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buspirate: change handling of communication speed setting + create serial port open function 

Signed-off-by: Michal Demin <michaldemin@gmail.com>
This commit is contained in:
Michal Demin 2010-10-22 23:26:43 +02:00 committed by Øyvind Harboe
parent d4de14dafe
commit 1ceb2c7e7a
1 changed files with 16 additions and 11 deletions
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27
src/jtag/drivers/buspirate.c
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@ -108,7 +108,8 @@ static void buspirate_jtag_set_feature(int, char, char);
static void buspirate_jtag_get_adcs(int);
/* low level HW communication interface */
static int buspirate_serial_setspeed(int fd, speed_t speed);
static int buspirate_serial_open(char *port);
static int buspirate_serial_setspeed(int fd, char speed);
static int buspirate_serial_write(int fd, char *buf, int size);
static int buspirate_serial_read(int fd, char *buf, int size);
static void buspirate_serial_close(int fd);
@ -215,13 +216,13 @@ static int buspirate_init(void)
return ERROR_JTAG_INIT_FAILED;
}
buspirate_fd = open(buspirate_port, O_RDWR | O_NOCTTY);
buspirate_fd = buspirate_serial_open(buspirate_port);
if (buspirate_fd == -1) {
LOG_ERROR("Could not open serial port.");
return ERROR_JTAG_INIT_FAILED;
}
buspirate_serial_setspeed(buspirate_fd, B115200);
buspirate_serial_setspeed(buspirate_fd, SERIAL_NORMAL);
buspirate_jtag_enable(buspirate_fd);
@ -770,7 +771,6 @@ static void buspirate_jtag_set_speed(int fd, char speed)
int ret;
char tmp[2];
char ack[2];
speed_t baudrate = B115200;
ack[0] = 0xAA;
ack[1] = 0x55;
@ -780,10 +780,7 @@ static void buspirate_jtag_set_speed(int fd, char speed)
buspirate_jtag_command(fd, tmp, 2);
/* here the adapter changes speed, we need follow */
if (speed == SERIAL_FAST)
baudrate = B1000000;
buspirate_serial_setspeed(fd, baudrate);
buspirate_serial_setspeed(fd, speed);
buspirate_serial_write(fd, ack, 2);
ret = buspirate_serial_read(fd, tmp, 2);
@ -873,15 +870,23 @@ static unsigned char buspirate_jtag_command(int fd,
/* low level serial port */
/* TODO add support for WIN32 and others ! */
static int buspirate_serial_setspeed(int fd, speed_t speed)
static int buspirate_serial_open(char *port)
{
int fd;
fd = open(buspirate_port, O_RDWR | O_NOCTTY | O_NDELAY);
return fd;
}
static int buspirate_serial_setspeed(int fd, char speed)
{
struct termios t_opt;
speed_t baud = (speed == SERIAL_FAST) ? B1000000 : B115200;
/* set the serial port parameters */
fcntl(fd, F_SETFL, 0);
tcgetattr(fd, &t_opt);
cfsetispeed(&t_opt, speed);
cfsetospeed(&t_opt, speed);
cfsetispeed(&t_opt, baud);
cfsetospeed(&t_opt, baud);
t_opt.c_cflag |= (CLOCAL | CREAD);
t_opt.c_cflag &= ~PARENB;
t_opt.c_cflag &= ~CSTOPB;