;
}
@@ -373,9 +373,22 @@ static int butterfly_open(PROGRAMMER *pgm, const char *port) {
return -1;
}
/*
* drain any extraneous input
*/
if(PDATA(pgm)->autoreset) {
// This code assumes a negative-logic USB to TTL serial adapter
// Set RTS/DTR high to discharge the series-capacitor, if present
imsg_notice2("Toggling the DTR/RTS lines to trigger a hardware reset\n");
serial_set_dtr_rts(&pgm->fd, 0);
usleep(250 * 1000);
// Pull the RTS/DTR line low to reset AVR
serial_set_dtr_rts(&pgm->fd, 1);
// Max 100 us: charging a cap longer creates a high reset spike above Vcc
usleep(100);
// Set the RTS/DTR line back to high, so direct connection to reset works
serial_set_dtr_rts(&pgm->fd, 0);
usleep(100 * 1000);
}
// Drain any extraneous input
(void) butterfly_drain(pgm, 0);
return 0;
@@ -681,6 +694,37 @@ static int butterfly_read_sig_bytes(const PROGRAMMER *pgm, const AVRPART *p, con
return 3;
}
static int butterfly_parseextparms(const PROGRAMMER *pgm, const LISTID extparms) {
const char *extended_param;
int rv = 0;
for (LNODEID ln = lfirst(extparms); ln; ln = lnext(ln)) {
extended_param = ldata(ln);
if(str_starts(extended_param, "autoreset")) {
if(!str_eq(extended_param, "autoreset")) {
pmsg_error("invalid -xautoreset value %s. Use -xautoreset\n", extended_param);
rv = -1;
break;
}
PDATA(pgm)->autoreset = true;
continue;
}
if (str_eq(extended_param, "help")) {
msg_error("%s -c %s extended options:\n", progname, pgmid);
msg_error(" -xautoreset Toggle RTS/DTR lines on port open to issue a hardware reset\n");
msg_error(" -xhelp Show this help menu and exit\n");
exit(0);
}
pmsg_error("invalid extended parameter '%s'\n", extended_param);
rv = -1;
}
return rv;
}
const char butterfly_desc[] = "Atmel Butterfly evaluation board; Atmel AppNotes AVR109, AVR911";
void butterfly_initpgm(PROGRAMMER *pgm) {
@@ -714,7 +758,7 @@ void butterfly_initpgm(PROGRAMMER *pgm) {
pgm->paged_load = butterfly_paged_load;
pgm->read_sig_bytes = butterfly_read_sig_bytes;
pgm->parseextparams = butterfly_parseextparms;
pgm->setup = butterfly_setup;
pgm->teardown = butterfly_teardown;
pgm->flag = 0;