avr/avrdude
2
0
Fork 0
mirror of https://github.com/mariusgreuel/avrdude.git synced 2025-12-16 02:31:06 +00:00
Code Issues Projects Releases Wiki Activity

Use -B <bitclock> rather than -b <baudrate> to specify the clock rate

Browse Source 
in linuxspi driver.

This offers the additional advantage of being able to parse kHz and
MHz values (in main.c).


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1497 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Joerg Wunsch
2021-11-27 18:21:44 +00:00
parent dd1255b0c8
commit 2aee540bfa
3 changed files with 22 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
linuxspi.c
View File

@@ -78,8 +78,7 @@ static int linuxspi_spi_duplex(PROGRAMMER *pgm, const unsigned char *tx, unsigne
.rx_buf = (unsigned long)rx,
.len = len,
.delay_usecs = 1,
//should settle around 400Khz, a standard SPI speed. Adjust using baud parameter (-b)
.speed_hz = pgm->baudrate == 0 ? 400000 : pgm->baudrate,
.speed_hz = 1.0 / pgm->bitclock, // seconds to Hz
.bits_per_word = 8,
};
@@ -213,6 +212,19 @@ static int linuxspi_open(PROGRAMMER *pgm, char *port)
if (ret)
goto close_out;
if (pgm->baudrate != 0) {
avrdude_message(MSG_INFO,
"%s: obsolete use of -b <clock> option for bit clock; use -B <clock>\n",
progname);
pgm->bitclock = 1E6 / pgm->baudrate;
}
if (pgm->bitclock == 0) {
avrdude_message(MSG_NOTICE,
"%s: defaulting bit clock to 200 kHz\n",
progname);
pgm->bitclock = 5E-6; // 200 kHz - 5 µs
}
return 0;
close_out:
@@ -306,7 +318,7 @@ static int linuxspi_program_enable(PROGRAMMER *pgm, AVRPART *p)
*/
if (linuxspi_reset_mcu(pgm, false))
return -1;
usleep(3 + (pgm->baudrate ? 500000 / pgm->baudrate : 1));
usleep(5);
if (linuxspi_reset_mcu(pgm, true))
return -1;
usleep(20000);